CYG PRS-7367 Instruction Manual
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CYG PRS-7367 Instruction Manual

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PRS-7367
Protection and Control Unit
Instruction Manual
CYG SUNRI CO., LTD.

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  • Page 1 PRS-7367 Protection and Control Unit Instruction Manual CYG SUNRI CO., LTD.

  • Page 3: Preface

    Documentation and manufactured equipment purchased from CYG SUNRI CO., LTD. are dispatched separately due to the necessary manufacturing period. Therefore, they sometimes may not reach the recipients at the same time. Therefore, this manual is provided as a technical reference to commission the equipment.

  • Page 4: Warning Indications

    Severe personal injury and significant device damage could result from improper behavior. WARNING! Do NOT touch the exposed terminals of this device while the power supply is on. The generated high voltage causes death, injury, and device damage. WARNING! PRS-7367...
  • Page 5 CYG SUNRI CO., LTD. reserve all rights to this document and to the information contained herein. CYG SUNRI CO., LTD. has made every effort to ensure that this document is accurate. CYG SUNRI CO., LTD. disclaims liability for any inaccuracies or omissions that may have occurred.

  • Page 6: Documentation Outline

    Preface CYG SUNRI CO., LTD. Tel: +86-400-678-8099 Headquarters: No.13, Keji North 1st Road, North Area of Hi-tech Website: http://www.sznari.com Industrial Park, Nanshan District, Shenzhen, China P/N: ZL_PRS-7367_X_Instruction Manual_EN_Overseas General_X Version: 2.13 Documentation Outline The manual provides a functional and technical description of this relay and a comprehensive set of instructions for the relay’s use and application.
  • Page 7 A general maintenance steps for this device is outlined. 13 Decommissioning and Disposal A general decommissioning and disposal steps for this relay is outlined. 14 Manual Version History List the instruction manual versions and their corresponding modification history records. PRS-7367...

