Power Meter 710 Reference Manual
Contents
1. anna 17 Peak Demand orien DN NE 19 Demand Current Calculation Methods cccccceccssseseeeeeeeeeeeeeeeeeeaeees 19 Energy Reddings SR tats beca ede one 19 Power Analysis Values ii 20 MOGUCOM ec ET 21 Ger T chnical SUDDOTE ria 21 Bree zie 21 Power Meter SpecificatioNS_ i 23 misi Mc M TU MD ace 25 Supported MODBUS Commands ssssseseeeeeeeeeeneerennnns 36 Section TI sing this GUID Sy i atent 37 What Neid rar lle 37 Section Il Common Problems for 3 Wire and 4 Wire Systems 38 Section III 3 Wire System Troubleshooting 39 Section IV 4 Wire System Troubleshooting un 40 Field Example p E EUR 42 ice 43 PONS OT PEN 43 PARE VA OMS ER tenen o in mete enn ED ED AR eta gota da Gen 45 EET CR desde 47 I Power Meter 710 63230 501 209A1 Table of Contents 07 2008 il 2008 Schneider Electric All Rights Reserved 63230 501 209A1 07 2008 SECTION 1 INTRODUCTION POWER METER HARDWARE 2008 Schneider Electric All Rights Reserved Power Meter 710 Section 1 Introduction Figure 1 1 below shows the parts of the Power Meter 710 Table 1 1 describes each part Figure 1 1 Parts of the Power Meter 710 Table 1 1 Parts of the Power Meter A B Control power supply Connection for control power to the power meter connector Volt2. PLEASE NOTE Electrical equipment should be installed operated serviced and maintained only by qualified personnel No responsibility is assumed by Schneider Electric for any consequences arising out of the use of this material FCC NOTICE This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures e HReorient or relocate the receiving antenna e Increase the separation between the equipment and receiver e Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio TV technician for help 63230 501 209A1 07 2008 SECTION 1 INTRODUCTION SECTION 2 SAFETY PRECAUTIONS SECTION 3 OPERATION SECTION 4 METERING SECTION 5 MA
3. 2008 Schneider Electric All Rights Reserved Power Meter 710 Section 4 Metering Table 4 2 Demand Readings continued Demand Reactive Power 30 Total Last Complete Interval 0 to 3276 70 MVAR Demand Apparent Power 38 Total Last Complete Interval 0 to 3276 70 MVA Demand power is accumulated power during a specified period divided by the length of that period How the power meter performs this calculation depends on the method you select To be compatible with electric utility billing practices the power meter provides block interval demand The default demand calculation is set to rolling block with a 5 minute intervals and 5 subintervals In the block interval demand method you select a block of time that the power meter uses for the demand calculation You choose how the power meter handles that block of time interval Three different modes are possible Sliding Block In the sliding block interval you select an interval from 1 to 60 minutes in 1 minute increments Selection for subinterval is not required but configuration software automatically sets a subinterval If the interval is lt 15 minutes the subinterval is 15 seconds If the interval is 15 minutes the subinterval is 60 seconds The power meter displays the demand value for the last completed interval Fixed Block In the fixed block interval you select an interval from 1 to 60 minutes in 1 minute increments For the demand to be calculate
4. 3 of the expected value kVA 2 3 of the expected value Power factor may look abnormal 63230 501 209A1 Possible Causes The CT on the phase that reads 0 is short circuited Less than 296 current based on CT ratio flowing through the CT on the phase that reads 0 Possible Causes One CT polarity is backwards NOTE The only way this problem will usually be detected is by the Quick Check procedure It is very important to always calculate kW In this case it is the only symptom and will go unnoticed unless the calculation is done or someone notices backwards CT on a waveform capture Possible Causes One PT polarity is backwards NOTE The line to line voltage reading that does not reference the PT with backwards polarity will be the only correct reading Example Vyp 277 Vec 48C Voa 277 In this case the A phase PT polarity is backwards Vac is correct because it does not reference V Possible Causes PT metering input missing blown fuse open phase disconnect etc on the phase that reads zero NOTE The line to line voltage reading that does not reference the missing PT input will be the only correct reading Example V g 277 Vec 277 Vc 7 480 In this case the B phase PT input is missing Ven is correct because it does not reference Vp 2008 Schneider Electric All Rights Reserved 63230 501 209A1 07 2008 Table C 12 Section IV Case D Symptoms 4 Wire 3 phase kW 2 8 of the
5. 30 31 32 40 42 44 6 Press OK to return to the METER SETUP screen 7 Press t to return to the SETUP MODE screen Set Up Demand Current 1 In SETUP mode press until DMD lt l PowerLogc demand is visible CURRENT TEMANT 2 Press DMD demand setup 3 Press current 4 Enter the MIN demand interval in n1 minutes for current 1 to 60 Bi 5 Press OK 6 Press to return to the SETUP MODE screen MIN NOTE The calculation method used for current is Thermal 2008 Schneider Electric All Rights Reserved 9 Power Meter 710 Section 3 Operation Setup PQS Demand Set Up Passwords 10 63230 501 209A1 In SETUP mode press until DMD demand is visible Press DMD demand setup Press PQS real reactive apparent power Enter the MIN demand interval in MIN minutes for P power 1 to 60 Press OK Enter the SUB I number of sub intervals for P O to 60 Press OK Press to return to the SETUP MODE screen NOTE The calculation method used for power is based on SUB I as follows A E s In SETUP mode press until PASSW Press PASSW Enter the SETUP password Press OK Enter the RESET password to reset the power meter password Press OK to return to the SETUP MODE screen 0 sliding block 12 block gt 1 rolling block The SUB I value must divide evenly into the MIN value to the second For example you might set 2 subi
6. 32 767 A Rating of current transformers Secondary 5 or 1 A Primary 3 276 700 V max Voltage Secondary 100 110 115 120 Calculation interval for demand currents 1 to 60 minutes Calculation interval for demand power 1 to 60 minutes RS485 2 wire Communication protocol MODBUS RTU Communication address 1 to 247 Baud rate communication speed 2400 4800 9600 19200 bauds When certain readings reach their highest or lowest value the Power Meter saves the values in its nonvolatile memory These values are called the minimum and maximum min max values The min max values stored since the last min max reset can be viewed using the Power Meter display See Table 4 1 for a list of the minimum and maximum values stored in the PM710 The min max value for power factor is based on the unsigned or absolute value of power factor The min max value for power factor is based on the unsigned or absolute value of power factor The power meter provides a variety of demand readings Table 4 2 lists the available demand readings and their reportable ranges Table 4 2 Demand Readings Demand Readings Reportable Range Demand Current Per Phase Last Complete Interval 0 to 32 767 A Peak 0 to 32 767 A Demand Real Power 30 Total Last Complete Interval 0 to 3276 70 MW Peak 0 to 3276 70 MW 2008 Schneider Electric All Rights Reserved 63230 501 209A1 07 2008 Demand Power Calculation Methods Block Interval Demand
