DTI3-KF-EP angol fordítása
Contents
1. 2 5 11 Self check function The correct operation of the program system is supervised by a Watch dog circuit Additionally the program includes cyclic test routines as well This self check system supervises all internal errors of the device and if an output circuit test module is configured the trip circuits are checked as well 2 5 11 1 Internal error check The internal error check supervises the healthy state of the parameter memory the power supply of the event memory battery supported RAM correct operation of the A D converter In case of any detected problems the UKE input of the tripping matrix is set to logic 1 The same input gets 1 if the CB circuit test detects any error too 2 5 11 2 Trip circuit check If an output circuit test module is configured in the device and the check is enabled then the continuous CB circuit test is carried out The principle and the operation of this test are described in EPCP 2004 documentation Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 47 53 DTI3 KF EP PROTECTA ae Electronics Co Ltd User s guide 3 Communication with the device 3 1 The LCD menu system The integrated menu system is described in EPCP 2004 documentation The initial state of the LCD displays the type of the device the date and the current time day month hours minutes2. Electronics Co Ltd User s guide 2 1 3 Tests of the overcurrent protection For testing it is advisable to disable the other protection functions and the overcurrent protection stages must be enabled using PROTLOG equations similar examples see in Fig 2 2 Before testing check parameter setting especially the marshalling of the status signals to the relay outputs The tests can be performed using a single phase current or with a three phase test set as well The function measures and displays the basic harmonic value of the measured currents The measured values can be seen on the integrated LCD in the Test menu item or they can be seen on the On line screen of the connected PC using the Protect for Windows software The algorithm operates with the RMS value of the basic harmonic current component If the shape of the current is not sinusoid there can be considerable measured differences between the measured values of an independent measuring instrument and the displayed values It is advised to use a test set generating pure sinusoid test currents If the current setting is below the continuous overload capability of the input current transformers the tests can be performed using slowly increasing currents In case of higher current dynamic test method must be applied The test current must be switched on the input and check no operation at 95 setting values and no operation at 105 setting To check
3. PROTLOG logic equations As an example the enabling of the high current setting stage can be LI ici Remaining resources 70 4 Previous 7 Always or _ I gt gt Enabled Next Help Fig 2 2 Enabling the functions with PROTLOG logic equation 2 1 1 3 Outputs of the function The functions deliver status signals indicating the operation Among others these will be the inputs rows of the software matrix These inputs can be marshalled with matrix programming to the outputs columns of the matrix The status signals of the functions can be inputs of the PROTLOG logic equations as well The matrix rows of the phase overcurrent protection function are Matrix row Explanation DSE SAKE aes Starting of the high current setting stage in any of the phases Mx ee Starting of the low current setting stage in any of the phases Mx rsti gt gt lt Time over in the high current setting stage trip command Mx Tee lb Time over in the low current setting stage trip command These signals can be marshalled with the software matrix to the output relays of the device Fig 2 3 below shows that output relay contact No 1 outputs the trip command Starting of the high current setting stage is signalled with contact No 2 and contact No 3 signals starting of the high current setting stage Parameters Compiled by Approved by Date Page Kor
4. overcurrent protection function Io gt Fnabled Enabling signal for the low current setting zero sequence overcurrent protection function POTONE ENG Enabling signal for the directionality of low current setting zero sequence overcurrent protection function k_U lt gt Enabled Enabling signal for the phase over undervoltage function E_Uo gt Enabled Enabling signal for the zero sequence overvoltage function Acknowledgement Acknowledgement t CBcirc error start Time delay for CB circuit error signal Trip command Triggering signal for the event recorder Dist rec level evel triggering for the disturbance recorder trig Dist rec edge Edge triggering for the disturbance recorder Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 36 53 DTI3 KF EP PROTECTA ae Electronics Co Ltd User s guide trig 2 5 2 3 Programming the PROTLOG eguations The PROTLOG equations can be programmed with the connected PC only using Protect for Windows software The method of programming is a graphical method described in EPCU 2004 documentation The man machine interface of the device does not support PROTLOG programming 2 5 3 Application of signals from the digital inputs Depending on the hardware configuration the device provides 0 8 16 24 32 digital i
5. seconds DTI MV EP 21 08 16 56 12 When pressing the ENT pushbutton the menu system opens Events Test Chk Param 3 1 1 The Events menu When selecting the Events menu the LCD shows the last stored event Button d steps to a previous event button T steps back The list of the possible events in this device is as follows Event message Explanation I gt gt R start High current setting stage start in phase R I gt gt S start High current setting stage start in phase S hey start t High current setting stage start in phase T I gt R start Low current setting stage start in phase R 125 start Low current setting stage start in phase S Tet start Low current setting stage start in phase T Io gt gt start High current setting zero sequence stage start 102 start Low current setting zero sequence stage start I gt t timeout Phase fault low current setting stage timeout I gt gt t timeout Phase fault high current setting stage timeout To gt t timeout Zero sequence low current setting stage timeout voe rE EaMeOUr Zerg sequence fault high current setting stage timeout 3Uo gt start Zero sequence overvoltage stage start 3Uo gt t timeout Zero sequence overvoltage stage timeout Urs lt gt start Over undervolatge stage start in phases RS Ust lt gt start Over undervolatge stage start in phases ST ULES start Over u
6. Parameters Fig 2 20 Parameter setting 5 In order to save memory for longer records the integrated disturbance recorder function records the status of outputs No 1 4 only 2 5 4 1 Setting guide The parameters to be set are described in chaptei2 5 4 The following guide refers to these parameter by the Parameter name K i for SCADA If a relay output is assigned to the supervisory and control functions i e setting is then the protection functions can not influence the status of these relays even if they are programmed by PROTLOG equations Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 39 53 DTI3 KF EP PROTECTA Electronics Co Ltd User s guide 2 5 5 Circuit breaker control function A dedicated window of Protect for Windows software is prepared to initiate switching commands to the circuit breaker This window is displayed on the PC screen according to Fig 2 21 a Command Command Fig 2 21 Window for CB control Both switching commands start a 300 ms timer During runtime of these timers the input variables CB ON and CB oFF of the tripping matrix are in 1 logic state These can be directed to any contacts of No 1 8 or to the free programmable timers The duration of the control command is the running time of the timer 2 5 6 The disturbance recorder fu
7. current setting stage phase T overcurrent protection It gt gt Start of high current setting stage phase T overcurrent protection Io gt Start of low current setting stage zero sequence overcurrent protection los Start of high current setting stage Zero seguence overcurrent protection DTI2 status 2 Uo gt Start of the zero seguence overvoltage function EEPROM error EEPROM error BATT error RAM battery discharged AD error A D converter error 5 No meaning 6 No meaning 7 No meaning 8 No meaning In case of optional voltage input module the calculated values Value Explanation P kW Three phase active power Q kvar Three phase reactive power Cos fi Power factor Po kW Zero sequence active power Qo kvar Zero sequence reactive power Cos fio Zero sequence power factor As an option if the current input module is supplied by a measuring CT the following values can be calculated as well Value Explanation Power consumption kWh Active energy consumption Reactive power kvarh Reactive energy consumption Power access Power excess Overload Overload Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 46 53 DTI3 KF EP PROTECTA Electronics Co Ltd User s guide At the moment of event recording the measured analogue values are logged as well
