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1. MPRT shown with optional large carry handle Model MPRT Megger Protective Relay Tester Part 710000 Rev 3 Date 11 15 2005 Revision History Revision ECN Date 1 Initial Release 12 17 2003 2 30043 3 07 2005 3 30207 11 16 2005 IMPORTANT This manual as well as the hardware and software described in it is furnished under license and may be used or copied only in accordance with the terms of such license The content of this manual is furnished for informational use only is subject to change without notice Megger assumes no responsibility or liability for any errors or inaccuracies that may appear in this manual The information and data in this User Manual are proprietary The equipment described herein may be protected by U S patents Megger specifically reserves all rights to such proprietary information as well as rights under any patent none of which is waived by the submission of this user manual Except as permitted by such license no part of this publication may be reproduced stored in a retrieval system or transmitted in any form or by any means electronic mechanical recording or otherwise without the prior written permission of Megger Megger the Megger logo are trademarks of Megger VXWorks Zinc and Tornado are either registered trademarks or trademarks of the WindRiver Corporation in the US and other countries Adobe the Adobe logo and Adobe Reader are trademarks of Adobe Systems Incorporate
2. 107 3 8 8 3 2 Testing Reclosing Relays Reclose Only Timing and Sequence to Lockout 110 3 8 8 3 3 Testing Distribution Relays with Trip Reclosing and Sequence to Lockout 114 3 8 9 Frequency Relay Test Menu 118 3 8 9 1 Frequency Relay Setting Green 119 3 8 9 2 Frequency Relay Pickup Test Results cccccoocccccconccnconocnncononcnnonnnnnconanenonnnncnnnnnos 120 3 8 9 3 Frequency Relay Target Seal In Test Screen ccooonnccccccncncoconcnncconnnconancnnnnonenonnnos 120 3 8 9 4 Frequency Relay Timing Test Screen oooonncccnncccccccnonccnnnncconononnncnnnnnnnnnannnnnnnnononnnnns 122 3 8 9 4 1 Dynamic Frequency Timing Test 122 3 8 10 Manual Test Menu Gcreen 124 3 8 10 1 Manual Voltage Current Test Gcreen ne 125 DESCUIDO asia TAE AAA id 125 Opera Muestreo esta sl sa ll ra nat hs accio siete ands catalina cali 125 Controlar donde 125 3 8 10 2 Manual Frequency Test Settings Gcreen nene 128 PS SCRID MOM ardid dando tdi aaa 128 OPETAN EE 128 CONTO Stan des 128 Dynamic Frequency ODE alada coito 131 3 8 10 3 Manual Auto Synchronizing Test Screen oooooocccccccnnccccccooocccccccccnnnnccnonononnnannnno 132 DESCUIDO to ln 132 UN o 132 Een 132 Testing Synchronizing and Auto Synchronizing Relays sooeeannnnneeossnnnrnnessnnnnrrreesssnnrrrreee 133 3 8 10 4 Manual Transducer Test Settings Gcreen nnn 135 301041 Select Transducer EEN 135 39 10 42 Transducer Deschpliol irsana tee euciaas 135
3. 55 e The timing test jumps from the pre fault value to the fault value and times how long the relay takes to trip e The Run Test button is used to execute the current test setup The bottom of the screen has common buttons File This selection will take the user to the File Manager Batt Sim Off Batt Sim On This selection will turn the Battery Simulator On and Off Test Menu This selection will return the controller to the Test Menu Screen Main Menu This selection will return the controller to the Main Menu Start Stop This selection will apply the set quantities displayed and begin the test After Start is pressed this button will turn red and display Stop Pressing Stop at any time will stop the test and turn the outputs off 3 8 2 6 Impedance Relay Timing Test Result Screen Impedance Timing Test Settings Test Frequency 60 Hz Prefault Settings Relay Settings Prefault Voltage 69 26 N Current 3 0 Amps Angle Lagging 75 0 Degrees Time 100 0 mS Hold Test Amplitude Fault Value Fault Hold Test Amplitude Timer Setup Stop N O Latch On Open f Figure 36 Impedance Timing Test Setting Screen This screen displays the results upon test completion The Zone and Fault values are copied from the setting screen while all other values are calculated from the test results 56 The bottom of the screen has common buttons File Batt Sim Off Batt Sim On Test Menu Main Menu Start Stop
4. This selection will take the user to the File Manager This selection will turn the Battery Simulator On and Off This selection will return the controller to the Test Menu Screen This selection will return the controller to the Main Menu This selection will apply the set quantities displayed and begin the test After Start is pressed this button will turn red and display Stop Pressing Stop at any time will stop the test and turn the outputs off 57 3 8 2 7 Impedance Relay Angle of Torque Test Settings Screen The angle of torque settings screen allows the operator to input the values necessary to perform the relay angle of torque test Impedance Angle of Torque Test Settings Test Frequency 60 Hr Prefaull Setting Prefaull Voltage 659 28 N Angle Lagging 75 0 Degrees Test Amplitude Test Amplitude Timer Setup Monit NO Latch Ort k Figure 37 Angle of Torque Setting Screen e The Pre fault Settings button will change screens and will allow changes to meet the manufacturer specifications If the factory defaults are used a one time warning message should be displayed to notify default values are being used e The Relay Settings button will change screens and will allow changes to meet the manufacturer s specifications e The Timer Setup screen allows the user to define how the time will be used e The Fault Type determines the fault the test will perform The accepted values are AG BG CG AB BC C
5. If you want to de energize the voltage to the relay when it trios use the Auto Off feature The Timer starts the relay trips and stops the Timer It then removes power from the outputs See Voltage Relay in section 3 8 5 3 4 3 30 3 Wire Open Delta and T Connection 3 4 3 1 Open Delta Two methods of obtaining a three phase three wire voltage source are available The Open Delta configuration referenced in the following figure is the easier to use when a balanced three phase source and it is required because the amplitude and phase relationship can be set directly No calculations are necessary When using the Open Delta Configuration to set up a phase to phase fault calculations using the Law of Cosines is required to calculate amplitude and phase relationships See discussion under T Connection for simulating unbalanced phase to phase faults without need for calculations When using the Open Delta configuration it is suggested to use voltage channel 1 designated V4 and voltage channel 2 designated V2 while the COMMON binding post is designated V With this arrangement the magnitude and phase angle of the potentials can be easily calculated and set For the balanced three phase condition Vig and Vag are equal in magnitude and 35 separated by an angle of 60 This is done by setting the V and V potentials equal in magnitude setting 0 on V and 300 60 degrees leading assuming that the default phase rotation i
6. There are several options to further define the tests to be performed Selecting one of these options will present the test setup screen for that option The bottom of the screen has common buttons File This selection will take the user to the File Manager Test Menu This selection will return the controller to the Test Menu Screen Main Menu This selection will return the controller to the Main Menu 3 8 6 1 Synchronous Relay Setting Screen oynchronous Relay Settings Test Frequency 60 Hz Closing Angle Slip Frequency 4710 i Kl l Normal Volt Wolis oe 69 28 File Test Main Meru Menu Figure 65 Synchronous Relay Setting Screen Larei Tap 0 2 Tolerance ms 100 Pickup P DESS E Tolerance Degrees 10000 e The Timing Settings button will change screens and will allow changes to meet the manufacturer specifications e The Pickup Settings button will change screens and will allow changes to meet the manufacturer s specifications e Closing Angle with Tolerance Slip Frequency Target Tap Time Setting with Tolerance and Normal Voltage need to be set unless factory defaults are used The bottom of the screen has common buttons File Batt Sim Off Batt Sim On Test Menu Main Menu Start Stop This selection will take the user to the File Manager This selection will turn the Battery Simulator On and Off This selection will return the controller to the Test Men
7. 0 5 Therefore the theoretical range of output from the transducer would be 0 5 Power Factor if the output current is 1 milliampere to 0 5 Power Factor if the output current is 1 milliampere For this example let s say that the measured output voltage is 120 0 Volts at 0 and the measured output current is 5 000 Amperes at a lagging angle of 151 30 The calculated Power Factor displayed next to Power Factor 3 Element would be COS 30 0 866 PF For this example let s assume the measured output current from the transducer is 0 489 mA dc Based on a Lead Lag value of 1 mA equals 0 5 PF the scaling would be equal to 0 5 PF COS 60 1 mA 60 or 0 016666 mA per degree Therefore the displayed PF in the Transducer Output section of the Transducer Test Screen should read 0 489 mA 0 016666 mA Degree 29 35 Degrees COS 29 35 0 871 PF Power factor transducer accuracies are stated in units of Power Factor not in error Therefor the Accuarcy window for Power factor transducers needs to change from error to 0 000 PF For the above example the Accuracy displayed in the Transducer Output section would be equal to the following 0 871 0 866 0 005 PF If the accuracy of the transducer were a 0 01 PF then the firmware would compare the accuracy values between the Setting Screen and the Test Screen and would display PASS in the Transducer Output section of the test screen 3 8 10
8. From the above figure it can be seen that the BINARY OUTPUT Terminals 1 amp 2 have been selected to simulate the circuit breaker 52B and 52A contacts Pressing the X changes the contact to open indicated by the number 0 Pressing again changes it to be closed indicated by the number 1 Note while fault current is being applied to the relay Binary Output 1 will be closed and Binary Output 2 is open When the relay trips it will record the trip time for the operation and toggle the BINARY OUTPUT contacts When the test set toggles the BINARY OUTPUT contacts it starts the reclose timer Pressing Enter sets the Binary Inputs and Outputs Pressing Main Menu takes you back to the test selection screen Note That the test set will wait for the relay reclosing contacts to close during the Brk Trip simulation This time will appear in the Test Screen as the Reclose Time However if there is a problem with the relay which prevents the relay from reclosing the breaker then the test set will wait until the Lockout Time has expired When the Lockout Time has expired all outputs will turn off and the test will be aborted 15 Press the Timing Test Button this will take you to the Reclose Timing Test Screen Press the Start Button in the lower left corner see Figure below The test set applies the output voltage s and fault current until the relay trips sensed on BINARY INPUT 1 Upon sensing trip the output current is turned off and BINARY OUTPUT c
9. The pulse ramping can begin once the relay is energized The first pulse has a selectable amplitude for the start value This value is held for the defined Pulse Time in cycles The generator output returns to the Pre fault Value The time the relay remains at this level is determined by the Delay Time minus the Pulse Time The next pulse is increased by the increment value specified The voltage magnitude and angle will be calculated for each of the three phases when the test is complete The current is calculated for the three phases The percent error is calculated for the Reach The resistance is calculated for the final value A fault calculator based on symmetrical components is used to perform the fault calculations 3 5 2 Ramping The Ramping test maybe used to determine pickup values verify single zone impedance relays or the outer most zone of a multi zone impedance relays For example using the Ramping for finding the reach of an impedance relay select the fault type from a list Determine whether the voltage or the current is to be held constant In the angle of torque calculation both the voltage and current are held constant while the angle is ramping Start with a pre fault current voltage for the Pre fault Delay Time to ensure the relay is energized before the test begins The Pre fault Delay Time has been specified in milliseconds and the factory default value is 1000 milliseconds 60 cycles at 60 Hz The ramping starts once the
10. The test leads supplied with the unit are rated for the continuous output ratings of the test system and should be properly used and cared for DO NOT use cracked or broken test leads Always turn the test system off before disconnecting the power cord or removing inserting output modules Turn the power off when removing or inserting the Voltage Current module s DO NOT power up without the modules secured in their respective slot DO NOT attempt to use the unit without a safety ground connected DO NOT attempt to use the unit if the power cord ground prong is broken or missing Under no circumstances should the operator put their hand or tools inside the test system chassis area with the test system connected to a power source Lethal voltages are present and Loi may cause serious injury or death Table of Contents Section Page REVISION HISO oia nicas 2 STEE EG 4 o EE 11 isd e de a o Ao 11 1 1 1 Sl eebe 11 1 1 2 o eo OA O o esas eee 12 US TOUCH VIEW INC tica 14 162 KT dr Le e e VT EE 15 1 2 1 Ae Ke 15 T22 ee Re e E E 15 1 2 2 1 NA 15 1 2 2 2 TME RI WEE 16 1 2 2 3 INSTANTANEOUS InsSt Tan 16 1 2 2 4 A O O nem eee ee ee ee 16 1 2 2 5 EST etc cl EE 16 1 2 2 6 Testr MUND A a O A 16 1 2 2 7 A O A 16 1 2 2 8 Keis ELE 16 1 2 2 9 Operation OD TIME s aan 16 e ale Hate lis uge LEE 17 e fl I ae ee 17 T2212 Recent a e 17 13 TOUCH View Interface TVI atada 17 14 Input POWeFr NA Contool rirse ida 17 1 4
11. e For electro mechanical relays a single set point time dial and a step function are required e For the solid state relay multiple set points may be used in conjunction with multiple times plus a step or ramp function e The step function or ramp rate may be single or double and the use of step ramp may be commingled The bottom of the screen has common buttons File This selection will take the user to the File Manager Test Menu This selection will return the controller to the Test Menu Screen Main Menu This selection will return the controller to the Main Menu 149 3 8 9 2 Frequency Relay Pickup Test Results This screen displays the results upon test completion No data may be entered in this screen Frequency Pickup Test Test Frequency 60 Hz i Timing Relay Settings Target amp Seal irn FREQUENCY E Monic HO Latch Off Figure 91 Frequency Relay Pickup Test Screen e The Timing Settings button will change screens and will allow changes to meet the manufacturer specifications e The Target A Seal In Settings button will change screens and will allow changes to meet the manufacturer specifications The bottom of the screen has common buttons File This selection will take the user to the File Manager Batt Sim Off Batt Sim On This selection will turn the Battery Simulator On and Off Test Menu This selection will return the controller to the Test Menu Screen Main Menu This selection w
12. has a low AC voltage and the point at which the contact in the test circuit opens or closes is at or close to zero on the sine wave the period of time before the voltage level will be high enough to trigger the gate circuit can be as much as 4 milliseconds The total timing variation can be as much as 8 milliseconds The shorter the duration of the timing test the more significant the variation becomes Therefore if small timing variations would present a problem it is recommended that an AC voltage of 115 volts or above or a DC voltage be used for voltage applied removed test selections When the MPRT Timer calibration is being tested the AC voltage variable is often overlooked This is particularly true when the Timer is compared to a counter and the two are triggered simultaneously with an electronic switch For best results a DC voltage should be used to eliminate the variable If testing the AC voltage Start Stop characteristics is desired then the Start Stop signal must be triggered at the same point on the sine wave to assure that the gate signal will be repeatable Ideally the signal should be at a point near peak in the positive direction In addition the specified rms AC voltage values for the various Start Stop control selections must be adhered to Another source of apparent error can be the programmable de bounce feature If using electro mechanical contacts for starting and stopping the Timer and if those contacts have a ten
13. ramped The two currents are set to different frequencies The starting current is determined by the value entered With the harmonic current preset i e 1 ampere the second current channel fundamental will be increased at the preset ramp rate until the relay trips or the max value is reached 3 5 11 Slope This test uses two current generators The starting current is determined by the value entered The current on one V I Generator starts at the selected value and is labeled the operate generator It starts at 12 x Slope x 0 9 The restraint current is set as 12 The operate current will be increased at the preset ramp rate until the relay trips or the max value is reached 3 5 12 Through Fault This test uses two current generators in parallel The test is executed and the output current is applied to the relay The test monitors the relay contact to determine if it is open or closed 3 5 13 Polarizing This test uses all three current generators where the output current for each generator is paralleled at the relay The test is executed and the output current is applied to the relay This test does not monitor any contacts but does step the generator outputs to the current value selected The duration is selected with a maximum time of four cycles to ensure no damage occurs 44 3 6 Timer Due to the timer complexities on the MPRT there are two timer screens There is a basic timer control screen and the complex timer control sc
14. test multiple s need to be set unless factory defaults are used Select one of Extreme inverse EI inverse b 3 Figure 42 IEEE Time Curve Selection Menu Once the multipliers are selected the expected theoretical trip times are displayed according to the curve type curve shape and time dial selected previously User defined trip times can be typed into Theo Trip Time Multiples A B C fields if the relay does not have an IEEE ANSI or IEC standard curve 63 3 8 3 2 Overcurrent Relay Test Configuration Screen The test configuration menu is used to adjust the advanced relay testing parameters The TVI has default test parameters that should not need to be adjusted by the user If the user has determined these values do need to be adjusted then following the directions in the TVI Operations section Test Configuration Screen Test Frequency 60 Hz Pickup ramp Instantaneous pulse Targel Seal in ramp Specifications specification Increment D Cup Increment I F T e 00 020 Pulse Time Onicyec Pulse Time Off cyc 60 00 Relay Settings Menu Figure 43 Test Configuration Screen Pickup Ramp Specifications Increment 10 cycles This value is used to control the how fast the MPRT will increase the current to determine the pickup value The value input into this field is in increase per 10 cycles The default value for this field is 02 of pickup Example If the pickup value requires 1 0 am
15. to 0 5 Power Factor if the output current is 1 milliampere For this example let s say that the measured output voltage is 120 0 Volts at 0 and the measured output current is 5 000 Amperes at a lagging angle of 30 The calculated Power Factor displayed next to Power Factor 1 Element would be COS 30 0 866 For this example let s assume the measured output current from the transducer is 0 489 mA dc Based on a Lead Lag value of 1 mA equals 0 5 PF the scaling would be equal to 0 5 PF COS 60 1 mA 60 or 0 016666 mA per degree Therefore the displayed PF in the Transducer Output section of the Transducer Test Screen should read 0 489 mA 0 016666 mA Degree 29 34 Degrees COS 29 34 0 871 PF Power factor transducer accuracies are stated in units of Power Factor not in error Therefor the Accuarcy window for Power factor transducers needs to change from error to 0 000 PF The Accuracy displayed in the Transducer Output section would be equal to the following 0 871 0 866 0 005 PF 143 If this were a 0 01 PF transducer then the firmware would compare the accuracy values between the Setting Screen and the Test Screen and would display PASS in the Transducer Output section of the test screen 3 8 10 7 3 Watt VAR1 1 2 Element This transducer is normally used in single phase three wire applications which requires 2 voltages and 2 currents to test The MPRT will automatically se
16. 1 1233 011 233 ILERI Hechos Mina 000543 00543 15430 imi LH bh 7 RB Y Tran Tee Ur OC DR OCH 0 000 Heriya Tires E pon Du LA LO FREE Figure 79 4 Trip and 3 Reclose Timing Test Trip amp Reclose Timing Tests Using MPRT A E Cl e e E E e T1 T2 T3 T4 R Ri R2 R3 Lock Cut TO R Relay Reclosing Contacts T Relay Trip Contacts TO Start of Test A Normally Closed Contacts Ti T4 Recorded Trip Times E Normally Open Contacts D Delay Time E Ri R3 Recorded Reclose Times 109 3 8 8 3 2 Testing Reclosing Relays Reclose Only Timing and Sequence to Lockout From the MAIN MENU Screen select RECLOSING RELAY The following screen should be displayed Reclose Test Menu Test Frequency 60 Hz Relay Settings Timing Figure 80 Reclosing Relay Menu Screen Note If relay is solid state or microprocessor based and requires a DC logic voltage prior to applying test connect the relay dc power terminals to the BATTERY SIMULATOR terminals The Battery Simulator voltage may be set and turned on in the Relay Test Screen le Select Relay Settings The following screen should appear The Relay Tap Time Dial and Test Multiple should be set to zero see Testing Distribution Relays with Reclosing for use of these inputs Set the No of Operations to the desired number of trips you want to simulate this is the number of times the Binary Output contacts will be toggled Note if the reclosing relay is a three sho
17. 1 Ile gg Ge ad a od ido cart 17 142 EE 17 1 4 2 1 vliGenerator Module ao dsc add e let 17 1 4 2 1 1 Voltage and Current RANES sei dla aa ea 18 1 4 2 1 1 1 Model 8415 each output Module ccccccoooccnncccconncnncncnnncnnnnnonaconnnnonancnnnonnnanennnnss 18 1 4 2 1 1 2 Model 8430 each output module ccccccoooccnncccconncnncncnnnncnncnonononcnnnnannnnnonnnanennnnss 18 1 4 2 1 2 Frequency THANG OS iia aida 18 1 4 2 1 3 Pase Ano lid ee eer 18 LS TIMEr CONTO a Ech 18 1 5 1 Seilen 19 1 5 1 1 start Stop Bee Oe ie rel 19 Ree fe Dy CONAC ODER EE 19 131 12 Dr n Cl 19 Slides Application or Removal of AC or DC voltage 19 132 EE KEE OS 20 16 Battery Simulator o e e o ed a 20 1 7 Transducer DC IN Measuring Circeun 20 1 8 Operation of Optional High Current Interface 20 20 EUR o e o le Ni 20 SS O An Cnet ENCES eR Rae ee eae eee 20 2 2 Touch View Interface Operation 21 2 2 1 TOUCH Panel DIS DIA Vinci 22 2 2 1 1 e A A 22 2 2 1 2 AIDMANUMENIG Keypad EE 22 222 ie uge e Le EE 22 Zeid Factory Deal oscura 23 2 2 3 1 Rz tutelgr Te 23 2 2 3 2 CONT EE UN EE 23 E ELI RL NSS rset Sarde cet sca earnestness a aes aaa amma sia manta 23 2 2 3 4 Ale E Ito rmMalon ocre iaa 24 2 2 3 5 RES wie TIME acid dias 24 2 2 3 6 Battery Simulator Set Ng DEE 24 2 23 Je ele 24 2 2 3 8 SERO y 0 POP CPE ee ee 24 2 2 3 9 GPIB AGO SS wi sissies iii 25 2 2 3 10 Convertible V I Control 25 2 2 3 11 Phase Angle Setting 000
18. 11 12 18 14 generator Mag Controls the Magnitude of any installed voltage V1 V2 V3 V4 or current 11 12 13 14 generator Angle Controls the Phase Angle of any installed voltage V1 V2 V3 V4 or current 11 12 13 14 generator 128 Freq Timer Start on Frequency No of Repetitions Op Time Duration The Prefault button The Fault button The Postfault button Controls the Frequency of any installed voltage V1 V2 V3 V4 or current 11 12 13 14 generator Timer Start Contact selection will start the timer when the first start contact results in a true condition and the timer will stop and the generators will turn off when the first stop contact results in a true condition The Timer Start Auto selection will start the timer when the Start button is pressed and the timer will stop and the generators will turn off when the first stop contact results in a true condition This feature allows the ramping of the output frequency using the Hz Sec ramping function either down up or up down a fixed number of times This is a powerful tool when testing outputs from frequency stabilizers which require repetitive frequency ramping The default setting Is 1 The Op operating trip time will display the time from initiation of the timer to the time when the first stop post results in a true condition A Duration time can be selected for each Prefault Fault and Postfault state
19. 11 of 4 167 Amperes at an angle of 0 12 will be 4 167 at 120 120 and 13 will be 4 167 Amperes at an angle of 240 120 Note that the current is rounded up to 7 in the last digit displayed When the test is Started the measured voltage and current outputs are displayed and the calculated Watts is based on the measured voltage and current outputs This is the value that gets displayed in the Transducer Test Screen under the MPRT Output next to the Label of Watt 3 Element Another value of Watts gets calculated using the measured dc Volts or dc milliampere output as displayed in the Transducer Output section Let us assume that in our example transducer the output is in dc milliamperes In this example let 20 milliamps of dc current be equal to the full scale output of 1500 Watts For this example let s say that the measured output voltages are 120 01 Volts V1 V2 and V3 and the measured output currents are 4 167 Amperes The measured output Watts would be 149 120 01 4 167 0 120 01 4 167 COS 0 120 01 4 167 COS 0 or 500 0816 500 0816 500 0816 1500 24 Watts For this example let s assume the measured output current from the transducer is 20 2 mA dc Based on a Max value of 20 mA equals 1500 Watts the displayed Watts in the Transducer Output section of the Transducer Test Screen should read 1515 0 Watts The Accuracy displayed in the Transducer Output section would be equal to the following 151
20. 8 Single Phase Applications As previuously described transducers come in three phase and single phase configurations In the Transducer Setting Screen the operator is required to select what type of transducer is to be tested Once selected the internal firmware of the MPRT unit will make certain assumptions and calculations based on the type of transducer selected The following are detailed descriptions of the single phase AC Volts AC Current DC Volts DC Current and Frequency transducers 3 8 10 8 1 AC and DC Voltage Transducers The single phase AC and DC voltage transducer requires 1 voltage output channel to test The MPRT will automatically select the first voltage channel available V1 The test will initially start at the default value voltage that is set in the Default Setting Screen For example 120 Volts L N When the user inputs the MAX Volts value in the Transducer Setting Screen the firmware can set the required test voltage for full scale value Note to power up the amplifier of some transducers V2 may be selected to provide the AC voltage source Remember to select the proper output voltage for V2 it will default to the MAX value in the setting screen If V2 is not available use another appropriate source Example The default voltage is 120 00 Volts AC and the user inputs 150 Volts AC as Max Value When the user inputs 150 Volts in the MAX value window in the Test Screen the test set should automatically show a te
21. E CH 0 000 60 000 Watts 3 Element 0 0000 Transducer Output Voltage 0 0000 Ydc Accuracy 0 5000 Watts 0 0000 Setting Screen Figure 99 Transducer Test Screen With all the values entered in the Transducer Setting Screen the operator will press the Test Screen button at the bottom of the screen The next screen to appear will be the Transducer Test Screen The Transducer Test Screen has three parts The MPRT Output section the Transducer Output section and the Vector Section 3 8 10 5 1 MPRT Output Section The operator can select which outputs to turn on off or value to be changed or incremented When selecting the type of transducer to test in the Setting Screen the appropriate outputs will automarically be selected for the user For example if an AC Voltage or Current transducer had been selected the V1 or I1 outputs will have changed from grey to green and the defaulted voltage or current would appear The default frequency will also be preset If a DC transducer had been selected the Freq Window for the selected voltage or current would read DC In the example above a 3 Element Watt transducer was selected in the Setting Screen and the user has set 180 degrees in the System Default setting screen In this case let s say the user has already changed the phase angle of the currents to lag their respective voltages by 30 degrees The actual measured output three phase Watts is displayed as 1299 35 This value will be used
22. External Clock The external clock has separate input and output connections The Clock In is used in conjunction with a Clock Out from another unit or other clock source for multiple unit operations or other special test applications The Clock Out provides a 24 KHz clock signal to another unit that phase locks these units together 9 External Trigger The External Trigger has separate input and output connections They enable the unit to sync with another unit or TTL 5Vdc signal source such as a GPS satellite receiver The Trigger In is used in conjunction with another unit to establish a trigger for a special operation or programmed event Typically the Trigger In synchronizes to the Trigger Out unit and acts as a slave to it The Trigger Out provides a TTL digital signal to another unit in order to synchronize a multiple unit operation when it needs to establish a trigger for a special operation or programmed event The TTL signal and pulse width for the GPS receiver is Voltage Input Signal 3V peak minimum Pulse Width 50uS nominal 10 PRINTER Interface Port For future use not used at this time Voltage Current Modules or V I Gen There are four available slots for the Voltage Current Amplifier Modules The slots are numbered from right to left with the back of the unit facing you Looking at the back of the unit the rightmost slot equates to Phase A the second slot from the right equates to Phase B the third slot from the
23. File Pre set Tests Main Menu Menu Figure 85 Reclosing Relay Menu Screen Connect relays trip contacts to BINARY INPUT 1 and the reclosing contacts to the Timer BINARY INPUT 2 Connect the desired BINARY OUTPUT contacts to the relays breaker sensing input 52B and or 52A Contacts Later in the Relay Specifications Screen set the BINARY OUTPUT 1 for Normally Closed and BINARY OUTPUT 2 for Normally Open using the Timer Setup button Initially the 52A contacts are open and 52B contacts are closed when the breaker is closed During the test the BINARY OUTPUT contacts will be toggled to simulate the breaker opening When the test set senses the reclosing contacts on the BINARY INPUT 2 the BINARY OUTPUT contacts will toggle to simulate the breaker reclose and will be repeated as programmed in the Relay Specifications Screen Connect l1 output terminals to the appropriate relay current input terminals Some of the distribution relays show a three phase voltage input requirement Most of these relays can be fooled by using a single phase voltage output in parallel with all three relay voltage inputs If it is desired to use a single phase voltage connect V1 output terminals in parallel to the relay voltage input terminals In the Relay Specifications Screen touch the Voltage window and enter the desired voltage value Press the down arrow and select either single phase AC or DC If three phase voltage is required connect V1 V2 and
24. MPRT to the input of the appropriate DMM or Power Multimeter From Main Menu press the Manual Tests display button Press the Voltage Current button Using TVI select a voltage output channel by pressing either V1 V2 V3 or V4 Note The unit is modular and may not have four output modules installed For example selecting V4 when there is not a A output module will 164 result in an error message to the user that the 4 voltage channel is not in place or operating To set an output value press the Magnitude window and enter the desired value Set the output to the desired voltage as listed in the following Table and initiate the output by pressing the Start button The selected output indicator will change from Green to Red UUT output will be displayed on Touch View Interface TVI Repeat for all ranges and values listed in the Table Note a minor adjustment in the metered output voltage maybe required in order to achieve the desired test voltage With the output on touch the Magnitude window and it should change color to Red Using the Control Knob adjust the output voltage to get the desired output voltage One click on the Control Knob is approximately 0 01 Volts Table 4 AC Volts Output Test Values as E Voltage i A Range UUT MIN MAX 20 1 eor 3 08 GE er 14 97 15 03 o 130 101 29 97 30 03 150V 75 0 20 1 74 85 75 15 150 0 0 1 149 85 150 15 300V 300 0 40 1 299 7 300 3 To test DC Voltage accuracy
25. Main Menu This selection will return the controller to the Main Menu 3 8 4 1 Differential Relay Setting Screen Differential Relay Settings Test Frequency 60 Hz Winding 1 Tap Winding 2 Tap Winding 3 Tap Winding 4 Tap Min Pickup of Tap Harmonic Order of Harmonic Slope Restraint Relay Type Polarizing Through Fautt 1 Target Tap Relay Model inst Tap D Test Config Figure 50 Differential Relay Setting Screen The Differential setting screen requires some values to be entered or verified before performing the test The factory defaults may be used to test a relay generically The following is a description of the buttons of the Relay Settings screen Winding Tap The user enters the tap value for each of the relay windings Default value is 5 0 Amperes Min Pickup Tap The user enters the relay minimum percentage of tap where the relay will operate Default 30 Therefore with a tap value of 5 amperes the minimum pickup value for the relay on any tap would be 1 5 Amperes 30 of tap Harmonic The user enters the of harmonic restraint the relay is set to The default value is 20 71 Order of Harmonic The user enters the order of harmonic restraint that the relay is set for For example a second harmonic restraint would be set to 2 third harmonic 3 and fifth harmonic 5 The default value is 2 Enter the slope of the relay For example a 30 slope enter value Enter the des