  • Page 9: Table Of Contents

    2.3 Ambient Temperature and Humidity Range ..........22 2.4 Communication Interfaces ................23 2.4.1 Ethernet Port ........................23 2.4.2 Serial Port .......................... 23 2.4.3 Time Synchronization ......................23 2.4.4 Ethernet Port for Debugging ....................24 2.5 Type Tests ....................... 24 2.5.1 Environmental Tests ......................24 PRS-7367...
  • Page 10 3.1 Overview ......................32 3.1.1 Glossary ..........................32 3.1.2 System parameter ......................34 3.2 Non-directional overcurrent protection 50/51P ........... 35 3.2.1 50/51P Overview ........................ 35 3.2.2 50/51P Protection Principle....................36 3.2.3 50/51P Application Scope ....................39 3.2.4 50/51P Settings ........................39 PRS-7367...
  • Page 11 3.7.3 50BF Application Scope ..................... 73 3.7.4 50BF Settings........................73 3.8 Three-phase thermal overload protection 49F ..........74 3.8.1 49F Overview ........................74 3.8.2 49F Protection Principle ..................... 75 3.8.3 49F Application Scope ....................... 76 3.8.4 49F Settings ........................77 PRS-7367...
  • Page 12 3.13.2 59G Protection Principle ....................90 3.13.3 59G Application Scope..................... 91 3.13.4 59G Settings ........................92 3.14 Negative sequence overvoltage protection 59N ........92 3.14.1 59N Overview........................92 3.14.2 59N Protection Principle ....................93 3.14.3 59N Application Scope ..................... 94 3.14.4 59N Settings........................94 PRS-7367...
  • Page 13 3.19.2 81URS Protection Principle ...................106 3.19.3 81URS Application Scope ....................107 3.19.4 81URS Settings ......................108 3.20 Under frequency restore protection 81URE ..........108 3.20.1 81URE Overview ......................108 3.20.2 81URE Protection Principle ...................109 3.20.3 81URE Application Scope ....................110 3.20.4 81URE Settings ......................110 PRS-7367...
  • Page 14 3.25.3 51NT Application Scope ....................140 3.25.4 51NT Settings ........................141 3.26 Voltage unbalance protection 59NA ............141 3.26.1 59NA Overview ......................141 3.26.2 59NA Protection Principle ....................142 3.26.3 59NA Application Scope ....................144 3.26.4 59NA Settings ........................144 3.27 Three phase voltage unbalance protection 59NT ........145 PRS-7367...
  • Page 15 3.31.1 Overview ........................156 3.31.2 Protection Principle ......................158 3.31.3 Application Scope ......................159 3.31.4 Settings ..........................159 3.32 Mechanical Protection MP................. 159 3.32.1 Overview ........................159 3.32.2 Protection Principle ......................160 3.32.3 Application Scope ......................161 3.32.4 Settings ..........................161 3.33 General function block ................161 PRS-7367...
  • Page 16 3.37.4 Settings ..........................187 3.38 Wattmetric sensitive earth-fault protection SEF ........188 3.38.1 Overview ........................188 3.38.2 Protection Principle ......................189 3.38.3 Application Scope ......................192 3.38.4 Settings ..........................192 3.39 Under Current Protection 37C ..............193 3.39.1 Overview ........................193 3.39.2 Protection Principle ......................194 PRS-7367...
  • Page 17 3.44.1 Overview ........................210 3.44.2 Logic Diagram ........................ 211 3.44.3 Protection Principle ......................211 3.45 Faulty Phase Selection (FPS) ..............211 3.45.1 Overview ........................211 3.45.2 Operation Principle ......................212 3.45.3 Settings ..........................213 3.46 Stabilized differential protection for machines 87MPDIF ....... 214 PRS-7367...
  • Page 18 3.50 The locked-rotor protection MDZS ............226 3.50.1 Overview ........................226 3.50.2 Principle .........................227 3.50.3 Settings ..........................227 3.51 Synchronous Motor Loss of Step 78O ............. 228 3.51.1 Overview ........................228 3.51.2 Principle .........................228 3.51.3 Settings ..........................230 3.52 Synchronous Motor Loss of Excitation 40O ..........231 PRS-7367...
  • Page 19 5 Monitoring & Control ..............244 5.1 Overview ....................... 244 5.2 Control SYN ....................244 5.2.1 25SYN Overview ......................244 5.2.2 SYN Operation Principle ....................245 5.2.3 25SYN Check Result .......................249 5.2.4 25SYN Check Block ......................250 5.2.5 25SYN Application Scope ....................250 5.2.6 25SYN Settings ........................251 PRS-7367...
  • Page 20 5.9.2 Fault Record Events ......................262 5.9.3 Alarm Record Events .......................262 5.9.4 Device Record........................263 5.9.5 Sequence of Event ......................263 5.10 Fault and Disturbance Recording ............. 264 5.10.1 Wave Recording File Format ..................264 5.10.2 Fault Wave File ......................264 5.10.3 Waveform Recording Duration..................264 PRS-7367...
  • Page 21 7.3 Sub menu functions of main menu ............288 7.3.1 Physical Information ......................288 7.3.2 Review Information ......................291 7.3.3 Monitoring Information .....................292 7.3.4 Event Information ......................295 7.3.5 Record Information ......................299 7.3.6 Setting Information ......................300 7.3.7 Configuration Information ....................303 7.3.8 Test Information ........................306 PRS-7367...
  • Page 22 9.5.2 Link Layer Functions ......................322 9.5.3 Transport Functions ......................322 9.5.4 Application Layer Functions .....................322 10 Commissioning ................. 325 10.1 General ....................... 325 10.2 Safety Instructions ..................325 10.2.1 Safety Identification ......................325 10.2.2 Safety Identification Examples ..................325 10.3 Commission Tools ..................327 PRS-7367...
  • Page 23 11 Installation ................. 335 11.1 General ......................335 11.2 Safety Instructions ..................335 11.3 Checking the Shipment ................335 11.4 Material and Tools Required ..............336 11.5 Device Location and Ambient Conditions ..........337 11.6 Mechanical Installation ................337 PRS-7367...
  • Page 24 12.3.2 Software Failure ......................344 12.4 Replace Failed Modules ................344 13 Decommissioning and Disposal ..........345 13.1 Decommissioning ..................345 13.1.1 Switching off ........................345 13.1.2 Disconnecting cables .....................345 13.1.3 Dismantling ........................345 13.2 Disposal ...................... 345 14 Manual Version History ............349 PRS-7367...