8. given in ms The time delay must be co ordinated to the other protection setting on the network The time delay is defined as an additional time delay id does not include the calculation time of the algorithm PTIn Time delay for the low current setting stage definite time The parameter is given in ms The time delay must be co ordinated to the other protection setting on the network The time delay is defined as an additional time delay id does not include the calculation time of the algorithm E InnEng The function must be enabled using PROTLOG equation similar example see in Fig 2 2 The high current setting stage must be enabled individually E Inkng The function must be enabled using RPROTLOG equation similar example see in Fig 2 2 The low current setting stage must be enabled individually PMxsInntOnt PMxsIntOnt Setting for latching of the high and low current setting stages individually If latching is set then the on state is kept even if the current drops below the setting level Resetting is possible with acknowledgement only if the current drops below the setting value Acknowledgement must be programmed with PROTLOG equation as indicated in Fig 2 22 See below Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 14 53 DTI3 KF EP PROTECTA ae
9. of DTI MV EP devices The information related wit the design of the devices is described EPCP 2004 documentation The arrangement of the modules the connections is specific to the ordered device All these information is supplied as an attachment of the delivered device Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 52 53 DTI3 KF EP PROTECTA Electronics Co Ltd User s guide 6 Ordering data The ordering of the device is simple by completing the ordering formula which is to be attached to the ordering This formula contains the following information Type of the EuroProt multifunctional device with DTI MV EP factory configuration Rated power supply voltage Rated current 1 A 5 A Zero sequence rated current 1 A 5 A 100 mA 500 mA Breaking capacity of the output contacts 2 A 4 A Type of zero sequence current transformer Design version of the device SCADA options Other options Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 53 53
10. of the device offers possibility to programming as well a Programming of the tripping matrix using Protect for Windows software s Parameters window The assignment of the inputs and outputs of the tripping matrix is easy the intersection of the appropriate row and column must be marked with a character Fig 2 18 shows the initial state of the matrix with no assignments 2 8 Parameters Fig 2 18 The tripping matrix Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 34 53 DTI3 KF EP PROTECTA Electronics Co Ltd User s guide b Programming of the tripping matrix using the man machine interface of the device If the parameters are to be set using the man machine interface of the device then the parameters of the matrix rows are to be calculated as the hexadecimal sum of the selected outputs of the matrix The hexadecimal code values of the columns are as follows Matrix column Hexadecimal code K1 output relay 2 1h K2 output relay 2 2h K3 output relay 2 4h K4 output relay 2 8h K5 output relay 2 10h K6 output relay 25 20h K7 output relay 2 40h K8 output relay X 80h T1 timer start 2 100h T2 timer start 2 200b 2 5 2 The PROTLOG equations The available digital status signals are the input possibilities of the PROTLOG equation system w
11. on Fig 2 22 See below 2 2 3 Checking the earth fault overcurrent protection For checking this function all other functions are advised to be disabled When checking the low current setting zero sequence protection take the fact into consideration that there are other special conditions to be fulfilled as well the zero sequence current is measured in the dedicated current input the phase overcurrent protection function may not operate and if the directionality is enabled then the zero sequence overvoltage function must operate as well in order to avoid wrong operation because of too low voltage value so this function must be enabled as wee and the angle between the voltage and current must be between the limits as well The high current setting stage must be enabled and the zero sequence current is calculated as the sum of the three phase currents For both stages the trip signals of the functions must be marshalled to the appropriate relay output s using the software matrix The protection function measures and displays the basic harmonic of the zero sequence current This value can be seen in the integrated LCD using the Test menu item or on the On line screen of the connected PC using the Protect for Windows software The algorithm operates with the RMS value of the basic harmonic current component If the shape of the current is not sinusoid there can be considerable measured differences between the
12. panel of the device Pips Remaining resources 68 Previous Input8 Acknowledgement s ra Help Fig 2 22 Definition of the acknowledgement with a PROTLOG equation example Parameter setting for latching of the LED s PLEDlatch LED latching LED latching yes The setting on the On line PC screen of the Protect for Windows software Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 43 53 DTI3 KF EP PROTECTA A Electronics Co Ltd User s guide Parameters Fig 2 23 Parameter setting 6 2 5 8 1 Setting guide The parameter to be set is described in chapter This guide refers to the parameter by the Parameter name PLEDlatch If the latching of the LED s are set the parameter is 47 the possibility for acknowledgement is needed as well Fig 2 22 shows an example 2 5 9 Displayed system messages If any of the protection functions operates or the self check system detects an error then a message is displayed on the Front panel LCD The following table lists the possible system message text elements EEPROM error RAM battery discharged Self CHK A D error NO since last request Protection trip DTI KF EP IRT 2003 07 11 V1 01 CB circuit error The message must be acknowledged by pressing the ENT ENTER pushbutton The effec
13. setting stage in phase S It gt gt start Starting of the high current setting stage in phase T I gt gt t timeout Trip command of the high current setting stage time over I gt enabled Low current setting stage enabled Ir start Starting of the low current setting stage in phase R Tsz Start Starting of the low current setting stage in phase S It gt start Starting of the low current setting stage in phase T I gt t timeout Trip command of the low current setting stage time over The On line screen of the Protect for Windows program shows this information as indicated in Fig 2 4 Information related to other protection functions are masked in the Figure On line information Ir ind Is ind It gt ind I gt t Ki Fig 2 4 On line data 1 Currents are indicated in primary Amperes In case of overcurrent stages character signals staring of the function and the generation of the trip command 2 1 1 6 Messages of the function There is only one message related to the function Trip command To enable this message a PROTLOG logic equation must be composed for the Trip command logic variable Fig 2 5 sows an example Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 10 53 DTI3 KF EP PROTECTA ae Electronics Co Ltd User s guide MIE Remaining reso
14. timers names and scales for the individual channels etc The record of this disturbance recorder module can be analysed wit an external PC The optional inputs of the device can be used for any signals Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 41 53 DTI3 KF EP PROTECTA Electronics Co Ltd User s guide 2 5 7 The free programmable timers The program of the device provides two free programmable timers The time delay of these timers can be set with parameters the starting condition can be programmed in the tripping matrix In case of time over the timers send signals to the dedicated inputs of the tripping matrix which can be marshalled to a relay output and they are inputs for the PROTLOG equations as well 2 5 7 1 The parameter setting t MXO 1 tart 60000 10 Timer with 10 ms accuracy ms t MXO 2 tart Timer with 1 s accuracy S 2 5 7 2 Inputs of the timers The timer starting is to be programmed in the tripping matrix by marking with character the appropriate T1 or T2 column elements in case of multiple marking the OR connection is valid 2 5 7 3 Outputs of the timers The timers send status signals concerning the operation these can be programmed in the tripping matrix to the output relays or they can be processed with PROTLOG equations The matrix rows Matr