26. No data may be entered in this screen voltage Timing Test Test Frequency 60 Hz Figure 63 Voltage Relay Timing Test Screen e The Timing Settings button will change screens and will allow changes to meet the manufacturer specifications e The Pickup Settings button will change screens and will allow changes to meet the manufacturer s specifications e A timing error calculation must be performed based on the actual trip time versus the theoretical time from the time curve algorithms or from the definite time window DE E Time Theoretical Time 100 Theoretical Time The bottom of the screen has common buttons File This selection will take the user to the File Manager Batt Sim Off Batt Sim On This selection will turn the Battery Simulator On and Off Test Menu This selection will return the controller to the Test Menu Screen Main Menu This selection will return the controller to the Main Menu Sc Start Stop This selection will apply the set quantities displayed and begin the test After Start is pressed this button will turn red and display Stop Pressing Stop at any time will stop the test and turn the outputs off 3 8 6 Synchronous Relay Test Menu This menu permits the setting and testing of a synchronous relay These tests should be conducted in accordance with the manufacturers relay specifications Synchronous Test Menu Test Frequency 60 Hz Timing Figure 64 Synchronous Relay Test Menu
27. Tests Main Menu Menu Figure 40 Overcurrent Relay Test Menu Screen These tests should be conducted in accordance with the manufacturers relay specifications The bottom of the screen has common buttons File This selection will take the user to the File Manager Pre set Test Menu This selection will return the controller to the Pre set Test Menu Screen Main Menu This selection will return the controller to the Main Menu 62 3 8 3 1 Over Current Relay Setting Screen Overcurrent Relay Settings fest Frequency 60 Hz Relay Tap Time Dial Reset Time Inst Tap Target Tap Curve Type Curve Shape Relay Phase Relay Type IEEE ANSI Very Inverse i A Mechanical Test Multiple A Test Multiple B Test Multiple C 4 000 vo Theo Trip Time A Theo Trip Time B Theo Trip Time C Test Config File Test Main Menu Menu Figure 41 Overcurrent Relay Setting Screen e The Timing button will change screens and will allow changes to meet the manufacturer specifications e The Instantaneous button will change screens and will allow changes to meet the manufacturer s specifications e The Target Seal In button will change screens and will allow changes to meet the manufacturer s specifications e The Pickup button will change screens and will allow changes to meet the manufacturer s specifications e Relay Tap Time Dial Instantaneous Tap Reset Time Target Tap IEEE IEC curve type and
28. This selection will turn the Battery Simulator On and Off Test Menu This selection will return the controller to the Test Menu Screen Main Menu This selection will return the controller to the Main Menu Start Stop This selection will apply the set quantities displayed and begin the test After Start is pressed this button will turn red and display Stop Pressing Stop at any time will stop the test and turn the outputs off 105 3 8 8 3 Reclose Relay Timing Test Results This screen displays the results upon test completion No data may be entered in this screen Reclose Timing Test settings Test Frequency 60 Hz Relay Settings Trip Time 0 0000 0 0000 Reclose Time 00000 000000 3 Trip Time 0 0000 0 0000 Reclose Time 0 0000 Figure 77 Reclose Relay Timing Test Screen The bottom of the screen has common buttons File This selection will take the user to the File Manager Batt Sim Off Batt Sim On This selection will turn the Battery Simulator On and Off Test Menu This selection will return the controller to the Test Menu Screen Main Menu This selection will return the controller to the Main Menu Start Stop This selection will apply the set quantities displayed and begin the test After Start is pressed this button will turn red and display Stop Pressing Stop at any time will stop the test and turn the outputs off 106 3 8 8 3 1 Testing Reclosing Relays Theory of Operation The
29. V3 output terminals to the appropriate relay input terminals Using the down arrow select 3 The output voltage entered in the window will be applied with each voltage separated by 120 degrees V2 lags V1 by 120 degrees and V3 lags V1 by 240 degrees 144 Note lf relay is solid state or microprocessor based and requires a DC logic voltage prior to applying test connect the relay dc power terminals to the BATTERY SIMULATOR terminals The Battery Simulator voltage may be set and turned on in the Relay Test Screen 9 Select Relay Settings The following screen should appear Enter the Relay Tap and Time Dial values Enter the desired Test Multiple the multiplier used to determine the test current to applied to the relay i e Test Multiple Relay Tap Test Current Set the No of Operations Unlike the standard reclosing relay the distribution relay will trip the breaker sensed on BINARY INPUT 1 to toggle the BINARY OUTPUT contacts Note if the reclosing relay is a three shot to lockout then set the number of operations to 4 Set Reclose Ops Shot Count to the desired value the number of reclose operations that the relay is set for A maximum of 9 reclose operations shots may be recorded Reclose Relay Settings Test Frequency 60 Hz Relay Tap Test Multiple Faulted Phase Delay Time L i No of Ops Voltage Reclose Ops Brk Time Figure 86 Reclosing Relay Setting Screen 10 11 12 13 Press
30. VI Gen module After reseating the output module and reinstalling the cooling fan assembly reconnect the power cord and power up the unit Manually turn outputs on and check for proper output If output does not change peer through the air intake slots on the top to observe the Vl Gen LED s Each module has some LED s that stay on continuously and some that blink If there are no blinking LED s on one or more modules then the module is not communicating with the operating system Replace the Vl Gen Module DC voltage output with amplifier turned off It is normal to have a few millivolts of dc voltage with the output switched off since the amplifier is dc coupled However if the power supply starts to fail the operator may measure 10 s of volts dc across the output binding post This is an indication that the power supply has a problem and needs to be replaced Contact factory for return instructions Removal of Voltage Current VI Gen Amplifier Module Note Before removing the Vl Gen module with the unit powered up use the TVI and press the System Config button then press the About button Write down the Software Version numbers and Serial Numbers of the associated V I Gen s you will need this information later To remove the module from the chassis A Disconnect the power cord from the unit B Carefully remove the cooling fan assembly located in the back of the unit Note two captive screws at the lower bottom are fla
31. a default value set for 0 Amps and provides the selectable setup values for the current The selectable currents are 0 1 and 5 amps phase to neutral This will also be the value used in the prefault settings screen as well some other preset test screens These settings will change once the values are changed by the user in the relay settings screen 2 2 3 14 Default Voltage Output The Default Voltage output provides a default value set for O volts and provides the selectable setup values for the voltage These settings can be changed by the user in the relay settings screen Press the Default Voltage button and a list of popular phase to neutral values will be provided to choose from This is a big time saver when testing three phase relays the user does not have to enter each individual voltage value they will already be preset ready to use Select one of 0 0 Volts N 100 0 Volts 57 735 Volts 110 0 Volts 63 51 Volts 120 0 Volts 69 26 Volts Figure 17 Default Voltage Setting Screen 26 2 2 4 File Management The file management display is used by the TVI to access files stored on the unit s internal memory This display will allow test files to be loaded make or change directories rename files and directories delete files and directories that were created by the customer Figure 18 File Manager Screen The display is divided into two parts the upper half is used to define the user action and the low
32. a default voltage setting of 120 volts V1 will be set to 120 Volts at an angle of 0 and V3 will be 120 Volts at 300 delta connected PT s This assumes that the default phase angle is O 360 Degrees lag and not 180 degrees If the 180 degree phase angle option is used then V3 will be at 60 11 and 13 will be phase shifted 30 with their respective voltages or 11 at 30 lag and 13 at 270 lag or 90 When the user inputs the MAX Watts value in the Transducer Setting Screen the firmware can calculate the required test currents for full scale value The formula required to calculate Watts for 2 Element transducer is v1 V3 11 COS 30 V3 V3 13 COS 30 Total Watts Where Y is the incremental angular change between V1 and I1 and V3 and 3 Example The default voltage is 120 00 Volts AC and the user inputs 1000 Watts as Max Value The current required for full scale output from the transducer is 120 V3 11 COS 30 120 V3 13 COS 30 1000 Watts 11 500 Watts 120 Volts V3 COS 30 or 11 500 180 00 Since l1 13 then 11 and 13 will be 2 7777 Amperes each 145 Therefore when the user inputs 1000 Watts in the MAX value window in the Test Screen the test set should automatically show a test current value for 11 of 2 777 Amperes at an angle of 30 and 13 will be 2 777 Amperes at an angle of 270 90 When the test is Started the measured voltage and current
33. a definite time test The bottom of the screen has common buttons File This selection will take the user to the File Manager Test Menu This selection will return the controller to the Test Menu Screen Main Menu This selection will return the controller to the Main Menu 3 8 5 2 Voltage Relay Pickup Test Results This screen displays the results upon test completion No data may be entered in this screen Voltage Pickup Test Test Frequency 60 Hz Relay Settings Target amp Seal In FREQUENCY Timer Mon C N O Latch Off Open Setup T3 Figure 61 Voltage Relay Pickup Test Screen e The Timing Settings button will change screens and will allow changes to meet the manufacturer specifications e The Target amp Seal In Settings button will change screens and will allow changes to meet the manufacturer s specifications e Tocalculate the percent error of the pickup values by comparing Pick Up Voltage with the Relay Tag value error The bottom of the screen has common buttons File Batt Sim Off Batt Sim On Test Menu Main Menu Start Stop Pick Up Voltage Relay Tap 100 Relay Tap This selection will take the user to the File Manager This selection will turn the Battery Simulator On and Off This selection will return the controller to the Test Menu Screen This selection will return the controller to the Main Menu This selection will apply the set quantities displayed and begin
34. a higher order harmonic signal based on settings Both channels selected l and Is should be wired out in parallel at the relay side After the test is completed the currents amplitude will be read out from the screen or stored in the memory 76 3 8 4 4 Differential Relay Slope Test Results This screen displays the results upon test completion No data may be entered in this screen Differential Slope Test Settings Test Frequency 60 Hz Mag Amps ra A Z Frequency Hz Es En ES q ER En 000 D E a Stop Setup T3 Se File Ka Figure 54 Differential Relay Slope Test Timer Monti NO Latch Ofi Test Main Menu Menu The bottom of the screen has common buttons File This selection will take the user to the File Manager Batt Sim Off Batt Sim On This selection will turn the Battery Simulator On and Off Test Menu This selection will return the controller to the Test Menu Screen Main Menu This selection will return the controller to the Main Menu Start Stop This selection will apply the set quantities displayed and begin the test After Start is pressed this button will turn red and display Stop Pressing Stop at any time will stop the test and turn the outputs off A timer setup link is available on this screen Also the Timer Setup configuration is displayed for convenience The status of the relay contact will be displayed on the screen real time along with the value of
35. a soft reboot for the unit and restores the unit to its normal Power On state The reset will clear all values entered into various screens The data should be saved before performing a reset if possible 4 Binary Outputs there are 6 internal to the MPRT Unit Each output can be configured as Normally Open or Normally Closed contacts providing logic to the device under test The output can switch up to 300 VAC or 250 VDC with 1 Amp continuous The programmable wait duration is from 1 millisecond to 10 000 milliseconds 5 Battery Simulator the output voltages are 24 48 125 and 250 Volts DC with current limiting output power protection If a voltage is powered ON that respective voltage will have a lighted value 6 Measurement DC IN the DC IN will allow measurements up to 10 Volts DC or 20 milliamps of current 7 Binary Inputs there are 10 internal to the MPRT unit The input will accept a voltage range of 5 to 300 VAC or 5 to 250 VDC or dry Normally Open Normally Closed contacts 8 Three Phase Power Indication the three phases are noted by the red yellow and blue color boxes surrounding each output Phase A V1 4 11 is denoted by the red color 11 Phase B V2 amp 12 is denoted by the yellow color and Phase C V3 amp 13 is denoted by the blue color An optional fourth output module is denoted by the black color box With a fourth output module installed there may be up to four phases of voltage a
36. and enter the transducer s settling or response time in milliseconds 5 Press the Test Screen button at the bottom of the screen 6 Based on the type of transducer selected the appropriate outputs will have already been pre selected for you The outputs selected will be green in color indicating the off state In the case of Watt VAR or VA transducers the angles have already been preset If you desire to test at some other value s than those preset press the window for the value s you wish to change and a numeric keypad will appear Using the keypad enter the desired value s 7 Connect the selected outputs to the appropriate transducer s input terminals 8 Ifthe transducer requires an external power source for the AUX Power input connect your external power source at this time 9 Press the Start button at the bottom of the screen The outputs will turn on To vary amplitudes press the window s of the voltage s or current s which you desire to change When the numeric keypad appears select Ramp and then Enter for each output Then rotate the control knob to ramp the desired output values 10 Note the test result in the Transducer Output section of the window 140 3 8 10 6 1 Saving Results 1 With the test completed the results and test file need to be saved to the internal solid state disk To do this press the File button at the bottom of the window This will take the user to the Save Read window 2 Press the
37. change from Green to Red UUT output will be displayed on Touch View Interface TVI Note To adjust current touch the Magnitude window and it should change color to Red Using the Control Knob adjust the output current One click on the Control Knob is approximately 0 001 Amperes Table 6 AC Current Test Values Cem SE Current Output Range UUT ww MA _ 0ma Jong 062 st oe RIE TR A Ot _ 5994 6006 1504 075 01 5 53535 317485 7515 SOSA 01 14 985 15015 3000 300 01 2997 3003 _ To test DC Current accuracy change the output frequency to DC by pressing the Freq button for the appropriate output channel Enter 0 for the frequency and the Freq window will change to DC Set the output to the desired current as listed in the following Table and initiate the output by pressing the Start button The selected output indicator will change from Green to Red UUT output will be displayed on Touch View Interface TVI Repeat for all ranges and values listed Table 7 DC Current Test Values Output Output Current Output Range Setting Tolerance UUT MIN MAX AA ins 2o 3 02 80 a Je 6 020 15 0A 0 25 7 4625 7 5375 TOT 40 25 149625 15 0375 30 0A 0 25 29 926 30 075 6 4 5 Checking AC Current Convertible Channel Connect the current output of the MPRT to the appropriate DMM or Power Multimeter From TVI Main Menu select System Config button From System Configu
38. change the output frequency to DC by pressing the Freq button for the appropriate output channel Enter 0 for the frequency and the Freq window will change to DC To set an output value press the Magnitude window Set the output to the desired voltage as listed in the following Table and initiate the output by pressing the Start button The selected output indicator will change from Green to Red UUT output will be displayed on Touch View Interface TVI Repeat for all ranges and values listed Table 5 DC Volts Output Test Values DC Volts Measured Output Output Voltage Output Range Setting Tolerance UUT ETA E J 5 e E O EE LS 15 075 1300 025 299235 30 075 150V 0 25 P 74 625 75 375 PL 450 0 0 25 Z 149 625 150 375 300V 300 0 0 25 P 299 25 300 75 6 4 4 Checking AC Amperes DC Amperes Connect the current output of the MPRT to the appropriate DMM or Power Multimeter for DC current connect to the appropriate shunt to the DMM From Main Menu press the Manual Tests display button Press the Voltage Current button Using TVI select a current output channel by pressing either 11 12 13 or 14 Note The unit is modular and may not have four output modules installed To set an output value press the Magnitude window and enter the desired value Set the output to the desired current as listed in the following Table and initiate the output by pressing the Start button The selected output 165 indicator will
39. dc current This value is used when conducting the Target and Seal in tests on electromechanical relays 1 2 2 6 Test Multiple A numerical value normally associated with conducting timing tests Multiples are normally expressed in terms of 2 3 4 etc times the Relay Tap or Pickup value of the relay under test If only one Test Multiple is entered then only one timing test point will be conducted If two or three multiples are entered then the test system will wait the Reset Time before applying the next Test Multiple 1 2 2 7 Reach A numerical value expressed in Ohms This value is used to determine the distance in Ohms that the relay under test sees either into the transmission line or a generator 1 2 2 8 Torque A numerical value expressed in degrees A value used in impedance relays to define the maximum torque angle or line angle setting of the relay under test 1 2 2 9 Operate Op or Trip Time A numerical value which expresses the operating time of the relay under test Normally used to specify a definite operating time for a given fault value 16 1 2 2 10 Winding 1 2 3 4 Tap A numerical value associated with the Winding Number i e 1 2 3 4 etc of a transformer differential relay Used to define the tap setting value and test for each winding 1 2 2 11 Slope A numerical value which establishes the operating characteristic of a differential relay The operating characteristic of
40. fault timer will start at the beginning of the ramp and will not wait for the set point Delta 2 is the post fault ramp and is the change in frequency divided by time Hz S 42 3 5 6 Auto Synchronizing Two voltage output modules are required to perform tests on synchronizing type relays To perform Pick Up or Closing Angle tests voltage channel one V4 will be referenced at 0 and allow the second voltage channel V2 to provide the variable phase angle adjustment Remember the phase angle indicated on V will be a lagging angle If the relay s closing characteristic is 20 leading set an angle of 340 on voltage channel 2 Breaker Contacts Close 0 Increase Phase of V2 Relay Contacts Close 90 a ee eee on 180 Auto Synchronizing Relay 3 5 7 Pickup The pickup test performs a Ramp or Pulse Ramp see 3 5 1 for description of Pulse Ramp Using the Ramp function the relay is first energized using two times the Tap or Pickup value After the relay contacts close the outputs are set to 90 of the Pickup value The output is increased until the relay trips Once the relay trips the test stops and the output is recorded st 4H JF Relay Contacts lt 2 X pickup Value lt Pickup Value y U a 2 E lt q Increment Time in Cycles Pickup Test 43 3 5 8 Seal In Target The Seal In test is performed using DC output current An AC output current may be applied on over current relays to clo
41. firmware would compare the accuracy values between the Setting Screen and the Test Screen and would display PASS in the Transducer Output section of the test screen If the user adjusts the phase angle in the lagging direction by 30 then the Watts output changes Using the formula V1 11 COS V3 1I3 COS Y V1 12 COS 60 V3 l2 COS 60 Total Watts Where Y is the incremental angular change of 30 between V1 and l1 and V3 and 3 etc then 120 4 1667 COS 30 120 4 1667 COS 30 120 4 1667 COS 60 30 120 4 1667 COS 60 30 1299 05 Total Watts Note All of the calculations are very similar when testing VAR 2 1 2 Element transducers The primary difference is replacing the COS function with the SIN function For the example above 120 4 1667 SIN 30 120 4 1667 SIN 30 120 4 1667 SIN 60 30 120 4 1667 SIN 60 30 1250 01 VAR s 148 Note All of the calculations are very similar when testing VA 2 1 2 Element transducers The primary difference is no COS or SIN functions For the example above 120 4 167 120 4 167 120 4 167 1500 12 VA 3 8 10 7 6 Watt VAR 3 Element This transducer is normally used in three phase four wire Wye applications which requires 3 voltages and 3 currents to test The three voltages and three currents are all refernced to ground The MPRT will automatically select three voltage and thre
42. has elapsed If the Reclose Duration is something other than zero the Reclose Timer will start when the unit progresses from the Fault to the BKR Trip condition and will stop when the first stop contact reaches a true condition or when the BRK Trip Duration has elapsed If the Dynamic Disabled selection is displayed the system will not progress through the Pre Fault Fault BKR Trip Reclose operations A Duration time can be selected for each Pre Fault Fault BKR Trip and Reclose state IF the Duration time is set for zero the unit will skip that state If the Duration time for Reclose is set to zero the Reclose Time will not be displayed This selection will take the user to the File Manager This selection will turn the Battery Simulator On and Off This selection will return the controller to the Manual Test Menu This selection will return the controller to the Main Menu This selection will apply the set quantities displayed and start the timer or not start the 126 Timer Setup Trip Time Reclose Time The Prefault Settings The Fault Settings The Breaker Trip Settings The Reclose Settings timer depending upon Timer Start selection If the Dynamic Enabled button is selected the unit will progress through the Pre Fault Fault BKR Open and Reclose operations The Start button will always reset the timer to zero After Start is pressed this button will turn red and display Stop Pressing Stop at
43. in the Fault or Fault and Reclose conditions Controls V1 V4 8 11 14 Permits control of any installed voltage V1 V2 V3 V4 or current 11 12 13 14 generator Mag Controls the Magnitude of any installed voltage V1 V2 V3 V4 or current 11 12 13 14 generator 125 Angle Freq Timer Start Contact Timer Start Auto Dynamic Enabled Dynamic Disabled Duration File MGR Batt Sim Off Batt Sim On Manual Test Menu Main Menu Start Stop Controls the Phase Angle of any installed voltage V1 V2 V3 V4 or current 11 12 13 14 generator Controls the Frequency of any installed voltage V1 V2 V3 V4 or current 11 12 13 14 generator Timer Start Contact selection will start the timer when the first start contact results in a true condition and the timer will stop and the generators will turn off when the first stop contact results in a true condition The Timer Start Auto selection will start the timer when the Start button is pressed and the timer will stop and the generators will turn off when the first stop contact results in a true condition The Dynamic Enabled button will simulate four state conditions Pre Fault Fault BKR Trip and Reclose and progress through each state condition The Timer will start when the unit progresses from the Pre Fault to the Fault condition and will stop when the first stop contact reaches a true condition or when the Fault Duration
44. it should be noted that if the operator chooses Waitt VAR or VA in the Select Transducer Type window a Full Scale current will automatically be calculated and entered for you The value will be calculated based on the defaulted VOLTAGE value and the Max Watts VAR or VA value entered in the Transducer Output section The current may be increased or decreased from this value in the Transducer Test Screen Settling Time This is the time delay in milliseconds the MPRT will wait before making it s first accuracy calculation and freeze the readings If the transducer is self energized the operator needs to allow enough time for the transducer to stabilize before making an accuracy calculation If the transducer needs warmup time prior to testing the operator needs to account for this time too On the other hand if the transducer is already warmed and is powered up then the operator only needs to allow for the settling time of the transducer For example assume the transducer settling time is 1 second then the operator needs to enter a settling time of 1 000 milliseconds When the test values are applied the system will wait 1 000 milliseconds before calculating the error deviation Then the error with pass fail information is displayed and the test values are frozen At this point the operator may choose to Stop the test and Save results 136 3 8 10 4 4 Transducer Output Section Min and Max The tranducer will have either a dc voltag
45. later to calculate error and PASS TEST FAILED 139 3 8 10 5 2 Transducer Output Section Watts 3 Element Transducer Output Current 0 8670 mAdc Accuracy 0 0487 o Watts 1299 35 The transducer output section displays either the dc output Volts or milliamperes In addition it also displays the equivalent output in the select type value In our example we see the measured value of 0 8670 mA dc and a calculated value of 1300 0 Watts This calculated value is compared to the actual measured value in the MPRT Output section The accuracy is then calculated and displayed The accuracy is calculated as follows ES 0 2 x 100 MPRT Output If the value displayed in the Accuracy window meets the Accuracy specification set in the Transducer Setting Screen an affirnative PASS will be displayed If it exceeds the setting specifications a negative TEST FAILED in red letters will appear Note the PASS or TEST FAILED is delayed by the settling time value in the setting screen 3 8 10 6 Testing Transducers 1 Inthe Transducer Setting Screen enter the transducers specific data such as manufacturer model number and serial number 2 Select the transducer type to be tested 3 Enter the transducer s output in dc volts or milliamperes Include the min and max values for the type of output which correlates to the voltage or current Input the transducer s accuracy value 4 Adjust the system default settings if required
46. of Currents with Common Grounded Returns Figure 23 Series of Two Current Channels D NOTE One current channel should be set to O degrees and the other current channel should be set to a phase angle of 180 degrees so that the two compliance voltages add across the load DO NOT attempt to series more than two currents together The two current channels that are to be used in series set each to the same test current magnitude Initiate the two current channels simultaneously by pressing the Start button All current channels have amplitude control now operates simultaneously to provide the desired test current Selecting Ramp of the two current Magnitudes will allow the user to ramp the two 32 currents at the same time using the Control Knob The test current is the current shown on either of the current channels amplitude displays 3 3 3 Harmonic Restraint Test One V I Generator could be used to do differential or harmonic restraint tests when the voltage channel is converted to a current source This is useful when the unit only has one V I Generator and if the required operating current doesn t exceed 5 amperes and the restraint current doesn t exceed 15 amperes Model MPRT 8415 or 30 amperes Model MPRT 8430 Two V I Generator current channels may be used to obtain the desired current output to conduct harmonic restraint tests on differential relays One of the current channels provides the second or higher harmonic output and
47. outputs are displayed and the calculated Watts is based on the measured voltage and current outputs This is the value that gets displayed in the Transducer Test Screen under the MPRT Output next to the Label of Watt 2 Element Another value of Watts gets calculated using the measured dc Volts or dc milliampere output as displayed in the Transducer Output section Let us assume that in our example transducer the output is in dc milliamperes In this example let 1 miiliampere of dc current be equal to the full scale output of 1000 Watts For this example let s say that the measured output voltages are 120 00 Volts V1 and V3 and the measured output currents are 2 793 Amperes The measured output Watts would be 120 00 V3 2 793 COS 30 120 00 V3 2 793 COS 30 1005 48 Watts For this example let s assume the measured output current from the transducer is 1 001 mA dc Based on a Max value of 1 mA equals 1000 Watts the displayed Watts in the Transducer Output section of the Transducer Test Screen should read 1000 1 001 1001 00 Watts The Accuracy displayed in the Transducer Output section would be equal to the following 1001 00 1005 48 1005 48 100 accuracy or 0 445 If this were a 0 5 transducer then the firmware would compare the accuracy values between the Setting Screen and the Test Screen and would display PASS in the Transducer Output section of the test screen If the user adjusts the phase an
48. post on any voltage output module to ground the load al 1 2 3 VE V Desired Fault Voltage V3 Va V 20 3 ij Vo gt V 4120 V e V 4240 Balanced 3 0 4 Wire Y Connection 39 3 5 Internal Software Test Profiles The test profiles are performed on the Relay Under Test to verify the relay is operating correctly The following describes the procedures to test a unit 3 5 1 Pulse Ramping The Pulse Ramping may be used to determine reach values for multi zone relays without defeating the zone timer elements The Pulse Time is set so that the test current is only on long enough for the selected zone to operate The following figure shows the current pulse generated by the test unit Amplitude Increment d Prefault gt A gt Pulse Time in milliseconds Time On Figure 25 Pulse Ramp Select the fault type from the several available fault types phase to ground phase to phase two phases to ground and three phase Hold the voltage or the current constant There are different available pre fault voltages to choose from The user may enter a different value if desired The pre fault current range is from 0 to 9 99 amps The test starts with a pre fault current voltage for the Pre fault Time Off delay to ensure the relay energizes polarize before starting the test The Pulse Time Off Delay Time is specified in milliseconds with the factory default value set at 1000 mSec 60 cycles at 60 Hz
49. relay energizes The generator output is set to the start value specified The generator holds the value for the specified Delay Time by the fault 40 calculator or you may enter a specific value Once the time has elapsed the generator output increments by the Increment value specified in the fault calculator or by the entered value The ramping continues until pickup is detected or the Stop value is reached Current Amps Pickup Current Time cycles Overcurrent pickup ramp technique When the test is complete the voltage magnitude and angle current and Reach percent error are calculated for the three phases One of the inputs is setup to monitor the relay s contacts When the first fault voltage is applied the timer starts and the relay stops when the relay trips 3 5 3 Angle of Torque The angle of torque test requires two phase ramps The first ramp is performed by incrementing the angle CW with the next ramp being incremented CCW The test will use these two measurements to calculate the angle of torque Measured CW Torque Calculated Angle of Torque Z1 Measured CCW Torque Angle of Torque 3 5 4 Step The step test is similar to the pulse ramp except the Step test only uses a single pulse The test steps from a normal relay setup into the fault condition and waits for the relay to respond The test energizes the relay with the pre fault values sets the output of the generators to the fault values an
50. requires 1 voltage and 1 current to test The MPRT will automatically select the first voltage and current channels available V1 and I1 The test will initially start at the default values for voltage and current that are set in the Default Setting Screen For example 120 Volts L N and 5 Amperes The Power factor transducer has a range of operation that correlates to the Leading or Lagging phase angle relationship between the voltage and current inputs Therefore when the user selects Power Factor 1 Element the MIN and MAX nomenclature will change to read LEAD and LAG power factor values The user is required to input the LEAD MIN and LAG MAX power factor values into the provided spaces normally the same values i e 0 5 The power factor is the trigonometric decimal equivalent value of the COS of the angle between the V1 voltage and l1 current For example when the user inputs the LEAD and LAG Power Factor values in the Transducer Setting Screen the firmware can calculate the required test angles for full scale values Thus for a LAG Power Factor value of 0 5 the current would need to lag the voltage by 60 The Lead and Lag phase angles require that the vector display be changed to show angles as 180 If the default angle representation is 0 to 360 LAG then the angle between the voltage and current will be considered lagging current lags voltage In this situation the typical test angles may vary between 0 to 90 degrees lag and 359
51. scale output from the transducer is 120 11 COS 0 500 Watts simplifing I1 500 120 or 11 4 1667 Amperes Therefore when the user inputs 500 Watts in the MAX value window in the Test Screen the test set should automatically show a test current value of 4 167 Amperes at an angle of 0 Note the voltage is also in phase with the current at 0 Also note that the current is rounded up to 7 in the last digit displayed When the test is Started the measured voltage and current outputs are displayed and the calculated Watts is based on the measured voltage and current outputs This is the value that gets displayed in the Transducer Test Screen under the MPRT Output next to the Label of Watt 1 Element Another value of Watts gets calculated using the measured dc Volts or dc milliampere output as displayed in the Transducer Output section Let us assume that in our example transducer the output is in dc milliamperes For this example let us say that 1 milliampere of dc current is equal to the full scale output of 500 Watts Therefore the theoretical output Watts from the transducer would be 500 Watts if the output current is 1 milliampere For this example let s say that the measured output voltage is 120 01 Volts at 0 and the measured output current is 4 166 Amperes at 0 0 The measured output Watts would be 120 01 4 166 COS 0 0 499 96 Watts 141 For this example let s assume the measured output current from t