7. Troubleshooting Potential Problem Possible Cause Possible Solution Verify voltage and current inputs range The Voltage input metering When the maintenance icon is range is 10 480 L L VAC direct or illuminated it indicates the 10 277 L N VAC direct or up to The maintenance icon metered signals have reached 1 6 MV with external VT The is illuminated anne saturation point or the Current input metering range IS 5 power meter display frequency is out of range mA 6 A In addition verify that the current and voltage inputs are free of noise Call Technical Support or contact your local sales representative for assistance The display is blank Verify that the power meter line L after EL control The power meter may not be ui ei snai ils GS Verify that the heartbeat LED is pee blinking Check the fuse For further detail refer to Register 4112 2008 Schneider Electric All Rights Reserved 21 Power Meter 710 63230 501 209A1 Section 5 Maintenance and Troubleshooting 07 2008 Table 5 1 Troubleshooting continued Check that the correct values have been entered for power meter setup Incorrect setup values parameters CT and PT ratings System Type Nominal Frequency and SO On Check power meter voltage input Incorrect voltage inputs terminals to verify that adequate The data being voltage is present displayed is inaccurate or not what you expect POWer meter is wired improperly See App
8. diagnostics is visible 2 Press METER 3 View the meter information model number operating system firmware version reset system firmware version and power meter serial number 4 Press to return to the MAIN screen 2008 Schneider Electric All Rights Reserved Power Meter 710 Section 3 Operation METER INFO Tid cucu uu H3BcHRHUJ METER 13 Power Meter 710 63230 501 209A1 Section 3 Operation 07 2008 14 2008 Schneider Electric All Rights Reserved 63230 501 209A1 07 2008 SECTION 4 METERING POWER METER CHARACTERISTICS Power Meter 710 Section 4 Metering The power meter measures currents and voltages and reports in real time the rms values for all three phases and neutral In addition the power meter calculates power factor real power reactive power and more Table 4 lists the main or most important metering characteristics of the power meter Table 4 1 Power Meter Characteristics Instantaneous rms Values Current Voltage Frequency Active power Reactive power Apparent power Power factor Energy Values Active energy total Reactive energy total Apparent energy total Operating time Demand Values Current Active reactive apparent power Maximum Demand Values Maximum current Maximum active power Maximum reactive power Maximum apparent power Power quality Values Total harmonic distortion THD Per phase neutral average of 3 phases Ave
9. may be changed by navigating to the appropriate screen and entering new values Other values may be changed using the Reset function Use the instructions in the following sections to change values See Resetting the Power Meter on page 12 for more information on the Reset function NOTE New values are automatically saved when you exit the screen The PM710 screen is able to display nomenclatures for both IEC and IEEE modes Table 3 2 shows the nomenclature for each mode The different nomenclatures do not affect any of the meter calculations See Set Up Meter s Visualization Mode on page 11 for changing the meter mode Table 3 2 PM710 Mode Nomenclatures Measurement Symbols IEEE Phase labels ABC Voltage U V VL L VL N Power W VAR VA Energy Wh VARh VAh Power Factor Total no sign Menu Selections IEC IEEE Voltage VOLTS Power PQS PWR Power Factor PF Diagnostics DIAGN NOTE Power factor is an absolute reading The power meter does not consider a sign for power factor Real and Reactive Power and Energy are absolute or unsigned readings The power meter adds energy and power as a positive regardless of the flow direction To begin power meter setup do the following 1 Scroll through the menu list at the bottom of the screen until you see SETUP 2 Press SETUP 3 Enter your password NOTE The default password is 00000 See Set Up Passwords for information on how to change Follow the dire
10. 1 Reactive Energy IEC 62053 23 Class 2 Data update rate 1s 10 to 480 V AC direct L L 10 to 277 V AC direct L N Power Factor Measurement Accuracy Frequency Real Energy Measured voltage Up to 1 6 MV AC with external VT The starting of the measuring voltage depends on the PT ratio 1 2 Un Input voltage Metering over range Impedance 2 MQ L L 1 MO L N 45 to 65 Hz Adjustable from 1 A to 32767 A 5AoriA Frequency range CT Primary ratings Secondary Measurement input range 10 mA to 6 A 15 A continuous Input current Permissible overload 150 A for 10 seconds per hour 120 A for 1 second per hour lt 0 12 Q Impedance lt 0 15 VA 100 to 415 10 V AC 5 VA 50 to 60 Hz Control Power 125 to 250 20 V DC 3W 100 ms at 120 V AC Ride through time Mechanical Characteristics Weight IP degree of protection IEC 60529 0 37 kg Designed to IP52 front display IP30 meter body 96 x 96 x 69 mm meter with display Dimensions 96 x 96 x 50 mm behind mounting surface Environmental Characteristics Operating Meter 5 C to 60 C temperature Display 10 C to 55 C Storage Meter display 40 C to 85 C temperature Humidity rating 5 to 95 RH at 50 C non condensing 2 Pollution degree Metering category voltage inputs and CAT Ill for distribution systems up to 277 V L N control power 480 V AC L L As per IEC61010 UL508 PISOS na Double insulate
11. 1 209A1 Appendix B Register List 07 2008 Table B 2 Register Listing Metered Data continued Metered Data E SW Ll a 01 DOI EN me pp wml me IE nf eae Der om farem EI EC CI ESC I EN ERC o pese Can gr dd en ESCO O ESCO ea E Cee preme ESC CI SCI fe Ce e IA O ES SCO a Ce p IA O ESSO SENS IO IO ESSO a E IO ES ESCO a ICI IIS CI ESE CIE NN CECI GECO NN ICE O EER SENS ICI ESE CI ESSI SENS EEC ERO ES ERIC SENS EEES CI SEC NN em rm Ime e Pam cen hr RO Read Only R W Read Write NV Nonvolatile 28 2008 Schneider Electric All Rights Reserved 63230 501 209A1 Power Meter 710 07 2008 Appendix B Register List Table B 2 Register Listing Metered Data continued Metered Data a DIR NCA CRC NRC CR ESCACS ESC IE NC NS E Dr rer Dr mt ea E aa Tam GEO E Dan me Due fe or Dr mt E M Pr rer Dr un sen fin NS M Pr rr por Dr ment pm e M Pr rr pr Dr ment sen fan NS e forme Pr rr ef mI Ce forme e fet ef femme fo Tae femme foe fete mE ae Pre foe fet ef femme fo an Pena foe fet ef femme f ae none Pome fete Te fo oe Para foe fete Te fo ae Parra foe fet ef fem f Ces femmine Der ar ee RO Read Only R W Read Write NV Nonvolatile 2008 Schneider Electric All Rights Reserved 29 Power Meter 710 63230 501 209A1 Appendix B Register List 07 2008 Table B 3 Register Listing Demand Values Demand Values Reg Name Size Type Access NV Scale Un
12. INTENANCE AND TROUBLESHOOTING APPENDIX A SPECIFICATIONS APPENDIX B REGISTER LIST APPENDIX C INSTRUMENT TRANSFORMER WIRING TROUBLESHOOTING GUIDE GLOSSARY INDEX 2008 Schneider Electric All Rights Reserved Power Meter 710 Table of Contents Power Meter Hardware 1 Power Meter Parts and Accessories 2 BOX Gel laicale 2 ZUNE LE S RHONE SOCI AR GR SERIA 2 Bel re You BOITES iaio citen elet 3 Operating the Display i 5 How the Buttons Works 5 Menu Overvi W MERERETUR alor tirent 6 Setting Up the Power Meter iii 7 Set Up Power Meter Rs 7 scippi 8 SCKUp PTS plain 8 Set Up System Frequency ei 8 Set Up Meter System Type i 9 Set Up Demand Current ieroci ani a 9 Sep POS Demand i ella LL LELLA 10 Ser Up T assWOlGlS 9 iero 10 Set Up Communications 11 Set Up Bar Graph Scale i 11 Set Up Meter s Visualization Mode i 11 Resetting the Power Meter Us 12 Initialize the Meter nennen 12 eser Individilal Valles atreta ee teta meses 12 Viewing Meter Information iii 13 Power Meter Characteristics ui 15 MOBDBUS RS495 lc 16 Min Max Values for Real time Readings 16 Power Factor Min Max Conventions i 16 Demand ReadiNgS css nia 16 Demand Power Calculation Methods