15. 6 53 DTI3 KF EP PROTECTA A Electronics Co Ltd User s guide 2 1 1 2 The parameter setting The function needs setting of the following parameters Name LCD in IMax Step Meaning PIn I gt In CTprot 20 2500 5 Setting of the low current HI Lhd setting stage related to the CT rated current PInn aa In CTprot 20 2500 5 Setting of the high current aa ne TT setting stage related to the CT rated current PAV CTprN CTprot 15000 CT primary rated current Pein Ez secondary value low current setting stage pope high current setting stage setting with Enabling of the low current PROTLOG equation only setting stage E_InnEng k a t a Wirk Q 1 1 Enabling of the high current eae only setting stage pentane oe 7 j Latching of the matrix row jacys a for the high current setting stage time over PMxsTntOnt I gt t latching Latching of the matrix row yes for the low current setting stage time over Parameter setting of the function on the On line PC screen of the Protect for Windows software Pies Fig 2 1 Parameter setting 1 Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 7 53 DTI3 KF EP PROTECTA ae Electronics Co Ltd User s guide The enabling of the functions is solved with
16. ER Gre OK Status signal of the trip circuit supervision unit see EPCP 2004 2 CB OLEG ORK Status signal of the trip circuit supervision unit see EPCP 2004 JCB GLEC OK Status signal of the trip circuit supervision unit see EPCP 2004 T EBTOLYE OR Status signal of the trip circuit supervision unit see EPCP 2004 SW1 SW1 switch on the front panel is pressed SW2 SW2 switch on the front panel is pressed eee ech Sora Start of the analogue event recorder U lt gt start Start of the over undervoltage function U lt gt t timeout Time over of the over undervoltage function Uo gt start Start of the zero sequence overvoltage function Uo gt t timeout Time over of the zero sequence overvoltage function CHK5 6 7 8 Status signal of the supervision unit see EPCP 2004 The inputs on the PC screen marked with character are latched status signals 2 5 2 2 Outputs of the logic equations Output Explanation Matrix equation 1 6 Outputs of the 1 6 PROTLOG equations which are matrix row elements KI BEG Status signals directed to relay outputs K9 K16 lew enabled Enabling signal for the high current setting phase overcurrent protection function I gt Enabled Enabling signal for the low current setting phase overcurrent protection function Io gt gt Enabled Enabling signal for the high current setting zero sequence
17. PROTEC A EuroProt complex protection TEO ANIFA 91 O EZ SNT i J lt MA j i L f L 4 E eg E yrs A Y 4 l YW 7 rN JULS IL Sl cy H f l A LAA IE VILL p J Ef L factory configuration ID No EH 13 13608 01 Budapest 2004 DTI3 KF EP PROTECTA ae Electronics Co Ltd User s guide CONTENTS Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 2 53 DTI3 KF EP PROTECTA ae Electronics Co Ltd User s guide 1 Application The members of the EuroProt complex protection series are basically modular devices The modules are assembled and configured according to the required protection functions This manual describes the specialities of one of the numerous applications the DTI MV EP factory configuration and its versions The general user s manual for the EuroProt devices is the document EPCP 2004 EuroProt complex protection hardware and software manual further EPCP 200 which provides all common information to the members of the EuroProt complex protection series The DTI MV EP complex numerical device made by PROTECTA Co Ltd is pre configured for a three phase definite time overcurrent protection with earth fault protection This device can be applied in all areas of the electric power system where overcurrent protection is needed to protect against short
18. The operation of the functions integrated into the device is indicated by seven LED s located on the front panel The LED s shown in the following table are related to the zero sequence overcurrent protection LEDs are numbered from top to bottom LED No LED text Explanation 8 3Io gt Zero sequence overcurrent protection operated 2 2 1 11 Signals recorded in the disturbance recorder This function generates the following information for the integrated disturbance recorder Analogue signals Explanation Measured zero sequence current as percent of the CT rated current Digital signals ros Sangre ow aren sein seee anna Low current setting stage time over trip command C Starting of the zero sequence overvoltage function Uo gt Zero sequence overvoltage function time over trip command 2 2 2 Setting guide for the zero sequence overcurrent function The parameters to be set are described in chapter 2 2 1 2 The following guide refers to the parameters by the Parameter name Pion Setting value of the low current setting stage related to the CT rated current The value is expressed in percent Pionn Setting value of the high current setting stage related to the CT rated current The value is expressed in percent PAVo The primary rated current of the dedicated zero sequence CT This setting is not used by the protection function for pro
19. age protection for phase voltages These functions are independent of each other they can be set individually The functions can be individually set to be operative or inoperative The following chapters describe the protection functions 2 1 Definite time overcurrent protection for phase faults One of the basic functions of the complex protection is the definite time overcurrent protection for phase faults The algorithm determines the basic harmonic component of the phase currents using Fourier method and this value is compared with the settings If the basic harmonic content of one phase current is above the setting the function starts the timer When the pre set time is over the function generates trip command 2 1 1 Realisation of the three phase two stage overcurrent protection The DTI3 MV EP factory configuration of the EuroProt devices implements a three phase two stage definite time overcurrent protection The measurement is performed in all three phases independently of each other and the comparison with the two setting values high current setting low current setting is performed individually as well The measurement of the elapsed time however is common for all phases and the trip command is issued common for the three phases as well 2 1 1 1 Analogue inputs of the function This function measures the three phase currents Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004
20. and control system and as an option if the device contains a large graphic display they are shown here as well The measured values as default Value Explanation Ir A R phase current base harmonic Is lel S phase current base harmonic TE AlS T phase current base harmonic ItO Fel S Zero sequence current base harmonic In case of optional voltage input module Value Explanation Urs TRV RS line to line voltage base harmonic Ust kV ST line to line voltage base harmonic Utr PRM TR line to line voltage base harmonic 3Uo kV Zero sequence voltage base harmonic The status signals of the individual protection functions are summarised for the LCD as follows the sequence means bits from right to left in the displayed status words Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 45 53 DTI3 KF EP PROTECTA Electronics Co Ltd User s guide Status word Signal Explanation DTI2 status_l Irs Start of low current setting stage phase R overcurrent protection Ir gt gt Start of high current setting stage phase R overcurrent protection Is gt Start of low current setting stage phase S overcurrent protection Is gt gt Start of high current setting stage phase S overcurrent protection It gt Start of low
21. art of zero sequence overvoltage protection Ver Ped Trip command of zero sequence overvoltage protection time over ee Start of over undervoltage protection X Ulli Trip command of over undervoltage protection KENE Overs Time over of Ist free programmable timer x Timer 2 over Time over of 2nd free programmable timer ener ee Self check no errors detected x Equation d Output of free programmable 1st logic equation x Equation 2 Output of free programmable 2nd logic equation x Equation 3 Output of free programmable 3rd logic equation x Equation 4 Output of free programmable 4th logic equation x Equation 5 Output of free programmable 5th logic equation x Equation 6 Output of free programmable 6th logic equation x CB OFF CB ON control command from the Control window x CB ON CB OFF control command from the Control window Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 33 53 DTI3 KF EP PROTECTA A Electronics Co Ltd User s guide 2 5 1 2 The outputs of the matrix The matrix columns are the possible outputs of the matrix They include the first 8 relay outputs and the starting inputs of the two free programmable timers 2 5 1 3 Programming the tripping matrix The programming is very convenient with an external PC using Protect for Windows software see EPCP 2004 documentation but the man machine interface