52. set quantities displayed and begin the test After Start is pressed this button will turn red and display Stop Pressing Stop at any time will stop the test and turn the outputs off A link to Timer Setup configuration is be available on this screen Also the Timer 69 Setup configuration is displayed for convenience The user selects the appropriate number of channels required pressing l l and lz The amount of current required will be split proportionally between selected current channels After the test is completed the trip time for all multipliers the percentage error and current s amplitude will be read out from the screen or stored in the memory as can be seen in the figure below 5 999 0 000 0 000 _atch On Closed Figure 48 Overcurrent Timing Test Result Screen 3 8 4 Differential Relay Test Menu This menu permits the setting and testing of a differential relay These tests should be conducted in accordance with the manufacturers relay specifications Polarize Relay Figure 49 Differential Relay Test Menu Screen There are several options to further define the tests to be performed Selecting one of these options will present the test setup screen for that option Part 710000 Rev 3 Date 11 15 2005 The bottom of the screen has common buttons File This selection will take the user to the File Manager Pre set Test Menu This selection will return the controller to the Pre set Test Menu Screen
53. that fault frequency the Duration time needs to be slightly longer than the expected trip time of the relay under test 3 Set the desired TIMER Start Frequency If using a ramping frequency output when the output frequency ramps through the TIMER Start Frequency the TIMER will start If using a Step Function the TIMER Start Frequency must be equal to the FAULT Frequency 4 Select Postfault values by pressing the Postfault Settings button Set the desired Postfault Frequency using the touch screen and keypad This provides a go no go test for relays that should instantly reset once the frequency conditions postfault have stabilized to the prefault conditions Set a Duration Time long enough that the user can easily determine that the relay has reset properly 5 With the relay trip circuit connected to the appropriate binary input Timer STOP gate binding posts select the appropriate TIMER Stop gate using the Timer Setup screen Select the TIMER Start Stop LATCH ON both the START and STOP circuits NOTE Failure to LATCH circuits will result in timing error 6 The unit defaults to a frequency Step for dynamic timing tests For testing relays with multiple set points the user may want to use either Hz Sec or Ramp Hz Sec allows different ramp rates down up while the Ramp uses the same frequency rate of change for both ramps Set the Delta 1 rate of change Ramp Rate 1 For example if you wish to ramp the output frequency at 1 hertz pe
54. the current The calculated Start and Stop current can also be seen on the test screen The Stop current is the maximum current provided by the test set before test is stopped This instance is applicable if the relay does not operate when ramping the current up between the Start and Stop values For this test two current channels will be used to energize the two restraint coils of the relay After the test is completed the currents amplitude and the Actual Slope will be read out from the screen or stored in the memory 11 3 8 4 5 Differential Relay Seal In Test Results This screen displays the results upon test completion No data may be entered in this screen Differential Seal In Test Settings lest Frequency 60 Hz Ramp start NOTES TO OPERATOR Observe when contacts are closed and press Start Depress lhe Start key to energize the relay Start File Tesi Main Menu Meru Figure 55 Differential Seal in Test Screen The Timing Instantaneous and Pickup test screens may be entered to change test settings The bottom of the screen has common buttons File This selection will take the user to the File Manager Batt Sim Off Batt Sim On This selection will turn the Battery Simulator On and Off Test Menu This selection will return the controller to the Test Menu Screen Main Menu This selection will return the controller to the Main Menu Start Stop This selection will apply the set quantities displaye
55. the differential relay is a line with a slope defined by the ratio of the operating and restraint values 1 2 2 12 Harmonic A numerical value which establishes the percent of harmonic restraint for a harmonic restrained transformer differential relay This value will be used to determine Pass Fail during the Harmonic Restraint test 1 3 Touch View Interface TVI The Touch View Interface is the operator s interface for the manual operation of this unit Variable or value changes are performed by the touch panel keypad or by rotating the control knob after touching the display with your finger where the change is required See section 2 2 for operational details 1 4 Input Power and Control 1 4 1 Input Power The input voltage may be from 100 to 240 VAC 50 60 hertz Input current required varies with the number of output modules in use and load The maximum input power is 2100VA The input is protected by an ON OFF switch circuit breaker Model 84XX XXXXAX comes with a North American power cord part number 801046 Model 84XX XXXXEX comes with a Continental Europe power cord part number 15021 The 84XX XXXXIX comes with a standard International Color code power cord as shown below The cord part number 14525 is ready for wiring to the appropriate plug depending on country The following colors apply Brown Line Blue Neutral and Green Yellow Ground Figure 5 International Color Coded Power Cord 1 4 2 Control Secti
56. the relay plug setting or pickup value Time Dial This value is the time dial setting or the delay setting This value is also known as the time leaver setting Reset Time This value is the time it takes the relay to reset from a trip condition The value inserted in the reset time must exceed the reset time of the relay This is to insure that all timing tests will be correct 95 Normal Volt The Normal Volts is the desired test voltage per phase See Formula below for further description Target Tap This value is the target tap setting This value is either 0 2 A or 2 0 A Formula There are several formulas that comprise the Power Relay testing process as indicated below A o oe Voltage Current Cosine 0 Voltage Current Cosine 9 V3 V3 Voltage Current Cosine 0 3 Voltage Current Cosine 0 Voltages o2 Current Cosine 0 30 V3 Voltages o2 Current Cosine 0 V3 Voltageo os Current Cosine 8 30 v3 Voltages o Current Cosine 0 Voltage o2 Current Cosine 0 V3 Each formula represents different types and styles of relays and how they are connected to the power system The formula selected will be used to calculate the Watts displayed in the test screen Some are used with single phase relays for both Watt and VAR applications where the relay is calibrated in single phase Watts Some formulas represent other special applications where the relay is a single phase rel
57. the test After Start is pressed this button will turn red and display Stop Pressing Stop at any time will stop the test and turn the outputs off 85 3 8 5 3 Voltage Relay Target amp Seal In Test Results This screen displays the results upon test completion No data may be entered in this screen Voltage seal in Test Test Frequency 60 Hz MOTES TO OPERATOR Observe when contact are closed and press Stari Depress the Start key to energize the relay Stat Fie Test Main Menu Menu Figure 62 Voltage Relay Target and Seal In Screen e The Timing Settings button will change screens and will allow changes to meet the manufacturer specifications e The Pickup Settings button will change screens and will allow changes to meet the manufacturer s specifications The bottom of the screen has common buttons File This selection will take the user to the File Manager Batt Sim Off Batt Sim On This selection will turn the Battery Simulator On and Off Test Menu This selection will return the controller to the Test Menu Screen Main Menu This selection will return the controller to the Main Menu Start Stop This selection will apply the set quantities displayed and begin the test After Start is pressed this button will turn red and display Stop Pressing Stop at any time will stop the test and turn the outputs off 3 8 5 3 Voltage Relay Timing Test Results This screen displays the results upon test completion
58. the user to the File Manager Batt Sim Off Batt Sim On This selection will turn the Battery Simulator On and Off Test Menu This selection will return the controller to the Test Menu Screen Main Menu This selection will return the controller to the Main Menu Start Stop This selection will apply the set quantities displayed and begin the test After Start is Part 710000 Rev 3 Date 11 15 2005 pressed this button will turn red and display Stop Pressing Stop at any time will stop the test and turn the outputs off 3 8 4 8 Differential Relay Polarizing Test Results This screen displays the results upon test completion No data may be entered in this screen Differential Polarizing Test Settings lest Frequency 60 Hz Mag Amps Frequency Hz E E Te st Main Menu Menu Figure 58 Differential Polarizing Test Screen This test is suggested by some relay manufacturers Three currents channels in parallel will be used and there is no need for detecting a change in state of the relay contact Accordingly the test itself consists in applying a large amount of current for a very short time The bottom of the screen has common buttons File This selection will take the user to the File Manager Batt Sim Off Batt Sim On This selection will turn the Battery Simulator On and Off Test Menu This selection will return the controller to the Test Menu Screen Main Menu This selection will return the c
59. time and reduce costs MPRT was designed as a modular unit In most cases if any one module should experience a problem it should not cause the test system to be down Basic troubleshooting information has been provided to guide the technician to the possible source of a problem Most of the problems experienced with the MPRT can be corrected with a replacement module Since MPRT uses Surface Mount Technology most repairs of the individual modules are beyond the scope of the basic troubleshooting guide and should be referred to the Service Department at Megger or handled through the Megger Representative a If the unit is still within the original warranty period or limited warranty period following factory servicing the factory must be contacted before attempting any repairs or the warranty will be void 6 3 1 Basic Troubleshooting The troubleshooting information relies on the technician to have a through understanding of the operation of the unit If the technician is unfamiliar with the unit he or she should not attempt to repair The technician should contact the factory before attempting repairs Provide the Megger part number for the part or assembly in question and the serial number of the MPRT when making inquiries A WARNING lt is necessary to energize the MPRT to properly troubleshoot some of the modules The technician must take all applicable safety precautions for working on energized circuits NOTES Before suspecti
60. to the Timer Setup screen for selection and programming of the binary output contacts The MPRT will also need to have the Binary Input contacts programmed for sensing the relay Trip Contacts and the Reclose Contacts The purpose of the timing test is to measure the reclose times and sequence of operation to a lockout state for the reclosing relay For the trip reclose relays the MPRT needs to record both the trip and reclose times Reclose Only Relays For testing the reclose only relays the timing test involves simulating a fault tripping a breaker and measure the time for the reclosing relay to operate Upon initiating the test the test set will toggle the Binary Outputs 1 A contact and 2 B contact simulating the circuit breaker opening and start the timer running at the same time Upon sensing the relay reclose contacts closing defaulted to Binary Input terminal 2 stops the timer records T1 reclose time and after a preset time delay of 0 040 seconds simulates the closing time of the breaker toggles the Output Contacts back to the original start state breaker closed and resets the timer While recording and resetting the MPRT must continue to monitor the Timer Stop contacts looking for the reclosing relay contacts to change state open Once the reclose relay closing contacts have opened wait 0 040 seconds simulates breaker opening time and then repeat this process depending on the No of Operations defaulted to 4 selected i
61. upon test completion No data may be entered in this screen f Differential Winding 1 lest settings Test Frequency 60 Hz Mag Amps Angle Frequency Hz EA Ramp Figure 52 Differential Relay Winding 1 Pickup Test The bottom of the screen has common buttons File This selection will take the user to the File Manager Batt Sim Off Batt Sim On This selection will turn the Battery Simulator On and Off Test Menu This selection will return the controller to the Test Menu Screen Main Menu This selection will return the controller to the Main Menu Start Stop This selection will apply the set quantities displayed and begin the test After Start is pressed this button will turn red and display Stop Pressing Stop at any time will stop the test and turn the outputs off A timer setup link is available on this screen Also the Timer Setup configuration is displayed for convenience The status of the relay contact will be displayed on the screen real time along with the value of the current The calculated Start and Stop current can also be seen on the test screen The Stop current is the maximum current provided by the test set before test is stopped This instance is applicable if the relay does not operate when ramping the current up between the Start and Stop values After the test is completed the current amplitude will be read out from the screen or stored in the memory 19 3 8 4 3 Differential Relay Harmon
62. 0 025 6 5 Preparation for Reshipment H Save the original shipping container for future use The shipping container is designed to withstand the rigors of shipping via a common commercial carrier For example you may wish to reship your unit to Megger for an annual calibration recertification Pack the equipment appropriately to prevent damage during shipment If a reusable container is utilized the unit will be returned in the same shipping container if it is in suitable condition Add the Return Authorization Number to the address label of the shipping container for proper identification and quicker handling H NOTE Ship the equipment without nonessential items such as test leads etc These items are not needed by the factory to perform service 168
63. 000nnnnnnn000nnnnnnnosnnnnnnnnnnnnnnnnnrnnsrnnnrnneeosnnnnrrrerssnnnrrnrrensnnnneeno 25 2 2 3 12 System Freouency 26 2 2 3 13 Default Current Output 26 220 14 Default Voltage TEE 26 2124 Ale Management dedo ratico 27 2 2 4 1 ere Eessen eege lada es eege 27 2 2 4 2 ESTRES Sarandon toi 27 23 Communication POS iniciara oia rien 27 2 3 1 As2926 venal POM aida dai 28 232 IEBE 288 GPIB aura laa raid cesta dotada 28 2 Etherneti Base iia iio 28 a USB EE 28 2 39 5 PNET EO orae A aes cae eae oa 28 24 Emor REPO UN cuina a a Ee 28 2 5 Advanced Visual Test Software AVTS o oooccooonnccccccccocconccononcconnononcconononancnnnonnnnnnnns 28 3 0 OPERATING PROCEDURES wits ee ee ee 28 31 TOUCH Vekene 28 3 2 Setting Phase Angle Relationships 000000nnnnnn0000nnnnnnnnnennnnnnnnnnnnnnnnnensrnnnrnrnnnsennnrenene 29 33 CG rrent SOUL COS s corsa cs assent ic 31 3 3 1 Parallel ee le A A AR 31 33 2 Gurrenits In Seres Opera ON ill oia 32 333 E le ern Wetter testar coa 33 3 3 3 1 Basic Harmonic Restraint Test Procedure oooccccccccnococoncnncccnnnnconannnconononennnnnnnonanons 34 OA VOllage SOURCES ii E io a a ea ss dee dees A 35 3 4 1 Quiputs SUMIMe GT OG SUVS Fic idol license 35 S42 DYNAMIC Voltage Relay Osiris land iron lianas 35 3 4 3 30 3 Wire Open Delta and T Connechon 35 3 4 3 1 e NET EE 35 3 4 3 1 1 Voltage OUTOUT Connections asian disease ica 36 3 4 3 2 TFCONNECUON RE 37 3 4 4 30 A Wire G ONNCC
64. 2 1 Tap A numerical value associated with a tap setting on the relay Tap is normally associated with a value of current voltage frequency or watts Tap is used to define a setting value pick up value or minimum operating point of the relay under test 15 1 2 2 2 Time Dial A numerical value normally associated with a TIME CURVE or defines the use of a specific time curve from a family of curves Used when conducting a timing test The TIME DIAL number also may be used in a Time Curve algorithm in calculating the theoretical operating time of the relay under test 1 2 2 3 Instantaneous Inst Tap A numerical value associated with a tap setting on the instantaneous element of the relay Normally associated with a value of current or voltage Used to define a pick up value or minimum operating point of the instantaneous element of the relay under test 1 2 2 4 Reset Time Is a numerical value of time in seconds Normally associated with electromechanical relays this is the amount of time required for the operating disk to reset If multiple timing tests are conducted on a relay the test system will wait the Reset Time value prior to applying the next timing test Note if the Reset Time is too short and the disk does not completely reset then timing error will be introduced to the test Note that numerical relays also can have reset times to coordinate with electromechanical relays 1 2 2 5 Target Tap Is a numerical value of
65. 2 595 Cosine 30 30 180 Watts V3 where 0 is the lagging angle of the test current For our next example relay consider a three phase three wire relay that monitors phase to phase voltage and two phase currents For a balanced load condition the formula V3 Voltages oe Current Cosine 6 would be used to calculate Watts In this test case the manufacture recommends testing the relay using a single phase voltage and parallel the voltage to the relay potential sensing coils Also a single phase current is applied in series to the two current input terminals It should be noted that in using the manufacturer s recommended test procedure the relay is calibrated in three phase watts using 1 2 the pickup current corresponding to the relay pickup in watts using the previous stated formula Other three phase relays may also be tested using a single phase voltage and current source For example to test a three phase four wire phase neutral sensing relay using a single phase voltage and current source requires the use of the following formula to calculate three phase watts 3 Voltage Current Cosine 0 In this case the single phase voltage output is connected in parallel to all three potential sensing inputs on the relay and the single phase current is connected in series to all three current inputs The Voltage applied will be the phase to neutral voltage enter in the Normal Volt window The phase angle relationship recomme
66. 3891043 System Deliut Settings sranie a a EAR 136 38 10 4 4 EREECHEN 137 3 8 10 5 Manual Transducer Test Gcreen 139 Sot MPRT OUPS cciana eco 139 38 10 92 Transducer Outp r SECUN ar A N E 140 30 106 Tesung Fra osana i a a eN 140 381061 Savihg RESUS viscosa a a a adimacatacentene 141 3 8 10 7 Watt Var Va Power Factor Applicatons 141 9 90 10 falo Wal AR E E aaae a o eer eee 141 391072 Powetriraciori Element coito llei 142 SO10 7 3 WallvARd 12 RIEMEN EE 144 39 10974 WalVAR Z EE E EE 145 39 1079 WIWVAR EENEG ER 147 391070 WatUVAR 3 Element EE 149 0 10 77 FOW Factor Elemen E 151 3 8 10 8 Single Phase Applications 0000nnnn00nnnnonnennnnnnennnnnsennnnsrnrnnrosrnrnrnsenrrressnnrrersnnne 152 3 8 10 8 1 AC and DC Voltage Transducerg 152 3 8 10 8 2 AC and DC Current Troansducers 153 3 8 10 8 3 Frequency Transducers eneannneonennenesrenrneosrnreresrnrresrnrrreosrnrerrsrnrrrennnnrrernnnne 154 4 0 External High Current Ampltter 156 50 Warranty eege EES 156 60 SEET 157 6 1 Preventive Maintenance 157 6 1 1 TEE eege diia 157 6 2 MPRT Ethernet Port and IPhNetiworks 157 6 2 1 Setting MPRT IP Address Dialog Box 158 6 2 2 Updating MPRT Software Firmware ccccccccccccnnccnnnccccnnnonnccnnnnonononanncnnnnnonnnannennnnnnnnnnnans 158 6 3 Service and Repair Instructhons 159 6 3 1 Basic Troublesbootmg 159 6 3 1 2 POWER at 160 6 3 1 3 INDUL POWEF and COntOl mesura 160 6 3 1 4 Binary Inputs and Battery
67. 5 1500 24 1500 24 100 accuracy or 0 984 If this were a 0 5 transducer then the firmware would compare the accuracy values between the Setting Screen and the Test Screen and would display Test Failed in the Transducer Output section of the test screen If the user adjusts the phase angle in the lagging direction by 30 then the Watts output changes Using the formula V1 11 COS YD V2 12 COS V3 13 COS Y Total Watts Where Y is the incremental angular change of 30 between V1 and l1 V2 and 12 and V3 and l3 etc then 120 01 4 1666 COS 30 120 01 4 1666 COS 30 120 01 4 1666 COS 30 or 483 0418 433 0418 433 0418 1299 13 Watts Note All of the calculations are very similar when testing VAR 3 Element transducers The primary difference is replacing the COS function with the SIN function For the example above 120 01 4 1666 SIN 30 120 01 4 1666 SIN 30 120 01 4 1666 SIN 30 or 250 0168 250 0168 250 0168 750 05 VAR s Note All of the calculations are very similar when testing VA 3 Element transducers The primary difference is no COS or SIN functions For the example above 120 01 4 1666 120 01 4 1666 120 01 4 1666 1500 10 VA 150 3 8 10 7 7 Power Factor 3 Element The three element power factor transducer requires 3 voltages and 3 currents to test The MPRT will automatically select the first three voltages and currents chan
68. 9 to 270 degrees lag 90 degrees leading This could cause some confusion to the user By forcing the display to 180 simplifies the testing considerably The test will start at unity power factor or 0 Since the default 142 angle will be 0 zero degrees the calculation is simple The formula required to calculate Power Factor is COS 0 1 000 Power Factor V1 Z0 1120 Example The default voltage is 120 00 Volts and current is 5 Amperes AC and the user inputs a Power Factor of 0 3 as LEAD and LAG Values The angles required for full scale output from the transducer is 0 3 Power Factor COS 72 5 or 72 5 LEAD and 72 5 LAG When the test is Started the measured voltage and current outputs are displayed and the calculated Power Factor is based on the measured phase angle bewteen the voltage and current outputs This is the value that gets displayed in the Transducer Test Screen under the MPRT Output next to the Label of Power Factor 1 Element Another value of Power Factor gets calculated using the measured dc Volts or dc milliampere output as displayed in the Transducer Output section Let us assume that in our next example transducer the output is in dc milliamperes For this example let us say that 1 milliampere of dc current is equal to the full scale Power Factor of 0 5 Therefore the theoretical range of output from the transducer would be 0 5 Power Factor if the output current is 1 milliampere
69. A and ABC Note A B and C are the phases and G is ground e The voltage and current generators may be enabled or disabled The default condition has all voltage and current generators enabled This is indicated by a check mark in the channels selection boxes If the Voltage is held constant the Stop value is expressed in Amps If the Current is held constant the Stop value is expressed in Volts The V I Generators used in the MPRT 8415 unit have 15 amps 150 volts RMS limit and the MPRT 8430 unit have 30 Amps 300 volts RMS limit The Stop value is the fault value for the test e The Start test button is used to execute the current test setup e The Start Stop and Increment values will need to be expressed as an angle in degrees The Increment value is used to increase the angle values from the start to the stop value The test needs to be performed in two directions to calculate the torque During one test the stop value will function as the end point When the test is performed in the other direction the stop value will be the starting point The bottom of the screen has common buttons File This selection will take the user to the File Manager Batt Sim Off Batt Sim On This selection will turn the Battery Simulator On and Off 98 Test Menu Main Menu Start Stop This selection will return the controller to the Test Menu Screen This selection will return the controller to the Main Menu This selection will app
70. By connecting the commons together all of the current channels would then have a common reference point For the grounded common return units there is an internal common ground between the current channels By not connecting a return lead to all of the current channels in use part or all of the return current will be forced through the internal ground That means with a 4 channel unit up to 120 Amperes could be forced through the internal common ground Because of size and weight restrictions the unit is protected internally against too high of a current through the common ground using surface mounted fuse type elements Blowing a ground fuse element will require the unit be returned to the factory for repair Therefore it is important that the parallel connections must be made at the relay not at the source through the common ground return See the following figure Parallel test leads at the relay input terminals Figure 22 Parallel of All Four Current Outputs a NOTE All current channels should be set to the same phase angle 31 2 If two current channels that are to be used in parallel set each to one half of the output requirement The settings between three current channels will be one third the output requirement and four channels would be one fourth Initiate all current channels simultaneously by pressing the Start button All parallel current outputs must be ON to prevent internal shunting of current Note If only two curre
71. E HAZARDOUS This instrument has been designed for operator safety however no design can completely protect against incorrect use Electrical circuits are dangerous and can be lethal when lack of caution and poor safety practices are used There are several standard safety precautions that should be taken by the operator Where applicable IEC safety markings have been placed on the instrument to notify the operator to refer to the user manual for instructions on correct use or safety related topics Refer to the following table of symbols and definitions Direct Current Alternating Current Both direct and alternating current Earth ground Terminal There is a common chassis ground terminal located on the back panel see Back Panel under Description of Controls Protective Conductor Terminal Frame or Chassis Terminal On Supply Off Supply Caution risk of electric shock Caution refer to accompanying documents WARNING Under no circumstances should the operator or technician attempt to open or service this instrument while connected to a power source Lethal voltages are present and may cause serious injury or death SAFETY PRECAUTIONS Continued The following are some specific safety related items associated with the MPRT test system Always start with the power OFF before connecting the power cord Make sure outputs are off before attempting to make test connections Always use properly insulated test leads
72. II O EE 39 3 5 Internal Software Test Profiles 0oooccccococoncconocococcoocconnncconcncconcccnnccnnncnonnanono 40 SEN EE eebe Sal SG RAMPING EE 40 Soo Ns EE 41 gAs USD EE 41 309 Dynamic Frequency KEE 42 296 AUO SYVMCHIOMIZING EE 43 Se A se IC de a 43 3983 SEak RAGE td ai 44 3S9 HMO EEN 44 S9710 Marmonie Resta da a 44 A A Pe ee nee Pee 44 A A O A A 44 SE E FORZI E 44 O A A are eens ee ee 45 Basic Timer Setup Menu arrasa 45 DOS e deiten E 45 Cont Sian 45 Complex Timer Setup MENU sisi ai ds 47 DCS ChIDHOM E 47 3 7 Battery Simulator 00 dios 47 39 Relay TOSUING caia AS 47 3 8 1 Touch View Interface Graphical User lntertace 48 3 8 1 1 VE e WEE EE 48 3 8 1 2 Pre set Test Menu 49 3 8 2 Impedance Relay Testing Menu 000nnnn000nnnnnoennnnnnnnnnnnnsnnnnrnnnrnressnnrrersnnrrressnrrrennnnne 50 3 8 2 1 Impedance Relay Setting Gcreen 51 3 8 2 2 The Reach Test Setting Screen oooncccnnnccccccconnncnnnnnonononannccnnnnonnnnnnennnnnnnnononannnnnnnonoss 52 3 8 2 3 Impedance Relay Pre fault Setting Screen cccccccconcnnnccnnncccconononocnnnnnonononnnnnnnnnnnnnnnos 53 3 8 2 4 Impedance Relay Reach Test Result Gcreen 54 3 8 2 5 Impedance Relay Test Timing Gettnges 55 3 8 2 6 Impedance Relay Timing Test Result Gcreen 56 3 8 2 7 Impedance Relay Angle of Torque Test Settings Green 58 3 8 2 8 Impedance Relay Angle of Torque Test Results Gcreen 59 3 8 2 9 Impedance Relay Target amp Seal In Test
73. If the Duration time is set for zero the unit will skip that State With Dynamic Disabled the user simply uses the selected test sources as a steady state tester When Dynamic Enabled is used the user enters the values for voltage phase angle and frequency with the Duration time These values will be applied to the device under test during the Prefault Duration time and will then switch to the Fault Settings When Dynamic Enabled is used the user enters the Fault values of voltage phase angle and frequency with a Duration time These values will be applied to the device under test during the Fault Duration time or until the device trips which ever comes first and will then switch to the Postfault Settings When Dynamic Enabled is used the user enters the values for voltage phase angle and frequency with the Duration time These values will be applied to the device under test during the Postfault Duration time and will then switch outputs off 129 Step Hz S Ramp button Delta 1 Delta 2 buttons Timer Setup Dynamic Enabled Dynamic Disabled Start Stop File Batt Sim Off Batt Sim On Manual Test Menu When Dynamic Enabled is used the user selects either Step Hz S or Ramp See section 3 5 5 for detail description of the dynamic frequency selection for Hz S Ramp is very similar to Hz S with the exception that the same ramp rate is used for both Ramps The unit defaults to the Step funct
74. Press the button to select from a variety of other color schemes Select one of Anti Default Default Figure 11 Color Palette Selection Screen 2 2 3 3 Brightness The brightness is adjustable The display will always be visible since hardware limits the brightness from becoming too bright or too dark to be seen Press the brightness or buttons to make adjustments 23 2 2 3 4 About Information Screen The V I Generators Timer and Unit Serial Numbers software firmware versions and unit configuration will be displayed once the About button is pressed This information is useful when calling Dallas for service or technical support related issues 2 2 3 5 Date and Time Press this button to reset the Date and Time This information is critical for saving tests and test results in the unit internal file manager 2 2 3 6 Battery Simulator Setting The Battery Simulator output voltage can be set to 24 48 125 or 250 Volts DC The Volts DC selection only establishes the voltage values but does not turn power ON for the Battery Simulator The various test setup screens will allow the Battery Simulator to be powered ON OFF as applicable Pressing the DC Battery Simulator setting button the following selection screen will appear Select one of 24 Volts DC 46 Volts DC 125 Volts DC 250 Volts DC Figure 12 Battery Simulator Voltage Selection Screen 2 2 3 7 IP Address The IP address allows the unit to be conne
75. Save Data button Select Save Data and enter a file name for the test Press Enter The test and data are now saved See File Manager section for additional information 3 8 10 7 Watt Var Va Power Factor Applications As previuously described Watt and VAR transducers come in 1 1 1 2 2 2 1 2 and 3 Element configurations In the Transducer Setting Screen the operator is required to select what type of transducer is to be tested Once selected the internal firmware of the MPRT unit will make certain assumptions and calculations based on the number of elements selected The following are detailed descriptions of the different elements and the calculations required to calculate Watts and or VARs 3 8 10 7 1 Watt VAR 1 Element The single element watt transducer requires 1 voltage and 1 current to test The MPRT will automatically select the first voltage and current channels available V1 and I1 The test will initially start at the default value voltage that is set in the Default Setting Screen For example 120 Volts L N When the user inputs the MAX Watts value in the Transducer Setting Screen the firmware can calculate the required test current for full scale value Since the default angle will be 0 zero degrees the calculation is simple The formula required to calculate Watts is V1 11 COS 0 Watts Example The default voltage is 120 00 Volts AC and the user inputs 500 Watts as Max Value The current required for full
76. Simulator ooooncccnncccnnocnnnccnnnncnnnonnnnncnnnnnononanncnonnnnnnos 161 6 3 1 5 Voltage Current Amplifier Module 162 6 2 1 3 input Power and CONTO usais dadas 162 64 Calibration CHECK sis cocida 163 6 4 1 Checking Transducer DC IN 164 6 4 2 Checking Battery Gumulator 164 6 4 3 Checking AC Volts DC Vote 164 6 4 4 Checking AC Amperes DC Amperes snoseennnereeesserrrttrerstrnrttrrtartrrtrrtensrrnrrrrreennne 165 6 45 Checking AC Current Convertible Channel 166 6 4 6 Checking Phase Ange 167 647 GNECKINO IFIGQUCNCY ada ie ic aria 168 6 5 Preparation for Reshipment cio iia ned canned EE ERR Wweteadedeateandeiinads 168 10 1 0 Operation The unit s design is a modular concept All controls and outputs are clearly marked and logically grouped so continual reference to the instruction manual should not be necessary once the test operator is acquainted with the operation of the test system The unit s rear panel will appear different among units since each unit may have up to four V I Generator Modules and may have an optional EPOCH II EPOCH 20 interface or other type However there must be at least one V I Generator Module installed for this unit to operate properly 1 1 Control Description Figure 1 MPRT Front Panel 1 1 1 Front Panel 1 POWER ON OFF Switch used to switch unit on and off 2 ON Light indicates power is on when illuminated 3 Reset Button the reset button provides
77. V Phase to 180 The voltage outputs will add so the total voltage is the sum of the two voltage amplitudes V and V2as can be seen in the picture below V2 AS Vi EE Note that all units with a style number T in the 7 digit i e 8430L3T6A1 the voltage commons are grounded For the grounded common return units there is an internal common ground between the voltage channels Those units with a style number F the voltage commons are floating For the floating common units you have to connect the associated voltage channels black common returns together when series operation is required Remove external commons when testing is completed DO NOT attempt to series more than two voltage channels together 3 4 2 Dynamic Voltage Relay Test Over Under Voltage Relays can be dynamically tested using one voltage channel along with the timer This procedure applies a normal voltage to the relay under test then automatically adjusts the test voltage to a fault amplitude that is higher over voltage than the pickup voltage The same is true for testing under voltage relays except the test voltage is dropped below the relay pickup voltage Additionally the timer is automatically started with fault voltage applied to the relay under test First set the normal voltage on the relay then with the relay energized to normal condition set the desired fault voltage and Timer Start relay trip circuit should be connected to the Timer Stop terminals