  • Page 25: Briefly Introduction

    The PRS-7367 is a numerical distributed protection intended for protecting and monitoring various primary apparatus including overhead line, underground cable, transformer, capacitor, etc. PRS-7367 can be used in various voltage level, generally ranging from 10kV to 35kV. PRS-7367 can detect and clear all types of internal phase-to-phase.
  • Page 26 Briefly Introduction Description IEC 60617 ANSI CYG Code protection Three phase under voltage 3U< protection Positive sequence undervoltage U1< protection Overfrequency protection f> Underfrequency protection f< 81URS Underfrequency restore protection 81URE Frequency gradient protection Df/dt<> Auto-recloser O ->I Synchrocheck SYNC...

  • Page 27: Product Features

    Briefly Introduction Description IEC 60617 ANSI CYG Code Stabilized differential protection for 3dI>G/M 87MPDIF machines Flux-balance based differential 3dIHi>G/M 87MFDIF protection for machines Machine Startup Long start protection MQDS The locked-rotor protection MDZS Synchronous Motor Loss of Step Synchronous Motor Loss of Excitation 1.3 Product Features...
  • Page 28 1024 latest records of time tagged sequence of event (SOE) can be recorded.  Powerful fault and disturbance recording function is supported: 16 latest fault disturbance waves, 16 latest start disturbance waves and 4 manual disturbance waves, the duration of a wave recording is configurable. PRS-7367...

  • Page 29: Technical Specifications

    Ripple in the DC auxiliary voltage Class A (15% of rated @200Hz, 220VDC) ≤22W (normal state), Maximum load of auxiliary voltage ≤25W (maximum state) supple 2.1.4 Binary Input Reference IEC 60255-1, Clause:6.10.5 Binary input number Up to 36 Rated voltage 24VDC~250VDC, 48V~250VAC PRS-7367...

  • Page 30: Binary Output

    Housing color Silver grey Location of terminal Rear panel of the device Front side: IP40 (IP52 with seal strip) Protection class IEC60225-1: 2009 Rear side, connection terminals: IP20 Other Sides: IP40 2.3 Ambient Temperature and Humidity Range Standard IEC 60255-1:2009 PRS-7367...

  • Page 31: Communication Interfaces

    IEC60870-5-103:1997, DNP3.0 etc. Safety level Isolation to ELV level 2.4.3 Time Synchronization Medium Parameters Port number ≤ 500m Transmission distance RS-485 (EIA) Maximal capacity Timing standard IRIG-B Safety level Isolation to ELV level Port number Optical Ethernet ≤ 2000m Transmission distance PRS-7367...

  • Page 32: Ethernet Port For Debugging

    2.5.2 Mechanical Tests IEC 60255-21-1, IEC Class 1： Vibration Response: Class 1 (10-59Hz: Vibration response test 60255-27 0.035mm, 59-150Hz: 0.5gn) IEC 60255-21-1, IEC Vibration Endurance: Class 1 (10-150Hz: 1gn) 60255-27 IEC 60255-21-2, IEC Shock Response Class 1 (5gn) 60255-27 PRS-7367...

  • Page 33: Electrical Tests

    L-L: 2kV, voltage waveform: 1.2/50µs, current IEC 60255-26, IEC Surge Immunity Test waveform: 8/20µs； Communication Port: L-E: 1kV, 61000-4-5 L-L: -, voltage waveform: 1.2/50µs, current waveform: 8/20µs ) Conducted radio IEC 60255-26, IEC 150kHz~80MHz(Uo: 140dB µV or Uo: 10V) interference test 61000-4-6 PRS-7367...

  • Page 34: Terminals

    Frequency range: 30MHz - 230MHz (Quasi Peak: Radiated interference IEC 60255-26, CISPR 22 40µV), Frequency range: 230MHz - 1000MHz (Quasi Peak: 47µV) 2.6 Terminals Connection Type Wire Size CT and VT circuit connections Screw terminals,4mm lead Binary I/O connection system Screw terminals, 2.5mm lead PRS-7367...

  • Page 35: Measurement Range And Accuracy

     TransientOverreach [%] ( 2 / 1 1) *100% Where: Is1: The Current settings when the relay does not work without conditions DC offset Is2: The current setting when the relay does not work in situations where DC offset PRS-7367...