13. Power Meter 710 Reference Manual 63230 501 209A1 Instruction Bulletin Schneider HAZARD CATEGORIES AND SPECIAL SYMBOLS Read these instructions carefully and look at the equipment to become familiar with the device before trying to install operate service or maintain it The following special messages may appear throughout this bulletin or on the equipment to warn of potential hazards or to call attention to information that clarifies or simplifies a procedure The addition of either symbol to a Danger or Warning safety label indicates that an electrical hazard exists which will result in personal injury if the instructions are not followed This is the safety alert symbol It is used to alert you to potential personal injury hazards Obey all safety messages that follow this symbol to avoid possible injury or death A DANGER DANGER indicates an imminently hazardous situation which if not avoided will result in death or serious injury A WARNING WARNING indicates a potentially hazardous situation which if not avoided can result in death or serious injury A CAUTION CAUTION indicates a potentially hazardous situation which if not avoided can result in minor or moderate injury CAUTION CAUTION used without the safety alert symbol indicates a potentially hazardous situation which if not avoided can result in property damage NOTE Provides additional information to clarify or simplify a procedure
14. ad Only R W Read Write NV Nonvolatile 34 2008 Schneider Electric All Rights Reserved 63230 501 209A1 Power Meter 710 07 2008 Appendix B Register List Table B 4 Register Listing Min Max Values continued Min Max values Range Nee Reg Name Sie Access NV Scale Units Maximum Maximum Maximum RO Read Only R W Read Write NV Nonvolatile Table B 5 Register Listing Reset Commands Reset Commands Write commands to Register 4126 Register Energy value to appear in register 7016 4000 7017 4001 7018 4002 Preset Energy Values 7019 4003 7020 4004 NOTE Register List is bsed on Firmware versions 2 020 2008 Schneider Electric All Rights Reserved 35 Power Meter 710 Appendix B Register List SUPPORTED MODBUS COMMANDS 36 63230 501 209A1 07 2008 Table B 6 Modbus Commands Report ID Return String byte 1 Ox11 0x11 byte 2 number of bytes following without crc byte 3 ID byte 250 byte 4 status OxFF bytes 5 ID string PM710 Power Meter last 2 bytes CRC Read device identification BASIC implementation 0x00 0x01 0x02 data conformity level 1 Object Values 0x01 If register 4128 is 0 then Merlin Gerin If register 4128 is 1 then 0x2B Square D 0x02 PM710 0x03 Vxx yyy where xx yyy is the OS version number This is the reformatted version of register 7001 If the value for register 7001 is 12345 then the 0x03 data woul
15. age inputs Voltage metering connections Current inputs Current metering connections The RS485 port is used for communications with a monitoring and control system This port can be daisy chained to multiple devices Steady OFF ON Flashing communications LED ps indicator Retainer clips Used to hold power meter in place Use for installation locations thinner than 3 mm 1 8 Retainer slots position A in Use for installation locations 3 6 mm 1 8 to 1 4 Retainer slots position B in RS485 port COM1 Power Meter 710 Section 1 Introduction Power Meter Parts and Accessories Box Contents FIRMWARE 63230 501 209A1 07 2008 Table 1 2 Power Meter Parts and Accessories Description Model Number PM710 Power Meter with Integrated Display PM710MG This instruction bulletin is written to be used with firmware version 2 020 See Viewing Meter Information on page 13 for instructions on how to determine the firmware version 2008 Schneider Electric All Rights Reserved 63230 501 209A1 Power Meter 710 07 2008 Section 2 Safety Precautions SECTION 2 SAFETY PRECAUTIONS BEFORE YOU BEGIN This section contains important safety precautions that must be followed before attempting to install service or maintain electrical equipment Carefully read and follow the safety precautions outlined below A DANGER HAZARD OF ELECTRIC SHOCK EXPLOSION OR ARC FLASH Apply appropriate personal prote
16. aie OWAIN E absolute current on at least one phase is gt E ED 4106 ce or Integer Power of 10 voltage 4107 pea FAGOR 1 Integer N Power of 10 power energy e Icon Control bitO VA Saturation bit1 VB Saturation bit2 VC Saturation 4112 Error Bitmap Integer bit3 IA Saturation bit4 IB Saturation bit5 IC Saturation bit6 Freq Invalid bit7 bit15 Reserved oem DBITISHO Integer ETS oe curen Demand Only EE di 4118 deuda Ma EN Integer Minutes oem puto in minutes Interval KA Sliding Block Calculation If Reg 4118 2 15 Minutes the Power Block Demand Sub interval is 15 Seconds 4119 Number of Sub Integer Seconds if Reg 4118 15 Minutes the Intervals Sub interval is 60 Seconds 1 Fixed Block else Rolling Block Ca pense De Ci remat me pp DS Ce prece P mat o Te ERC ee CI ES EC I RO Read Only R W Read Write NV Nonvolatile 2008 Schneider Electric All Rights Reserved 25 Power Meter 710 63230 501 209A1 Appendix B Register List 07 2008 Table B 1 Register Listing Setup and Status continued Setup amp Status See EE V_ Scale units Range Notes 4124 PT Ratio Secondary 4125 Service Frequency meger 100 110 115 g 120 Always return a 0 4126 Reset Commands 1 Integer R W N N A A list of commands is shown in Table B 5 10 11 12 30 31 a Units RO Read Only R W Read Write NV Nonvolatile The PM710 includes registers in two di
17. block method communications link a chain of devices connected by a communications cable to a communications port current transformer CT current transformer for current inputs demand average value of a quantity such as power over a specified interval of time device address defines where the power meter resides in the power monitoring system event the occurrence of an alarm condition such as Undervoltage Phase A configured in the power meter firmware operating system within the power meter fixed block an interval selected from 1 to 60 minutes in 1 minute increments The power meter calculates and updates the demand at the end of each interval float a 32 bit floating point value returned by a register The upper 16 bits are in the lowest numbered register pair For example in the register 4010 11 4010 contains the upper 16 bits while 4011 contains the lower 16 bits frequency number of cycles in one second line to line voltages measurement of the rms line to line voltages of the circuit line to neutral voltages measurement of the rms line to neutral voltages of the circuit maximum demand current highest demand current measured in amperes since the last reset of demand maximum demand real power highest demand real power measured since the last reset of demand maximum demand voltage highest demand voltage measured since the last reset of demand maximum demand highest demand measur
18. ctions in the following sections to set up meter values NOTE All screen displays show IEC nomenclature Power Meter 710 Section 3 Operation Set Up CTs E Xx ds qi Set Up PTs Eb moe X m 10 Set Up System Frequency 4 Select the frequency In SETUP mode press until METER In SETUP mode press until METER In SETUP mode press until METER 63230 501 209A1 is visible Press METER Press CT Enter the PRIM primary CT number Press OK Enter the SEC secondary CT number Press OK to return to the METER SETUP screen Press t to return to the SETUP screen is visible Press METER Press PT Enter the SCALE value x1 x10 x100 Ir NO PT for direct connect ILL Press OK Enter the PRIM primary value Press OK Enter the SEC secondary value Press OK to return to the METER SETUP screen Press t to return to the SETUP MODE screen PRIM is visible Press until F system frequency is visible Press F Press OK to return to the METER SETUP screen Press to return to the SETUP MODE screen 07 2008 2008 Schneider Electric All Rights Reserved 63230 501 209A1 Power Meter 710 07 2008 Section 3 Operation Set Up Meter System Type 1 In SETUP mode press until METER is visible 2 Press METER 3 Press b until SYS system type is visible 4 Press SYS 5 Select the SYS system type 10 11 12