78. V1 but will slip out of phase at the selected slip frequency At the advanced angle based on the slip frequency the relay will close the breaker closing contacts and start the timer When the two voltages slip back into phase the Timer will stop The time indicated will be the advance time setting of the relay The associated closing angle will also be displayed See the following figure for a graphic representation 5 SLIP FREQUENCY F FIXED FREQUENCY STNCHROSCOPE As S approaches F at some point the advance angle the relay will send a close signal which will start the Timer When S and F are in synchronous the Timer will stop The time indicated on the timer display is the advance time of the relay based on the preset slip frequency 134 3 8 10 4 Manual Transducer Test Settings Screen Manual Transducer Test Settings Test Frequency 60 Hz Description Press To Enter Description Select Transducer Type Manufacturer res Ma acture AC Volts Model Press To Enter Model Serial Number Press To Enter Serial Number Transducer Output System Defaults Settings Min Frequency Hz 60 000 Voltage gt Cell 10 000 Voltage 120 000 C Geck oo 20 000 Current DC Volts 0 000 0 000 Settling time Accuracy Figure 98 Transducer Setting Screen This screen is used for selection of single phase or three phase transducers such as AC and DC Voltage AC and DC Current Frequency Power Watts Reactive Power
79. VAR s Apparent Power VA and Power Factor The types of transducers are easily selected in the Transducer Setting Screen 3 8 10 4 1 Select Transducer Type In the Transducer Setting Screen the user may select from a variety of transducers see Select Transducer Type window Here the operator may select by touching the selection window the type of transducer that he she needs to test Watt VAR and VA transducers come in 1 1 1 2 2 2 1 2 and 3 element configurations Selecting the number of elements will automatically select the appropriate number of output voltages and currents needed to test the selected transducer For example selection of a single element Watt transducer V1 and I1 sources will automatically be selected for you In the case of a three phase 3 element transducer V1 V2 V3 11 12 and 13 will be preselected for your use Selections available are Single Phase Multi Phase AC Volts Watts VAR VA 1 1 2 Element AC Current Watts VAR VA 2 Element DC Volts Watts VAR VA 2 1 2 Element DC Current Watts VAR VA Power Factor 3 Element Frequency Watts VAR VA Power Factor 1 Element 3 8 10 4 2 Transducer Description Section In the description windows the operator enters descriptive information relative to the transducer to be tested This information will be saved with the test results The following describes the window entries 135 Description Input a short description of the transduce
80. Y However selecting the single phase mode limits the user to one V I Generator The bottom of the screen has common buttons Test Menu This selection will return the controller to the Test Menu Screen Main Menu This selection will return the controller to the Main Menu 91 3 8 2 2 The Reach Test Setting Screen The impedance test settings screen will establish and run a test using factory defaults or manufacturer s recommended values if entered impedance Reach Test Settings Test Frequency 60 Hz Prefault Settings Relay Settings Prefault Voltage 69 26 N Current 3 0 Amps Time 100 0 m5 Hold Test Amplitude Hold Test Amplitude 4 5 J Amps Timer Setup Mon C NO Latch Off T3 Figure 32 Reach Test Setting Screen e The Pre fault Settings button sets the necessary pre fault conditions for relay testing e The Relay Settings button will allow the entry of relay setting values to test and evaluate the relay e When the current lags the voltage using 0 to 359 9 the message lagging xxx x Degree is used Otherwise no message is required when using 180 e The Fault Type determines the kind of fault tested The accepted values are AG BG CG AB BC CA and ABC Note A B and C are the phases and G is ground e The test entry has two possible selections Ramp and Pulse Ramp The selection of the Ramp test will not use all the entries for pulse time The ramp test changes the V I Generator outpu
81. ad the firmware into the unit If not a message appears informing the user that there are no upgrades available for that unit Firmware Upgrade via Compact Disk A Compact Disk is available with the latest version of firmware available part number 544323 There is a Read Me word document on the CD that provides a step by step procedure on how to update the MPRT using the CD Basically you turn your PC into a server that the MPRT calls to download the new firmware Firmware Upgrade via Megger Website Now customers can access the Megger website and download the same data that is on the Compact Disk and update the same as if using the CD version To download the newest firmware from the Megger website Go to WWW Megger com Log In If the customer has not registered they will need to do so first Go to Software Downloads Click on MPRT ee Led 158 6 3 5 You will see instructions on how to download and update the firmware in their MPRT unit Then click on MPRT Firmware Update The firmware will be downloaded onto the users PC ready to update their unit s The fourth way to update the firmware would be to return the unit to Dallas Any customer with Version 27 4 is required to return their unit to Dallas for upgrades Those with V28 or higher can update via the three other methods Service and Repair Instructions It is not always necessary to return the complete MPRT unit to the factory for repair To save turn around
82. age Erratic operation no output input power circuit breaker operation 2 High voltage Circuit breaker operation power supply failure in Input Power Module 6 3 1 3 Input Power and Control Basic troubleshooting of the input power and manual controls are as follows 1 No power Check power source and line cord 2 Erratic Manual Control A Individual Output Module is not properly set into the interface board connector thus cannot receive proper commands CAUTION Turn off main power and unplug line cord before attempting to reseat any module Observe proper ESD procedure Re seating Voltage Current VI Gen Amplifier Module To reseat the module in the chassis A Disconnect the power cord from the unit B Carefully remove the cooling fan assembly located in the back of the unit Note two captive screws at the lower bottom are flat head screws the other four screws located across the top are Phillip head screws C Remove the two retaining screws located on the back of the VI Gen D Grasp the back the Module with one hand and gently yet firmly pull the module from the unit an inch or two Then slide the module forward until you feel it completely reseat into the female interconnect Reinstall the two screws into the module retaining bracket Reinstall the cooling fan assembly After reseating the output module and reinstalling the cooling fan assembly reconnect the power cord and power up the unit Manually turn out
83. al Tests display button The screen defaults to a DC IN current measurement in Milliamperes Apply appropriate input as indicated by the following Table to the transducer input using Multi calibrator Record readings indicated on TVI Repeat for all currents listed in the Table 1 Table 1 Transducer DC IN Milliamperes eS aa ET Measured Rane Tolerance UUT MIN MAX 0 05 0 9995 1 0005 v 0 0 05 9 995 10 005 20 oo LL 19 990 200 Press the DC IN button on the Manual Voltage Current Screen The measurement will change to DC Volts Input voltage indicated by the following Table Repeat for all voltages listed in Table 2 Table 2 Transducer DC IN Volts Ino a Op EN mm Range UUT SEET ee ee po OM 4 99750 5 00250 0 0 oos 900 6 4 2 Checking Battery Simulator From TVI Main Menu select System Config button Select Battery Simulator button and select 24 Volts Connect the DC Multimeter to the Battery Simulator output terminals Set to measure 24 Volts DC Press the BattSim Off 24 Volt DC Button at the bottom center of the screen The button window will change from Green to Red indicating output on Repeat for all voltages listed in the TVI Battery Simulator Window Table 3 Battery Simulator Outputs Battery Measured a a PS 24V 10 eee 125v 10 1 1375V 290 10 Ly 6 4 3 Checking AC Volts DC Volts Connect the appropriate voltage output terminals of the
84. and Results ooocccccccconncnncncnonncnnononanennnos 61 3 8 3 Overcurrent Relay Test Menu 62 3 8 3 1 Over Current Relay Setting Gcreen E E a E 63 3 8 3 2 Overcurrent Relay Test Configuration Screen ooocccccccococccnnccononcnnnononanennnnonnnnnononanenos 64 3 8 3 3 Overcurrent Relay Pickup Test Results cccccocnnccnccccconconcccconnconnononannnononancnnnononanenns 66 3 8 3 4 Overcurrent Relay Target amp Seal In Test Results 000nnn000nnn0annnnannnnnannnnannnnnnnnnnnnnnne 67 3 8 3 5 Overcurrent Relay Instantaneous Test Results oonccccoconcnccccnnnnccconnnnoconenononcnnnnnos 68 3 8 3 6 Overcurrent Relay Timing Test Results cccccconnccncccccnnnonccccnnncnnnnnonanonononancnnnononanenns 69 3 8 4 Differential Relay Test Menu 70 3 8 4 1 Differential Relay Setting Scree Maan e a 71 3 8 4 2 Differential Relay Test Configuration Screen oocccccccnocccnncnononnnnncnononcnnnononannnnnnnnanennnnos 73 3 8 4 2 Differential Relay Winding 1 2 or 3 Pick Up Test Results ooccccoccccccccncccncncconononos 75 3 8 4 3 Differential Relay Harmonic Restraint Test Results cooocccccccnccconncoconncocnnncnnnnononos 76 3 8 4 4 Differential Relay Slope Test Hesults 77 3 8 4 5 Differential Relay Seal In Test Hesuhte 78 3 8 4 6 Differential Relay Instantaneous Test Results oocccccccncccccncconnnoconnnonannnonacononenononos 79 3 8 4 7 Differential Relay Through Fault Test Heeulte 80 3 8 4 8 Differen
85. any time will stop the test and turn the outputs off This selection will display the Timer Setup menu The trip time will display the time from initiation of the timer to the time when the first stop post results in a true condition The Reclose time will only be displayed when Dynamic Enabled button is selected and a Duration time is set in the BRK Trip selection The Reclose time will display the time between the transition from BKR Trip to the time when the first stop post results in a true condition With Dynamic Disabled the user simply uses the selected test sources as a steady state tester When Dynamic Enabled is used the user enters the values for voltage current phase angle or frequency with the Duration time These values will be applied to the device under test during the Prefault Duration time and will then switch to the Fault Settings When Dynamic Enabled is used the user enters the Fault values of voltage current phase angle or frequency with a Duration time These values will be applied to the device under test during the Fault Duration time or until the device trips which ever comes first and will then switch to the Breaker Trip Settings When Dynamic Enabled is used the user enters the values of voltage current phase angle or frequency with a Duration time These values will be applied to the device under test during the Breaker Trip Duration time or until the device provides a reclose signal t
86. asured by the unit s hardware The optional External High Current Amplifier connects to an external source such as an EPOCH Il EROCH 20 or other system 48 3 8 1 2 Pre Set Test Menu The Pre set menu contains all the relay test options Test Frequency 60 Hz Over Current Synchronizing Differential Frequency Impedance Voltage Reclosing Figure 29 Pre Set Test Menu Select the relay type to undergo testing Once selected the display will move to that set of relay setting and test screens The File button takes the user to the File Management Screen The Main Menu button will return to the Main Screen 49 3 8 2 Impedance Relay Testing Menu The unit contains a set of default values so a test operator interested in running a quick test will not have to enter this data Impedance Test Menu Test Frequency 60 Hz Relay Settings Angle of Torque Figure 30 Impedance Relay Menu Screen This menu permits the setting and testing of an Impedance or Distance relay These tests should be conducted in accordance with the manufacturers relay specifications The bottom of the screen has common buttons File This selection will take the user to the File Manager Pre set Tests Menu This selection will return the controller to the Pre set Test Menu Screen Main Menu This selection will return the controller to the Main Menu 50 3 8 2 1 Impedance Relay Setting Screen Impedance Relay Setting Test Freq
87. ay sensing phase to phase voltage and single phase current or two phase current One is for three phase voltage and two phase current applications while another is for three phase voltage and current 4 wire Y connections Another is for loss of excitation relay calibrated in Watts In the Power Relay Setting Screen the Normal Volt is the desired test voltage per phase Under most single phase applications that would be considered a phase to ground voltage However for single phase relays with the potential coil connected phase to phase and if the relay has a 30 lagging phase shift built into the voltage input circuit the formula Voltage o2 Current Cosine 0 30 V3 will consider the Normal Volt set in the Relay Setting Screen as the phase to phase voltage and takes into account the 30 phase shift to calculate Watts Therefore it is important that the user consider the relay design application the relay manufacturers recommended test connections relay settings and select the appropriate formula accordingly For the above example the manufacturer has the user apply a single phase voltage equal to the phase to phase value witha single phase current lagging the voltage by 30 For this example let us assume a voltage value of 120 volts phase to phase The technician would enter 120 volts into the Normal Volt window If the relay pickup setting is 180 Watts then we would expect the relay to operate at about 2 59 Amperes 120
88. cally select the first voltage channel available V1 The test will initially start at the default value voltage and frequency that is set in the Default Setting Screen For example 120 Volts L N 60 0000 Hz When the user inputs the MAX Frequency value in the Transducer Setting Screen the firmware will calculate the required test frequency for full scale value Example The default frequency is 60 00 and the user inputs 65 Hz as Max Value Therefore when the user inputs 65 Hz in the MAX value window the test set should automatically show a test frequency value of 65 Hz at the default voltage value of 120 Volts When the test is Started the measured voltage and frequency outputs are displayed The MPRT output frequency is the value that gets displayed in the Transducer Test Screen under the MPRT Output next to the Label of Output Frequency Another value of Frequency gets calculated using the measured dc Volts or dc milliampere output as displayed in the Transducer Output section Let us assume that in our example transducer the output is in dc Volts For this example let us say that 10 DC Volts is equal to the full scale output of 65 Hz Therefore the theoretical output Frequency from the transducer would be 65 Hz if the transducer output voltage is 10 Volts DC For this example let s say that the measured MPRT output frequency is 65 00 Hz and the measured transducer output voltage is 10 001 Volts The measured transducer output Frequen
89. cted and controlled on a local area network Pressing the IP Address button will produce the IP Address Dialog box See Section 6 2 MPRT Ethernet Port and IP Networks for details associated with use of the Ethernet port and IP address settings IP Address Dialog Local IP Address aaa a Network Mask Default Gateway Figure 13 Ethernet IP Address Dialog Box 2 2 3 8 Serial Port The Serial port will operate at various baud rates Pressing the Baud Rate button will provide a list of baud rates to choose from Popular rates are 9600 19200 38400 57600 and 115200 The higher bauds rates provide faster downloads and response to commands 24 2 2 3 9 GPIB Address The GPIB address is selectable from 01 to 15 The factory default is 01 This will permit communication between a personal computer and the unit once the IEEE 488 GPIB driver is set to communicate with the respective address 2 2 3 10 Convertible V I Control Used to change voltage channel to a current channel Current configuration will be highlighted in red while the unselected channels will be in green If the channel is not present it will be in grey and not available for selection VI Control Selection EE E EHN Figure 14 Convertible V I Selection Screen Note If channel is not installed the channels will be grey see Figure 15 above 2 2 3 11 Phase Angle Setting The Phase Angle Setting has three selections 0 360 Lead Lag or 180 In addition
90. cy would be If 65 00 Hz 10 Volts DC Then 65 10 6 5 Hz V 154 10 001 V 6 5 Hz V 65 0065 Hz For this example the displayed Hz in the Transducer Output section of the Transducer Test Screen should read 65 0091 Hz The Accuracy displayed in the Transducer Output section would be equal to the following 65 0065 65 0000 65 0000 100 accuracy or 0 01 If this were a 0 02 transducer then the firmware would compare the accuracy values between the Setting Screen and the Test Screen and would display PASS in the Transducer Output section of the test screen 185 4 0 External High Current Amplifier The External High Current Amplifier will use the test screens with the High at the bottom of the display Otherwise the screen may not be used by the external amplifier Typically this interface is used in relay tests that require a larger amount of current than can be supplied by the unit The High Current Interface is initiated in the Main Menu Screen Note the EPOCH l1 20 series products have a minimum frequency limitation of 5 hertz Also the output compliance voltage and VA output is derated linearly to 50 of the specification from 20 to 40 hertz Connect the EPOCH II or EPOCH 20 to the optional interface at the rear of the unit The connectors at the rear of the MPRT correlate to the Current Amplifier in the TVI Channel 1 on the rear option panel correlates to current channel 19 on the TVI Channel 2 c
91. d All other trademarks are the property of their respective owners Notice to U S government end users The hardware software and documentation are commercial items as that term is defined at 48 C F R 82 101 consisting of commercial computer software and commercial computer software documentation as such terms are used in 48 C F R 812 212 or 48 C F R 227 7202 as applicable Consistent with 48 C F R 912 212 or 48 C F R 227 7202 1 through 227 7202 4 as applicable the commercial computer software and commercial computer software documentation are being licensed to U S government end users 1 only as commercial items and 2 with only those rights as are granted to all other end users pursuant to the terms and conditions set forth in the Megger standard commercial agreement for this software and hardware Unpublished rights reserved under the copyright laws of the United States The recipient if a Government agency acknowledges that this manual and the equipment described were procured with Limited Rights to technical data as described in ASPR 9 203 b The MPRT test set includes an RTOS resident computer program This program belongs to Megger and contains trade secret ideas and information of Megger Written and designed at Megger 4271 Bronze Way Dallas Texas 75237 Printed in the USA 2003 2005 Megger All rights reserved SAFETY PRECAUTIONS WARNING VOLTAGES GENERATED BY THIS INSTRUMENT CAN B
92. d 30 clockwise In other words the angle is lagging the referenced source by 30 Conversely if the angle decreases in the counterclockwise direction from 359 9 toward 0 0 for a setting angle of 300 0 the second output would look like 300 The reference output is 0 and the second output is rotated to 60 in the counterclockwise direction In other words the second output lags the reference output by 300 or leads it by 60 The user may default to phase angles to 180 with the negative angles lagging and the 30 positive angles leading Therefore to set an angle of 10 leading the vector relationship would be 3 3 3 3 1 10 Ae Current Sources Parallel Operation Two three or four current channels may be connected in parallel to provide additional current capacity This is necessary when higher test currents are needed for testing instantaneous trip elements To parallel the current channels of the unit perform the following 1 Note that all units with a style number T in the 7 digit i e 8430L3T6A1 the current commons are grounded Those units with a style number F the current commons are floating Using the current channel test leads connect each current channel to the relay under test both red and black terminals to the load Obviously for the floating common units you have to connect the black common return to the relay or there would not be any current flow from that channel
93. d and begin the test After Start is pressed this button will turn red and display Stop Pressing Stop at any time will stop the test and turn the outputs off When running this test the user should close the main contact manually Once the contact closes the path for the DC target and Seal in is closed also Current I is used to ramp a DC current up until the target drops The user must press the Stop button and record the results 78 3 8 4 6 Differential Relay Instantaneous Test Results This screen displays the results upon test completion No data may be entered in this screen Differential Instantaneous Test Settings Test Frequency 60 Hz AZZ Timer Mon C N O Latch Off setup T3 Figure 56 Differential Instantaneous Test Screen The Timing Target Seal In and Pickup test screens may be entered to change test settings Each current channel must be selected by touching 11 12 and I3 However there must be a corresponding V I Generator The bottom of the screen has common buttons File This selection will take the user to the File Manager Batt Sim Off Batt Sim On This selection will turn the Battery Simulator On and Off Test Menu This selection will return the controller to the Test Menu Screen Main Menu This selection will return the controller to the Main Menu Start Stop This selection will apply the set quantities displayed and begin the test After Start is pressed this button will turn re
94. d and display Stop Pressing Stop at any time will stop the test and turn the outputs off A link to Timer Setup configuration is be available on this screen Also the Timer 19 Setup configuration is displayed for convenience The user selects the appropriate number of channels required pressing I l2 and lz The amount of current required will be split proportionally between selected current channels The calculated Start and Stop current can also be seen on the test screen The Stop current is the maximum current provided by the test set before test is stopped The status of the relay contact will be displayed on the screen real time along with the value of the current s and the percentage error 3 8 4 7 Differential Relay Through Fault Test Results This screen displays the results upon test completion No data may be entered in this screen Differential Through Fault Test Settings lest Frequency 60 Hz Mag Amps Angle Frequency Hz ntain Menu Figure 57 Through Fault Test Screen This test requires two current channels A link to Timer Setup configuration is be available on this screen Also the Timer Setup configuration is displayed for convenience For this test the currents will be applied to the restraints for a short period of time and the relay should not operate If it does operate the message Test Failed will appear on the screen The bottom of the screen has common buttons File This selection will take
95. d then starts the timer The timer input is used to monitor the relay s trip The timer stops once the timer detects the relays contacts have operated This function is normally used when timing under over voltage or frequency relays 41 3 5 5 Dynamic Frequency Hz S Some frequency relays require a dual ramp to perform this test Three sets of data need to be established to perform the test These sets of data are the pre fault fault and post fault conditions The dynamic frequency test is executed from the Manual Frequency screen This test requires a single voltage generator The change in frequency happens when the frequency passes through the positive going zero crossing The rate of change Is defined as the delta Hz S The frequency is changed every cycle at the positive going zero crossing The test limits the delta setting to a maximum value of 10Hz sec with anything greater being treated as a Step test The frequency increment is calculated for each cycle prior to starting the dynamic ramp If we use a delta of 1 Hz sec and want to ramp from 60 to 50 hertz then the time would be ten seconds to go from 60 hertz to 50 hertz in increments of 0 01667 hertz steps per cycle The first set defines the pre fault values which are necessary to energize the relay before the fault condition The following diagram shows the frequency decreasing However the frequency ramp could be increasing as well The pre fault and fault values determines the di
96. dency to bounce there could be a difference between an external standard timer and the MPRT Timer depending on the programmed de bounce period To determine the programmed value look at the Timer Setup Screen and see what the De bounce setting value is 161 If a timing error or variation persists after all the suspected causes of error have been eliminated then it is possible that the Binary Input circuit is malfunctioning Contact factory for return instructions 6 3 1 5 Voltage Current Amplifier Module It is usually recommended that the complete Voltage Current Amplifier Module assembly be returned for factory repair if found to be defective Then any improvements that have been made can be incorporated into it during repair and servicing Due to the extensive use of Surface Mount Technology in the amplifier module there is very little that can be repaired without special tools and training Some basic troubleshooting can pinpoint problems to the approximate cause Basic troubleshooting is as follows 1 A Voltage Module no output when the MPRT is energized Voltage Amplifier Module power supply failure or loose interface connections CAUTION Turn off main power and unplug line cord before attempting to reseat any module Check for proper input voltage Check VI Gen Amplifier Module make sure it is properly seated into the back plane connector See instruction under section 6 2 1 3 Input Power and Control for reseating the
97. e File Manager This selection will return the controller to the Test Menu Screen This selection will return the controller to the Main Menu The Test Configuration button will take the user to the Test Configuration Menu This menu is used to set additional test parameters such as ramp increment and start and stop points These test parameters should not need to be adjusted 12 3 8 4 1 Differential Relay Test Configuration Screen The test configuration menu is used to adjust the advanced relay testing parameters The TVI has default test parameters that should not need to be adjusted by the user If the user has determined these values do need to be adjusted then following the directions in the TVI Operations section Test Configuration Screen Test Frequency 60 Hz Pickup ramp Instantaneous pulse Target Seal in ramp Spec MICA SPE Micshons DCH ations Iincrem ent eye incrementin cyc Figure 51 Test Configuration Screen Pickup Ramp Specifications Increment 10 cycles This value is used to control the how fast the MPRT will increase the current to determine the pickup value The value input into this field is in increase per 10 cycles The default value for this field is 1 of pickup Example If the pickup value requires 1 0 ampere the MPRT will increase the current magnitude 0 01 amperes every 10 cycles until the relay contacts close For smaller increments use a smaller percentage Instantaneous Pulse Ra
98. e current channels V1 V2 V3 11 12 and 13 The test will initially start at the default voltage value that is set in the Default Setting Screen for each Voltage output Thus for a default voltage setting of 120 volts V1 will be set to 120 Volts at an angle of 0 V2 will be 120 Volts at 120 lagging and V3 will be 120 Volts at 240 lagging This assumes that the default phase angle is 0 360 Degrees lag and not 180 degrees If the 180 degree phase angle option is used then V2 will be at 120 and V3 will be at 120 11 12 and 13 will be in phase with their respective voltages When the user inputs the MAX Watts value in the Transducer Setting Screen the firmware can calculate the required test currents for full scale value The formula required to calculate Watts for 3 Element transducer is V1 11 COS V2 12 COS Y V3 13 COS Y Total Watts Where Y is the incremental angular change between V1 and l1 V2 and 12 V3 and 13 Example The default voltage is 120 00 Volts AC and the user inputs 1500 Watts as Max Value The current required for full scale output from the transducer is 120 11 COS 0 120 12 COS 0 120 I3 COS 0 1500 Watts l1 500 Watts 120 Volts COS 0 or 11 500 120 then 11 12 and 13 will be 4 1667 Amperes each Therefore when the user inputs 1500 Watts in the MAX value window in the Test Screen the test set should automatically show a test current value for
99. e entered in this screen Power Timing Test Settings Test Frequency 60 Hz Formula 0 0000 Seconds Latch On 00000 Seconds 0 0000 Seconds Open 0 0000 Error 0 0000 Error 0 0000 Error Test Main Menu Menu Figure 73 Power Relay Timing Test Setting Screen The bottom of the screen has common buttons File Batt Sim Off Batt Sim On Test Menu Main Menu Start Stop This selection will take the user to the File Manager This selection will turn the Battery Simulator On and Off This selection will return the controller to the Test Menu Screen This selection will return the controller to the Main Menu This selection will apply the set quantities displayed and begin the test After Start is pressed this button will turn red and display Stop Pressing Stop at any time will stop the test and turn the outputs off A timer setup link is available on this screen Also the Timer Setup configuration is displayed for convenience The status of the relay contact will be displayed on the screen real time along with the value of the test quantities After the test is completed the trip time for all multipliers the expected ones the percentage error and the test quantities will be read out from the screen or stored in the memory 102 3 8 8 Reclose Relay Test Menu This menu permits the setting and testing of a reclose relay These tests should be conducted in accordance with the manufacturer
100. e operator may use the knob to modify the value 28 3 2 Setting Phase Angle Relationships Think of each V I Generator module as a vector generator Each module has an internal zero reference to which it references its phase angle settings as displayed on the TVI This applies to phase angle settings between the voltage and current outputs When setting a phase angle between two outputs it is recommended that one output be set at 0 and the other output be referenced to the 0 This is for operator convenience only When setting an angle the operator has a multiple of choices depending on the Default Phase Angle setting in the Default Setting Screen see 2 2 3 9 In the engineering world and in the following figures the lagging diagram displays negative rotation and will create negative sequence components while the Lead and 180 diagrams display positive rotation which is normal system activity A m R de wk N E m NX 180 me g 180 PP 0 Y ae 270 360 Lead 270 0 360 Lead 0 240 120 deg Figure 19 Positive Phase Rotation Diagrams 9 0 360 Lag 9 o 360 Lag 0 120 240 deg Figure 20 Negative Sequence Phase Rotation Diagrams 29 0 120 120 degl Figure 21 Positive Phase Sequence Rotation Using 180 For example using 0 360 Lag 0 120 240 setting an angle of 30 between the two outputs would look like i 30 The reference output is 0 and the second output is rotate
101. e or dc milliampere output The default settings are O for minimums 10 Volts dc and 20 milliamperes dc for Maximums It should be noted that Minimum Value could be a negative dc value For example 1 milliampere or 10 Volts dc It could also be a positive dc value other than 0 For example the Minimum could be 4 milliamperes In other words the minimum could be 4 mA and the Maximum could be 20 mA The firmware will calculate the scalling factor based on the minimum and maximum values and use this scaling factor to calculate the actual output from the transducer in terms of Volts Amperes Watts etc In addition to Min and Max if a Power Factor transducer was selected in the Select Transducer Type window then Min and Max will change to Lead and Lag see description for Lead and Lag in section 3 2 Voltage or Current The operator selects one by touching the button associated with either the Voltage or Current If the Min and or Max are different from the defaulted values the operator touches the appropriate window and a numeric keypad will appear to enter the appropriate value s In our example the transducer is a Watt transducer When Watt 3 Element was selected in the Select Transducer Type window Watts appears in the Transducer output window In the above example a value of 1500 0 was entered as the Max output The Fullscale Current was set at 1 000 milliamperes Therefore the scaling factor will be 0 0 mA 0 0 Wa
102. e window in the Test Screen the test set should automatically show a test current value for 11 of 4 167 Amperes at an angle of 0 and 12 will be 4 167 Amperes at an angle of 180 Note that the current is rounded up to 7 in the last digit displayed When the test is Started the measured voltage and current outputs are displayed and the calculated Watts is based on the measured voltage and current outputs This is the value that gets displayed in the Transducer Test Screen under the MPRT Output next to the Label of Watt 1 1 2 Element Another value of Watts gets calculated using the measured dc Volts or dc milliampere output as displayed in the Transducer Output section Let us assume that in our example transducer the output is in dc milliamperes For this example let us say that 1 milliampere of dc current is equal to the full scale output of 1000 Watts Therefore the theoretical output Watts from the transducer would be 1000 Waits if the output current is 1 milliampere For this example let s say that the measured output voltages are 120 00 Volts V1 and V2 and the measured output currents are 4 166 Amperes at 0 The measured output Watts would be 120 00 4 166 COS 0 120 00 4 166 COS 0 999 94 Watts For this example let s assume the measured output current from the transducer is 0 998 mA dc Based on a Max value of 1 mA equals 1000 Watts the displayed Watts in the 144 Transducer Output section of the Transducer Te