  • Page 36: Residual Overcurrent Protection

    ± 1.0% of the set value or ± 40 ms 2.8.5 Over/Under Frequency Protection Function Accuracy ± 0.01Hz, 30.00-70.00 at Fn=50; 40.00-80.00 at Tolerance of operating frequency Fn=60 Tolerance of blocking voltage ± 1.0% of the set value or ± 0.005 × Un PRS-7367...

  • Page 37: Over/Under Voltage Protection

        IEC 60255-8, ± 5% + 200ms    2.8.10 Auto-Reclose Function Accuracy Tolerance of operating time ± 1.0% of the set value or ± 40 ms 2.8.11 OCR_INR Function Accuracy Operate accuracy Current measurement: PRS-7367...

  • Page 38: Sensitive Earth Fault

    ± 1.0% of the set value or ± 40 ms 2.8.15 Differential Protection Function Accuracy Operate current ± 1.0% of the set value or ± 0.005 × In ≤45ms Reset time  S Value 0.005 Typically 96%(± 3%), Or ( )(± 3%) Reset ratio S Value PRS-7367...
  • Page 39 Technical Specifications Tolerance of operating time ± 1.0% of the set value or ± 40 ms ≤40ms Transient accuracy overshoot PRS-7367...

  • Page 40: Protection Functions

    3 Protection Functions 3.1 Overview The PRS-7367 relay is a microprocessor based relay which can provide mature protection for various primary equipment (generally all types of feeders, capacitors etc.). The following sections detail the individual protection functions of this relay.
  • Page 41 Parameter Para Multiplier Mult Minimum Alarm Operation Reclose Recls Counter Counter Correction Correction Available Avai Initial Init Reference Normal Norm Restraint Restr Slope Slope Deblock Deblk Winding Elimination Elim Nominal Connection Connection Hysteresis Hyst Compensation Comp Check Synchronize Synchronization PRS-7367...

  • Page 42: System Parameter

    No.1 protection VT The rated secondary value of the Prot_TV_Secondary 0.01~1000 0.01 No.1 protection VT The rated primary value of the Prot2_TA_Primary 1-9999 1000 No.2 protection phase CT The rated secondary value of the Prot2_TA_Secondary No.2 protection phase CT PRS-7367...

  • Page 43: Non-Directional Overcurrent Protection 50/51P

    (IDMT). Configuring the relevant settings can enable or disable the corresponding protection. 3.2.1.1 Function Block The function block of the protection is as below. Str_A Str_B Str_C Blk_Str Op_A Blk_Op Op_B Ena_Mult Op_C Figure 3.2-1 Function block PRS-7367...

  • Page 44: 50/51P Protection Principle

    51P_Ena parameter values as "1" or "0". The operation of the overcurrent protection can be described using a module diagram. All the modules in the diagram are explained in the next sections.  Initiation logic The initiation logic diagram of the protection is as below: PRS-7367...
  • Page 45 The start value multiplication is normally done when the inrush detection function (OCR_INR) is connected to the Ena_Mult input by Three phase inrush function OCR_INR.  Timer element The functional module diagram is shown as below: PRS-7367...
  • Page 46 Configuring the relevant settings can enable or disable the corresponding protection. The principle is same as the 51P except 50P time delay is instantaneous. 50P_Str 50P_Blk_Str=1 & 50P_Blk=1 50P_Str_A/B/C & Initiation 50P_Op_T 50P_Op & & 50P_Blk_Op=1 50P_Op_A/B/C & 50P_Alm 50P_Alm_Ena=1 Figure 3.2-4 Functional module diagram for 50P PRS-7367...

  • Page 47: 50/51P Application Scope

    In the following table, i is the protection stage number, it can be set according to the requirements. Table 3.2-3 50P settings Name Values(Range) Unit Step Default Description The Stage i instantaneous OC 50Pi_Cur_Str 0.04-20.00In 0.01In 0.04In Start current value The Stage i instantaneous OC 50Pi_Mul_Cur 0.8 - 10.0 Multiplier current start value PRS-7367...
  • Page 48 The Stage i OC Reset time delay The Stage i OC Operation 51Pi_Ena Enable/Disable The Stage i OC Alarm 51Pi_Alm_Ena Enable/Disable The Stage i OC Number of phases 51Pi_Str_Ph_Num required for operate activation Table 3.2-5 51PVT settings Name Values(Range) Unit Step Default Description PRS-7367...