19. ctive equipment PPE and follow safe electrical work practices In the USA see NFPA 70E Only qualified electrical workers should install this equipment Such work should be performed only after reading this entire set of instructions NEVER work alone Before performing visual inspections tests or maintenance on this equipment disconnect all sources of electric power Assume that all circuits are live until they have been completely de energized tested and tagged Pay particular attention to the design of the power system Consider all sources of power including the possibility of backfeeding Turn off all power supplying the power meter and the equipment in which it is installed before working on it Always use a properly rated voltage sensing device to confirm that all power is off Before closing all covers and doors carefully inspect the work area for tools and objects that may have been left inside the equipment Use caution while removing or installing panels so that they do not extend into the energized bus avoid handling the panels which could Cause personal injury The successful operation of this equipment depends upon proper handling installation and operation Neglecting fundamental installation requirements may lead to personal injury as well as damage to electrical equipment or other property NEVER bypass external fusing NEVER short the secondary of a PT NEVER open circuit a CT use the shorting block to short circuit t
20. d as a fixed block the subinterval value has to be set to 1 The power meter calculates and updates the demand at the end of each interval e Rolling Block In the rolling block interval you select an interval and a subinterval The subinterval must divide evenly into the interval to the second The value here has to be gt 1 For example you might set 2 subintervals for a 15 minute interval The meter will calculate the subinterval period to be 7 5 minutes or 450 seconds Demand is updated at each subinterval The power meter displays the demand value for the last completed interval Figure 4 1 illustrates the three ways to calculate demand power using the block method For illustration purposes the interval is set to 15 minutes 17 Power Meter 710 Section 4 Metering 18 PLSD110131 63230 501 209A1 07 2008 Figure 4 1 Block Interval Demand Examples amp Demand value is the average for 15 minute interval the last completed interval Sliding Block _ Demand value Calculation updates is the average at the end of the interval for last N completed interval 15 minute interval 15 minute interval 30 Fixed Block Calculation updates at amp Demand value the end of the subinterval 5 min is the average for last completed 15 minute interval interval 35 Rolling Block 2008 Schneider Electric All Rights Reserved 63230 501 209A1 Power Meter 710 07 2008 Section 4 M
21. d be V12 345 2008 Schneider Electric All Rights Reserved 63230 501 209A1 07 2008 Power Meter 710 Appendix C Instrument Transformer Wiring Troubleshooting Guide APPENDIX C INSTRUMENT TRANSFORMER WIRING TROUBLESHOOTING GUIDE SECTION I USING THIS GUIDE What is Normal 2008 Schneider Electric All Rights Reserved Abnormal readings in an installed meter can sometimes signify improper wiring This appendix is provided as an aid in troubleshooting potential wiring problems NOTE The information in this appendix is intended to be general in nature and covers a variety of metering devices The Power Meter 710 does not display signed readings for Power Engergy or Power Factor Throughout this appendix when values are stated in terms of positive negative or lagging for the Power Meter 710 those readings are absolute The following sections contain Case tables showing a variety of symptoms and probable causes The symptoms listed are ideal and some judgment should be exercised when troubleshooting For example if the kW reading is 25 but you know that it should be about 300 kW go to a table where kW 0 is listed as one of the symptoms Section Il Common Problems for 3 Wire and 4 Wire Systems addresses symptoms and possible causes that occur regardless of system type Check this section first If the symptoms are more complicated proceed to Section Ill 3 Wire System Troubleshooting or Sec
22. d front panel display Altitude 3000 m 23 Power Meter 710 63230 501 209A1 Appendix A Specifications 07 2008 Table A 1 Specifications continued Electromagnetic Compatibility Electrostatic discharge Level III IEC 61000 4 2 IEC 61000 4 3 IEC 61000 4 4 IEC 61000 4 5 Conducted immunity Level III IEC 61000 4 6 Level III IEC 61000 4 8 Level III IEC 61000 4 11 CE commercial environment FCC part 15 class B EN55011 IEC 61000 3 2 IEC 61000 3 3 _ Immunity to radiated fields Level III PS Immunity to fast transients Level Ill m a x Immunity to impulse waves Level Ill PS Immunity to magnetic fields Immunity to voltage dips Conducted and radiated emissions Harmonics Flicker emissions 2 wire 2400 4800 9600 or 19200 baud Parity RS485 port Even Odd None 1 stop bit Modbus RTU Display Characteristics Back lit green LCD 6 lines total 4 concurrent Dimensions 73 x 69 mm values 24 2008 Schneider Electric All Rights Reserved 63230 501 209A1 Power Meter 710 07 2008 Appendix B Register List APPENDIX B REGISTER LIST REGISTER LIST Table B 1 Register Listing Setup and Status Setup amp Status Rage Notes 0 This combination timer counts the 1204 Usage Hours Float Hous total time for which the absolute current on at least one phase is gt 0 1Amp This combination timer counts the 1206 Usage Minutes Float Minutes 0 0 59 0 O
23. eads are swapped AND one instrument transformer has backwards polarity look for Vc 4 3 high or phase B current 3 high kVAR positive or negative with magnitude of close to what is expected for kW kVA expected magnitude l l T The power meter is metering a purely capacitive load this is unusual in PF near 0 up to about 0 7 lead this case kW and kVAR will be positive and PF will be near 0 lead See NOTE on page 37 2008 Schneider Electric All Rights Reserved 39 Power Meter 710 Appendix C Instrument Transformer Wiring Troubleshooting Guide 07 2008 Table C 8 Section IlI Case E Symptoms 3 Wire One phase current reads 0 kVA about 1 2 of the expected value kW kVAR and power factor can be positive or negative of any value See NOTE on page 37 SECTION IV 4 WIRE SYSTEM TROUBLESHOOTING Table C 9 Section IV Case A Symptoms 4 Wire kW 1 3 of the expected value KVAR 1 3 of the expected value power factor 1 3 of the expected value All else is normal Table C 10 Section IV Case B Symptoms 4 Wire kW 1 3 of the expected value RVAR 1 3 of the expected value 2 of the 3 line to line voltages are A3 low power factor 1 3 of the expected value All else is normal Table C 11 Section IV Case C Symptoms 4 Wire 40 One line to neutral voltage is zero 2 of the 3 line to line voltages are A3 low kW 2 3 of the expected value RVAR 2
24. ed since the last reset of demand 43 Power Meter 710 Glossary 44 63230 501 209A1 07 2008 maximum value highest value recorded of the instantaneous quantity such as Phase A Current Phase A Voltage etc since the last reset of the minimums and maximums minimum value lowest value recorded of the instantaneous quantity such as Phase A Current Phase A Voltage etc since the last reset of the minimums and maximums nominal typical or average parity refers to binary numbers sent over the communications link An extra bit is added so that the number of ones in the binary number is either even or odd depending on your configuration Used to detect errors in the transmission of data phase currents rms measurement in amperes of the rms current for each of the three phases of the circuit See also maximum value phase rotation refers to the order in which the instantaneous values of the voltages or currents of the system reach their maximum positive values Two phase rotations are possible A B C or A C B potential transformer PT also known as a voltage transformer power factor PF irue power factor is the ratio of real power to apparent power using the complete harmonic content of real and apparent power Calculated by dividing watts by volt amperes Power factor is the difference between the total power your utility delivers and the portion of total power that does useful work Power factor is the d