103. ease the current to determine the pickup value for the target and seal in The value input into this field is in increase per 100msec The default value for this field is 02 of pickup Example If the pickup is set for 2 0 amperes the MPRT will increase the current magnitude 0 0004 amperes every 100msec until the relay seal in contacts close The Relay Settings button will return the user to the Relay Settings Menu This selection will take the user to the File Manager This selection will return the controller to the Test Menu Screen This selection will return the controller to the Main Menu 65 3 8 3 3 Overcurrent Relay Pickup Test Results This screen displays the results upon test completion No data may be entered in this screen Overcurrent Pickup Test Test Frequency 60 Hz Timer Setup Mon C T3 Figure 44 Overcurrent Relay Pickup Test Screen The Timing Instantaneous and Target A Seal In test screens may be entered to change test settings The bottom of the screen has common buttons File This selection will take the user to the File Manager Batt Sim Off Batt Sim On This selection will turn the Battery Simulator On and Off Test Menu This selection will return the controller to the Test Menu Screen Main Menu This selection will return the controller to the Main Menu Start Stop This selection will apply the set quantities displayed and begin the test After Start is pressed this but
104. ective relay types that are to be evaluated There are factory default settings for the timer inputs 18 1 5 1 Binary Inputs Timer The Timer is specifically designed to measure high speed operation of electro mechanical solid state and microprocessor based protection relays In addition it will perform timing tests on EHV to low voltage breakers trip circuits and contactors The factory default settings are Input 1 Timer start normally open position and latched ON Input 2 Timer stop normally open position and latched ON Input 3 Dry Contact monitor normally open position and latched OFF And Inputs 4 through 16 as dry contact monitor normally open position and latched OFF It incorporates the banana plug receptacles that may be programmed to be Start Gates Stop Gates and Monitor Gates all Stop Gates all Contact Continuity Monitors or all Voltage Applied Removed Monitors 1 5 1 1 Start Stop and Monitor Gates In the TVI there are up to sixteen identical independent programmable gate circuits Start Stop and Monitor that permit simple selection of the desired mode for timing or contact monitoring operation There are 10 internal inputs and 6 optional external inputs for the unit To monitor operation of the contacts or trip SCR in the device under test an ACTIVE light is provided for each gate The gate circuit is isolated for voltage sensing and can monitor solid state logic signals Each Active l
105. ed UUT output will be displayed on Touch View Interface TVI Repeat for all values listed in the Table Table 9 Phase Angles Between V1 and V Ref V1 AAA Volts Vit 120 V 0 25 59 75 0 025 _ o 025 0 25 To test angles between V1 and all current channels requires the use of a load box to convert the current outputs to a voltage for input into the Atlantic Phase Angle Meter 167 Lacking a load box use a Megger Model PMM 1 to measure the phase angle of the current directly Remember to add the error of the PMM 1 to the total allowable error Use a test current of 5 amperes and repeat the phase angles in the following Table Table 10 Phase Angles Between V1 and L Phase Angle Ref V1 120V Currentt Levels ILL Oo 025e 89 75 90 25 A S do 025e 17975 180 25 o 270 toas 6 4 7 Checking Frequency Connect MPRT voltage output to Fluke frequency counter Set counter to 1MQ filter on auto trigger and time to 30 sec Using TVI apply appropriate output to counter MPRT frequency readings will be displayed on Touch View Interface TVI Repeat for all ranges and values listed in the following table Table 11 Output Frequency Test fe E Je me ees Frequency Output Setting Hz Tolerance UUT MN MAX 120V _ 10 25 ppm 999975 10 00025 SS 20 25 ppm 49 99875 50 00125 D I AB pm 59 9985 60 00150 O 100 2B ppm 99 9975 100 0025 pf 1000 5ppm 999 975 100
106. election will take the user to the File Manager Pre set Test Menu This selection will return the controller to the Pre set Test Menu Screen Main Menu This selection will return the controller to the Main Menu 3 8 7 1 Power Relay Setting Screen The Power Relay Settings Menu is used to input relay settings and relay test parameters The data input into the relay settings screen will be used by the MPRT to calculate appropriate test currents or voltages to test the relay Power Relay Settings lest Frequency 60 Hz Relay Tapi atts Time Dial Reset Time Normal vol 0 000 120 00 Type Y Formula Test Angle H Tesi Multiple A Test Multiple B Test Multiple C 3 000 Figure 69 Power Relay Setting Screen The Power Relay Settings menu is used to input relay settings and test values To insert the relay settings or test values press the appropriate button and insert the value as described in Touch View Interface Operation After all pertinent relay settings are keyed in the next step is to select the desired relay test at the top of the screen Pickup The Pickup button will take the user to the Pickup Test Menu Timing The Timing button will take the user to the Timing Test Menu Target amp Seal In The Target Seal In button will take the user to the Target Seal In Test Menu Relay Tap This value is the relay tap setting or the value at which the relay will start timing This value is also known as
107. ent starts to be generated 45 Condition Latch Mode Max Operate Time Debounce Time Turn Currents Off Stop Contact Only Turn Voltages Off Stop Contact Only Horn On Horn Off Seconds Cycles Complex Timer Timer Reset Back Sets the parameters under which a true or false contact is determined The selections of condition are as follows NO Normally Open dry contact NC Normally Closed dry contact VA Voltage Applied wet contact VR Voltage Removed wet contact N A Not Applicable Sets the parameter under which the timer will either stay on after a contact state becomes true or will return to previous state after the contact changes state Latch On Will latch the timer in that condition after the timer has reached a true condition Latch Off Will allow the timer to return to original condition even after the contact has reached a true condition Determines the maximum timer the unit will operate before the outputs are turned off This function is only applicable when the timer is operating Determines how long a contact must be in a true state before the condition is determined to be true When selected will turn all output currents off when the stop contact becomes true When selected will turn all output voltages off when the stop contact becomes true This selection will turn the horn on when any contact is determined to be true This selection will toggle the timer between measuring i
108. equency divided by delta time The bottom of the screen has common buttons File This selection will take the user to the File Manager Pre set Tests Menu This selection will return the controller to the Pre set Test Menu Screen Main Menu This selection will return the controller to the Main Menu 148 3 8 9 1 Frequency Relay Setting Screen Frequency Relay Setlings Test Frequency 60 Hz Relay Tap Time Dual Normal Volt 58 000 0 000 69 26 Reset Time Target Tap Normal Freg 1 00 60 0 Fault Freg ab U 540 57 7 Toler ance ES 0000 seconds Trip Time Increment Figure 90 Frequency Relay Setting Screen e The Timing Settings button will change screens and will allow changes to meet the manufacturer specifications e The Target A Seal In Settings button will change screens and will allow changes to meet the manufacturer specifications e The Pickup Settings button will change screens and will allow changes to meet the manufacturer specifications e Relay Tap Time Dial Normal Voltage Normal Frequency Reset Time Target Tap Fault Frequency and Trip Time to be set unless factory defaults are used e The Timer Setup screen allows the user to define how the time will be used e The relay will require a fault frequency and trip time to calculate the relay theoretical reclose The measurement is the delta frequency divided by the delta time where the setting can be either a ramp rate or a step function as selected
109. equency relays either electro mechanical or solid state single or multi set point To test a typical multi set point solid state under frequency relay the following procedure applies 1 Set the NORMAL Line Frequency and VOLTAGE using the touch screen and numeric keypad Read the frequency and voltage selected on the appropriate displays 2 Enter the Relay Tap or Setting frequency value in the Relay Tap window Set the desired FAULT Frequency normally a value below under frequency or above over frequency the Tap or Setting value by using the touch screen and numeric keypad This is the frequency that the output will delta or step to For doing a timing test enter the appropriate trip time for that fault frequency 122 Set the desired TIMER Start Frequency If using a ramping frequency output when the output frequency ramps through the TIMER Start Frequency the TIMER will start If using a Step Function the TIMER Start Frequency must be equal to the FAULT Frequency With the relay trip circuit connected to the STOP gate binding posts select the appropriate TIMER Stop gate Select the TIMER Start Stop LATCH ON both the START and STOP circuits NOTE Failure to LATCH circuits will result in timing error Set the DURATION Time by using the touch screen and numeric keypad Time indicated is in seconds This time is the desired time which the output frequency will remain at the selected fault frequency The DURATION Time should be
110. er half displays the files and directories File names are limited to 99 capital letter characters The alphanumeric keypad is used to enter file or directory names In addition the name of a file or directory will appear in the name area as the cursor moves using Up and Down buttons through the list of files or directories The following list of actions may be used in this display through pull down menus Save Data Read Data Make Directory Rename Delete Save User Sys Defaults Read User Sys Defaults Read Factory Defaults and Delete Factory Defaults If files are to be deleted or written over a warning message will alert the operator this action is about to take place This allows the operator to cancel the action 2 2 4 1 Test Files The test files are used to verify the functionality of specific relays These files typically verify the functionality of the entire relay to ensure the operational readiness of this unit under test UUT The test files may be provided by Megger or generated by the customer Default files may be added to or removed from the database These files will reside in a specific directory in the MPRT internal memory 2 2 4 2 Test Results The test results may be stored in the MPRT internal memory as a soft copy or downloaded into a PC for soft and or hard copy The test results file must be saved using the file management display This is performed using a file naming convention that uniquely identifies the test resul
111. ere away from energized electrical circuits 6 1 1 6 2 Examine the unit every six months for Dust and Dirt To clean the unit disconnect the power cord from the unit Never use spray liquids or industrial cleaners Some cleaning solvents can damage electrical components and should never be used Water and a mild soap may be used Use a lightly damp cloth not dripping wet to wipe off the unit A dirty heat sink can cause thermal overloads Remove dust with dry low pressure compressed air Either remove the module from the chassis or simply apply air forcing the dust away from the heat sink Moisture Remove moisture as much as possible by putting the test set in a warm dry environment MPRT Ethernet Port and IP Networks The Ethernet port on the MPRT serves three very valuable purposes lt is the highest speed communication port in the MPRT unit This port maybe used to download large blocks of data into the unit lt is used to download digital samples for DFR playback download software firmware updates and future use in automated substations using the IEC 61850 standard Since each output channel is capable of storing up to 256 000 samples of Digital Data such as in Digital Fault Recordings for DFR playback and with up to eight channels that equals over 2 million samples Using the RS 232 port would take several minutes to down load at a 9600 baud rate The MPRT has selectable baud rates up to 115 200 which would reduce t
112. ere is a problem with the relay which prevents the relay from reclosing the breaker then the output voltage will remain on assuming an AC or DC voltage was set in the Setting Screen until the Lockout Time has expired When the Lockout Time has expired all outputs will turn off and the test will be aborted 7 Press the Timing Test Button this will take you to the Reclose Timing Test Screen Press the Start Button in the lower left corner see Figure below The test set closes the 52A contacts and opens the 52B contacts simulating the first trip operation Each time the relay closes it s reclose contacts the reclose time is recorded and displayed The test set toggles the contacts simulating the breaker reclosing and then delays the contacts from opening for the Delay Time between each reclose operation Reclose Timing Test Settings Test Frequency 60 Hz Relay Setting Trip Time 0 0000 0 0000 0 0000 Reclose Time 000000 00000 00000 3 Trip Time 0 0000 0 0000 Reclose Time 0 0000 Timer setup TI T2 Figure 84 Reclose Timing Test Settings Screen 8 When the relay goes to lock out the test is stopped and the total number of operations is displayed including Trip Delay Time and Reclose Times 143 3 8 8 3 3 Testing Distribution Relays with Trip Reclosing and Sequence to Lockout From the MAIN MENU Screen select RECLOSING RELAY The following screen should be displayed Reclose Test Menu Test Frequency 60 Hz
113. et amp Seal In Settings button will change screens and will allow changes to meet the manufacturer s specifications e The Pickup Settings button will change screens and will allow changes to meet the manufacturer s specifications e Relay Tap Time Dial Normal Voltage Reset Time Target Tap IEEE curve type Error test multiple s and Operation Time s need to be set unless factory defaults are used e The Timer Setup screen allows the user to define how the time will be used e The IEC curves are algorithms and must be selected by the operator using the Time Curve pull down button e For inverse time curves the IDMT characteristic available on each stage is defined by the following formula o K M 1 Where K Time multiplier setting e g Vo rms etc T Operating time in seconds _ Residual voltage Setting voltage NOTE The Residual and Setting voltages will need to be furnished if performing a definite time test e For under voltage inverse time delay the under voltage elements may be programmed to have an inverse time delay characteristic The under voltage delay set point defines a family of curves as illustrated by the following equation T D 1 V Vo 83 Where T Operating Time D Under voltage Delay Set point V Voltage as a fraction of the nominal VT Secondary Voltage Vou Pickup Level NOTE The Under voltage Delay Set point Voltage and Pickup Level voltage will need to be furnished if performing
114. face contains three user interfaces in one unit a color LCD alphanumeric display panel a control knob and a touch panel used to input data into the unit The TVI will display all active generator settings in red and all inactive generator OFF settings in green If an entered value is out of range the display will be yellow and an Error Screen will appear The control knob will change the contents after the value is highlighted by touching the display with your finger NOTE The unit contains factory default values to run a quick test without entering data However a one time warning message will notify the user the test is being conducted with factory default values if the defaults are used 47 3 8 1 Touch View Interface Graphical User Interface 3 8 1 1 Main Menu Screen The main screen is used to access the four normal operating modes and an optional external high current amplifier connection if this option is purchased Test Frequency 60 Hz Manual Tests System Config Pre set Tests Metered Display File Manager Ext High Current Amplifier Figure 28 Main Menu Screen The Manual test screen performs all testing manually The Pre set test screen option provides a variety of preset relay specific test routines The File Manager allows access to the stored data files The System Config button allows changes to the system and screen defaults The Metered Display allows the viewing of the actual output and input values as me
115. gle in the lagging direction by an additional 30 then the Watts output changes Using the formula V1 V3 11 COS 30 V3 V3 13 COS 30 Total Watts Where Y is the incremental angular change of 30 between V1 and l1 and V3 and 3 120 00 V3 2 793 COS 30 30 120 00 V3 2 793 COS 30 30 then Total Watts 283 7099 580 5142 or 864 22 Watts Note All of the calculations are very similar when testing VAR 2 Element transducers The primary difference is replacing the COS function with the SIN function For the example above 146 120 00 V3 2 793 SIN 30 30 120 00 V3 2 793 SIN 30 30 then 502 7397 0 502 74 VAR Note For apparent power VA transducers the calculations remain the same except there are no COS or SIN functions For the example above 120 00 V3 2 793 120 00 V3 2 793 1161 03 VA 3 8 10 7 5 Watt VAR 2 1 2 Element This transducer is normally used in three phase four wire Wye applications which requires 2 voltages and 3 currents to test The two voltages and three currents are all refernced to ground The MPRT will automatically select two voltage and three current channels V1 V3 11 12 and I3 The test will initially start at the default voltage value that is set in the Default Setting Screen for each Voltage output Thus for a default voltage setting of 120 volts V1 will be set to 120 Volts at an angle of 0 and V3 will be 120 Vol
116. he download time The Ethernet port on the MPRT would download the same data in less than 1 second In addition to high speed downloads of DFR data the port is also used to talk the MPRT unit via a Network Through the Ethernet port the MPRT integrates into a network just like a PC or server Being able to talk to the unit via a Local Area Network LAN is a very important feature of the MPRT unit since it allows the user to automatically upgrade the unit software firmware through the internet This means that it may not be necessary to return the unit to the factory for firmware upgrades This saves time money and provides the latest in new added features or firmware updates with the push of a single button In addition this makes the MPRT suitable for future use of the IEC 61850 standard and the automated testing of IED s through the substation s Local Area Network To use this feature requires the user to setup the IP configuration of the MPRT for their LAN This will probably require assistance from the company s information management department the department responsible for maintaining your company s network The information that is needed to setup the MPRT for automatic download of firmware upgrades is the Default Gateway address and an IP address for the MPRT unit All this information should be available from your information management department 157 6 2 1 Setting MPRT IP Address Dialog Box The required Gateway and IP addre
117. he pre fault state and the range is 0 0 to 999 9 milliseconds The factory default is 100 0 milliseconds The bottom of the screen has common buttons Test Menu This selection will return the controller to the Test Menu Screen Main Menu This selection will return the controller to the Main Menu Apply This button will set and apply the pre fault values 3 8 2 4 Impedance Relay Reach Test Result Screen This screen displays the test results The Zone and Fault values are copied from the setting screen while all other values are calculated from the test results The results of the test will be displayed as Test Passed or Test Failed No data may be entered in this screen 0 000 0 000 COW ohms 0 000 120 0 0 000 2 1 000 EE A Moo 0 000 Figure 34 Reach Test Screen The bottom of the screen has common buttons File This selection will take the user to the File Manager 94 Batt Sim Off Batt Sim On This selection will turn the Battery Simulator On and Off Test Menu This selection will return the controller to the Test Menu Screen Main Menu This selection will return the controller to the Main Menu Start Stop This selection will apply the set quantities displayed and begin the test After Start is pressed this button will turn red and display Stop Pressing Stop at any time will stop the test and turn the outputs off 3 8 2 5 Impedance Relay Test Timing Settings This screen se
118. he transducer is 0 996 mA dc Based on a Max value of 1 mA equals 500 Watts the displayed Watts in the Transducer Output section of the Transducer Test Screen should read 500 0 996 498 0 Watts The Accuracy displayed in the Transducer Output section would be equal to the following 498 0 499 96 499 96 100 accuracy or 0 392 If this were a 0 5 transducer then the firmware would compare the accuracy values between the Setting Screen and the Test Screen and would display PASS in the Transducer Output section of the test screen If this were a 0 2 then it would display TEST FAILED Note All of the calculations are very similar when testing VAR 1 Element transducers The primary difference is replacing the COS function with the SIN function For example let us assume that the test angle for the VAR transducer is 30 degrees This is an important point since if they were in phase the SIN of 0 is O thus the Var contribution is O at the in phase condition Only rotating the phase angle 30 degrees do we create the measured output VAR s would be 120 01 4 166 SIN 30 249 98 VARs Note Calculations for VA transducers are the same except there are no COS or SIN functions Therefore the apparent power VA calculation is simplified as Volts Amps For example for the calculation above the apparent power is 120 01 4 166 499 96 VA 3 8 10 7 2 Power Factor 1 Element The single element power factor transducer
119. hronization between two voltage channels normally used to time auto synchronizing relays 19 1 5 2 Binary Outputs Timer There are 6 internal outputs and 10 optional external outputs for the unit The contacts can switch up to 300 VAC 1 Amp or 250 VDC 1 Amp continuous The contacts may be to open or closed thus simulating circuit breaker operation The programmable wait duration is from 1 millisecond to 10 000 milliseconds 1 6 Battery Simulator The receptacles provide 24 48 125 or 250 VDC with current limiting protection The primary application is to provide DC logic voltage to solid state and microprocessor relays CAUTION the LCD touch panel or via software command Do not plug or insert any test lead into the BATTERY SIMULATOR binding posts without first connecting the test leads to the load A NOTE DC voltage is ON and available when the output is turned on using 1 7 Transducer DC IN Measuring Circuit The DC measuring circuit s voltage is from 0 10VDC and current from either 0 1mADC or 1 to 20mADC This circuit is used for testing transducers See Section 3 8 10 4 for more description 1 8 Operation of Optional High Current Interface The High Current Interface may be initiated in the Main Menu Screen The High Current Interface button is located at the bottom of the TVI When initiated the High will change to Unit I When a relay test is completed and the HIGH CURRENT INTERFACE is no longer re
120. ic Restraint Test Results This screen displays the results upon test completion No data may be entered in this screen Differential Harmonic Restraint Test Settings Test Frequency 60 Hz Mag Amps Angle Frequency Hz Timer setup T3 Figure 53 Differential Harmonic Restraint Test The bottom of the screen has common buttons File This selection will take the user to the File Manager Batt Sim Off Batt Sim On This selection will turn the Battery Simulator On and Off Test Menu This selection will return the controller to the Test Menu Screen Main Menu This selection will return the controller to the Main Menu Start Stop This selection will apply the set quantities displayed and begin the test After Start is pressed this button will turn red and display Stop Pressing Stop at any time will stop the test and turn the outputs off A timer setup link is available on this screen Also the Timer Setup configuration is displayed for convenience The status of the relay contact will be displayed on the screen real time along with the value of the current The calculated Start and Stop current can also be seen on the test screen The Stop current is the maximum current provided by the test set before test is stopped This instance is applicable if the relay does not operate when ramping the current up between the Start and Stop values For this test a fundamental frequency current is provided from the test set along with
121. ight will illuminate once contacts close or voltage is applied to the gate If desired a tone generator horn may provide an audible indication when the contacts close or voltage is applied 1 5 1 1 1 Dry Contacts Open Timer starts stops or a continuity indicator goes out at the opening of normally closed contacts or when conduction through a semiconductor device such as a triac or a transistor is interrupted 1 5 1 1 2 Dry Contacts Close Timer starts stops or a continuity indicator glows at the closing of the normally open contacts or upon conduction through a semiconductor device such as a triac or a transistor 1 5 1 1 3 Application or Removal of AC or DC voltage This will either start the Timer or stop the Timer The continuity indicator will glow application or darkens removal upon the application or removal of either an AC or DC voltage A higher threshold voltage helps to eliminate false triggers due to a noisy source Lower thresholds allow starting and stopping of timer from TTL voltage signals The allowable voltage applied is 5 to 300 Volts AC or 5 to 300 Volts DC current limiting resistors provide protection 1 5 1 1 4 The Timer can be started when turning on any selected generators 1 5 1 1 5 The Timer can be started simultaneously with a change in Frequency Phase Angle or Amplitude Also it can be started simultaneously with a Voltage or Current waveform step 1 5 1 1 6 The Timer can be stopped upon Phase Sync
122. ill return the controller to the Main Menu This selection will apply the set quantities displayed and begin the test After Start is pressed this button will turn red and display Stop Pressing Stop at any time will stop the test and turn the outputs off 3 8 2 3 Impedance Relay Pre fault Setting Screen This screen sets the relay values before fault values are applied to ensure the relay is properly energized Prefault Setting Test Frequency 60 Hz Current Angle Current Lags Voltage 75 00 Time 100 0 Figure 33 Pre Fault Setting Screen e The voltage range is 0 00 to 150 0 volts This value may be set to two decimal places i e 69 28 with a pull down menu that provide values of 57 735 63 51 69 28 110 0 and 120 0 volts e The voltage can be set phase to neutral N or phase to phase 4 4 with a factory default voltage of 69 28 AN e The current range is 0 00 to 9 99 amps with the factory default setting of 3 00 amps e There are two parts to defining the angle The first part is set in the System Default Screen where the angle entry is defined as leading or lagging Lagging value range is 0 to 360 53 and the lead lag value range is 180 to 180 The factory default is set to 75 lagging The second part is the value with a range of 0 0 to 999 9 If the user selects 180 range the user will only be able to enter a value of 180 e The time entry determines how long the relay will stay in t
123. ill return the controller to the Main Menu Start Stop This selection will apply the set quantities displayed and begin the test After Start is pressed this button will turn red and display Stop Pressing Stop at any time will stop the test and turn the outputs off 3 8 9 3 Frequency Relay Target amp Seal In Test Screen This screen displays the results upon test completion No data may be entered in this screen 120 Frequency Seal in Test Test Frequency 60 Hz relay setings NOTES TO OPERATOR Observe when contacts are clo Depress the Start key to energize the relay sed and press star Start File Test ai Main Menu Menu Figure 92 Frequency Relay Target and Seal in Test e The Timing Settings button will change screens and will allow changes to meet the manufacturer specifications e The Pickup Settings button will change screens and will allow changes to meet the manufacturer specifications The bottom of the screen has common buttons File Batt Sim Off Batt Sim On Test Menu Main Menu Start Stop This selection will take the user to the File Manager This selection will turn the Battery Simulator On and Off This selection will return the controller to the Test Menu Screen This selection will return the controller to the Main Menu This selection will apply the set quantities displayed and begin the test After Start is pressed this button will turn red and display Sto
124. in a change of power factor from a 500 to 1 000 A change from 12 to 20 mA is equal to a change in Power Factor from 1 0 to 500 Therefore a change in Power Factor of 0 1 is equal to a change in output current of 1 6 milliamperes Since the error of some Power Factor transducers are rated to 0 015 PF then we need to carry out the Power Factor to three decimal places or 001 Therefore if the transducer had a measured output of 9 500 mA then the equvilent Power Factor output would be 9 500 4 000 5 500 mA increase above 4 mA 5 500 mA 1 600 mA 0 1 PF 0 34375 PF increase above 500 PF adding 500 0 343 843 PF And if transducer had a measured output of 15 200 mA recall anything over 12 mA is a decreasing Power Factor going from 1 0 to 500 then the equvilent Power Factor output would be Calculating towards the midpoint 20 mA 15 2 mA 4 8 mA 4 8 1 6 1 300 With 20 mA 5 PF then adding 3 PF results in a 800 PF output value Accuracy The accuracy value for the transducer is entered here The default value is 0 500 To enter another value the user touches the value window and a keypad allows another value to be entered 138 3 8 10 5 Manual Transducer Test Screen Manual Transducer Test Screen Test Frequency 60 Hz Mag Freq 120 000 60 000 120 000 60 000 120 000 60 000 120 000 60 000 0 417 0 000 60 000 0 417 120 000 60 000 0 417 240 000 60 000 EEE Ou OH
125. ing Screen DONOODadda AHHH ASO Eee en ES Figure 9 TVI Alphanumeric Keyboard 2 2 2 Control Knob The control knob will change the values after touching the display to highlight the value that requires ramping Clockwise rotation increases and counterclockwise decreases The control 22 knob uses a speed control algorithm to provide fine adjustment with a slow rotation and a larger step adjustment with a faster rotation 2 2 3 Factory Defaults There are several factory default settings including language system frequency phase angle rotation battery simulator GPIB address IP address brightness and contrast unit and V I Gen serial numbers and the color palette Pressing the System Config button on the Main Menu will result in the following System Configuration Default Vollage GPIB Address Date amp Time Default Cem Sertal Port Aboul EE F EE IP Address Brightness DU HE 0 0 3 Briqhiness Phase Angle Bal ery Simulator Color Palette 0 360 Lead l E 24 Volts DE Mir Bill D den Convertible Vd Control Figure 10 Default System Configuration Screen 2 2 3 1 Language The factory default is English but may be changed to French Spanish German Italian or Portuguese Other languages will be added to the list at a later date To change language press the language select button on the Main Menu Screen see Figure 7 2 2 3 2 Color Palette The background and color scheme is adjustable
126. ion which is the simplest of dynamic frequency timing tests The Step changes from the normal operating frequency set in the Prefault and changes to the fault frequency setting in the Fault setting screen When Dynamic Enabled and Hz S or Ramp is selected these value windows are used to set changes in output frequency If a Step function is used the Delta 1 and 2 are greyed out and not used When Hz S is selected both Delta 1 and 2 are accessible If Ramp is selected only Delta 1 is programmable This selection will display the Timer Setup menu The Dynamic Enabled button will simulate four fault conditions Prefault Fault and Postfault and progress through each state condition The Timer will start when the unit progresses from the Prefault to the Fault condition and will stop when the first stop contact reaches a true condition or when the Fault Duration has elapsed If the Dynamic Disabled selection is displayed the system will not progress through the Prefault Fault and Postfault operations This selection will apply the set quantities displayed and start the timer or not start the timer depending upon Timer Start selection If the Dynamic Enabled button is selected the unit will progress through the Pre Fault Fault BKR Open and Reclose operations The Start button will always reset the timer to zero After Start is pressed this button will turn red and display Stop Pressing Stop at any time will stop the test and t
127. ired restraint current that will be used in the slope test The Selection is either electromechanical or solid state If solid state is entered the user will be required to press the stop button when the relay Slope 30 The default value is 25 Restraint default value is 10 Amperes Relay Type LED lights up upon pickup Polarizing Some electromechanical relays require a polarizing current be applied prior to conducting pickup tests Enter the desired polarizing current The default value is 50 Amperes Through Fault This will be the current applied in the through fault test Consult relay manufacturer literature for appropriate test current value Default value is 20 Amperes Target Tap amperes Relay Model Cal The Target Tap has selectable values with a factory default of 0 2 DC The Westinghouse HU relay requires a different calculation for harmonic restraint If testing an HU select HU the default is All Other Inst Tap mperes Test Configuration Enter the instantaneous trip current value The default value is 40 This will take the user to a new screen It was added to simplify the Relay Settings screen The Test Configuration Screen provides additional input parameters for more complex tests and for adjusting ramping and pulse ramping values The bottom of the screen has common buttons File Test Menu Main Menu Test Configuration This selection will take the user to th
128. lect the first two voltage and current channels available V1 V2 11 and 12 The voltage input to the transducer is supplied with one voltage input terminal However we must take into account that the transducer is connected using a PT that is connected line to line Thus the test will initially start at the default voltage value that is set in the Default Setting Screen for each Voltage output However the V2 output will be 180 degrees out of phase with V1 thus they add across the potential input of the transducer For example a default of 120 Volts L N means 240 Volts will be impressed across the transducer potential input terminals Thus V1 will be set to 120 Volts at an angle of 0 and V2 will be 120 Volts at 180 11 and 2 will be in phase with their respective voltages 0 and 180 When the user inputs the MAX Watts value in the Transducer Setting Screen the firmware can calculate the required test currents for full scale value The formula required to calculate Watts for 1 1 2 Element transducer is V1 11 COS V2 12 COS Y Watts Example The default voltage is 120 00 Volts AC and the user inputs 1000 Watts as Max Value The current required for full scale output from the transducer is 120 11 COS 0 120 12 COS 0 1000 Watts Since each phase contibutes half of the power we can simplify to 11 500 Watts 120 Volts or 11 12 4 1667 Amperes Therefore when the user inputs 1000 Watts in the MAX valu