22. circuits overload or earth fault The additional supervisory and control functions SCADA extend the device to a complex field unit 1 1 Features The main features of DTI MV EP complex protection are as follows The protection part of the complex device implements the following functions three phase definite time overcurrent protection high current setting stage I gt gt three phase definite time overcurrent protection low current setting stage I gt zero sequence overcurrent function high current setting stage 31055 zero sequence overcurrent function low current setting stage 31055 can be set for directional earth fault protection as well zero sequence overvoltage protection over undervoltage protection based on the phase voltages Features of the protection functions all functions can be individually switched to be operative or inoperative the setting value and time delay of the functions can be set independently of each other the zero sequence low current setting stage can be set for directional earth fault protection as well Additional features trip matrix PROTLOG equations The features of the supervisory and control functions implemented in the device are as follows the supervisory and control functions are implemented in a dedicated processor located on the Central Processing Unit CPU of the device the optional large graphic LCD realises fu
23. e Korn l Petri Dr L szl Eperjesi 11 04 2004 32 53 DTI3 KF EP PROTECTA ae Electronics Co Ltd User s guide 2 5 Additional implemented functions 2 5 1 Integrated tripping matrix The software matrix marshals the generated signals of the protection functions or the results of the PROTLOG equations to the output relays of the device or to the starting inputs of the free programmable timers The inputs are the matrix rows the output possibilities are the matrix columns 2 5 1 1 The inputs of the matrix The inputs of the matrix are the activating protection functions they are arranged to the rows of the matrix Matrix row Explanation ee G SENe5 E Start of high current setting phase overcurrent protection ZTS A Start of low current setting phase overcurrent protection X BTO Start of high current setting zero sequence overcurrent protection X g T02 Start of low current setting zero sequence overcurrent protection X Irs Zee le Trip command of high current setting phase overcurrent protection a Ed Trip command of low current setting phase overcurrent protection SO a S Trip command of high current setting zero sequence overcurrent protection time over Beale Trip command of low current setting zero sequence overcurrent protection time over aie St
24. e delay Zero sequence overvoltage stage time delay Enabling of the low current setting stage Enabling of the high current setting stage Enabling of the directionality Enabling of the zero sequence overvoltage stage Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 18 53 DTI3 KF EP PROTECYA A Electronics Co Ltd User s guide PMxsIonnt Io gt gt t latching Latching of matrix row for Ont yes high current setting stage time over PMxsIont0O lo gt t latching i Latching of matrix row for low nt t yes f current setting stage time over 2 Settings of the function on the On line PC screen Parameters Parameters Fig 2 9 Parameter setting 2 2 2 1 3 Outputs of the protection function The functions deliver status signals indicating the operation Among others these will be the inputs rows of the software matrix These inputs can be marshalled with matrix programming to the outputs columns of the matrix The status signals of the functions can be inputs of the PROTLOG logic equations as well The matrix rows of the zero sequence overcurrent protection function are Matrix row Explanation Mx Siar Starting of the high current setting stage Mx 3707 Starting of the low c
25. er undervoltage function is the enabled state as defined by PROTLOG equation The trip signal must be marshalled with matrix programming to the appropriate output relay The protection function measures and displays the calculated base harmonic values of the line to line voltages These values can be red on the integrated LCD on the front panel of the device using the Test menu item This information is shown on the On line screen of the PC as well using the Protect for Windows software The algorithm operates with the RMS value of the basic harmonic voltage component If the shape of the voltage is not sinusoid there can be considerable measured differences between the measured values of an independent measuring instrument and the displayed values It is advised to use a test set generating pure sinusoid test voltages If the current setting is below the continuous overload capability of the input voltage transformers the tests can be performed using slowly increasing or decreasing voltages In case of higher voltage dynamic test method must be applied The test voltage must rapidly increase and check no operation at 95 setting value and operation at 105 setting To check the time delay it must be considered that the time setting is an additional time delay it does not include the operation time of the measuring algorithm Use at least 20 higher or lower value than the setting for the tests Compiled by Approved by Date Pag
26. erning the communication The setting of the parameters for the communication is common for all EuroProt devices See EPCP 200 documentation Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 50 53 DTI3 KF EP PROTECTA Electronics Co Ltd User s guide 3 1 3 2 Password The password protection is common for all EuroProt devices See EPCP 2004 documentation 3 2 Connection to an external PC When connecting the device via serial line to an external PC the man machine conversation is more convenient as the operation using local man machine interface of the device The operating program is Protect for Windows this software is delivered with the device and the upgrading can be downloaded from the Protecta homepage free of charge The details of operation with this software see in EPCP 2004 documentation Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 51 53 DTI3 KF EP PROTECTA Electronics Co Ltd User s guide 4 The local SCADA function The CPU module of the device includes a dedicated microcontroller to perform special SCADA functions This can be supported by a large optional graphic display on the front panel of the device This function is common for all EuroProt devices See EPCP 2004 documentation 5 Design
27. follows the VT angle error is subtracted from the CT angle error and the compensating angle setting is the negative value of the subtraction PTIonn Time delay for the high current setting stage PTIon Time delay for the low current setting stage PTUon Time delay for the zero sequence overvoltage function E TonEng E TonnEng E TonFikng E UonEngi The individual functions the seguence above is zero seguence low current setting stage zero seguence high current setting stage zero seguence directionality and zero seguence overvoltage function must be enabled separately To enable the functions PROTLOG equations must be composed see Fig 2 22 The programming method of the PROTLOG equations is described in EuroProt EPCP 2004 manual PmxslonntOnt PmxslontOnt These parameters set the latching of the high set and low set zero sequence overcurrent protection command outputs to the appropriate matrix rows If the setting is which means that latching is set then the signal value 1 does not reset after the disappearing of Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 24 53 DTI3 KF EP PROTECTA ae Electronics Co Ltd User s guide the overcurrent state until acknowledgement The acknowledgement is to be programmed with PROTLOG equation An example is shown
28. he device contains optional digital input modules they must be enabled by parameter setting If they are not enabled the changes on the inputs will not be detected by the algorithm The enabling is allowed only if the input modules are available The faulty setting will cause errors in operation 2 5 4 Application of output relays Depending on the hardware configuration there can be 8 16 24 output relays available Out of the protection functions can drive the relays No 1 8 only The status signals of the protection functions are marshalled using tripping matrix see Fig 2 3 The status of the relays No 1 8 is inputs for the PROTLOG equations as well Relays No 9 16 can be programmed using PROTLOG equations The optional relay module module No 3 with relays No 17 24 can be driven by the supervisory and control functions only The output relays No 1 16 can be assigned individually to the supervisory and control functions This assignment can be programmed with parameters K i for SCADA K i for SCADA Assignment of relay No K i yes i 1 16 to the supervisory and control functions This setting is displayed on the On line screen of the Protect for Windows software according to Fig 2 20 Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 38 53 DTI3 KF EP PROTECTA Electronics Co Ltd User s guide i