25. egree to which voltage and current to a load are out of phase real power calculation of the real power 3 phase total and per phase real power calculated to obtain kilowatts rms root mean square Power meters are true rms sensing devices rolling block a selected interval and subinterval that the power meter uses for demand calculation The subinterval must divide evenly into the interval to the second Demand is updated at each subinterval and the power meter displays the demand value for the last completed interval scale factor multipliers that the power meter uses to make values fit into the register where information is stored safety extra low voltage SELV circuit a SELV circuit is expected to always be below a hazardous voltage level short integer a signed 16 bit integer sliding block an interval selected from 1 to 60 minutes in 1 minute increments If the interval is between 1 and 15 minutes the demand calculation updates every 15 seconds If the interval is between 16 and 60 minutes the demand calculation updates every 60 seconds The power meter displays the demand value for the last completed interval system type a unique code assigned to each type of system wiring configuration of the power meter thermal demand demand calculation based on thermal response Total Harmonic Distortion THD or thd indicates the degree to which the voltage or current signal is distorted in a circuit total po
26. em and displays the menu item s screen When you have reached the highest menu level a black triangle appears beneath the selected menu item To return to the previous menu level press the button below t To cycle through the menu items in a menu list press the button below Table 3 1 describes the button symbols Table 3 1 Button Symbols Navigation View more menu items on the current level AN Return to the previous menu level Indicates the menu item is selected and there are no menu levels below the current level Change Values Change values or scroll through the available options When the end of a range is reached pressing again returns to the first value or option Select the next position in a number AL Move to the next editable field or exit the screen if the last editable field UK is selected NOTE e Each time you read press in this manual press and release the appropriate button beneath a menu item For example if you are asked to Press PHASE you would press and release the button below the PHASE menu item e Changes are automatically saved and take effect immediately 2008 Schneider Electric All Rights Reserved 5 Power Meter 710 Section 3 Operation Changing Values MENU OVERVIEW 63230 501 209A1 07 2008 When a value is selected it flashes to indicate that it can be modified A value is changed by doing the following e Press or to change numbers or scrol
27. endix C Instrument Check that all CTs and PTs are Transformer Wiring connected correctly proper polarity is Troubleshooting Guide observed and that they are energized on page 37 for more Check shorting terminals information on troubleshooting wiring problems Power meter address is Check to see that the power meter is incorrect correctly addressed Verify that the baud rate of the power Power meter baud rate parity meter matches the baud rate of all Cannot communicate stop bit is incorrect other devices on its communications with power meter from link a remote personal computer Communications lines are Verify the power meter communications improperly connected connections Check to see that a multipoint communications terminator is properly installed Communications lines are improperly terminated 22 2008 Schneider Electric All Rights Reserved 63230 501 209A1 07 2008 Power Meter 710 Appendix A Specifications APPENDIX A SPECIFICATIONS POWER METER SPECIFICATIONS 2008 Schneider Electric All Rights Reserved Table A 1 Specifications Electrical Characteristics True rms up to the 15th harmonic on three phase Type of measurement AC system 3P 3P N 32 samples per cycle Current 30 596 from 1A to 6A Voltage 10 596 from 50 V to 277 V 310 0031 from 1A to 6A and from 0 50 to 0 5 PF 1 096 0 02 Hz from 45 to 65 Hz IEC 62053 21 Class 1 0 ANSI C12 16 Accuracy Class
28. er meter calculates and stores accumulated energy values for real reactive and apparent energy You can view accumulated energy from the display The resolution of the energy value will automatically change through the range of 000 000 kWh to 000 000 MWh 000 000 kVAh to 000 000 MVARh Energy values can be reported over communications in two formats scaled long integer and floating point The units are always kWh KVARh or kVAh The long integer values are limited to 2 147 483 647 x the scale factor The floating point values are limited to 1 84 x 1018 2008 Schneider Electric All Rights Reserved 19 Power Meter 710 63230 501 209A1 Section 4 Metering 07 2008 POWER ANALYSIS VALUES The power meter provides power analysis values for Total Harmonic Distortion THD THD is a quick measure of the total distortion present in a waveform and is the ratio of harmonic content to the fundamental It provides a general indication of the quality of a waveform THD is calculated for both voltage and current The power meter uses the following equation to calculate THD where H is the harmonic distortion RMS run n x 100 H 20 2008 Schneider Electric All Rights Reserved 63230 501 209A1 Power Meter 710 07 2008 Section 5 Maintenance and Troubleshooting SECTION 5 MAINTENANCE AND TROUBLESHOOTING INTRODUCTION The power meter does not contain any user serviceable parts If the power meter requires service contact your loca
29. etering Peak Demand In nonvolatile memory the power meter maintains a running maximum for power and current demand values called peak demand The peak is the highest average for each of these readings per phase current demand RVVD RVARD and kVAD since the last reset Table 4 2 on page 16 lists the available peak demand readings from the power meter You can reset peak demand values from the power meter display From the Main Menu select MAINT gt RESET gt DMD You should reset peak demand after changes to basic meter setup such as CT ratio or system type Demand Current Calculation Methods The power meter calculates demand current using the thermal demand method The default interval is 15 minutes but you can set the demand current interval between 1 and 60 minutes in 1 minute increments Thermal Demand The thermal demand method calculates the demand based on a thermal response which mimics thermal demand meters The demand calculation updates at the end of each interval You select the demand interval from 1 to 60 minutes in 1 minute increments In Figure 4 2 the interval is set to 15 minutes for illustration purposes Figure 4 2 Thermal Demand Example The interval is a window of time that moves across the timeline ast completed demand interval Time minutes rr met e 15 minute next interval 15 minute interval Calculation updates at the end of each interval ENERGY READINGS The pow