129. lection will take the user to the File Manager Batt Sim Off Batt Sim On This selection will turn the Battery Simulator On and Off Manual Test Menu This selection will return the controller to the Manual Test Menu Main Menu This selection will return the controller to the Main Menu Testing Synchronizing and Auto Synchronizing Relays To perform tests on synchronizing type relays requires the use of two voltage output modules Pick up or Closing Angle Test This test is performed with Dynamic Disabled With the Dynamic test disabled the user may manually adjust the phase angle using the control knob to determine the closing angle The output voltages and frequency will be the values set in the System Configuration Screen To perform Pick up or Closing Angle tests let one voltage channel be the 0 reference i e V1 and let the second voltage channel provide the variable phase angle adjustment i e V2 This test requires phase angles indicated on V2 will be a leading angle this requires 180 degree phase angle option If the relay s closing characteristic is 20 leading an angle of 20 will be indicated on voltage channel 2 assuming V1 is set to the 0 reference 133 1 With V1 and V2 set to Normal Voltage e 120 Volts each and 60 Hz for 60 hz relays turn outputs on by pressing the Start button 2 The user selects V2 Angle and sets it to Ramp Using the control knob Ramp V2 phase angle in the CW directi
130. lose Ops Brk Time Figure 75 Reclosing Relay Setting Screen e The Timing Settings button will change screens and will allow changes to meet the manufacturer specifications e Relay Tap Time Dial Number of Operations Target Tap IEEE Curve Type Reclose Operations Reclose Time and Lockout Time to be set unless factory defaults are used e The number of Reclose Ops will be one less than the No of Operations The time setting for Reclose Time will be the same for each operation The lockout time is the time that a lockout should occur unless a trip has occurred again e The Timer Setup screen allows the user to define how the time will be used The bottom of the screen has common buttons File This selection will take the user to the File Manager Test Menu This selection will return the controller to the Test Menu Screen Main Menu This selection will return the controller to the Main Menu 104 3 8 8 2 Reclose Relay Pickup Test Setting Screen Power Pickup Test Settings Test Frequency 60 Hz Mag Angle E Figure 76 Reclosing Relay Pickup Test Setting Screen In the Pickup Setting Screen the user may select single or three phase voltage and current e The Timing Settings button will change screens and will allow changes to meet the manufacturer specifications The bottom of the screen has common buttons File This selection will take the user to the File Manager Batt Sim Off Batt Sim On
131. loses the 52A contacts and opens the 52B contacts simulating the first trip operation Upon sensing the relays reclose on BINARY INPUT 2 the reclose time is recorded and displayed The test set toggles the contacts simulating the breaker reclosing and then reapplies the fault current This is repeated based on the NO of Operations that was entered in the setting screen 146 Figure 88 Single Phase Trip and Reclose Test Results 16 When the relay goes to lock out the test is stopped and the total number of operations is displayed including Trip Times and Reclose Times 147 3 8 9 Frequency Relay Test Menu This menu permits the setting and testing of a frequency relay These tests should be conducted in accordance with the manufacturers relay specifications Frequency Test Menu Test Frequency 60 Hz Relay Settings Timmins Target Pre set Tests Main Menu Menu Figure 89 Frequency Relay Test Menu Screen There are several options to further define the tests to be performed Selecting one of these options will present the test setup screen for that option and e For electro mechanical relays the user needs to have only one set point set the time dial and step e For solid state relays there may be multiple set points used multiple timing either step and or ramp that may be a single or double step ramp A double step ramp usually measures the rise and fall time duration This test process measures the delta fr
132. lts This screen displays the results upon test completion No data may be entered in this screen Synchronous Timing Test Settings Test Frequency 60 Hz Relay Settings Auto Sync Figure 67 Sync Relay Timing Test Screen e The Relay Settings button will change screens and will allow changes to meet the manufacturer specifications The bottom of the screen has common buttons File This selection will take the user to the File Manager Batt Sim Off Batt Sim On This selection will turn the Battery Simulator On and Off Test Menu This selection will return the controller to the Test Menu Screen Main Menu This selection will return the controller to the Main Menu Start Stop This selection will apply the set quantities displayed and begin the test After Start is pressed this button will turn red and display Stop Pressing Stop at any time will stop the test and turn the outputs off 93 3 8 7 Power Relay Test Menu This menu permits the setting and testing of a power relay These tests should be conducted in accordance with the manufacturers relay specifications Power Test Menu lest Frequency 60 Hz Timing Target Seal in File Pre set Te sis Main Menu Menu Figure 68 Power Relay Test Menu This menu permits the setting and testing of a Power relay These tests should be conducted in accordance with the manufacturers relay specifications The bottom of the screen has common buttons File This s
133. ly the set quantities displayed and begin the test After Start is pressed this button will turn red and display Stop Pressing Stop at any time will stop the test and turn the outputs off 3 8 2 8 Impedance Relay Angle of Torque Test Results Screen This screen displays the results upon test completion The Zone and Fault values are copied from the setting screen while all other values are calculated from the test results The results of the test will be displayed as Test Passed or Test Failed No data may be entered in this screen Angle 0 000 Angle 0 00 AM Zone Degrees Error AG Faull Tl Unknown Unknown nown Open CW 45 00 CCW 45 00 MTA 0 000 l Test In Progress esel Filo Test Menu ay koe a h e AOS Figure 38 Angle of Torque Test Screen The bottom of the screen has common buttons File Batt Sim Off Batt Sim On Test Menu Main Menu This selection will take the user to the File Manager This selection will turn the Battery Simulator On and Off This selection will return the controller to the Test Menu Screen This selection will return the controller to the Main Menu 99 Start Stop 60 This selection will apply the set quantities displayed and begin the test After Start is pressed this button will turn red and display Stop Pressing Stop at any time will stop the test and turn the outputs off 3 8 2 9 Impedance Relay Target amp Seal I
134. mp Specifications Increment This value is used to control the how fast the MPRT will increase the current to determine the Instantaneous pickup value The value input into this field is in increase per pulse The default value for this field is 1 of pickup Example If the pickup value requires 10 amperes the MPRT will increase the current magnitude 0 1 amperes for the Pulse Time On value until the relay contacts close For smaller increments use a smaller percentage 13 Pulse Time On cyc Pulsar Time Off cyc Target amp Seal In Ramp Specifications Increment 100 msec Relay Settings This value is used to control how long the output pulse is on during an Instantaneous pickup test This value is in cycles This value is used to control how long the output pulse is off during an Instantaneous pickup test This value is in cycles This value is used to control the how fast the MPRT will increase the current to determine the pickup value for the target and seal in The value input into this field is in increase per 100 msec The default value for this field is 1 of pickup Example If the pickup is set for 2 0 amperes the MPRT will increase the current magnitude 0 02 amperes every 100 msec until the relay seal in contacts close The Relay Settings button will return the user to the Relay Settings Menu 74 3 8 4 2 Differential Relay Winding 1 2 or 3 Pick Up Test Results This screen displays the results
135. n seconds or cycles This selection will display the Complex Timer Setup menu This selection will reset the timer to zero This selection will return the user to the screen previously displayed 46 Complex Timer Setup Menu Description Input O Latch On seconds Bin Out SCC RODRA Bin Out SHO SOU Figure 27 Complex Timer Setup and Binary Output Screen Up to 16 different timers are available using the button labeled T1 This button will present a pull down menu to select the required timers This screen will be used by the default screen to set system defaults The time selection when used from the default screen will set the time base for all screens If seconds are selected all screens will set Duration Op Time and Pulse Time to indicate seconds or milliseconds as applicable If cycles are selected the time base will be set to cycles When this display is called from a setup screen the time base for the timer in that screen may be changed 3 7 Battery Simulator There are two distinct buttons for the Battery Simulator the Volts DC and value settings The Battery Simulator output voltage can be set to 24 48 125 or 250 volts DC with the factory default set at 125 VDC This establishes the voltage values but does not turn the Battery Simulator power ON The various test setup screens will allow the Battery Simulator to be powered ON as applicable 3 8 Relay Testing The Touch View Inter
136. n Test and Results This screen displays the results upon test completion The results of the test will be displayed as Test Passed or Test Failed No data may be entered in this screen impedance Seal in Test Test Frequency 60 Hz Mag Freq NOTES TO OPERATOR Observe when contacts are closed and press Start Depress the Start key to begin ramping Depress the Stop key when the element operates Test Config Figure 39 Impedance Target and Seal in Test Screen The bottom of the screen has common buttons File This selection will take the user to the File Manager Batt Sim Off Batt Sim On This selection will turn the Battery Simulator On and Off Test Menu This selection will return the controller to the Test Menu Screen Main Menu This selection will return the controller to the Main Menu Start Stop This selection will apply the set quantities displayed and begin the test After Start is pressed this button will turn red and display Stop Pressing Stop at any time will stop the test and turn the outputs off 61 3 8 3 Overcurrent Relay Test Menu This menu permits the setting and testing of an Overcurrent relay These tests should be conducted in accordance with the manufacturers relay specifications There are two different curve types IEEE ANSI and IEC which are user selectable on the various screens Overcurrent Test Menu Test Frequency 60 Hz 3 Se Timing Target amp Seal In File Pre set
137. n V1 and all output current channels and V1 to all voltage channels Connect appropriate outputs from MPRT to the Phase Angle Meter Referencing all phase angles to V1 use Touch View Interface TVI to apply desired phase angle to the Phase Angle Meter When testing current use load box to convert current to voltage for input into the North Atlantic Phase Angle Meter In place of the load box and the North Atlantic Phase Angle Meter a Megger Model PMM 1 may be used to measure the phase angle of the current directly However the error of the PMM 1 0 05 degrees must be added to the total allowable error the North Atlantic Phase Angle Meter measures angles between two voltages with an error of 0 0125 Degrees MPRT readings will be displayed on Touch View Interface TVI Start with angles between voltage outputs V1 reference and V From Main Menu press the Manual Tests display button Press the Voltage Current button Using the TVI select two voltage output channels by pressing V1 reference and then either V2 V3 or V4 Note The unit is modular and may not have four output modules installed Set the output voltage 120 Volts for each output voltage channel To set an output value press the Magnitude window and enter the desired value Set the phase angle to the desired voltage channel V2 V3 or V4 as listed in the following Table and initiate the output by pressing the Start button The selected output indicator will change from Green to R
138. n and the Test Screen and would display PASS in the Transducer Output section of the test screen Note All of the calculations are very similar when testing DC Voltage transducers 3 8 10 8 2 AC and DC Current Transducers The single phase AC or DC current transducer requires 1 current to test The MPRT will automatically select the first current channel available 11 The test will initially start at the default value current that is set in the Default Setting Screen For example 5 Amperes When the user inputs the MAX Current value in the Transducer Setting Screen the firmware will automatically set the test current for full scale value Note to power up the amplifier of some transducers V1 may be selected to provide the AC voltage source Remember to select the proper output voltage for V1 it will be set to the System Default value in the setting screen Example The default current is 5 Amperes AC and the user inputs 5 Amperes AC as Max Value Therefore when the user inputs 5 Amperes in the MAX value window the test set should automatically show a test current value of 5 000 Amperes at an angle of 0 Note the DC current transducer is identical except instead of 50 or 60 Hz as the default output frequency the display changes to read DC When the test is Started the measured test current output is displayed in the Transducer Test Screen under the MPRT Output next to the Label of AC Current or DC Current Another value of Curre
139. n the Reclose Relay Test Screen until the relay goes to a lockout state after the 4 reclose state as is in this example The test set will record the reclose times for each individual reclose operation no trip times are recorded for the reclose only relay See next figure for example test screen 107 Hecioje Tena Fesi Settings Test Frequency 0 Hz Rate Setas Mis ds VI LIN Ming olla I Fa l inp Tena EN UL LTE 0 Cri UL THO Hechos Dare 00543 00543 1543 1543 L f A d me Tee 0 000 OL CHI LOS 0 000 Haine Ti ARC et D IO AL OUR AL 000 Figure 78 Reclose Only 4 Shot Reclose Timing Test The following graphic displays the reclose contacts the breaker simulator contacts and the delay time between contact operations for Reclose Only relays Reclose Only Timing Test Using MPRT A E D DE bai Ci fa lesen tat H To Ri S R2 5 R3 5 R4 Lock Out R Relay Reclosing Contacts D Delay Time amp TO Start of Test A Normally Closed Contacts Restar Timer R1 R4 Recorded Reclose Times B Normally Open Contacts Trip amp Reclose Relays Some of the new distribution protection relays require an AC current to simulate an overcurrent condition as well as circuit breaker simulation for the reclose operation Trip and Reclose In this case as well as the electronic ME recloser two tests are normally performed One test is the pickup test or minimum operation point This test is performed same as the Overcurrent Picku
140. nd current or two three phase open delta voltages with four currents or up to eight phases of current The first four phases are indicated by V1 11 V2 12 V3 13 and V4 l4 Once the voltage generators are converted to current generators they will change as indicated below V1 gt 15 V2 gt 16 V3 gt I7 V4 gt 18 9 TVI Connector connects the Touch View Interface to the unit Used for manual operation and display outputs when under computer control 1 1 2 Rear Panel Figure 2 MPRT Rear Panel 1 Incoming Power Line Cord the input line cord ground terminal are mounted on the back panel of the test set Input Line Cord The test set is equipped with a line cord see the accessory kit which connects to the male plug on the back panel Verify the input voltage A before connecting the line cord to the power source NOTE The unit can be powered from an input source with a rating of 100 VAC to 240 VAC The unit automatically adjusts to the available power if it is within the specified range 2 Earth Ground Jack use this terminal to connect chassis ground to earth ground A chassis ground earth point on the back panel is provided as an AN additional safety ground 12 3 RS 232C Serial Port The serial port can operate at a maximum baud rate of 115 200 and will send receive data in a serial fashion See section 2 2 3 8 for more description d IlEEE 488 GPIB The IEEE 488 GPIB port enables the unit to f
141. nded by the manufacture is 0 Therefore If the relay pickup setting is 1800 Watts and the relay voltage is 120 Volts then we would expect the relay to operate at about 5 0 Amperes 3 120 5 1 Cosine 0 1800 Watts For our final example relay consider a loss of excitation relay connected phase to phase voltage and single phase current that is calibrated in watts The formula Voltage o Current Cosine 0 V3 would be used to calculate Watts In this test case the manufacture recommends testing the relay using a single phase voltage and a single phase current The Voltage applied will be the voltage entered in the Normal Volt window The phase angle relationship recommended by the manufacture is 60 Therefore if the relay pickup setting is 75 Watts and the relay voltage is 120 Volts then if the relay operates at 2 16 Amperes 120 2 16 Cosine 60 74 91 Watts V3 Relay Type This setting selects whether the relay is a solid state or electromechanical relay If solid state is selected then there are no available contacts for the pick up test The user must press Stop when the pick up LED illuminates Test Multiple Time These settings determine at what power multiples the timing test will be performed Common test multiples are 2 4 and 6 The user enters the desired multiple and the appropriate operating time for that multiple For example if the relay to be tested has a tap setting of 40 Watts and the user selec
142. nels available V1 V2 V3 and l1 12 13 The test will initially start at the default values for voltage and current that are set in the Default Setting Screen For example 120 Volts L N 5 Amperes at their respective phase separations of 120 Degrees note that for three phase Power Factor transducers the transducer requires a balanced three phase output The calculated Power Factors will be based on the phase separation between V1 and l1 The Power factor transducer has a range of operation that correlates to the Leading or Lagging phase angle relationship between the voltage and current inputs Therefore when the user selects Power Factor 3 Element the MIN and MAX nomenclature will change to read LEAD and LAG power factor values The user is required to input the LEAD and LAG power factor values into the provided spaces normally the same values i e 0 5 The power factor is the trigonometric decimal equivalent value of the COS of the angle between the V1 voltage and l1 current For example when the user inputs the LEAD and LAG Power Factor values in the Transducer Setting Screen the firmware can calculate the required test angles for full scale values Thus for a LAG Power Factor value of 0 5 the current would need to lag the voltage by 60 The Lead and Lag phase angles require that the vector display be changed to show angles as 180 If the default angle representation is 0 to 360 LAG then the angle between the voltage and cur
143. ng a failure in the MPRT review the Description of Controls and Theory of Operation sections to ensure that the problem is not a result of operating error Preliminary testing of the MPRT within its specified limits can help determine if a malfunction actually exists identify the type of malfunction and define the general area of the failure Common causes of malfunctions other than improper operation are incorrect power input voltage above or below specified limits incorrect test signal voltages applied to the Binary Input Timer Monitor Start Stop gates outside of the specified AC DC Applied Removed limits and contact or circuit resistance too great for the Dry Contact gates to operate properly on the Monitor Start Stop gates Typical malfunctions for the VI Gen amplifiers are external short circuits on the voltage output and open circuits on the 159 current output The battery simulator and Vl Gen voltage and current outputs can be easily checked using a voltmeter and ammeter H NOTE Proper ESD procedures should be followed when handling any MPRT module Failure to do so may damage sensitive parts 6 3 1 2 Power Input Input voltage affects the whole unit and may or may not cause permanent damage if voltage is incorrect These problems can often be corrected by simply using a better source of input power The rated voltage limits is auto selectable from 100 to 240 volts 47 to 63 Hz Some symptoms are as follows Low volt
144. ngle Tests To perform Pick up or Closing Angle tests let one voltage channel be the 0 reference i e V1 and let the second voltage channel provide the variable phase angle adjustment i e V2 This test requires phase angles indicated on V2 will be a leading angle this requires 180 phase angle option If the relay s closing characteristic is 20 leading an angle of 20 will be indicated on voltage channel 2 assuming V1 is set to the 0 reference Set V1 and V2 to Normal Voltage i e 120 Volts each and turn outputs on Ramp V2 phase angle in the CW direction lagging the reference voltage At some point a set of contacts may open thus allowing the user to determine the dropout angle 20 If the user selected Normally Closed open he could automatically capture this angle The user could set the starting angle of 30 for V2 thus the contacts would not be closed If we started the ramp at this point the angle would continue to 180 Then the sign would change to When the relay Normally Open contacts closed we would capture the closing angle i e 20 We would then compare the actual closing angle to that specified in the Relay Setting Screen and calculate the error in degrees Setting Advance Time To perform this test let voltage channel 2 V2 provide the slip frequency generator and let voltage channel 1 V1 provide the fixed voltage frequency source bus Connect the relay s closing contacts to Timer Star
145. nt gets calculated using the measured dc Volts or dc milliampere output as displayed in the Transducer Output section Let us assume that in our example transducer the output is in dc milliamperes For this example let us say that 20 milliampere of dc current from the transducer is equal to the full scale output of 5 153 Amperes Therefore the theoretical output Current from the transducer would be 5 Amperes if the transducer output current is 20 milliampere For this example let s say that the measured MPRT output current is 5 001 For this example let s say that the measured output current from the transducer is 19 9991 mAmperes Based on a Max value of 20 mA equals 5 Amperes the displayed AC Amperes in the Transducer Output section of the Transducer Test Screen should read 4 9997 Amperes If 20 mA 5 Amperes or 0 25 A 1 mA Then 19 99 mA 0 25 A mA 4 9975 Amperes The Accuracy displayed in the Transducer Output section would be equal to the following 4 9975 5 001 5 001 100 accuracy or 0 0699 If this were a 0 15 transducer then the firmware would compare the accuracy values between the Setting Screen and the Test Screen and would display PASS in the Transducer Output section of the test screen Note All of the calculations are very similar when testing DC Current transducers 3 8 10 8 3 Frequency Transducers The frequency transducer requires 1 voltage output channel to test The MPRT will automati
146. nterface Bus IEEE 488 GPS Global Position System GUI Graphical User Interface Hz Hertz ID Identification LO Input Output kHz Kilo Hertz LCD Liquid Crystal Display LED Light Emitting Diode MAG Magnitude MHz Megahertz MTA Maximum Torque Angle NVRAM Non volatile Random Access Memory PC Personal Computer ROM Read Only Memory RS 232 Serial Communication Interface RTS Relay Test System SRAM Static Random Access Memory SSD Solid State Disk TCM Timer Control Module TVI Touch View Interface USB Universal Serial Bus VAC Volts Alternating Current VDC Volts Direct Current V I Gen Voltage Current Generator Module VRMS Volts Root Mean Square UUT Unit Under Test 1 2 2 Glossary of Terms The MPRT TVI display screens prompt the user to select or set various values The values vary depending on the relay under test and the relay setting screen Many of the terms used are similar in nature and mean virtually the same thing regardless of the type of relay For example the term Time Dial is the used to define the time dial setting on the relay under test The Time Dial could be on an overcurrent relay or just as easily be on a under voltage relay Unfortunately some of the terms described here may apply to different types of relays in different ways and thus may not cover every possible relay made However it is hoped that this glossary will help the user to understand every setting value on every relay setting screen 1 2
147. nts are to be used only connect two currents in parallel etc for three or four channels In other words do not parallel a current channel if you do not intend to use it 3 All current channels have amplitude control now operates simultaneously to provide the desired test current Selecting Ramp of the current Magnitudes will allow the user to ramp all currents at the same time using the Control Knob Total output is the sum of the current shown on the individual current channel amplitude displays 3 3 2 Currents in Series Operation Two current channels may be connected in series in order to double the available compliance voltage High impedance electromechanical ground overcurrent relays have always been difficult to test at high multiples of tap due to the winding impedance and saturation characteristics The peak voltage required can exceed the maximum output voltage of one MPRT current output channel depending on the required test current By connecting two current outputs in series the compliance voltage is doubled providing higher test currents through the load To series the current channels of the unit perform the following Using the current channel test leads connect the Red output terminals of current channel to the relay under test For floating ground units connect the two black return terminals together as shown in the following figure a For floating return units connect the black return terminals together series
148. o the binary input terminals which ever comes first and will then switch to the Reclose Settings When Dynamic Enabled is used the user enters the values for voltage current phase angle or frequency with the Duration time These values will be applied to the device under test during the post fault Reclose Duration time and will then switch outputs off 127 3 8 10 2 Manual Frequency Test Settings Screen Manual Frequency lest Settings Test Frequency 60 Hz 00000 Time Start on Frequency Ho of Repetitions a Op Time seconds Duration 3l 3 0000 _ Timer Setup T3 Dynamic Disabled File Manual Test Main Menu Menu Figure 96 Manual Frequency Test Screen Description The Manual Voltage Current Test screen is designed to permit manual output control of the MPRT and provide simple interface for basic relay testing This control screen allows the user to apply any value of magnitude phase angle or frequency to a protective relay and time the response Operation This screen can apply set values to visually watch the response of the relay or the unit can apply set values and start the timer and await a response time from a protective relay This screen can also simulate a three state conditions Prefault Fault and Postfault A relay operation time can be monitored by the timer in the Fault stage Controls V1 V4 amp 11 14 Permits control of any installed voltage V1 V2 V3 V4 or current
149. on 1 4 2 1 VI Generator Module The voltage and current ranges may be set to zero for automatic range adjustments or manually set to the number desired in volts or amps as indicated below The unit will choose the lowest range which contains the desired value 17 1 4 2 1 1 Voltage and Current Ranges 1 4 2 1 1 1 Model 8415 each output module Voltage Range Power Current Max 30 00V 150VA O 5A 150 00V 150VA O 1A Current Range RMS Power Voltage Max 4 0A 200VA O 50 0 Vous 7 5A 200VA 26 7 Vans 15 0A 200VA 13 4 Vans 1 4 2 1 1 2 Model 8430 each output module Voltage Range Power Current Max 30 00V 150VA 5 0A 150 00V 150VA O 1 0A 300 0V 150VA O 0 5A Current Range RMS Power Voltage Max 4 0A 200VAO 50 0 Vans 7 5A 200VA O 26 6 Vans 15 0A 200VA O 13 4 Vrms 30 0A 200VA O 6 67 Vous 1 4 2 1 2 Frequency Ranges The output module is able to provide a variable frequency output with the following ranges DC 00 001 to 99 999 100 01 to 999 99 1 4 2 1 3 Phase Angle The phase angle may be set from 0 to 359 9 in either lead or lag configuration clockwise or counterclockwise rotation In addition the user may select the angle display configuration of 180 See section 2 2 3 11 Phase Angle Setting for information regarding Factory Default settings 15 Timer Control The Timer can indicate the elapsed time either in seconds or in cycles The Timer is prearranged in the setup screens of the resp
150. on lagging the reference voltage At some point a set of contacts may open thus allowing the user to determine the dropout angle for example 20 The user could set the starting angle of 30 degrees for V2 thus the contacts would not be closed If we started the ramp at this point the angle would continue to 180 degrees Then the sign would change to When the relay Normally Open contacts closed we would read the closing angle i e 20 We would then compare the actual closing angle to that specified in the Relay Setting Screen and calculate the error in degrees Advanced Closing Time Test This test is performed with Dynamic Enabled To perform this test let voltage channel 2 V2 provide the slip frequency generator and let voltage channel 1 V1 provide the fixed voltage frequency source bus This test will automatically determine closing angle and advanced closing time for auto synchronizing relays la Connect the relay s closing contacts to Timer Start Terminal 1 first pair of Binary Input terminals so that when the relay contacts close at the advance angle it will start the timer and capture the closing angle at the same time 2 Set V1 to the Normal voltage output Set V2 to the Normal output voltage and slip frequency For example VOLTAGE 2 AC 120 FREQ 60 100 V2 ANGLE display should start at O degrees we want V1 and V2 to turn on at 0 degrees together 3 Press the Start button V2 will turn on in phase with
151. on returns the user to the main screen menu If the Main Menu button is selected the test will be stopped and will return the generators to an inactive state e Remove Pre Set Menu Selection 124 3 8 10 1 Manual Voltage Current Test Screen Manual Vollage Current Test Settings lest Frequency 60 Hz 69 260 Donen f 60 000 69 280 120 00 60 000 Duration 3 00 ERE 000 Trip Time 0 0000 1 0000 T2 Stop NO 1 0000 120 00 Jn 10000 LU 240 00 1 0000 f 00000 50000 E E RI Timer Selup Dynamic Timer Start Enabled Contact start File Manual Test Main Menu Menu Figure 95 Manual Voltage or Current Test Screen Description The Manual Voltage Current Test screen is designed to permit manual output control of the MPRT and provide simple interface for basic relay testing This control screen allows the user to apply any value of magnitude phase angle or frequency to a protective relay and time the response Operation The Manual Voltage Current screens can be used to time protective relays in two different modes 1 This screen can apply set values to visually watch the response of the relay or the unit can apply set values and start the timer and wait a response time from a protective relay 2 This screen can also simulate four state conditions Pre Fault Fault BKR Trip and Reclose and progress through each state condition A relay operation time can be monitored by the timer
152. ontacts closing The Latch was set On so that the timer would stop on first contact closure thus ignoring any contact bounce The Timer was defaulted to measure time in Seconds 141 Multi Timer Setup Input Input Input Input Latch Off al n Input E Input j LO CO gt oa a D a Input Input Input ES gt o Input Figure 82 Timer Input Setup Screen Pressing the Binary Output Setup button provides a setup screen to modify which output contacts will simulate the circuit breaker operation Binary Outputs Setup Bin Out S EIEIIEIEIS EE IICA Bin Out 9 10 SEILLER AEBN EEATT Cancel Enter Figure 83 Binary Output Setup Screen 6 From the above figure it can be seen that the BINARY OUTPUT Terminals 1 amp 2 have been selected to simulate the circuit breaker 52B and 52A contacts Pressing the X changes the contact to open indicated by the number 0 Pressing again changes it to be closed indicated by the number 1 During the Fault simulation Delay Time Binary Output 1 will be closed and Binary Output 2 is open Note that the opposite is true for the Brk Trip simulation Pressing Enter sets the Binary Inputs and Outputs Pressing Main Menu takes you back to the test selection screen 142 Note That the test set will wait for the relay reclosing contacts to close during the Brk Trip simulation This time will appear in the Test Screen as the Reclose Time However if th
153. ontroller to the Main Menu Start Stop This selection will apply the set quantities displayed and begin the test After Start is pressed this button will turn red and display Stop Pressing Stop at any time will stop the test and turn the outputs off 81 3 8 5 Voltage Relay Test Menu This menu permits the setting and testing of a voltage relay These tests should be conducted in accordance with the manufacturers relay specifications Voltage Test Menu Test Frequency 60 Hz File Pre set Tests Main Menu Ment Figure 59 Voltage Relay Test Menu There are several options to further define the tests to be performed Selecting one of these options will present the test setup screen for that option The bottom of the screen has common buttons File This selection will take the user to the File Manager Pre set Test Menu This selection will return the controller to the Pre set Test Menu Screen Main Menu This selection will return the controller to the Main Menu 3 8 5 1 Voltage Relay Setting Screen Voltage Relay Setting lest Frequency 60 Hz Pici up telay Tap Time Dial a 01 Reset Time E Target Tap D 5 0 2 0 Test Multiple Curve Type Op Time 6000 2400 IEEE ANSI Increment elay Seconds 0700 4 500 Figure 60 Voltage Relay Setting Screen e The Timing Settings button will change screens and will allow changes to meet the manufacturer specifications e The Targ