29. he software matrix see similar example in Fig 2 5 2 4 1 4 Inputs of the PROTLOG equations Input Explanation Use REAN Staring of the over undervoltage function Us t timeout Over undervoltage function time over trip signal 2 4 1 5 The displayed information As a secondary product of the function the following information can be displayed on the integrated LDC of the device or on the PC screen Displayed information on the LCD using Test menu item Measured analogue values RS line to line voltage Fourier base harmonic ST line to line voltage Fourier base harmonic TR line to line voltage Fourier base harmonic Displayed status signals on the PC screen Signal Explanation U lt gt Enabled Function enabled YESA BEATE RS line to line voltage limit violation Heber Starts ST line to line voltage limit violation Ube oral TR line to line voltage limit violation U lt gt t timeout Over undervoltage function time over Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 28 53 DTI3 KF EP PROTECYA Electronics Co Ltd User s guide The displayed information on the On line PC screen of the Protect for Windows software information concerning other protection functions is masked ox I n ation Jr I Ist l Itr UCcalculated secondary kW Q3f lt g
30. he zero sequence voltage secondary value calculated as thel sum of the three phase voltages Displayed status signals on the PC screen Signal Explanation Io gt gt Enabled High current setting stage enabling Io gt Enabled Low current setting stage enabling IoFi gt Enabled Directional function enabling 1022 start Starting of the high current setting stage Io gt start Starting of the low current setting stage Io gt gt t timeout High current setting stage time over trip command To gt t timeout Low current setting stage time over trip command The displayed information on the On line PC screen of the Protect for Windows software information concerning other protection functions is masked Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 20 53 DTI3 KF EP PROTECYA Electronics Co Ltd User s guide 2 4 On line information Cmeasured gt 3Io A lt calculated gt o U lt calculated secondary Io enabled IoFi enabled Io gt start Io gt t timeout Uo gt start Uo gt t timeout Fig 2 10 On line data 2 The enabled state is indicated by a character for the overcurrent stages a character indicates starting or trip signal after time over 2 2 1 6 Messages of the function There is only one message related to the function Trip c
31. hen the primary rated voltage must be referred to the rated voltage of the device 100 V or 200 V Pee T ee od S FEE eee ms U lt gt 3 2 logic yes means that at least yes two of the three line to line voltages must violate the setting no means that one voltage violating the limit causes signal of the function FROTLOG equation equation FROTLOG equation Setting values as displayed on the PC screen using the Protect for Windows software is show non Fig 2 13 information related to other function is masked 8 Parameters Fig 2 13 Parameter setting 3 Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 27 53 DTI3 KF EP PROTECTA Electronics Co Ltd User s guide 2 4 1 3 Outputs of the function The functions deliver status signals indicating the operation Among others these will be the inputs rows of the software matrix These inputs can be marshalled with matrix programming to the outputs columns of the matrix The status signals of the functions can be inputs of the PROTLOG logic equations as well The matrix rows of the phase overcurrent protection function are Matrix row Explanation ae nk Staring of the over undervoltage function mae a Over undervoltage function time over trip signal These signals can be marshalled to the outputs using t
32. hich can be freely programmed to set output variables of the equation system 2 5 2 1 Inputs of the logic equations The available inputs for the logic equations are listed in the following table Input Explanation Input1 Input16 Status signal of the first 16 opto coupler digital inputs of the device K1 K8 Status signal of the first 8 relay outputs of the device TESz tsz sy BESZ Starting of the high current setting phase overcurrent function in the indicated phase Pro s gt Lt Starting of the low current setting phase overcurrent function in the indicated phase ean Time over of the high current setting phase overcurrent function TE Time over of the low current setting phase overcurrent function loe Starting of the high current setting zero sequence overcurrent function Toez E Time over of the high current setting zero sequence overcurrent function tos Starting of the low current setting zero sequence overcurrent function Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 35 53 DTI3 KF EP PROTECTA Electronics Co Ltd User s guide To gt t Time over of the low current setting zero sequence overcurrent function t Tl timeout Time over of the Ist free programmable timer t T2 timeout Time over of the 2nd free programmable timer D
33. ine voltages For these voltages the basic harmonic Fourier component is calculated which are the basis of over or undervoltage comparison The signal of over or undervolage can be issued based on a single voltage only or the signal can be sent if at least two voltages are violating the setting for the limit 2 4 1 Method of operation This function operates in the DTI MV EP factory configuration independently of the other protection functions 2 4 1 1 Analogue inputs of the function The analogue inputs of the functions are the three phase voltages Ur Us Ut Based of the phase voltages the line to line voltages Urs Ust Utr are calculated and then using Fourier method the basic harmonics are determined This method eliminates the zero sequence voltage caused by the neutral point displacement and the higher harmonics Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 26 53 DTI3 KF EP PROTECYA Electronics Co Ltd User s guide 2 4 1 2 Parameter setting This function needs setting of the following parameters Name LCD Min Max Step Explanation PUnk U lt gt Un VTprot 10 110 1 Setting of the function related of the rated input voltage of the device a overvoltage measurement FVPrn VTprot 1 m 32000 10 VT primary rated voltage If the VT rated secondary voltage is not identical with that of the device t
34. ix row Explanation Mx Timer 1 over Timer No 1 time over Mx Timer 1 over Timer No 2 time over The inputs of the PROTLOG equations Input Explanation t Tl timeout Timer No 1 time over t T2 timeout Timer No 2 time over 2 5 8 The LED signals If any of the protective functions operate the integrated LED s on the front panel give quick information about the event As a summary the following table shows the LED assignment for the DTI MV EP device Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 42 53 DTI3 KF EP PROTECTA ae Electronics Co Ltd User s guide Name Explanation LCD Warning LED active if a message is displayed on the LCD or in case of parameter changes an acknowledgement is needed CHK Self check error signal LR R phase fault LS S phase fault LT T phase fault L_I gt gt High current setting overcurrent stage trip LI gt Low current setting overcurrent stage trip L_Io Zero sequence overcurrent protection trips LED s can be programmed for latching In this case the signal is kept until acknowledgement after disappearing of the triggering Acknowledgement is to be programmed with a PROTLOG equation As an example Fig 2 22 shows acknowledgement by a signal on Input 8 remote acknowledgement or by pressing the SW1 pushbutton on the front
35. lated to other functions is masked Evaulated events demo picture Oj x JAG AG AG AG 700 y Protection start 66 66 66 HA 46 60 Protection reset Measured values U lt gt start RS U lt gt timeout U lt gt start ST U lt gt start TR Fig 2 16 Evaluated events 3 2 4 1 9 Counters The counter related to this function is U lt gt t counter This information is displayed on the On line PC screen as shown on Fig 2 17 2 4 On line information me i A lt gt t Counter Fig 2 17 Counters 3 Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 30 53 DTI3 KF EP PROTECTA Electronics Co Ltd User s guide 2 4 1 10 LED signals None of the seven integrated LEDs give signal related to this function 2 4 1 11 Information on the disturbance recorder This function generates the following information for the integrated disturbance recorder Analogue signals Explanation Phase R voltage primary value Phase S voltage primary value Phase T voltage primary value Digital signals of the over undervoltage function Explanation Starting of the function for RS line to line voltage Starting of the function for ST line to line voltage Starting of the function for TR line to line voltage Function time over 2 4 2 Setti
36. ll scale local control unit for the bay Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 3 53 DTI3 KF EP PROTECTA Electronics Co Ltd User s guide the supervisory and control functions are as follows control of switching devices local and remote operation interlocking functions generation of status signals event logging protective command transmission communication with the intelligent graphic display transmission of protection signals to the supervisory and control system transmission of commands signals from the supervisory and control system and their execution receipt of commands from the graphic LCD and their execution Continuous and cyclic self check functions are implemented the supervision is extended to the current transformer circuits and to the trip circuits as well The same software configuration is loaded in all configurations of the device The individual functions of the software are to be set by parameters according to the requirements The versions are basically determined by the hardware configuration The integrated event recorder can store up to 50 evaluated events and up to 300 digital events with ms time resolution An integrated real time clock is implemented with battery supported RAM The clock can be synchronised by external PC or by the supervisory and control sy