30. expected value 3 phase kVAR 2 8 of the expected value 3 phase kVA 2 3 of the expected value One phase current reads 0 All else is normal Table C 13 Section IV Case E ymptoms 4 Wire kW near 0 kVA near 0 3 phase average power factor flip flopping lead and lag Voltages currents and kVA are normal Table C 14 Section IV Case F Symptoms 4 Wire kW negative and less than RVAR KVAR negative and close to value expected for kW kVA expected value Power factor low and leading Voltages and currents are normal Table C 15 Section IV Case G Symptoms 4 Wire kW negative and less than RVAR KVAR positive and close to the value for KW NOTE looks like kW and kVAR swapped places kVA expected value Power factor low and lagging Voltages and currents are normal 2008 Schneider Electric All Rights Reserved Power Meter 710 Appendix C Instrument Transformer Wiring Troubleshooting Guide Possible Causes The CT on the phase that reads 0 is short circuited Less than 296 current based on CT ratio flowing through the CT on the phase that reads 0 Possible Causes Two CT secondary leads are swapped A phase on B phase terminal for example Two PT secondary leads are swapped A phase on B phase terminal for example NOTE In either case the phase input that is not swapped will read normal lagging power factor Possible Causes All three PT lead connections rotated countercl
31. fferent formats integer and floating point For example Real Power A is included in Register 1066 and 1067 floating point and register 4036 integer Table B 2 Register Listing Metered Data Metered Data esa 1000 Real Energy Total mm fe kWh Absolute 1002 Apparent Energy Float kVAh Total 1004 Reactive Energy Float kVARh Absolute Total Average Voltage L N 3P Average Ei p e ferme fe pm Te pe ES ES pp Ce pe Par a fee Ces fe effete e Ces fee taf CI EN e RO Read Only R W Read Write NV Nonvolatile 1016 Float Volt 26 2008 Schneider Electric All Rights Reserved 63230 501 209A1 Power Meter 710 07 2008 Appendix B Register List Table B 2 Register Listing Metered Data continued Metered Data a ee Ce ee Mem otel Tooo Ce fe effete e i ES EE NEN RN Cepe ES EE fp Ce pen ES EE NEN RN CECI ESE fete f fp Ce fee taf ESE fp S Cm few ef fete fe f IC fe fee fet fw fm Cow fem fe fee fete fw bm Tom fem ffm fet fw fm CRT EE fete fem DS e Tam ARE fet fem ES Dan femme ee er NEN RN E fe fee CITES NN RS om Tema fe fmm er fom fm Cie fem fa fmm fet fom fe RS Co fare fof fet f CI Tom Tema fe fm ro fem Tow Tamara fa foe fet f wmf CECCO fe fm fet f wmf CECCO fa fm fet RNCS CECCO E fet wwf De mes rim wwf RO Read Only R W Read Write NV Nonvolatile 2008 Schneider Electric All Rights Reserved 27 Power Meter 710 63230 50
32. gnitude Positive RVAR Normal lagging power factor See NOTE on page 37 Table C 3 Section II Case C Symptoms 3 Wire and 4 Wire Frequency is an abnormal value may or may not be a multiple of 50 60 Hz kVA 3 x VagX I3 avg 1000 PFsoavg lagging in the range 0 70 to 1 00 for 4 wire systems all phase PFs are about the same e Phase currents approximately equal Phase voltages approximately equal A quick check for proper readings consists of kW comparisons calculated using the equation above and compared to the meter reading and a reasonable lagging 3 phase average power factor reading If these checks are okay there is little reason to continue to check for wiring problems Possible Causes CT secondaries shorted Less than 296 load on power meter based on CT ratio Example with 100 5 CT s at least 2A must flow through CT window for power meter to wake up Possible Causes All three CT polarities backwards could be CTs are physically mounted with primary polarity mark toward the load instead of toward source or secondary leads swapped All three PT polarities backwards again could be on primary or secondary NOTE Experience shows CTs are usually the problem Possible Causes PTs primary and or secondary neutral common not grounded values as high as 275 Hz and as low as 10 Hz have been seen System grounding problem at the power distribution transformer such as 38 utilit
33. he leads of the CT before removing the connection from the power meter Before performing Dielectric Hi Pot or Megger testing on any equipment in which the power meter is installed disconnect all input and output wires to the power meter High voltage testing may damage electronic components contained in the power meter e The power meter should be installed in a suitable electrical enclosure Failure to follow this instruction will result in death or serious injury 2008 Schneider Electric All Rights Reserved 3 Power Meter 710 63230 501 209A1 Section 2 Safety Precautions 07 2008 4 2008 Schneider Electric All Rights Reserved 63230 501 209A1 Power Meter 710 07 2008 Section 3 Operation SECTION 3 OPERATION OPERATING THE DISPLAY The power meter is equipped with a large back lit LCD display It can display up to five lines of information plus a sixth row of menu options Figure 3 1 shows the different parts of the power meter display Figure 3 1 Power Meter Display Type of measurement Alarm indicator Maintenance icon Bar Graph Units K BENNETTI Menu items A BENNE TOOT So 100 Selected menu indicator Button J Return to previous menu Values Phase ACT ITOMMOO DW gt How the Buttons Work The buttons are used to select menu items display more menu items in a menu list and return to previous menus A menu item appears over one of the four buttons Pressing a button selects the menu it
34. ing correctly suspect two CT leads swapped Since A phase power factor is the only one that has a normal looking lagging value suspect B and C phase CT leads may be swapped After swapping B and C phase CT leads all readings went to the expected values problem solved See NOTE on page 37 2008 Schneider Electric All Rights Reserved 63230 501 209A1 07 2008 GLOSSARY TERMS 2008 Schneider Electric All Rights Reserved Power Meter 710 Glossary absolute energy both energy in and out of the load are treated as additive absolute power both power in and out of the load are treated as additive accumulated energy energy can accumulates in either signed or unsigned absolute mode In signed mode the direction of power flow is considered and the accumulated energy magnitude may increase and decrease In absolute mode energy accumulates as a positive regardless of the power flow direction active alarm an alarm that has been set up to trigger the execution of a task or notification when certain conditions are met An icon in the upper right corner of the meter indicates that an alarm is active A See also enabled alarm and disabled alarm baud rate specifies how fast data is transmitted across a network port block interval demand power demand calculation method for a block of time and includes three ways to apply calculating to that block of time using the sliding block fixed block or rolling
35. its Range Notes Heal Power Total 1022 Demand Present Apparent Power Total 1024 Demand Present Reactive Power Total 1026 Demand Present Real Power Total 1028 Demand Float Peak Apparent Power Total 1030 Demand Peak Reactive Power Total 1032 Demand Peak Current A Demand 1044 Current B Demand 2 Float N Amp Present Current C Demand pete fm fo m 1048 Current A Demand Float Y Amp Peak Current B Demand Y 1052 Current C Demand Peak Real Power Total 4014 Demand Present Apparent Power Total 4015 Demand Present Reactive Power Total 4016 Demand Present RO Real Power Total 4017 Demand Peak ES Ei Ei CEA CEA Apparent Power Total 4018 Demand Peak Reactive Power Total 4019 Demand Peak RO Read Only R W Read Write NV Nonvolatile 30 2008 Schneider Electric All Rights Reserved 63230 501 209A1 Power Meter 710 07 2008 Appendix B Register List Table B 3 Register Listing Demand Values continued Demand Values ae E 4008 Ment E Demang Integer Y Amp Scale 0 32767 Peak RO Read Only R W Read Write NV Nonvolatile Table B 4 Register Listing Min Max Values Min Max values ee EE Range Minimum Minimum Minimum Minimum Minimum inimum Minimum inimum Minimum Minimum Minimum Minimum Minimum Minimum Minimum Minimum Minimum RO Read Only R W Read Write NV Nonvolatile 2008 Sch