154. or extended test periods It is also recommended that current measurements start on the low range first and progress to the higher ranges For best results it is also recommended that the amplifier be allowed to cool down between tests Cool down time will vary depending on the ambient temperature and the test current applied Test Equipment Minimum Requirements Measurements must be made with equipment that is more accurate than the Unit Under Test UUT The instruments listed below are recommended If equivalent instruments are not available then total measured accuracies of the measuring instrument and the UTT will need to be to taken into account Digital Multimeter DCV 0 0625 Keithley 197A or equivalent Current shunt DCA 0 0625 w c f or equivalent Yokogawa ACV 0 025 ACI 0 025 WT 3000 or equivalent Phase angle meter 0 0125 North Atlantic 2000 or equivalent Counter 1 8X10 6 H P 5335A or equivalent Counter 3 PPM Fluke PM6680 or equivalent Multi calibrator 0 0125 DCA DCV Power Multimeter Megger Model PMM 1 or equivalent Notes and Precautions High voltages and high currents used in this calibration check Allow UUT and equipment a minimum of 1 2 hour warm up time for best results Allow sufficient cool down between tests on the current channels to eliminate possible accuracy drift due to heating 163 6 4 1 Checking Transducer DC IN With the MPRT on and warmed up from Main Menu press the Manu
155. ormally V1 and V2 are used to test synchronizing type relays Mag Controls the Magnitude of any installed voltage V1 V2 V3 V4 or current 11 12 13 14 generator Angle Controls the Phase Angle of any installed voltage V1 V2 V3 V4 or current 11 12 13 14 generator 132 Freq Controls the Frequency of any installed voltage V1 V2 V3 V4 or current 11 12 13 14 generator Timer Setup This selection will display the Timer Setup menu Dynamic Enabled Dynamic Disabled With the Dynamic test disabled the user may manually adjust the phase angle using the control knob to determine the closing angle The Dynamic Enabled the MPRT will automatically determine closing angle and advanced closing time for auto synchronizing relays See Pickup and Advanced Closing Time Tests for more details Start Stop This selection will apply the set quantities displayed and start the timer or not start the timer depending upon Timer Start selection Normally used with the Dynamic Enabled button When the Start button is pressed the selected voltage outputs will turn on in phase However one voltage channel will start to slip out of phase at the selected slip frequency At the advanced angle based on the slip frequency the relay will close the breaker closing contacts and start the timer When the two voltages slip back into phase the Timer will stop See Advanced Closing Time Test for more details File This se
156. orrelates to current channel 110 and Channel 3 correlates to current channel 111 and with the voltage channels converted to currents I5 correlates to current channel 112 I6 correlates to current channel 113 and I7 correlates to current channel 114 To assign channels from the Main Menu press the Ext High Current Amplifier button and the following screen should be displayed EPOCH Selection Screen ooo Figure 100 EPOCH Unit Selection Screen 5 0 Warranty Statement Megger warrants the product is free of defects in material and workmanship for a period of two 2 years from date of shipment This warranty is non transferable This warranty is limited and shall not apply to equipment that has damage or cause of defect due to accident negligence and improper operation faulty installation by the purchaser or improper service or repair by any person company or corporation not authorized by Megger Megger will at its option either repair or replace those parts and or materials it deems to be defective The warranty is in lieu of all other warranties either expressed or implied on the part of Megger and in no event shall Megger be liable for the consequential damages due to the breach thereof 156 6 0 6 1 Service Data Preventive Maintenance The unit utilizes surface mount technology SMT and other components which require little or no service except for routine cleaning etc The unit should be serviced in a clean atmosph
157. p Pressing Stop at any time will stop the test and turn the outputs off 121 3 8 9 4 Frequency Relay Timing Test Screen Frequency Timing Tes lest Frequency 60 Hz T E j g tE 3 HR al n FREQUENCY Led Duration Seconds Timer Start Frequency 96 0 Timer stop MO Latch On Open 0 0000 0 0000 0 0000 Seconds setup TZ Start File Figure 93 Frequency Relay Timing Test Setting Screen e The Target A Seal In Settings button will change screens and will allow changes to meet the manufacturer specifications e The Pickup Settings button will change screens and will allow changes to meet the manufacturer specifications The bottom of the screen has common buttons e The Start button is used to begin testing The Start button changes to become the Stop button when the test is started Pressing the STOP button will turn off all V I Generators immediately and fail the test e The File button stores the present test values e The Bat Sim ON button is used to turn the battery simulator on off When the battery simulator power is on the button will read Bat Sim OFF and vice versa e The Test Menu button returns the user to the Frequency Test Screen e The Main Menu button returns the user to the main screen menu If the Main Menu button is selected the test will be stopped and will return the generators to an inactive state 3 8 9 4 1 Dynamic Frequency Timing Test The unit performs a dynamic timing test on all under over fr
158. p Test The other is a timing test For testing the trip and reclose relays the timing test involves applying a fault current measure the trip time record the trip time simulating a circuit breaker opening and measure the time for the reclosing contacts to operate Upon initiating the 108 test the test set will apply fault current set in the setting screen and start the Trip timer running When the relay trip contacts close record the trip time T1 reset the timer wait a programmable period of time and toggle the Binary Outputs 1 A contact and 2 B contact simulating the circuit breaker opening Start the reclose timer running when the A B contacts change state Upon sensing the relay reclose contacts closing defaulted to Binary Input terminal 2 stops the timer records R1 reclose time and after a preset time delay of 0 040 seconds simulates the closing time of the breaker toggles the Output Contacts back to the original start state breaker closed and resets the timer Repeat this process depending on the No of Operations defaulted to 4 selected in the Reclose Relay Setting Screen until the relay goes to a lockout state after the A trip operation as is in this example The test set will record the trip and reclose times for each individual trip and reclose operation See next figure for example test screen Renting Tierney Pest Settings Tesi Freem GER Rate Se tna Mi As VI ELOGIO Hingoa I g 3 J 5 mp Mene 01232 011 231
159. pere the MPRT will increase the current magnitude 0 0002 amperes every 10 cycles until the relay operates For larger increments use a larger percentage Instantaneous Pulse Ramp Specifications Increment This value is used to control the how fast the MPRT will increase the current to determine the Instantaneous pickup value The value input into this field is in increase per pulse The default value for this field is 02 of pickup Example If the pickup value requires 10 amperes the MPRT will increase the current magnitude 0 002 amperes for the Pulse Time On value until the 64 Pulse Time On cyc Pulse Time Off cyc Target Seal In Ramp Specifications Increment 100msec Relay Settings The bottom of the screen has common buttons File Test Menu Main Menu relay operates For larger increments use a larger percentage This value is used to control how long the output pulse is on during an Instantaneous pickup test This value is in cycles Note Set Pulse Time On slightly greater than the operating time of the relay This value is used to control how long the output pulse is off during an Instantaneous pickup test This feature is required in order to protect the relay under test against excessive heating due to applying large currents continuously This value is in cycles Note Start with equal amounts of Pulse Time On and Off This value is used to control the how fast the MPRT will incr
160. plays the results upon test completion No data may be entered in this screen Power Pickup Test Settings Test Frequency 60 Hz Figure 71 Power Relay Pickup Test Setting Screen In the power Relay Pickup test Screen only the voltage s and current s selected in the Relay Setting Screen will be active in the test screen For example in the setting screen only 1 voltage and current were selected therefore only V1 and l1 are activated in the above figure Pressing the Start button will start the test The test voltage specified in the setting screen will be applied and the appropriate test current will be applied at the appropriate test angle The current will automatically ramp up until the relay operates or in case of a solid state relay the LED lights up indicating pickup The pickup Watts will be displayed in the Watts box The formula used to calculate Watts is also displayed The bottom of the screen has common buttons File This selection will take the user to the File Manager Batt Sim Off Batt Sim On This selection will turn the Battery Simulator On and Off Test Menu This selection will return the controller to the Test Menu Screen Main Menu This selection will return the controller to the Main Menu Start Stop This selection will apply the set quantities displayed and begin the test After Start is pressed this button will turn red and display Stop Pressing Stop at any time will stop the test and turn the out
161. puts off 100 A timer setup link is available on this screen Also the Timer Setup configuration is displayed for convenience The status of the relay contact will be displayed on the screen real time along with the value of the test quantities After the test is completed the current amplitude will be read out from the screen or stored in the memory 3 8 7 3 Power Relay Target Seal In Test and Results This screen displays the results upon test completion No data may be entered in this screen NOTES TO OPERATOR Block the Tnp Contacts closed Depress the Start key to energize the relay Start File Test Main Menu Menu Figure 72 Power Relay Target and Seal in Test The Timing and Pickup test screens may be entered to change test settings The bottom of the screen has common buttons File This selection will take the user to the File Manager Batt Sim Off Batt Sim On This selection will turn the Battery Simulator On and Off Test Menu This selection will return the controller to the Test Menu Screen Main Menu This selection will return the controller to the Main Menu Start Stop This selection will apply the set quantities displayed and begin the test After Start is pressed this button will turn red and display Stop Pressing Stop at any time will stop the test and turn the outputs off 101 3 8 7 4 Power Relay Timing Test Results This screen displays the results upon test completion No data may b
162. puts on and check for proper output If output does not change peer through the air intake slots on the top to observe the VI Gen LED s Each module has some LED s that stay on continuously and some that blink If there are no blinking LED s on one or more modules then the 160 module is not communicating with the operating system Replace the VI Gen Module 6 3 1 4 Binary Inputs and Battery Simulator If all the items external of the Timer assembly are in proper order then the problem exists within the Binary Input assembly itself Some basic troubleshooting can pinpoint problems to the approximate cause Basic troubleshooting is as follows 1 Timer does not stop Jumper the appropriate Binary Input terminals manually If LED above the selected input lights check Timer Setup screen to verify that the selected binary input is properly setup as a Timer Stop post Check Timer Stop settings as N O Normally Open and Latch On If LED does not light up the TCM backplane will need to be repaired or replaced Counting errors AC applied or removed Start Stop signals can create what appears to be poor repeatability an inaccuracy or a malfunction in the Timer The lower the voltage level the more serious the error will be What appears to be an error however is actually a variation in the point on the sine wave at which the voltage is great enough to cause the gate circuit to operate If the circuit used for the timing test
163. quired turn OFF the EROCH 20 II test unit 2 0 SETUP 2 1 System Unpack the unit and check for evidence of any shipping damage If there is any visual damage notify the freight carrier to make a damage claim and notify Megger of the damage CAUTION Potentially lethal voltages may be present on the output terminals It is highly recommended the operator read the user manual thoroughly and have an understanding of the test set operation prior to turning power on 1 Plug the Touch View Interface into the front of the unit The TVI will be active once the power is turned ON A personal computer PC will take control of the unit if it is connected The unit power must be OFF before the PC is connected to the unit 20 2 Before connecting power to the unit make sure the POWER ON OFF Switch is in the OFF position 0 Plug the unit line cord into a power source and turn the POWER ON OFF Switch to ON I 2 2 Touch View Interface Operation The TVI is the manual control and user interface for the unit All manual entries will be made through the TVI unless the unit is connected to a personal computer During the power up sequence the test system automatically does self test to insure everything is operating properly Once the system has completed its self checks the Introduction screen will appear MPRT PROTECTIVE RELAY TESTING www megger com Figure 6 Introduction Screen Pressing the Main Menu button will produce the follo
164. r second then press the appropriate touch Delta 1 window and set the frequency to 0 10 Hz Sec using the numeric keypad 7 If using Hz Sec set the Delta 2 rate of change Ramp Rate 2 similarly to the Delta 1 8 Press the Start button window The voltage output frequency will begin to delta or step down after the Prefault Duration time expires When the relay trip signal is sensed the output will de initiate and the TIMER will stop indicating the trip time 131 3 8 10 3 Manual Auto Synchronizing Test Screen Manual Auto Synchronizing Test Settings lest Frequency 60 Hr Angle Freg 00000 DU UU Advanced Close Time 00000 Seconds Closing Angle i setup TI Dynamic Fi Disabled R gt e EE Start File Ges Manual Test Main E GE Figure 97 Manual Synchronizing Test Screen Description The Manual Auto Synchronizing Test screen is designed to permit manual output control of the MPRT and provide testing of synchronizing and auto synchronizing relays This control screen allows the user to apply any value of magnitude phase angle or frequency to a synchronizing relay and time the response Operation This screen can apply set values to visually watch the response of the relay or the unit can apply set values and start the timer and await a response time from a synchronizing relay Controls V1 V4 4 11 14 Permits control of any installed voltage V1 V2 V3 V4 or current 11 12 13 14 generator N
165. r to be tested Limited to 36 characters Manufacture Input the name of the transducer manufacturer Limited to 36 characters Model Enter transducer model number Limited to 36 charcaters Serial Number Enter the serial number of the transducer Limited to 36 digits 3 8 10 4 3 System Default Settings Some of the system default settings come from the System Defaults Screen which can be accessed from the Main Menu Frequency The frequency will automatically default to the system frequency default set in the System Default Screen If the device is to be tested at another frequency the operator enters the desired frquency by touching the window A numeric keypad will appear for the user to enter the desired frequency If the transducer is a DC transducer the operator will enter a value of 0 0 Upon pressing enter the frequency window will change to read DC Voltage The voltage value will automatically default to the Voltage Output default value set in the System Default Screen If the device to be tested does not require an AC or DC voltage the operator may leave it as is or change it to 0 0 To change the value press the display window and a numeric keypad will appear Depending on the transducer selected in the Select Transducer Type window the output may or maynot be automatically selected in the Transducer Test Screen Current The current value will automatically default to the value set in the System Default Screen However
166. ration Menu press the Convertible V I Control button Set all available convertible channels from Voltage to Current and press the OK button From Main Menu press the Manual Tests display button Press the Voltage Current button You should note that all the Voltage Channels have been converted to currents 15 16 17 and 18 Using TVI select a current output channel by pressing either 15 l6 17 or 18 To set an output value press the Magnitude window and enter the desired value Set the output to the desired current as listed in the following Table and initiate the output by pressing the Start button The selected output indicator will change from Green to Red UUT output will be displayed on To reduce possible thermal drift allow 5 minutes cool down after each measurement of 15 Amperes or higher 166 Touch View Interface TVI Note To adjust current touch the Magnitude window and it should change color to Red Using the Control Knob adjust the output current One click on the Control Knob is approximately 0 001 Amperes Table 8 Convertible Channel AC Current Test Values Output Output Current Output Tolerance UUT ww MAX 500A 05 i25ma 0 4875 05125 o ma EE 25125 po ma 4 9875 5 0125 6 4 6 Checking Phase Angle Phase Angle is tested at either an output frequency of 50 or 60 Hz Two sets of phase angles are tested using one common reference for all tests Voltage Channel 1 Angles will be checked betwee
167. re are a variety of reclosing relays Some have a simple reclose feature Reclose Only that does a simple definite timing function by closing a set of contacts to close a breaker Other relays include trip and reclose functions trip reclose The MPRT can test both types The electromechanical relay operates from either an AC or DC voltage to drive a motor and cam shaft This means that the user needs to be able to switch on either an AC single phase or a single dc voltage source The solid state trip and reclose relays usually require three phase voltage be applied during the tests Therefore the user will need to be able to select single phase or three phase voltages AC or DC in the relay setting screen The user will also need to be able to select single phase or three phase test currents for the trip amp reclose relays In some cases the user may need single phase current and three phase voltage In the case for the trip 4 reclose relays the user will be provided a Test Current window to set the test value The same test current will be applied for each trip test either single phase or three phase The Test Voltage will need to be set similar to the Test Current and be applied during the entire test The relay does require external stimulus from circuit breaker simulation using the A normally closed B normally open contacts This will be simulated using the Binary Output contacts 1 2 Therefore the user will need access
168. rection of the ramp If the fault value is less than pre fault value then the ramp is decreasing If the fault value is greater than the pre fault value then the ramp is incremented up from the pre fault value There isn t any change to the generator outputs during pre fault Hz Prefault l Post Fault 60 00 l Delta 2 Set point Fault Freq EEVEE a SA AETA E S ER EE Prefault Time gt Time Duration Dynamic Frequency Duration is the time at the fault frequency The dynamic fault requires the V I Generators to ramp to the actual fault value Delta 1 is the fault ramp and the change in frequency divided by time Hz S The set point indicates the frequency when the relay first detects the fault Once the set point is reached the relay starts its timer If the fault is not cleared within the timeout the relay will trip The fault frequency is below the set point to ensure the relay trips for a decreasing ramp The fault value is greater than the set point for the increasing ramp Once the ramp has reached the set point the timer is enabled The fault condition is maintained for the time indicated in the duration The post fault requires the V I Generators to ramp with the generators in the fault condition This post fault ramp will ramp back to the pre fault condition The relay is also in a fault condition and could trip The post fault will be able to detect the relay trip and record the trip time The post
169. reen When the user presses the Timer Setup button anywhere in the TVI the user will be first presented with the basic timer setup screen This screen will provide the user with the capability to setup the timer for nearly all relay testing requirements If the basic timer setup screen does not provide all the capability required the user can press the Complex Timer Setup button This screen will provide the user the capability of adjusting all the timer input and output setting parameters Basic Timer Setup Menu Timer Setup Contact Action Condition Latch Mode p Start Latch On Latch On TE Max Operate Time seconds Debounce Time ms 0 1 Turn Voltages Off B Stop Contact Only Stop Contact Only Turn Currents Off A D Horn Off Seconds Complex Timer Timer Reset Cancel Enter Figure 26 Basic Timer Setup Menu Description Controls Contact The Contact label identifies which input terminal the associated controls are referring to Action The Action control determines the action of the timer The selections are as follows Mon C Monitor Contact will light the front panel indicator conditions become true Mon V Monitor Voltage will light the front panel indicator when the conditions become true Start Starts the timer and lights the front panel indicator when the conditions become true Stop Stops the timer and lights the front panel indicator when the conditions become true CA Starts the timer when curr
170. rent will be considered lagging current lags voltage In this situation the typical test angles may vary between 0 to 90 degrees lag and 359 9 to 270 degrees lag 90 degrees leading This could cause some confusion to the user By forcing the display to 180 simplifies the testing considerably The test will start at unity power factor or 0 Since the default angle will be 0 zero degrees the calculation is simple The formula required to calculate Power Factor is COS 0 1 000 Power Factor V1 Z0 1120 Example The default voltage is 120 00 Volts and current is 5 Amperes AC and the user inputs a Power Factor of 0 3 as LEAD and LAG Values The angles required for full scale output from the transducer is 0 3 Power Factor COS 72 5 or 72 5 LEAD and 72 5 LAG When the test is Started the measured voltage and current outputs are displayed and the calculated Power Factor is based on the measured phase angle bewteen the voltage and current outputs This is the value that gets displayed in the Transducer Test Screen under the MPRT Output next to the Label of Power Factor 3 Element Another value of Power Factor gets calculated using the measured dc Volts or dc milliampere output as displayed in the Transducer Output section Let us assume that in our next example transducer the output is in dc milliamperes For this example let us say that 1 milliampere of dc current is equal to the full scale Power Factor of
171. reported when out of range values are entered The error screen will display the range for that value to ensure a value is entered that resides within the tolerance of the range 2 5 Advanced Visual Test Software AVTS AVTS is external software specifically constructed to work with Megger relay test equipment MPRT and Pulsar The software contains the necessary steps to perform specific relay tests It is designed to perform manual or automated relay testing for distance impedance over current differential frequency voltage synchronous power and reclose relays Also AVTS is specifically designed to perform DFR testing and playback including GPS synchronized end to end tests The MPRT comes with a Basic version of AVTS while the Advanced and Professional versions are optional 3 0 OPERATING PROCEDURES This section describes basic operating procedures for using the multiple output modules of the unit for such applications as paralleling current outputs conducting harmonic restraint tests series of potential sources to provide higher than rated potential testing over under voltage relays and forming three phase voltage outputs 3 1 Touch View Interface The Touch View Interface TVI is used to operate the MPRT manually It is controlled via a touch screen and a control knob The touch screen allows the operator to change a parameter by simply touching the location for the value Then a keypad can be used to change the value or th
172. right equates to Phase C and left most slot may be used to provide a fourth phase polarizing voltage and or current residual voltage and or current or other required sources 13 Amplifier EXT Inputs There can be up to four sets of BNC connectors labeled V1 I5 11 V2 16 I2 V3 17 13 and V4 18 14 on the back panel depending on the number of amplifier modules installed These connectors are used to amplify an external analog signal using the MPRT amplifiers Application of 10 Volts Peak will provide Full Scale output from the selected output Ln En Eh E Figure 3 MPRT Rear Panel Analog Input Terminals A CAUTION DO NOT APPLY MORE THAN 10 VOLTS PEAK TO THE EXT INPUT TERMINALS APPLICATION OF MORE THAN 10 VOLTS PEAK MAY DAMAGE THE AMPLIFIER 1 13 Touch View Interface The Touch View Interface is used in manual operation of the unit The color LCD touch panel display and control knob are the operator interface for the unit Figure 4 Touch View Interface 1 LCD Color Display this is an 8 5 inch touch panel display 2 Control Knob this knob will adjust values once the cursor is in the box location of the value to be changed 14 1 2 Terminology The acronyms terms and definitions used throughout this manual are described below 1 21 Acronyms AC Alternating Current AVTS Advanced Visual Test Software CW Clockwise rotation CCW Counter Clockwise rotation DC Direct Current GPIB General Purpose I
173. rounded up to 7 in the last digit displayed When the test is Started the measured voltage and current outputs are displayed and the calculated Watts is based on the measured voltage and current outputs This is the value that gets displayed in the Transducer Test Screen under the MPRT Output next to the 147 Label of Watt 2 1 2 Element Another value of Watts gets calculated using the measured dc Volts or dc milliampere output as displayed in the Transducer Output section Let us assume that in our example transducer the output is in dc milliamperes In this example let 20 milliamps of dc current be equal to the full scale output of 1500 Watts For this example let s say that the measured output voltages are 120 02 Volts V1 and V3 and the measured output currents are 4 166 Amperes The measured output Watts would be 120 02 4 166 0 120 02 4 166 COS 0 120 02 4 166 COS 60 0 120 02 4 166 COS 60 0 or 500 0332 500 0332 250 0166 250 0166 1500 10 Watts For this example let s assume the measured output current from the transducer is 20 1 mA dc Based on a Max value of 20 mA equals 1500 Watts the displayed Watts in the Transducer Output section of the Transducer Test Screen should read 1507 5 Watts The Accuracy displayed in the Transducer Output section would be equal to the following 1507 5 1500 10 1500 10 100 accuracy or 0 493 If this were a 0 5 transducer then the
174. s relay specifications Reclose Test Menu Test Frequency 60 Hz Timing File Pre sel Tests Main Menu Menu Figure 74 Reclosing Relay Test Menu Screen There are several options to further define the tests to be performed Selecting one of these options will present the test setup screen for that option For electronic relays apply a current get a relay trip and record the trip time remove the current toggle the 52a amp 52b contacts Binary Outputs 1 amp 2 monitor the reclose contact toggle the 52a amp 52b contacts again apply current again and look for lockout This will be repeated for the total number of operations selected in the setup screen For electro mechanical relays set the current to zero trip curve will be ignored set the number of operations and reclose time set a current measure the trip and reclose time and simulate the 52a amp 52b contacts This will be repeated for the total number of operations selected in the setup screen The bottom of the screen has common buttons File This selection will take the user to the File Manager Pre set Test Menu This selection will return the controller to the Pre set Test Menu Screen Main Menu This selection will return the controller to the Main Menu 103 3 8 8 1 Reclose Relay Setting Screen Reclose Relay Settings Test Frequency 60 Hz Relay Tap Test Multiple Faulted Phase Delay Time Em vo No of Ops Voltage oo Rec
175. s set to 360 Lag on V2 reference following figure Balanced 30 3 Wire Fault Open Delta Connection If V equals the desired test potential then Set V V 20 Set V2 V Z 300 3 4 3 1 1 Voltage Output Connections When setting up an unbalanced Open Delta configuration the desired phase to phase fault voltage Vi is set using voltage channel 1 with its phase angle set to 0 Phase to phase voltage Vx and its phase angle relationship for voltage channel 2 must be calculated using the Law of Cosines where For any triangle the following formula applies A C B AB AC BC 2 x AB x BC x cos B The next figure shows the phase relationships between voltages and an example of the necessary calculation For convenience the amplitude and the phase angle settings for the typical V fault magnitudes are tabulated 36 From the Law of Cosines O arccos Vr Ma Eg V2 Y y fe ES 120 f NORMAL BALANCED CONDITION 23 2 2 12 31 23 Figure 24 Open Delta Unbalanced phase to phase Fault Voltages Settings For Typical Phase to Phase Fault Voltages Vio Vs z pap apa 3 4 3 2 T Connection The second method of obtaining a three phase three wire voltage source is the so called T Connection The method shown in the following figure is easier to use when obtaining an unbalanced phase to phase fault simulation since it eliminates calculations To reduce confusion when using the T Connection
176. s value entered by the user The value input into this field is in increase per 10 cycles The default value for this field is 0 02 of pickup Example 98 Increment Pulse Time On cyc Pulsar Time Off cyc Target Seal In Ramp Specifications Increment 10 cycles Relay Settings If the pickup Watts value requires 1 0 ampere the MPRT will increase the current magnitude 0 02 amperes every 10 cycles until the relay contacts close This value is used to control the how fast the MPRT will increase the current to determine the Instantaneous pickup value This feature is not used for Power Relays This value is used to control how long the output pulse is on during an Instantaneous pickup test This value is not used on Power Relays This value is used to control how long the output pulse is off during an Instantaneous pickup test This value is not used on Power Relays This value is used to control the how fast the MPRT will increase the current to determine the pickup value for the target and seal in The value input into this field is in increase per 10 cycles The default value for this field is 0 02 of pickup Example If the pickup is set for 2 0 amperes the MPRT will increase the current magnitude 0 04 amperes every 10 cycles until the relay seal in contacts close The Relay Settings button will return the user to the Relay Settings Menu 3 8 7 2 Power Relay Pickup Test Results This screen dis
177. se the trip contacts Some relays require the user to block the trip contacts closed to perform this test The test ramps the DC output at a pre selected rate see Test Configuration The Seal In test requires the user to press the Stop button when the Seal In contact is closed since these contacts cannot be monitored by the unit 3 5 9 Timing The Timing test is similar to the pulse ramp except is uses a single step The test steps from a normal operating condition into the fault condition and waits for the relay to respond The test may energize the relay with the normal operating values then sets the output of the generators to the fault values and starts the timer The timer input monitors the relay constants The fault value is a multiple of relay tap settings This value could be 70 80 90 200 300 or 400 depending on the type of relay being tested voltage or current The test has three multiple values and uses each of them until a trip occurs or the last value is used In some tests the user may select IEEE IEC time curves Trip times are calculated using preprogrammed timing formulas per IEEE or IEC standards However if IEEE IEC times curve are not used or specific value trip time tests are to be preformed the user may manually enter a value s and associated trip time s in the appropriate value windows 3 5 10 Harmonic Restraint This test uses two current generators The generators are in phase while the current is being
178. set slightly longer than the operating time of the relay Set the AF rate of change Ramp Rate 1 For example if you wish to ramp the output frequency at 1 hertz per second then press the appropriate touch screen window and increase the frequency until 00 10 Hz Sec is displayed However if you desire to step the frequency press the touch screen window twice The word STEP should be displayed Set the AF rate of change Ramp Rate 2 similarly to the AF A different rate may be selected from that of A F A step function may also be selected Press the START button window The voltage output frequency will begin to delta or step down When the relay trip signal is sensed the output will de initiate and the TIMER will stop indicating the trip time 123 3 8 10 Manual Test Menu Screen This menu permits the setting and testing of relays in a manual mode These tests should be conducted in accordance with the manufacturers relay specifications Manual Test Menu Test Frequency 60 Hz Vollage Current Auto Synchronizing Transducer Frequency Fila Pre sel Tests Main Menu Menu Figure 94 Manual Test Menu Screen There are several options to further define the tests to be performed Selecting one of these options will present the test setup screen for that option The bottom of the screen has common buttons e The File button stores the present test values or reloads the previous set of values e The Main Menu butt
179. sses are input in this screen prior to attempting an update of the MPRT software firmware To get access to this screen from the Main Menu press the System Config button Then press the IP Address button it will already have a defaulted IP address preset and enter the appropriate IP address for your network Press the Default Gateway button to enter the Gateway Address After entering the Default Gateway and IP addresses the unit will calculate the Network Mask After entering the addresses press the OK button Then Save the new settings values as defaults by going to the File Manager screen press File press Save User Sys Def press Execute and OK Your new network settings have been saved to internal memory Local IP Address Odo Network Mast Default Gateway Figure 101 MPRT Network IP Address Dialog Box 6 2 2 Updating MPRT Software Firmware Before attempting to execute an update check to make sure that the proper Gateway and IP addresses have been set in the System Configuration Screen see 6 2 1 above To perform an upgrade from the Main Menu press the Soft Firm Update button Press the Update Check button The MPRT will then look for the FTP server Upon finding the server the MPRT will present the user a Upgrade Monitor Screen which will indicate the status of the upgrade The MPRT will automatically look to see if there is a newer version of Software Firmware available and if there is it will automatically downlo