  • Page 49: Directional Overcurrent Protection 67P

    (DT) or inverse definite minimum time (IDMT). Configuring the relevant settings can enable or disable the corresponding protection. 3.3.1.1 Function Block The function block of the protection is as below. PRS-7367...
  • Page 50 This is the start signal of phase A Str_B This is the start signal of phase B Str_ C This is the start signal of phase C. This is the integrated operation signal. Op_A This is the operation signal of phase A PRS-7367...

  • Page 51: Protection Principle

    Then the 67P VCE condition is fulfilled. 67P_Vol_Ena Uab<67P_Low_Vol Ubc<67P_Low_Vol 67P_VCE_Str Uca<67P_Low_Vol 67P_Neg_Vol _Ena=1 & U2>67P_Neg_Vol Figure 3.3-3 The Initiation Logic Diagram VCE Start  Directional element PRS-7367...
  • Page 52 The evaluation of the backward directionality is according to the equation: （ ） j RCA     90 ( 5 ) arg 270 ( 5 )  is the max angle margin. are the polarizing current and voltage. RCA is the relay characteristic angle. PRS-7367...
  • Page 53 The start value multiplication is normally done when the inrush detection function (OCR_INR) is connected to the Ena_Mult input by Three phase inrush function OCR_INR. If the fault criteria are fulfilled in the current level and the directional calculation, the phase PRS-7367...

  • Page 54: Application Scope

    67P is used as short-circuit protection in three-phase distribution or sub transmission networks operating at 50 or 60 Hz. In radial networks, phase overcurrent IEDs are often sufficient for the short circuit protection of lines, transformers and other equipment. PRS-7367...

  • Page 55: Settings

    The Stage i Reset time delay The Stage i Protection 67Pi_Ena enable/disable The Stage i Voltage setting 67Pi_Vol_Blk_Ena enable/disable 67Pi_Alm_Ena The Stage i Alarm Enable/Disable The Stage i Number of phases 67Pi_Str_Ph_Num 1 out of 3 required for operate activation PRS-7367...

  • Page 56: Non-Directional Earth-Fault Protection 51G

    The current magnitude in all the three phases This signal blocks all the binary output signals of the function Blk _Str This signal blocks all the start outputs of the function Blk _Op This signal blocks all the trip signals of the function. PRS-7367...

  • Page 57: Protection Principle

    Otherwise the measured residual current is used. The operating quantity is compared to the set 51G_Cur_Str. If the measured value exceeds the set 51G_Cur_Str, the level detector sends an Initiation signal to the timer module. PRS-7367...
  • Page 58 The binary input 51G_Blk can be used to block the function. The activation of the 51G_Blk input deactivates all outputs and resets internal timers. The binary input 51G_Blk_Str can be used to block the 51G_Str signals. The binary input 51G_Blk_Op can be used to block the 51G_Op signals. PRS-7367...

  • Page 59: Application Scope

    The Stage i Multiplier for scaling 50Gi_Mul_Cur 0.8 - 10.0 the start value The Stage i Operating time for 50Gi_Op_T 0.0-0.200 0.001 0.000 IDMT 50Gi_Reset_T 0.000 -60.000 0.001 0.02 The Stage i Reset delay time 50Gi_Ena The Stage i Operation PRS-7367...
  • Page 60 The Stage i Multiplier for scaling 51GVTi_Mul_Cur 0.8 - 10.0 the start value Definite time IEC Normal inverse IEC Very inverse 51GVTi_Curve_Type IEC Extremely inverse IEC Long-time inverse Programmable user-defined 51GVTi_Curve_ParaA 0.000~120.000 0.001 The Stage i Curve parameter A PRS-7367...

  • Page 61: Directional Earth-Fault Protection 67G

    3.5.1.1 Function Block The function block of the protection is as below. OCTG_67G PTSAlm CTSAlm Blk_Str Blk_Op Ena_Mult Figure 3.5-1 Function block 3.5.1.2 Signals Table 3.5-1 Input Signals Signal Description The voltage in all the three phases PRS-7367...