37. measured values of an independent measuring instrument and the displayed values It is advised to use a test set generating pure sinusoid test currents If the current setting is below the continuous overload capability of the input current transformers the tests can be performed using slowly increasing currents In case of higher current dynamic test method must be applied The test current must be switched on the input and check no operation at 95 setting values and no operation at 105 setting To check the time delay it must be considered that the time setting is an additional time delay it does not include the operation time of the measuring algorithm This measurement can be performed using currents twice of the current setting Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 25 53 DTI3 KF EP PROTECTA ae Electronics Co Ltd User s guide 2 3 Zero sequence overvoltage function The integrated zero sequence overvoltage function is an integral part of the directional zero sequence overcurrent protection but it can be applied as an independent function as well See details in chapter P2 2 in connection with the directional zero sequence overcurrent protection 2 4 Phase overvoltage and undervoltage function If the device contains voltage input module then the algorithm measures the three phase voltages and calculates the three line to l
38. mits and the hysteresis In case of exact angle measurement requirement the angle correction must be defined as well The operation characteristics of the directional function and the meaning of the parameters are drawn on Fig 2 8 K AT DROP OFF 3lo Fi max RANGE OF OPERATION Ree REMARK The value of Fi min can be above Fi max E g cos Fi characteristics Fi min 280 Fi max 80 Fig 2 8 The Fi Uolo setting The zero sequence high current setting stage does not have directionality and the only condition of the operation is the enabling Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 16 53 DTI3 KF EP PROTECTA ae Electronics Co Ltd User s guide 2 2 1 Zero sequence overcurrent protection method of operation The operation of the earth fault zero sequence overcurrent protection in the DTI MV EP factory configuration is independent of the operation of phase fault stages 2 2 1 1 Analogue inputs of the function In one way the function calculates the zero sequence current 3Io as the sum of the phase currents in the other way the zero sequence current is received from a core balance CT in a dedicated current input Ir Is lIt Io In case of directionality the function calculates the sum of the phase voltages Ur Us Ut Using Fourier algorithm the program calc
39. n l Petri Dr L szl Eperjesi 11 04 2004 8 53 DTI3 KF EP PROTECTA ae Electronics Co Ltd User s guide Fig 2 3 Marshalling of the outputs of the function matrix rows to the output relays of the device matrix columns 2 1 1 4 Inputs of the PROTLOG equations Input Explanation san ae Starting of the high current setting stage in the indicated phase It gt gt a 7 Starting of the low current setting stage in the indicated phase It gt eel Time over in the high current setting stage trip command T gt lE Time over in the low current setting stage trip command 2 1 1 5 The displayed information Displayed information on the integrated LCD of the device in the Test menu Measured analogous signals LCD information Irf Al Primary current in phase R expressed in Amperes is Al Primary current in phase S expressed in Amperes Lo lAl Primary current in phase T expressed in Amperes Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 9 53 DTI3 KF EP PROTECTA te Electronics Co Ltd User s guide Binary signals on the PC screen Signal Explanation T enabled 3 High current setting stage enabled Tear Ree Starting of the high current setting stage in phase R hey Start Starting of the high current
40. nction The CPU module includes a simplified disturbance recorder function In the DTI MV EP device the disturbance recorder handles the sampled analogue data and the status signals This function has not a man machine interface it can communicate only with a PC via fibre optic connection The records can be analysed on the PC screen cab be sent to a central engineering workstation or can be printed as well The summary of the analogue signals sent to the disturbance recorder function Signal Explanation Ir 5 R phase current expressed as a percentage of the rated current Is 5 S phase current expressed as a percentage of the rated current It 5 T phase current expressed as a percentage of the rated current 3190 5 The measured zero seguence current expressed as a percentage of the rated current Ur 5 R phase voltage expressed as a percentage of the rated voltage Us 5 S phase voltage expressed as a percentage of the rated voltage Ut 5 T phase voltage expressed as a percentage of the rated voltage Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 40 53 DTI3 KF EP PROTECTA Electronics Co Ltd User s guide Summary of the status signals sent to the disturbance recorder function Signal Explanation Elle a l s s Starting of the low current setting stage of the phase overc
41. ndervolatge stage start in phases TR Dee SZEKERET Over undervolatge stage timeout The Event menu displays the short messages with time stamp Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 48 53 DTI3 KF EP PROTECTA Electronics Co Ltd User s guide 3 1 2 The Test menu In this menu the LCD displays first the measured analogue values The scale is primary Ampere Steps among the displayed values by the arrow buttons 1 7 Value Explanation ha o z Base harmonic RMS value of the phase current in It A primary Ampere 3IoMeasured A Zero sequence current component as measured in input Io 3Io0Calculated A Zero sequence current component as calculated based on the phase current me 8 ee 7 Base harmonic RMS value of the phase to phase 2 Utr v voltages 3Uosecondary V The calculated zero sequence voltage in secondary Volts PoP ERM sz Three phase active power Q3F kVAr Three phase reactive power DTI2 status 1 Status words see below DTI2 status_2 The meaning of DTI2 status_1 is as follows DTI3 status I 11110111 Character J means active stat of a logic variable 0 means reset state The meaning of the bits from right to left Ir gt start Ir gt gt start Is gt start Is gt gt start TE gt start It gt gt start Io gt start To g
42. ng guide for the over undervoltage function The parameters to be set era described in chapter 2 4 1 2 The following guide refers to the parameters by the parameter name Punk Function setting related to the rated input voltage 100 V or 200 V PunkIrany Definition of under or overvoltage measurement In case of overvoltage function the value to be set is 07 for undervoltage function it is 1 PEV VT primary rated voltage If the VT rated secondary voltage e g 110 V or 220 V is not identical with that of the device then the primary rated voltage must be referred to the rated voltage of the device 100 V or 200 V For example for a VT rated 11000 110 V connected to a 100 V rated device input then the value to be set is 10000 PTUnk Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 31 53 DTI3 KF EP PROTECTA ae Electronics Co Ltd User s guide Time delay for the function PU32 Setting of the 3 2 logic yes means that at least two of the three line to line voltages must violate the setting no means that one voltage violating the limit causes signal of the function 2 4 3 Testing the over undervoltage function For the tests all other functions must be disabled In the tests the fact must be considered that the pre condition for the operation of the ov
43. nputs Out of the first 16 inputs are assigned to the protection part of the software as inputs of the PROTLOG equations The main protection functions do not test these inputs directly In order to apply these inputs 2x8 optical digital interfaces the modules must be enabled with parameter setting The parameters to be set are Se a a a ae ae Eng Ppto modul Enabling the first module ontaining digital inputs No 1 8 Eng pto module q Enabling the second module containing digital inputs No 9 16 This setting is displayed on the On line screen of the Protect for Windows software l Parameters Fig 2 19 Parameter setting 4 In order to save memory for longer records the integrated disturbance recorder function records the status of inputs No 1 8 only The supervisory and control functions implemented in the device can use all digital inputs If the device includes the optional output circuit supervision module see EPCP 2004 there are four additional inputs for free application Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 37 53 DTI3 KF EP PROTECTA ae Electronics Co Ltd User s guide 2 5 3 1 Setting guide The parameters to be set are described in chapter 2 5 3 The following guide refers to this parameter by the Parameter name OlModuleEng O2ModuleEng If t