36. l sales representative Do not open the power meter Opening the power meter voids the warranty Get Technical Support Please refer to the Technical Support Contacts provided in the power meter shipping carton for a list of support phone numbers by country or go to www powerlogic com select your country gt tech support for phone numbers by country Troubleshooting The information in Table 5 1 describes potential problems and their possible causes It also describes checks you can perform or possible solutions for each After referring to this table if you cannot resolve the problem contact the your local Square D Schneider Electric sales representative for assistance A DANGER HAZARD OF ELECTRIC SHOCK EXPLOSION OR ARC FLASH Apply appropriate personal protective equipment PPE and follow safe electrical work practices See NFPA 70E This equipment must be installed and serviced only by qualified electrical personnel Turn off all power supplying this equipment before working on or inside Always use a properly rated voltage sensing device to confirm that all power is off Carefully inspect the work area for tools and objects that may have been left inside the equipment Use caution while removing or installing panels so that they do not extend into the energized bus avoid handling the panels which could cause personal injury Failure to follow this instruction will result in death or serious injury Table 5 1
37. l through available options e If you are entering more than one digit press to move to the next digit in the number e To save your changes and move to the next field press OK Menu items are displayed below the horizontal line at the bottom of the screen Figure 3 2 below shows the menu items of the first two levels of the power meter menu hierarchy Selecting a Level 1 menu item takes you to the next screen level containing the Level 2 menu items Some Level 2 items have Level 3 items The navigation buttons work consistently across all menu levels NOTE The is used to scroll through all menu items on a level Figure 3 2 Abbreviated IEC Mode Menu Items PHASE DMD PEAK c lt c lt U o O PQS PHASE DMD y zy ep PQS PE F THD V THD po THD Et ER METER E DMD MINMX MODE TIMER od 22 L METER DMD PASSW COM BARG aa ei U Voltage L L V Voltage L N The power meter can be configured to display either IEC or IEEE nomenclature Figure 3 2 shows IEC nomenclature NOTE Reset and Setup menu items require a password to navigate to the second level menu 2008 Schneider Electric All Rights Reserved 63230 501 209A1 07 2008 SETTING UP THE POWER METER Set Up Power Meter 2008 Schneider Electric All Rights Reserved Power Meter 710 Section 3 Operation The power meter ships with many default values already set up in the meter These values
38. lysis values 20 power factor min max conventions 16 power meter accessories 2 firmware 2 hardware 1 setup specifications 23 2008 Schneider Electric All Rights Reserved PT setup 8 11 R readings demand 16 real time readings 15 min max values 16 register list 25 resets of peak demand values 19 rolling block 17 S setup communications 11 CT8 11 demand current povver 9 password 10 PTs 8 11 sliding block 17 T thermal demand method 19 troubleshooting 21 instrument transformer wiring 37 Power Meter 710 Index 47 Schneider Electric Power Monitoring and Control 295 Tech Park Drive Suite 100 Lavergne TN 37086 Tel 1 615 287 3400 2195 Keating Cross Road Saanichton BC Canada V8M 2A5 Tel 1 250 652 7100 Electropole 38 EQI PowerLogic is a trademark or registered trademark of Schneider Electric in the USA 31 rue Pierre Mendes France France and other countries Doe renong CROSS Electrical equipment should be installed operated serviced and maintained only by Tel 33 0 4 76 57 60 60 hoe PESE qualified personnel No responsibility is assumed by Schneider Electric for any Getting technical support consequences arising out of the use of this material Contact your local Schneider Electric sales representative for assistance or go to the 63230 501 209A1 07 2008 www powerlogic com website All Rights Reserved
39. neider Electric All Rights Reserved 31 Power Meter 710 63230 501 209A1 Appendix B Register List 07 2008 Table B 4 Register Listing Min Max Values continued Min Max values Minimum Minimum Minimum Minimum Minimum Minimum Maximum Maximum Maximum Maximum Maximum Maximum Maximum aximum Maximum Maximum Maximum Masino Mandat E Maximum Maximum Maximum Maximum RO Read Only R W Read Write NV Nonvolatile 32 2008 Schneider Electric All Rights Reserved 63230 501 209A1 Power Meter 710 07 2008 Appendix B Register List Table B 4 Register Listing Min Max Values continued Min Max values Reg Name Size Type Access NV Scale Units Range Notes Maximum aximum Maximum aximum Maximum inimum Minimum inimum Minimum inimum Minimum inimum Minimum Minimum Minimum Minimum Minimum Minimum Minimum inimum Minimum inimum Minimum inimum RO Read Only R W Read Write NV Nonvolatile 2008 Schneider Electric All Rights Reserved 33 Power Meter 710 63230 501 209A1 Appendix B Register List 07 2008 Table B 4 Register Listing Min Max Values continued Min Max values Minimum inimum Minimum inimum Maximum Maximum Maximum aos OWeT racion Lota Integer ESRAC 0 0001 0 10000 _ Absolute Maximum Maximum aximum Maximum aximum Maximum Maximum Maximum Maximum Maximum este Maximum Maximum Maximum Minnie ian Maximum RO Re
40. ntervals for a 15 minute interval The meter will calculate the subinterval period to be 7 5 minutes or 450 seconds Demand is updated at each subinterval password is visible 07 2008 2008 Schneider Electric All Rights Reserved 63230 501 209A1 07 2008 Set Up Communications Set Up Bar Graph Scale 1 In SETUP mode press until COM is visible 2 Press COM 3 Enter the ADDR meter address 1 to 247 4 Press OK 5 Select the BAUD baud rate 2400 4800 9600 or 19200 6 Press OK 7 Select the parity EVEN ODD or NONE 8 Press OK to return to the SETUP MODE screen NOTE Default values are displayed 1 In SETUP mode press until BARG is visible 2 Press BARG 3 Enter the CT percent of CT primary to represent 100 on the bar graph 4 Press OK to return to the SETUP MODE screen Set Up Meter s Visualization Mode The meter s Visualization Mode is set up using the RESET menu Follow the Power Meter Setup instructions but select RESET instead of SETUP The meter mode is only a visualization mode It does not change or affect the way the PM710 performs its calculations 1 In RESET mode press until MODE is visible 2 Press MODE 3 Select IEEE or IEC by pressing the corresponding button below the selection A small triangle is displayed below the current selection 4 Press to return to the RESET MODE screen 2008 Schneider Electric All Right
41. ockwise A phase wire on C phase terminal B phase wire on A phase terminal C phase wire on B phase terminal All three CT lead connections rotated clockwise A phase wire on B phase terminal B phase wire on C phase terminal C phase wire on A phase terminal Possible Causes All three PT lead connections rotated clockwise A phase wire on B phase terminal B phase wire on C phase terminal C phase wire on A phase terminal All three CT lead connections rotated counterclockwise A phase wire on C phase terminal B phase wire on A phase terminal C phase wire on B phase terminal 41 Power Meter 710 63230 501 209A1 Appendix C Instrument Transformer Wiring Troubleshooting Guide 07 2008 FIELD EXAMPLE 42 Readings from a 4 wire system kW 25 kVAR 15 kVA 27 I 904A Ig 910A Ic 931A Lgave 908A Vag 495V Vac 491V Ve 47 491V Van 287V Ven 287V Von 284V PF4g4 0 75 lag to 0 22 lead fluctuating Troubleshooting Diagnosis Power factors cannot be correct None of the Section II symptoms exist so proceed to the 4 wire troubleshooting Section IV Cannot calculate kW because 3 phase power factor cannot be right so calculate kVA instead Calculated kVA 4 3X Vi x I3 avg 1000 1 732 x 495 x 908 100C 778 kVA Power meter reading is essentially zero compared to this value 4 wire Case E looks similar Since the PTs were connected to other power meters which were read