  • Page 62: Protection Principle

    Figure 3.5-2 The directional logic diagram Self-polarizing is used (I -(-U )) to determine the fault direction. The evaluation of the forward directionality is according to the equation: jRCA             PRS-7367...
  • Page 63 Voltage control element 67G_Vol_Ena=0 67G_VCE_Str 67G_Vol_Ena=1 & Uo>67G_Vol_Str Figure 3.5-3 The voltage control logic diagram  PTS Alarm Blocking of 67G The PTS alarm can be set by PTS_Blk setting, if PTS_Blk=1 and the PTS Alm signal is 1, the 67G PRS-7367...
  • Page 64 67G_Cur_Str, the VCE and Directional condition are met, 67G is initiation. If the 67G_Ena_Mult input is active, the 67G_Cur_Str setting is multiplied by the 67G_Mult_Cur_Str setting. The start value multiplication is normally used in case that the inrush situation happens. NOTICE! PRS-7367...
  • Page 65 67G can be blocked from 67G_Blk, the binary input. Activation of 67G_Blk input deactivates all outputs and resets internal timers. The start signals from the function can be blocked from 67G_Blk_Str, the binary input. The operate signals from the function can be blocked from 67G_Blk_Op, the binary input. PRS-7367...

  • Page 66: Application Scope

    The Stage i Operation Enable/Disable 67Gi_Alm_Ena The Stage i Alarm Enable/Disable 67Gi_Reset_T 0.000 -60.000 0.001 0.02 The Stage i Reset time delay The Stage i Zero sequence Self 67Gi_3Io_Calc_Ena Extraction Enable/Disable The Stage i Protection PTS Alm Block 67Gi_PTS_Blk enable/disable: PRS-7367...

  • Page 67: Switch Onto Fault Sotf

    Switch onto fault overcurrent protection is equipped in this equipment. Acceleration after tripping includes accelerated tripping for manual switching-onto-fault or automatic reclosing-onto-fault. Current settings and delays of the accelerated tripping protection can be configured independently. 3.6.1.1 Function Block The function block of the protection is as below. PRS-7367...

  • Page 68: Sotf Protection Principle

    All the modules in the diagram are explained in the next sections.  External Start This module is used for detecting a possible fault immediately after circuit breaker closing. The use of external protection function (typically the start-signal from a non-directional distance zone or PRS-7367...
  • Page 69 Figure 3.6-3 Dead-line detection logic diagram The dead-line detection should be used only when the voltage transformers are located on the line side of the circuit breaker. ： Where The SOTF_Init_Mod setting is used to configure the internal dead-line detection function. PRS-7367...
  • Page 70 Ic >SOTF_Cur_ Dead_ Line] Figure 3.6-4 SOTF detection logic diagram The purpose of this module is to detect the switch onto fault situation based on the current and voltage measurements. If the voltage, in any of the phases, is below the SOTF_Vol_Dead_Line PRS-7367...
  • Page 71 SOTF_Op_Mod = 3 SOTF_Blk Figure 3.6-6 Functional module diagram When the SOTF control module is active, the SOTF_Op_Mod setting defines the operation criteria for the detection of a switch-onto-fault condition. The detection can be based on the external start PRS-7367...

  • Page 72: Sotf Application Scope

    Mode of operation of SOTF Start Function: 1-3 for External Start SOTF_Op_Mod Current&Volta Signal Mode, Current&Voltage Mode, and Both Both DLD disabled Automatic switch onto fault Voltage initialization mode:0-3 for SOTF_ Init _Mod Current disabled , Voltage, Current, Current&Volta Current&Voltage PRS-7367...