44. ommand To enable this message a PROTLOG logic equation must be composed for the Trip command logic variable Fig 2 5 sows an example 2 2 1 7 Event recording The event recording function record the following events with time stamp as displayed on the integrated LCD 1022 start Io gt start Io gt t timeout Io gt gt t timeout Uo gt start Uo gt t timeout Uo gt gt t timeout 2 2 1 8 Evaluated events Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 21 53 DTI3 KF EP PROTECTA Electronics Co Ltd User s guide The dedicated PC window displays the related information as show non Fig 2 11 The information related to other functions is masked Eyaulated events demo picture Fig 2 11 Evaluated events 2 2 2 1 9 Counters This protection function operates the following counters as displayed on the integrated LCD To gt gt t Counter Io t Counter Uo gt t Counter This information is displayed on the On line PC screen as shown on Fig 2 12 On line information Counter Io gt gt t Counter Counter Fig 2 12 Counters 2 2 2 1 10 LED indication Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 22 53 DTI3 KF EP PROTECTA Electronics Co Ltd User s guide
45. on involves the following counters displayed on the integrated LCD of the device I gt t counter 8 I gt gt t counter 3 The counter values are displayed in the On line PC screen as shown in Fig 2 7 On line information a Oj x Counter Counter Fig 2 7 Counters 1 2 1 1 10 LED indication The operation of the functions integrated into the device is indicated by seven LED s located on the front panel The LED s shown in the following table are related to the phase overcurrent protection LEDs are numbered from top to bottom LED No LED text Explanation 4 IS Starting in phase S 5 IT Starting in phase T Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 12 53 DTI3 KF EP PROTECTA Electronics Co Ltd User s guide 6 D gt High set current stage start 7 I gt Low set current stage start 2 1 1 11 Signals recorded in the disturbance recorder The integrated disturbance recorder records the following signals Analogue signals Explanation Current in phase R as percent of the CT rated current Current in phase S as percent of the CT rated current Current in phase T as percent of the CT rated current Digital signals Explanation Loe High current setting stage start in phase R High current setting stage sta
46. rt in phase S High current setting stage start in phase T High current setting stage time over trip Low current setting stage start in phase S Low current setting stage start in phase T Low current setting stage time over trip i i Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 13 53 DTI3 KF EP PROTECTA Electronics Co Ltd User s guide 2 1 2 Setting guide The parameters to be set are described in chapter 2 1 1 2 The following guider refers these parameters by the Parameter name PAV This is the primary rated current of the CT This setting is not needed for the protection decision about trip command the value is used only for scaling the measured values for displaying The algorithm supposes that the secondary rated CT value is identical to the rated current of the device 1 A or 5 A In case this is not valid e g 1 A CT supplies a 5 A current input then the primary rated current must be rescaled according to the rated current of the device Pin Low current setting for the phase fault overcurrent protection related to the input rated current calculated in PiInn High current setting for the phase fault overcurrent protection related to the input rated current calculated in PTInn Time delay for the high current setting stage definite time The parameter is
47. stem and additionally a Word Time Synchroniser GPS OP produced by PROTECTA Co Ltd can be ordered optionally The integrated disturbance recorder of the CPU module can store up to 11 records the total time of which is about 10 s The device implements several measuring functions based on the available analogue signals Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 4 53 DTI3 KF EP PROTECTA Electronics Co Ltd User s guide 1 2 Main hardware features The DTI MV EP complex digital overcurrent protection is a full numerical system based on powerful microcontrollers Within the limits of the hardware the functions and the versions are determined by the software The different hardware versions of the device with identical software cover practically all usual protective functions of the medium voltage part of the electric power system The hardware versions are as follows ID Meaning 3FIo 3 phase zero sequence current measurement the zero sequence current can be directed by calculated Uo zero sequence voltage 3FU 3 phase voltage measurement calculated Uo xK number of relay outputs max 24 XD number of optically isolated inputs max 32 UKE unit for trip circuit supervision The maximum possible configuration EuroProt complex protection DTI MV EP factory configuration HW
48. t enabled rs lt gt start Uo gt start st lt gt start Uo gt t timeout ts lt gt start lt gt t timeout Fig 2 14 On line data 3 The enabled state is indicated by a character for the over undervoltage function a character indicates starting or trip signal after time over The measured voltages and currents allow power measurement as well LCD Explanation P3F kW Calculated three phase active power Q3F kvar Calculated three phase reactive power This information is displayed on the PC screen as follows s On line information Oj x P3f kW Q3f kUAr Fig 2 15 On line data 4 2 4 1 6 Message of the function There is only one message related to the function Trip command To enable this message a PROTLOG logic equation must be composed for the Trip command logic variable Fig 2 5 sows an example Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 29 53 DTI3 KF EP PROTECTA te Electronics Co Ltd User s guide 2 4 1 7 Event recording The event recording function record the following events with time stamp as displayed on the integrated LCD Urs lt gt start Ust lt gt start Utr lt gt start U lt gt t timeout 2 4 1 8 Evaluated events The dedicated PC window displays the related information as show non Fig 2 16 The information re
49. t gt start When pressing button the second status word DTI2 status_2 is displayed DTI3 status 2 11110000 Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 49 53 DTI3 KF EP PROTECTA Electronics Co Ltd User s guide The meaning of the bits from right to left Uo gt start EEPROM error Battery discharged A D error internal signal internal signal internal signal internal signal wv wH A further step with button displays the counter values I gt t counter I gt gt t counter To gt t counter Io gt gt t counter Uo gt t counter U lt gt t counter 3 1 2 1 The test menu In this menu the parameter settings can be checked Setting is not possible here See Param menu 3 1 2 2 The Version menu When selecting this menu item the type of the device the configuration and the version is displayed together with the date of the program compilation DTI KF EP IRT 07 11 2003 V1 0 3 1 3 The Param menu The Param parameter setting menu can be used to set the protection parameters and the parameters for the communication and the software matrix as well The list of the parameters to be set and the setting limits with steps are explained in the function descriptions above 3 1 3 1 Parameters conc
50. t is that the message disappears Wen more than one messages are active the first acknowledgement displays the next message After the last active message the normal display function will be active again and the red LED announcing the active messages disappears The active messages are not displayed in the correct event sequence but according to the list above Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 44 53 DTI3 KF EP PROTECTA Electronics Co Ltd User s guide The messages of the protection functions and the self check error messages are logged in the event recorder with time stamp The log can store up to 50 events with scanned analogue values The time resolution is ms In the digital event sequence recorder up to 300 digital events can be recorded These recorded events are stored after acknowledgement as well The event log can be displayed on the man machine interface of the device on the PC screen via serial line using the Protect for Windows software and the events are sent to the supervisory and control system too 2 5 10 Displayed values Summary The algorithms as applied in the protection functions as by products measure and calculate several quantities These values can be displayed on the LCD of the device they are listed on the PC screen when using Protect for Windows software they are sent to the supervisory