42. rage of 3 phases L L and L N 45 to 65 Hz Total and per phase absolute Total and per phase absolute Total and per phase Total absolute 0 000 to 1 0 to 1 84 x 10 Wh absolute 0 to 1 84 x 1010 VARh absolute 0 to 1 84 x 10 VAh Up to 32 767 hours and 59 minutes Per phase Thermal Total sliding block rolling block or block Phase Total Total Total Current and voltage L L and L N Reset password protected Maximum demand current and power Energy values and operating time Minimum and maximum values Operational time Visualization Modes password protected Display All calculations are the same under both IEC and IEEE visualization modes Minimum and Maximum Values unsigned Total real power absolute Total apparent power Total reactive power absolute Total power factor absolute Current per phase Voltage L L and L N THD current per phase THD voltage L L and L N Absolute values Both power and energy in and out of the load are treated as additive 2008 Schneider Electric All Rights Reserved 15 Power Meter 710 Section 4 Metering MODBUS RS485 MIN MAX VALUES FOR REAL TIME READINGS POWER FACTOR MIN MAX CONVENTIONS DEMAND READINGS 16 63230 501 209A1 07 2008 Table 4 1 Power Meter Characteristics continued Local or Remote Setup Type of distribution system 3 phase 3 or 4 wire with 1 2 or 3 CTs two or single phase Primary 1 to
43. rgy PM Power meter PQS Real reactive apparent power PQSd Real reactive apparent power demand PRIM Primary PT Number of voltage connections see potential transformer on page 44 45 Power Meter 710 Glossary 46 63230 501 209A1 07 2008 PWR Power Q Reactive power Qd Reactive power demand Qh Reactive energy R S Firmware reset system version S Apparent power S N Power meter serial number SCALE see scale factor on page 44 Sd Apparent power demand SECON Secondary SEC Secondary Sh Apparent Energy SUB I Subinterval THD Total Harmonic Distortion U Voltage line to line V Voltage VAR volt ampere reactive VMAX Maximum voltage VMIN Minimum voltage 2008 Schneider Electric All Rights Reserved 63230 501 209A1 07 2008 INDEX B block interval demand method 17 C communications functions 16 setup 11 CT setup 8 11 D default password 7 demand current 19 thermal 19 demand current calculation 19 demand power calculation 17 demand readings 16 demand current 19 diagnostics password 10 display menu overview 6 operating 5 E energy password 10 energy readings 19 F firmware 2 fixed block 17 menu 6 metered values demand readings 16 energy readings 19 real time readings 15 minimum maximum password 10 P passvvord default diagnostics 10 energy 10 minimum maximum 10 setup 10 peak demand calculation 19 power ana
44. s Reserved Power Meter 710 Section 3 Operation COM SETUP I ct ma r f MIM PAR MILS OK JHRBRHPH SCALE PowerLogc SELECT MOIE Selected Small Triangle 11 Power Meter 710 63230 501 209A1 Section 3 Operation 07 2008 RESETTING THE POWER METER Meter values can be re initialized using the Reset function The following values are affected by this Reset e Operation Timer e Energy Accumulators e Min Max Values Demand Values Initialize the Meter To re initialize the power meter complete the following steps 1 From the SUMMARY screen press RESET INIT METER 2 Enter the RESET password 00000 is the default 3 Press OK 4 Press METER 5 Press NO or YES 6 Press to return to the RESET screen Reset Individual Values Individual values for Energy Demand Min Max and Timer can be reset without affecting other values Below are instructions for resetting Energy values Reset Energy Values 1 From the SUMMARY screen press RESET ENERGY 2 Enter the RESET password 00000 is the default eof A KE 3 Press OK 4 Press E c9 KV AR 5 Press NO or YES AT wa 6 Press to return to the RESET screen NOTE Individual settings for Demand Min Max Mode and Timer can be reset by selecting the ug value and using the above procedure 12 2008 Schneider Electric All Rights Reserved 63230 501 209A1 07 2008 VIEWING METER INFORMATION 1 Press b until DIAGN
45. tion IV 4 Wire System Troubleshooting as is appropriate Because it is nearly impossible to address all combinations of multiple wiring mistakes or other problems that can occur e g blown PT fuses missing PT neutral ground connection etc this guide generally addresses only one wiring problem at a time Before trying to troubleshoot wiring problems it is imperative that all instantaneous readings be available for reference Specifically those readings should include the following e line to line voltages e line to neutral voltages e phase currents e power factor e kW e kVAR e kVA Most power systems have a lagging inductive power factor The only time a leading power factor is expected is if power factor correction capacitors are switched in or over excited synchronous motors with enough capacitive KVARS on line to overcorrect the power factor to leading Some uninterruptable power supplies UPS also produce a leading power factor Normal lagging power system readings are as follows e KW 43x VagX Ioavg X PF3 avg 1000 e KVAR RVA KW 37 Power Meter 710 63230 501 209A1 Appendix C Instrument Transformer Wiring Troubleshooting Guide 07 2008 SECTION Il COMMON PROBLEMS FOR 3 WIRE AND 4 WIRE SYSTEMS Table C 1 Section Il Case A Symptoms 3 Wire and 4 Wire Zero amps Zero kW kVAR kVA Table C 2 Section ll Case B Symptoms 3 Wire and 4 Wire Negative kW of expected ma
46. wer factor see power factor true power factor see power factor unsigned integer an unsigned 16 bit integer unsigned long integer an unsigned 32 bit value returned by a register The upper 16 bits are in the lowest numbered register pair For example in the register pair 4010 and 4011 4010 contains the upper 16 bits while 4011 contains the lower 16 bits 2008 Schneider Electric All Rights Reserved 63230 501 209A1 07 2008 ABBREVIATIONS 2008 Schneider Electric All Rights Reserved Power Meter 710 Glossary A Ampere ADDR Power meter address AMPS Amperes BARGR Bargraph COMMS Communications CPT Control Power Transformer CT see current transformer on page 43 DMD Demand DOM Date of Manufacturing F Frequency HZ Hertz I Current IMAX Current maximum demand kVA Kilovolt Ampere kVAD Kilovolt Ampere demand kVAR Kilovolt Ampere reactive kVARD Kilovolt Ampere reactive demand kVARH Kilovolt Ampere reactive hour kW Kilowatt kWD Kilowatt demand kWH Kilowatthours kWH P Kilowatthours per pulse kWMAX Kilowatt maximum demand MAINT Maintenance screen MBUS MODBUS MIN Minimum MINMX Minimum and maximum values MSEC Milliseconds MVAh Megavolt ampere hour MVARh Megavolt ampere reactive hour MWh Megawatt hour O S Operating System firmware version P Real power PAR Parity PASSW Password Pd Real power demand PF Power factor Ph Real ene
47. y transformer though this is not likely 2008 Schneider Electric All Rights Reserved 63230 501 209A1 Power Meter 710 07 2008 Appendix C Instrument Transformer Wiring Troubleshooting Guide SECTION Ill 3 WIRE SYSTEM TROUBLESHOOTING Table C 4 Section Ill Case A Symptoms 3 Wire Possible Causes Currents and voltages approximately balanced CT secondary leads are swapped A phase lead on C phase terminal and kW near 0 vice versa RVAR near 0 PT secondary leads are swapped A phase lead on C phase terminal and vice versa PF can be any value probably fluctuating Table C 5 Section IlI Case B Symptoms 3 Wire Possible Causes Phase B current is 4 3 higher than A and C except in System Type 31 kVA about half of the expected magnitude One CT polarity is backwards kW and kVAR can be positive or negative less than about half of the expected magnitude PF can be any value probably a low leading value Table C 6 Section Ill Case C Symptoms 3 Wire Possible Causes Ven is N3 higher than V p and Vgc KVA about half of the expected magnitude kW and kVAR can be positive or negative less than about One PT polarity is backwards half of the expected magnitude PF can be any value probably a low leading value Table C 7 Section IlI Case D Symptoms 3 Wire Possible Causes kW 0 or low with magnitude less than RVAR Either the two voltage leads are swapped OR the two current l
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