  • Page 73: Circuit Breaker Failure Protection 50Bf

    3.7.1.1 Function Block The function block of the protection is as below. PRS-7367...

  • Page 74: 50Bf Protection Principle

    The Dead zone trip command of the backup CB CBF ALM The CB FAULT ALM output 3.7.2 50BF Protection Principle The breaker failure protection function can be enabled or disabled by setting the corresponding 50BF_Ena parameter values as "1" or "0". PRS-7367...
  • Page 75 3.7.2.1 Enable element 50BF_Ena Block & 50BF_Enable SI G SI G 50BF_ReTr_Ena 50BF_T1_Ena 50BF_T2_Ena 50BF_DeaZoneCtl 3.7.2.2 Start element 50BF_Chk_Mod=1 & Ia>50BF_Cur_Str Ib>50BF_Cur_Str Ic>50BF_Cur_St r I0>50BF_ResCur_Str & 50BF_CurResEna I2>50BF_NegCur_Str & 50BF_CurNegEna & 50BF_Chk_Mod=3 & 50BF_CBFState CB_Close & 50BF_Chk_Mod=2 & 50BF_Chk_Mod=4 PRS-7367...
  • Page 76 Once the start logic is activated(50BF_ExtStr1=1), 50BF can be reset only after the 50BF_CBF State return and last for 50BF_Max_T, the 50BF_Max_T is the max value of the duration of the 50BF_ReTr_T, 50BF_Op_T1, 50BF_BFTrBu_T and 50BF_Max_T settings, the default value of 50BF_Max_T is 150ms. PRS-7367...
  • Page 77 50BF_Retrp signal. The retrip logic only be used before the external mechanical equipment has checked the CB is failure, it means that if the status is happened after the 50BF_CBF=1 and last for 50BF_Fault_T, the retrip logic will be blocked. A typical setting of 50BF_Retrip_T is 0...50 ms. PRS-7367...
  • Page 78 50BF_BFTrBu_Ena=1, if the 50BF_CBFState =1, also the 50BF_ExtStr1 and last for time delay 50BF_BFTrBu_T; or the 50BF_ExtStr1=1, the 50BF_CBF signal is 1 and last for 50BF_Fault_T, the BF trip2 logic is met. A typical setting of 50BF_BFTrBu_T is 90...150 ms. PRS-7367...
  • Page 79 50BF_DeaOp_T, the 50BF_DZTrOp signal will be sent. A typical setting of 50BF_DeaOp_T is 90...150 ms. 3.7.2.7 Breaker Failure Alarm Logic 50BF_Enable & 51BF_CBFault_T 50BF_CBF Alm 50BF_CBF Figure 3.7-7 CBF Alarm logic PRS-7367...
  • Page 80 ), which is the time between activating the trip command for CBOpen the circuit breaker trip coil and CB reaching the open position • Reset time (t ) of current detection, which is the time between the moment when the circuit BF_Reset PRS-7367...

  • Page 81: 50Bf Application Scope

    0.01 Operating phase current 0.04 – 20.00 50BF_ResCur_Str 0.01 Operating residual current 0.04 – 20.00 50BF_NegCur_Str 0.01 Operating negative current 0.04 – 20.00 50BF_DeaCur_Str 0.01 Operating Dead zone current 50BF_CBFault_T 0.00 - 60.00 0.01 Time delay of circuit breaker PRS-7367...

  • Page 82: Three-Phase Thermal Overload Protection 49F

    If the temperature continues to increase to the maximum allowed temperature value, the protection issues a trip signal to the protected line. 3.8.1.1 Function Block The function block of the protection is as below. PTTR_49F Clr_Therm Figure 3.8-1 Function block PRS-7367...

  • Page 83: Protection Principle

    49F_K_Tr, the 49F_Str output is activated. Whereas,   I (k*I ) is smaller than the set value of 49F_K_Tr, the 49F_Str output is deactivated. The final temperature rise is calculated from the highest of the three-phase currents according to PRS-7367...

  • Page 84: Application Scope

    3.8.3 49F Application Scope If any sudden change in electrical power system, its directly impact to the operating factors of value likes current and voltage. In such a case, if the current level of transmission line increases to PRS-7367...

  • Page 85: Settings

    3.9.1.1 Function Block The function block of the protection is as below. PRS-7367...

  • Page 86: Protection Principle

    46D_Ena parameter values as "1" or "0". The phase discontinuity protection can be described by using a module diagram. All the modules in the diagram are explained in the next sections. The initiation logic diagram is shown as below: PRS-7367...

  • Page 87: Application Scope

    46D is a three-phase protection with DT characteristic, designed for detecting broken conductors in distribution and sub transmission networks. The function is applicable for both overhead lines PRS-7367...

  • Page 88: Settings

    Due to the small negative sequence reactance even small voltage asymmetries lead to large negative sequence currents. 3.10.1.1 Function Block The function block of the protection is as below. PRS-7367...