51. tection decision it is needed only for scaling the displayed measured value The algorithm assumes that the secondary rated current of the CT is identical with that of the device 100 mA 1A or 5 A If the values are different than the primary value must be related to the rated current of the device Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 23 53 DTI3 KF EP PROTECTA ae Electronics Co Ltd User s guide Puon Setting value of the zero sequence overvoltage protection function related to the rated input voltage of the device The parameter is expressed in percent PioUoFiMin PioUoFiMax Lower and upper angle limit of the directional zero sequence earth fault overcurrent protection The angles are expressed in degrees The setting range is 0 359 Negative angles can not be set The limits are explained in Fig 2 8 The numerical value of the FiMin angle can be above the FiMax value For example the realisation of a cos Fi function the possible setting can be FiMin 280 FiMax 80 PioUoFiHiszt After starting the angle range of the function opens according to the hysteresis value expressed in degrees angle drop off ratio See Fig 2 8 PioUoFiKomp With this parameter the angle errors of the VT and CT can be compensated The meaning of this angle value is as
52. the time delay it must be considered that the time setting is an additional time delay it does not include the operation time of the measuring algorithm This measurement can be performed using currents twice of the current setting Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 15 53 DTI3 KF EP PROTECTA Electronics Co Ltd User s guide 2 2 Earth fault zero sequence overcurrent protection One of the main functions of the complex DTI MV EP protection is the earth fault zero sequence overcurrent protection The device measures the zero sequence current in two different ways the zero sequence current is received by an independent analogue input and the zero sequence current is calculated as the sum of the three phase currents This function is a two stage definite time overcurrent protection The earth fault protection is similar to the phase fault overcurrent protection but the operation of the low current setting stage besides the enabling has some special conditions as well no operation of the phase fault current stages and if the directionality is enabled then the zero sequence overvoltage function must start too and the phase angle between the zero sequence voltage and the zero sequence current must be between the pre set limits The setting of the directional function needs determination of the lower and upper angle li
53. ulates the base harmonic of the zero sequence currents received from both sources The zero sequence current calculated as the sum of three phase currents is applied by the high current setting stage the current measured in a dedicated current input sis used by the low current setting stage At start of both stages the dedicated timers are started If any of them runs out the function issues the trip command Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 17 53 DTI3 KF EP PROTECTA Electronics Co Ltd User s guide 2 2 1 2 The parameter setting The protection function needs setting of the following parameters 1 On the integrated LCD ax Step Explanation Setting of the zero sequence low current setting stage as percent of the rated CT current 5 Setting of the zero sequence high current setting stage as percent of the rated CT current AvoPrN CToProt 1 The primary rated current of the zero sequence CT reduced to 100 mA or 500 mA secondary value used only to scale the displayed values Uo gt Un VTprot 5 Setting of the zero sequence overvoltage function as percent of the rated voltage of the device 1 Lower angle limit 1 Upper angle limit IoUo hist Hysteresis of the angle measurement drop off ratio of angle decision 1 Angle error compensation High current setting stage time delay Low current setting stage tim
54. urces 64 A Previous I gt gt it Trip command Dit bra Io gt gt t Pte Io gt t t Ti timeout Uo gt t timeout Fig 2 5 PROTLOG equation for the message 2 1 1 7 Event recording The event recorder function records the following events with time stamp See details of event recording in the EPCP 2004 documentation The integrated LCD of the device can display the following messages T gt gt R start y I gt gt S start WLS gt T Start y I gt R start y I gt S start y I gt T start TI gt t timeout hi I gt gt t timeout 2 1 1 8 Evaluated events The Protect for Windows software displays the evaluated event in a separate window according to Fig 2 6 Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 11 53 DTI3 KF EP PROTECTA A Electronics Co Ltd User s guide Evaulated events demo picture Bj x Protection start Protection reset Measured values Ir z Is B xz It z 310 B xz measured I gt gt start phase R I gt gt timeout I gt gt start phase S I gt timeout I gt gt start phase T Io gt gt timeout I gt start phase R Io gt timeout I gt start phase S Uo start I gt start phase T Uo gt timeout Fig 2 6 Evaluated events 1 2 1 1 9 Event counters The phase overcurrent functi
55. urrent function individually in the phases Dies VAA SAN Starting of the high current setting stage of the phase overcurrent function individually in the phases 107 Starting of the low current setting stage of the zero seguence overcurrent function Torz Starting of the high current setting stage of the zero sequence overcurrent function I gt t Phase overcurrent function low current setting stage time over Isalt Phase overcurrent function high current setting stage time over Io gt t Zero sequence overcurrent function low current setting stage time over Loe eed Zero sequence overcurrent function high current setting stage time over por Starting of the zero sequence overvoltage function Uo gt tt Zero sequence overvoltage function time over Urs lt gt Ust lt gt Utr lt gt Starting of the line to line over undervolatge function vez ET Line to line over undervolatge function time over Inp 1 n Status signals of digital inputs 1 8 KI K4 Status signals of digital outputs 1 4 The disturbance recorder function operates with factory settings For the user the only possibility for interaction is to write logic equation for the triggering with the Protect for Windows program see EPCP 2004 As an option the device can be extended with a separate disturbance recorder module For this module the user can configure the trigger signal level or edge triggering
56. urrent setting stage Mx 3Io gt gt t High current setting stage time over trip command Mx 3Io gt t Low current setting stage time over trip command ee Starting of the zero sequence overvoltage stage Mx Uo gt lti Zero sequence overvoltage stage time over trip command These signals can be marshalled to the outputs using the software matrix see similar example in Fig 2 5 Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 19 53 DTI3 KF EP PROTECTA Electronics Co Ltd User s guide 2 2 1 4 Inputs of the PROTLOG equations Equation inputs Explanation aa Start of the high current setting stage Lor Start of the low current setting stage Lone VE High current setting stage time over trip command To gt t Low current setting stage time over trip command Start of the zero sequence overvoltage stage Zero sequence overvoltage stage time over trip command Uo gt Uo t 2 2 1 5 The displayed information As a secondary product of the function the following information can be displayed on the integrated LDC of the device or on the PC screen Displayed information on the LCD using Test menu item Measured analogue values Explanation Zero sequence current as measured on the dedicated input Zero sequence current calculated as the sum of the three phase currents T
57. version 3Flo 3FU 24K 32D UKE Minimum configuration EuroProt complex protection DTI MV EP factory configuration HW version 3Flo 8K 42TE The design and the man machine interface of the device is described in EPCP 2004 manual The man machine interface of the device is the integrated 2x16 character LCD the simple keyboard with 6 pushbuttons and the 7 LED s on the front panel The device can be supervised easier with a connected PC which runs the windows based operating program Protect for Windows developed by Protecta Co Ltd The user s manual for all these possibilities is the EPCP 2004 documentation The medium for the external communication is the 2 kV isolated serial RS 232 interface located on the front panel of the device or the two integrated fibre optic interfaces connector son the back panel For the serial communication please find detailed information in the EPCP 200 documentation Compiled by Approved by Date Page Korn l Petri Dr L szl Eperjesi 11 04 2004 5 53 DTI3 KF EP PROTECTA ae Electronics Co Ltd User s guide 2 The protection functions The DTI MV EP complex numerical protection implements the following protection functions Definite time overcurrent protection for phase faults Zero sequence overcurrent protection for earth faults with optional direction function Zero sequence overvoltage protection Over undervolt
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