180. st Screen should read 1000 0 998 998 00 Watts The Accuracy displayed in the Transducer Output section would be equal to the following 998 0 999 98 999 98 100 accuracy or 0 198 If this were a 0 2 transducer then the firmware would compare the accuracy values between the Setting Screen and the Test Screen and would display PASS in the Transducer Output section of the test screen Note All of the calculations are very similar when testing VAR 1 1 2 Element transducers The primary difference is replacing the COS function with the SIN function For example let us assume that the test angle for the VAR transducer is 30 degrees This is an important point since if they were in phase the SIN of 0 is O thus the Var contribution is O at the in phase condition Only rotating the phase angle 30 degrees do we create the measured output VAR s would be 120 00 4 166 SIN 30 120 00 4 166 SIN 30 499 92 VARs 3 8 10 7 4 Watt VAR 2 Element This transducer is normally used in three phase three wire delta application which requires 2 voltages and 2 currents to test Normally the PT s and CT s are connected to A and C phases The MPRT will automatically select two voltage and current channels V1 V3 11 and 13 in the event that there is no V3 13 channel then V2 and 12 will be used The test will initially start at the default voltage value that is set in the Default Setting Screen for each Voltage output Thus for
181. st voltage value of 150 Volts at an 132 angle of 0 Note the DC voltage transducer is identical except instead of 50 or 60 Hz as the default output frequency the display changes to read DC When the test is Started the measured voltage output is displayed This is the value that gets displayed in the Transducer Test Screen under the MPRT Output next to the Label of AC Voltage or DC Voltage Another value of Volts gets calculated using the measured dc Volts or dc milliampere output as displayed in the Transducer Output section Let us assume that in our example transducer the output is in dc milliamperes For this example let us say that 1 miiliampere of dc current is equal to the full scale output of 150 Volts Therefore the theoretical output Volts from the transducer would be 150 Volts if the output current is 1 milliampere For this example let s say that the measured output voltage of MPRT is 150 01 Volts For this example let s assume the measured output current from the transducer is 0 999 mAmperes Based on a Max value of 1 mA equals 150 Watts the displayed AC Volts in the Transducer Output section of the Transducer Test Screen should read 150 0 999 149 85 Volts The Accuracy displayed in the Transducer Output section would be equal to the following 149 85 150 01 150 01 100 accuracy or 0 106 If this were a 0 2 transducer then the firmware would compare the accuracy values between the Setting Scree
182. t Terminal 1 first pair of Binary Input terminals so that when the relay contacts close at the advance angle it will start the timer and capture the closing angle at the same time Set V1 to the Normal voltage output Set V2 to the Normal output voltage output and slip frequency For example VOLTAGE 2 AC 120 FREQ 60 100 V2 ANGLE display should start at 0 we want V1 and V2 to turn on at 0 together V2 will turn on in phase with V1 but will slip out of phase at the selected slip frequency Since the phase angle is measured the angle should start to change for V2 reading a number until the angle of 180 is reached then change to The number should fall from 179 towards the closing angle At the advance angle the relay contacts will close thus starting the timer Since the phase angle was changing with the slip we could capture the closing angle when we start the timer When the two voltages slip into phase the Timer will stop The time indicated will be the advance time setting of the relay See the following figure for a graphic representation 5 SLIP FREQUENCY F FIXED FREQUENCY STNCHROSCOPE As S approaches F at some point the advance angle the relay will send a close signal which will start the Timer When S and F are in synchronous the Timer will stop The time indicated on the timer display is the advance time of the relay based on the preset slip frequency 3 8 6 3 Synchronous Relay Timing Test Resu
183. t head screws the other four screws located across the top are Phillip head screws C Remove the two retaining screws located on the back of the VI Gen D Grasp the back the Module with one hand and gently yet firmly pull the module from the unit 162 a Contact the factory for a Repair Authorization Number and return instructions if service is required A Repair Authorization RA number will be assigned for proper handling of the unit when it arrives at the factory Any non warranty repair cost incurred for the repair or replacement of parts and or materials shall be the responsibility of the purchaser Provide the factory with model number Unit serial number serial number of VI Gen if appropriate nature of the problem or service return address your name and how to contact you should the factory need to discuss the service request You may need to provide a purchase order number cost limit billing and return shipping instructions If an estimate is requested provide the name and contact information 6 4 Calibration Check Prerequisites For best accuracy it is recommended that tests be conducted at a normal ambient operating temperature of 25 C 5 C When testing AC and DC current outputs it is best to limit the test time to a minimum to make an accurate measurement This will limit the accuracy drift due to the heating effect of the output current normally only applicable to test currents of 15 Amperes or above f
184. t to lockout then set the number of operations to 4 Set Reclose Ops Shot Count to the desired value the number of reclose operations that the relay is set for A maximum of 9 reclose operations shots may be recorded 140 Reclose Relay Settings Test Frequency 60 Hz Relay Tap est Multiple aulted Phase Delay Time Py f f No of C Vollage Phase Type a ES S ii Reclose Ops Brk Time 40 00 Figure 81 Reclose Relay Setting Screen a Press the Delay Time window and enter the desired delay between operations in seconds Note this will be the Fault simulation time normally the time an overcurrent relay may operate Do not set the delay time too long or the reclosing relay may reset between operations 3 Press the Lockout Time window and set the desired total time to lockout Note this is the total time to lockout which includes the relay reclose time delays and the Delay Time that you just entered in the step above Therefore allow this time plus an additional second or two for the relay to totally lockout At the end of the Lockout Time any voltage output set in the setting screen will be removed from the relay and the test is completed 4 Press the Timer Setup button The Timer Setup Screen should appear 5 In the following figure the Timer Setup Screen has already been modified for testing a reclosing relay The BINARY INPUT Terminal T2 was selected and set to STOP the Timer upon N O Normally Open c
185. t without re applying the pre fault conditions Pulse Ramp uses all screen values e The Pulse Time is the length of time the fault value will be applied The range is from ito 9999 cycles e The Delay Time is the cumulative of fault and fault recovery times with a range of 1 to 9999 t cycles Note The Pulse Time must be less than Delay Time e The channel selection default condition enables all Voltage and Current Generators This is indicated by a check mark in each of the generators selection area e The voltage or current may be held If Voltage is held the Start Stop and Increment values will need to be expressed in Amps If Current is held the Start Stop and Increment values will need to be expressed in Volts The Increment value is used to increase the fault values from the start to stop The Start value is the beginning value for the output ramp The limit for the MPRT 8415 unit is 15 amps RMS The limit for the MPRT 8430 unit is 30 amps RMS The Stop value is the upper limit of the ramp The two values should be checked to ensure the Stop value is greater than the Start value if ramping current up 52 The bottom of the screen has common buttons File Batt Sim Off Batt Sim On Test Menu Main Menu Start Stop This selection will take the user to the File Manager This selection will turn the Battery Simulator On and Off This selection will return the controller to the Test Menu Screen This selection w
186. the Test Menu Screen Main Menu This selection will return the controller to the Main Menu Start Stop This selection will apply the set quantities displayed and begin the test After Start is pressed this button will turn red and display Stop Pressing Stop at any time will stop the test and turn the outputs off When running this test a current l 2xTap will be applied first to the relay in order to close the main contact Once the contact closes the path for the DC target and Seal in closes also Current ls is used to ramp a DC current up until the target drops The user must press the Stop button and record the results 6 3 8 3 5 Overcurrent Relay Instantaneous Test Results This screen displays the results upon test completion No data may be entered in this screen Figure 46 Overcurrent Relay Instantaneous Test Screen The Timing Target A Seal In and Pickup test screens may be entered to change test settings Each current channel must be selected by touching I1 12 and 13 However there must be a corresponding V I Generator The bottom of the screen has common buttons File This selection will take the user to the File Manager Batt Sim Off Batt Sim On This selection will turn the Battery Simulator On and Off Test Menu This selection will return the controller to the Test Menu Screen Main Menu This selection will return the controller to the Main Menu Start Stop This selection will appl
187. the Delay Time window and enter 0 zero When set to zero the logic in the test set should be to look at BINARY INPUT 1 and wait for the trip contacts to close When the relay trip contacts close the trip time is recorded the output current is turned off and the BINARY OUTPUT contacts will be toggled Press the Lockout Time window and set the desired total time to lockout Note this is the total time to lockout which includes the relay reclose time delays and the expected total operating trip time of the relay s individual tripping operations Therefore allow this time plus an additional second or two for the relay to totally lockout At the end of the Lockout Time any voltage output set in the setting screen will be removed from the relay and the test is completed Press the Timer Setup button The Timer Setup Screen should appear The Timer Setup Screen has already been modified for testing a reclosing relay The BINARY INPUT Terminals T1and T2 were selected and set to STOP the Timer upon N O Normally Open contacts closing T1 is associated with the relay trip contacts and T2 is associated with the relay reclosing contacts The Latch was set On so that the timer would stop on first contact closure thus ignoring any contact bounce The Timer was defaulted to measure time in Seconds 145 Binary Outputs Setup Bin Out SICH et tL E RE Bin Out 10 ASO OOO Figure 87 Binary Outputs Setting Screen 14
188. the other current channel provides the fundamental current There are two methods available to do harmonic restraint tests the first method uses a pure harmonic 2nd 3rd 5th etc of the fundamental from one current channel summed with the fundamental current from a second current channel at the relay The second method uses the unit HWAVE feature The HWAVE simulates the diode method recommended in some relay manufacturers instruction literature When the HWAVE is selected the output module provides a half wave sinewave similar to what you would see if using a diode in series with a current source H NOTE Some recommended test procedures prefer using 4 DC amperes of half wave Since the unit displays the full RMS sine wave quantity it will be necessary to set 8 89 amperes RMS on the selected HWAVE current channel to achieve the desired equivalent of 4 DC amperes half wave Use the following formulas to calculate other values of DC half wave Ipeak IDC halfwave LL and Ipeak Irms 1 414 Therefore E Idc halfwave US PLANA Or me Idc halfwave 0 45 Solving where Idc 4 Irms or Irms 8 89 33 3 3 3 1 Basic Harmonic Restraint Test Procedure To set up the unit for harmonic restraint testing use the following procedure 1 Select a current module to provide the desired harmonic Set the current channel to the desired harmonic Use either second third or fifth harmonic in conjunction with the selected frequenc
189. the user can set the display for clockwise and counterclockwise rotations The factory default is 0 360 lagging Press the Phase Angle select button and the following screen will appear Phase Angle Defaull Phase Selection Figure 15 Phase Angle Display Selection Screen Select either Leading or Lagging and the phase indicators 0 deg or 0 240 120 deg or 0 120 240 deg or 0 120 120 deg Selecting 0 360 Lead and 0 240 120 deg will result with V1 referenced at 0 V2 at 240 Leading V1 and V3 at 120 Leading V1 Counterclockwise rotation Currents when entered will Lead their respective voltages by the angle entered Selecting 0 360 Lag and 0 120 240 will result with the voltage V2 and V3 lagging V1 by 120 and 240 degrees respectively Any current values entered will lag their respective voltages by the angle indicated See section 3 2 for more details on setting phase angle relationships 25 2 2 3 12 System Frequency The system frequency will be set to the typical value of the country either 50 or 60 hertz Other fixed frequencies are available The unit can provide a fixed output frequency of O DC 25 50 60 100 hertz or Line Sync 50 60 Hz To change the default frequency press the System Frequency button and the following selection screen will appear Select one of 0 Hz 100 Hz Line Sync Figure 16 System Default Frequency Select 2 2 3 13 Default Current Output The Default Current provides
190. the voltage output 1 is designated V and its phase angle set at 0 voltage output 2 is designated V and its phase angle set for 180 and voltage output 3 is designated V and its phase angle is set for 270 Any combination of balanced three phase faults or unbalanced phase to phase fault conditions can be easily simulated The following figure indicates these phase relationships NOTE This method should not be used for very low fault voltages i e 5 volts or less or for testing ABB or Westinghouse type SKD relays 37 Balanced or Unbalanced Fault T Connection Vy Va Vp Ve Desired Fault Voltage I Mr 20 EI y 41809 S20 or Ve 104V 2270 38 3 4 4 30 4 Wire Y Connection A three phase four wire potential system can be provided using three output modules The vector relationships are referenced below This Y Connection has the advantage of being able to supply a higher line to line voltage 1 73 x phase to neutral voltage It is ideally suited for simulating phase to ground faults Voltage channel 1 is designated as V with its phase relationship set for 0 Voltage channel 2 is then designated as V and phase angle set for 120 Finally voltage channel 3 is designated V and phase angle set for 240 for a 1 2 3 counter clockwise rotation Va Vp and V are connected to the voltage potential binding posts on the respective test sets If a neutral is required it is connected to a ground
191. tial Relay Polarizing Test Results oocooonncnccconcnncconcnnconannnnononennonanononnanenonnnnoos 81 30 0 Voltage Relay Test MON EE 82 3 8 5 1 Voltage Relay Setting Screen N eguan i ana e aa eaa iian Ti nni ea 83 3 8 5 2 Voltage Relay Pickup Test Results AA 84 3 8 5 3 Voltage Relay Target Seal In Test Hesulte 86 3 8 5 3 Voltage Relay Timing Test Results AE 87 3 8 6 Synchronous Relay Test Menu 89 3 8 6 1 Synchronous Relay Setting Gcreen nna a 90 3 8 6 2 Synchronous Relay Pickup Test Results ccccccconcccnccccnonconcccnnancnnnnononconononanrcnnnnnnnns 91 3 8 6 2 Testing Sync Check Synchronizing and Auto Synchronizing Relays 92 3 8 6 3 Synchronous Relay TIMO BE 93 3 8 7 Power Relay Test Menu 94 3 8 7 1 Power Relay Setting SCreen ooooonccnnnccccccooonncnnnncnnonononcnnnnnonnnnnnnnnnnnnnnonnnannnnnnnnnnnnnnans 95 3 8 7 1 Test Configuration Sree M meine e a ei NEE 98 3 8 7 2 Power Relay Pickup Test Results AA 100 3 8 7 3 Power Relay Target amp Seal In Test and Hesulte 101 3 8 7 4 Power Relay Timing Test Results oonncccoonncnccconcnnconanoncnnnncnnononnnconanonconancnnnnnnnanonnas 102 3 8 8 Reclose Relay Test Menu 103 3 8 8 1 Reclose Relay Setting Gcreen 104 3 8 8 2 Reclose Relay Pickup Test Setting Gcreen 105 3 8 8 3 Reclose Relay Timing Test Results ccccooccnccconcnnccconnncnconcnnononnnnonanoncnnanennnnonennnonas 106 3 8 8 3 1 Testing Reclosing Relays Theory of Operation
192. ton will turn red and display Stop Pressing Stop at any time will stop the test and turn the outputs off A timer setup link is available on this screen Also the Timer Setup configuration is displayed for convenience The status of the relay contact will be displayed on the screen real time along with the value of the current The Stop current is the maximum current provided by the test set before 66 test is stopped This instance is applicable if the relay does not operate when ramping the current up between the Start and Stop values After the test is completed the current amplitude will be read out from the screen or stored in the memory 3 8 3 4 Overcurrent Relay Target 4 Seal In Test Results This screen displays the results upon test completion No data may be entered in this screen Overcurrent Target Seal In Test lest Frequency 60 Hz II Relay Setting Angle Freg AE E Hi Observe when contacts are closed and press Start NOEs TO OPERATOR Depress the Start key lo energize the relay Stari File Test Main Menu Menu Figure 45 Overcurrent Relay Seal in Test Screen The Timing Instantaneous and Pickup test screens may be entered to change test settings The bottom of the screen has common buttons File This selection will take the user to the File Manager Batt Sim Off Batt Sim On This selection will turn the Battery Simulator On and Off Test Menu This selection will return the controller to
193. ts 2 3 Communication Ports There are several different communication ports These ports are Serial USB GPIB Parallel and Ethernet The function of these ports are similar but are differentiated by their respective speed at performing a set of operations 217 2 3 1 RS 232C Serial Port The Serial port will operate at various baud rates The connection to it is limited by this speed Check baud rate using the System Configuration screen 2 3 2 IEEE 488 GPIB The IEEE 488 GPIB port will allow a faster baud rate and connectivity to the Unit This port is recommended for connection to the unit except when DFR streaming or EMTP files need to be controlled in real time 2 3 3 Ethernet 10 BaseT The Ethernet port will allow the fastest method for DFR playback streaming in real time Firmware updates use this port for downloading purposes since it is the most effective and efficient communication Simply connect the port to the networked PC and download accordingly 2 3 4 USB Port The USB ports are used for communication to external devices such as an optional I O interface box 2 3 5 Printer Port The Printer port is for future use and is not available at this time 2 4 Error Reporting There are over 300 possible error messages that the operator may witness Some have to do with manual operation some have to do with automated operation and some have to do with unit errors or overload situations For example errors will be
194. ts at 240 lagging This assumes that the default phase angle is 0 360 Degrees lag and not 180 degrees If the 180 degree phase angle option is used then V3 will be at 120 Ifand 13 will be in phase with their respective voltages or 11 at 0 and I3 at 240 lag or 120 12 will be at 120 lag or 120 When the user inputs the MAX Watts value in the Transducer Setting Screen the firmware can calculate the required test currents for full scale value The formula required to calculate Watts for 2 1 2 Element transducer is V1 11 COS V3 I3 COS Y V1 12 COS 60 V3 12 COS 60 Total Watts Where Y is the incremental angular change between V1 and l1 and V3 and 3 with 12 changing at the same incremental angle as l1 and l3 Example The default voltage is 120 00 Volts AC and the user inputs 1500 Watts as Max Value The current required for full scale output from the transducer is 120 11 COS 0 120 13 COS 0 V1 12 COS 60 0 V3 12 COS 60 0 1500 Watts 11 500 Watts 120 Volts COS 0 or 11 500 120 then 11 12 and 13 will be 4 1667 Amperes each Therefore when the user inputs 1500 Watts in the MAX value window the test set should automatically show a test current value for 11 of 4 167 Amperes at an angle of 0 2 will be 4 167 at 120 120 and 3 will be 4 167 Amperes at an angle of 240 120 Note that the current is
195. ts a test multiple of 2 0 97 and for a time dial setting of 3 the operating time of the relay is say 2 000 seconds then the test set will apply 80 Watts to the relay and check to verify that the relay operated in 2 000 seconds Test Configuration The Test Configuration button will take the user to the Test Configuration Menu This menu is used to set additional test parameters such as ramp increment and start and stop points These test parameters should not need to be adjusted 3 8 7 1 Test Configuration Screen The test configuration menu is used to adjust the advanced relay testing parameters The TVI has default test parameters that should not need to be adjusted by the user If the user has determined these values do need to be adjusted then following the directions in the TVI Operations section Test Configuration Screen lest Frequency 60 Hz Pickup ramp Target Seal in ramp specifications specification Increment U cyt Increment incrementi 0 Cup 0020 Ta it 0020 ki Pulse Time Offfeyvc l Relay Settings Menu Figure 70 Test Configuration Screen Pickup Ramp Specifications Increment 10 cycles For the Power relay the test voltage is fixed at the Normal Volts value and the test current is ramped This value is used to control the how fast the MPRT will increase the current to determine the power pickup value The MPRT will calculate the pickup value based on the formula selected and the Normal Volt
196. ts the values to perform the relay timing test Impedance Timing Test Settings Test Frequency 60 Hz Relay Settings Prefault Voltage 69 25 N Current 3 0 Amps Angle Lagging 75 0 Degrees Time 100 0 mS Hold Test Amplitude Fault Value Fault Hold Test Amplitude Lott A m H Timer Setup Stop JO Latch On Open T2 Figure 35 Impedance Timing Test Setting Screen e The Pre fault Settings button will move to its screen and will allow changes to the relay specifications If factory defaults are used a one time warning message should be displayed to notify the factory default values are being used e The Relay Settings button will move to its screen and allows changes to the relay specifications e The Timer Setup screen will define how the timer will be used e The Fault type button determines the fault the test will perform The accepted values are AG BG CG AB BC CA and ABC Note A B and C are the phases and G is ground e The voltage and current generators may be enabled or disabled The default condition has all voltage and current generators enabled This is indicated by a check mark in the channels selection boxes If the Voltage is held the Stop value is expressed in Amps If the Current is held the Stop value is expressed in Volts The V I Generators used in the MPRT 8415 unit have 15 amps 150 volts RMS limit and the MPRT 8430 unit have 30 Amps 300 volts RMS limit The Stop value is the fault value for the test
197. tts and 1 000 mA 1500 0 Watts or 1mA 1500 0 W 0 00066666 mA Watt Therefore if the transducer had a measured output of 250 mA then the equvilent Watts output would be 0 250 mA 0 00066666 mA W 375 0 Watts Consider another example where the Min value is a negative value The following example is an AC Watt Transducer with the following settings The transducer will output a 1 mA at 500 Watts O mA at O Watts and 1 mA at a 500 Watts The scaling factor would look something like the following 1 000 mA 500 0 Watts or 1mA 500 0 W 0 002 mA Watt Therefore if the transducer had a measured output of 250 mA then the equvilent Watts output would be 0 250 mA 0 002 mA W 125 0 Watts And if transducer had a measured output of 450 mA then the equvilent Watts output would be 0 450 mA 0 002 mA W 225 0 Watts 137 Consider one more example for a Power Factor transducer where the Min changes to Lead and the Max changes to Lag and the associated output currents are 4 mA for a Leading Power factor of 5 and 20 mA for a Lagging Power Factor of 5 The Transducer Output window would look something like the following Transducer Quiput Lead Lag a Ja Voltage 0 000 10 000 E Curent Pwr Fact Accuracy The scaling factor would look something like the following 20 4 24 mA Dividing by 2 determines the midpoint or 12 mA 1 0 PF Therefore a rise of 8 mA from 4 to 12 is equal
198. u Screen This selection will return the controller to the Main Menu This selection will apply the set quantities displayed and begin the test After Start is pressed this button will turn red and display Stop Pressing Stop at any time will stop the test and turn the outputs off 3 8 6 2 Synchronous Relay Pickup Test Results This screen displays the results upon test completion No data may be entered in this screen Synchronous Pickup Test Settings Test Frequency 60 Hz Timer Mon C NO Latch Off Open Setup T3 Figure 66 Sync Relay Pickup Test Screen e The Relay Settings button will change screens and will allow changes to meet the manufacturer specifications The bottom of the screen has common buttons File This selection will take the user to the File Manager Batt Sim Off Batt Sim On This selection will turn the Battery Simulator On and Off Test Menu This selection will return the controller to the Test Menu Screen Main Menu This selection will return the controller to the Main Menu Start Stop This selection will apply the set quantities displayed and begin the test After Start is pressed this button will turn red and display Stop Pressing Stop at any time will stop the test and turn the outputs off 91 3 8 6 2 1 Testing Sync Check Synchronizing and Auto Synchronizing Relays To perform tests on synchronizing type relays requires the use of two voltage output modules Pick up or Closing A
199. uency 60 Hz Reach Reach Points Zone Operate Time ms Torque Test Connection Three Phase Y Figure 31 Impedance Relay Setting Screen The relay setting screen sets the relay values to test the impedance or distance relay The settings determine if the relay passed or failed when the test completes The Reach setting value is in Ohms with a range of 0 000 to 99 99 ohms The factory default is 10 ohms There are two parts to defining the torque setting lag or lead A lagging torque uses a range of 0 360 and the lead lag torque has a range of 180 to 180 The torque angle value has a range of 0 0 to 999 9 The default value will be set at 75 with current lagging voltage The user will only be able to enter a value of 180 if the 180 range is selected The Operating Time is the time in milliseconds with a range of 0 to 9999 milliseconds The factory default value is 100 milliseconds The Zone button is used to select the test label The unit tests a single zone at one time and has the information for that zone The factory default is Zone 1 Z1 The zone is used during the save operation to separate test data for each zone to save data for all zones in a single file The Zones are Z1 Z2 Z3 Z4 Z5 Z2R Z3R Z4R and Z5R The Target Tap has selectable values with a factory default of 0 2 DC amperes Select either Single Phase Three Phase Y or Three Phase Open Delta modes with the factory default set to Three Phase
200. unction as a talker listener as well as operate at speeds much faster than the serial bus which will send receive data in a parallel fashion This will allow DFR and EMTP files to be downloaded at a faster rate See section 2 2 3 9 for more description 5 Ethernet 10BaseT The Ethernet 10BaseT port will typically operate very efficiently and effectively in real time This port is the fastest communication method within this unit The setup will be similar to Microsoft Windows where one may set the protocol In addition this port provides the optimal method for downloading EMTP files DFR streaming and updating the unit s firmware as required See sections 2 2 3 7 and 6 2 for more descriptions 6 USB Interface Provides a communication port for connecting external devices such as the optional external binary input output box to the unit when more than 10 binary inputs and or more than 6 binary outputs are required 7 EPOCH High Current Interface Port The High Current Interface port is provided on the rear panel of the unit It is designed to interface with the Multi Amp Models EROCH II or EPOCH 20 High Current Output Units reference the EROCH 20 or EROCH II Bulletins for output specifications This port interfaces with the optional interface module box to provide control of up to three EROCH 20 or EROCH II current amplitude phase angle and frequency outputs Status of the EROCH 20 II output can be seen on the TVI display 8
201. urn the outputs off This selection will take the user to the File Manager This selection will turn the Battery Simulator On and Off This selection will return the controller to the Manual Test Menu 130 Main Menu This selection will return the controller to the Main Menu Dynamic Frequency Operation The MPRT can be programmed with the TVI to perform dynamic timing test on all under over frequency relays either electro mechanical or solid state single or multi set point To test a typical multi set point solid state under frequency relay the following procedure applies 1 In the Prefault setting window select V1 The Magnitude and Frequency values should already be set to the default normal Line Frequency and voltage values If not select the appropriate value s and change them using the touch screen and numeric keypad Set the Duration Time by using the touch screen and numeric keypad Time indicated is in seconds This time is the desired time which the output voltage and frequency will remain at the Prefault stage before switching to the Fault stage 2 Select Fault values by pressing the Fault Settings button Set the desired FAULT Frequency normally a value below under frequency or above over frequency the Tap or Setting value by using the touch screen and keypad This is the frequency that the output will delta or step down to during the Fault stage For doing a timing test enter the appropriate Duration Time for
202. wing screen Ed High Current Amplifier pf um English Update Figure 7 Main Menu Screen If a PC is connected the TVI will display the monitored outputs when the PC is in control of the unit The Timer button will be available to select time ONLY In addition the vector graph will be displayed on the TVI 21 2 2 1 Touch Panel Display The TVI Touch Panel Display is the means by which data is entered into the unit while the unit is in manual control The TVI will display all active ON generators in red and all selected but inactive OFF generators in green If a generator is not selected it will be grey If an entered value is out of range an error screen will appear to notify the setting is out of range 2 2 1 1 Keypad Entry The keypad entry provides an interface to the user when entering a value in the various screens Touching a data entry window on the TVI will activate the Numeric Keypad Pressing Enter or Cancel will return the user to the previous screen that is in use Pressing Ramp will select that value to ramp when using the control knob Pressing Clear will clear the value you just entered Figure 8 TVI Numeric Keypad 2 2 1 2 Alphanumeric Keypad The alphanumeric keypad allows the entry of ASCII text into the TVI This keypad is used to enter file names in length for the primary name and a 3 character extension in the file management screen This screen is also used when using the Transducer Test Sett
203. y 2 Connect the pair of current output leads from two of the unit s current channels to the relay under test so the current from each output is in parallel with one restraint and the operating coil of the relay Check to ensure both commons grounds or earths share the same relay terminal 3 Initiate the outputs Increase the output to the appropriate harmonic current It is recommended that 1 0 ampere of harmonic current be set it will make the math easier If using the HWAVE set the displayed current to 8 89 amperes RMS this equals 4 amperes DC half wave 4 Increase the fundamental current until the relay operates To calculate the percent of harmonic restraint use the appropriate equation below if using pure harmonic current If using the HWAVE refer to the manufacturer s instruction literature for the appropriate Harmonic Curve General Electric Type BDD 2nd H i Harmonic nd Harmonic Current 100 J fundamental 2nd Harmonic Westinghouse ABB Type HU A e Harmonic 1 2267 2nd Harmonic Current 100 J fundamental 2nd Harmonic H NOTE Restore the HWAVE channel to a sinewave upon test completion if the HWAVE feature was used 34 3 4 Voltage Sources 3 4 1 Outputs Summed Together Two voltage channels may be used to sum the voltage outputs to obtain higher than rated voltage provided the load is ungrounded Connect the load between the voltage channel posts set V Phase to 0 and set
204. y the set quantities displayed and begin the test After Start is pressed this button will turn red and display Stop Pressing Stop at any time will stop the test and turn the outputs off A link to Timer Setup configuration is be available on this screen Also the Timer Setup configuration is displayed for convenience The user selects the appropriate number of channels required pressing Land The amount of current required will be split proportionally between selected current channels The status of the relay contact will be displayed on the screen real time along with the value of the current s and the percentage error 68 3 8 3 6 Overcurrent Relay Timing Test Results This screen displays the results upon test completion No data may be entered in this screen Overcurrent Timing Test lest Frequency 60 Hz Timer Setup Stop HO Latch On Open 0 0000 Seconds L Star File Test Maiti Menu Menu Figure 47 Overcurrent Timing Test Screen The Instantaneous Target amp Seal In and Pickup test screens may be entered to change test settings The bottom of the screen has common buttons File This selection will take the user to the File Manager Batt Sim Off Batt Sim On This selection will turn the Battery Simulator On and Off Test Menu This selection will return the controller to the Test Menu Screen Main Menu This selection will return the controller to the Main Menu Start Stop This selection will apply the
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