  • Page 89: Protection Principle

    The measured negative-sequence current is compared to the set 46N_Cur_Str value. If the measured value exceeds the set 46N_Cur_Str, the level detector activates the timer module. If the 46N_Ena_Mult input is active, the set 46N_Cur_Str, is multiplied by the set 46N_Mult_Cur_Str. PRS-7367...
  • Page 90 IDMT curve, but always at least the value of the 46N_Min_Op_T setting. The binary input 46N_Blk can be used to block the function. The activation of the 46N_Blk input deactivates all outputs and resets internal timers. The binary input 46N_Blk_Str can be used to PRS-7367...

  • Page 91: Application Scope

    0.000 -60.000 0.001 60.000 IDMT curves 46N_Reset_T Selection of reset curve type 0.01In 46N_Ena 0.04-20.00In Operation Enable/Disable 3.11 Three-phase overvoltage protection 59 3.11.1 59 Overview This relay provides a two-stage of overvoltage protection with definite time (DT) or inverse definite PRS-7367...
  • Page 92 This is the start signal of phase A Str_B This is the start signal of phase B Str_ C This is the start signal of phase C. This is the integrated operation signal. Op_A This is the operation signal of phase A PRS-7367...

  • Page 93: Protection Principle

    59_Str output and the corresponding output of the respective phases (59_Str_A/B/C). Where: The 59_Vol_Select setting is used for selecting phase-to-earth (59_Vol_Select=1) or phase-to-phase(59_Vol_Select=2) voltages for protection. 59_Vol_Str is the preset value to check for the voltage PRS-7367...

  • Page 94: Application Scope

    Therefore, it is essential to provide power frequency overvoltage protection in the form of time delayed element, either IDMT or DT. 3.11.4 59 Settings In the following table, i is the protection stage number, it can be set according to the requirements. PRS-7367...

  • Page 95: Positive Sequence Overvoltage Protection 59P

    The Stage i 59 alarm/ 59 operate 3.12 Positive sequence overvoltage protection 59P 3.12.1 59P Overview This relay provides a one-stage positive sequence overvoltage protection with definite time delay characteristics. 3.12.1.1 Function Block The function block of the protection is as below. PRS-7367...

  • Page 96: Protection Principle

    30ms & 59P_Op 59P_Blk_Op=1 Figure 3.12-2 Functional module diagram The calculated positive-sequence voltage is compared to the set 59P_Vol_Str setting. If the value exceeds the set 59P_Vol_Str and no block signal is activated, the timer and 59P_Str signal are PRS-7367...

  • Page 97: Application Scope

    The residual voltage can be calculated internally based on the measurement of the three-phase voltage. This voltage can also be measured by a single-phase voltage transformer, located between a transformer star point and earth, or by using an open-delta connection of three single-phase voltage transformers. PRS-7367...

  • Page 98: Protection Principle

    The residual voltage sample method is determined by 59G_U0_Calc, if 59G_U0_Calc =0, the voltage is sample from external terminal, if 59G_U0_Calc = 1, the voltage is calculated by three phases voltage. The operation of residual overvoltage protection can be described by using a module diagram. All PRS-7367...

  • Page 99: Application Scope

    Therefore, this function is often used as a backup protection or as a release signal for the feeder earth-fault protection. The protection can also be used for the earth-fault protection of generators and motors and for the unbalance protection of capacitor banks. PRS-7367...

  • Page 100: Settings

    However, when an unbalance situation occurs on the primary system, the negative sequence voltage is produced. 3.14.1.1 Function Block The function block of the protection is as below. Blk_Op Blk_Str Figure 3.14-1 Function block 3.14.1.2 Signals Table 3.14-1 Input Signals Signal Description PRS-7367...

  • Page 101: Protection Principle

    The binary input 59N_Blk can be used to block the function. The activation of the BLOCK input deactivates all outputs and resets internal timers. The binary input 59N_Blk_Str can be used to block the start signals. The binary input 59N_Blk_Op can be used to block the operation signals. PRS-7367...

  • Page 102: Application Scope

    The three-phase under voltage protection function is used to disconnect from the network devices, for example electric motors, which are damaged when subjected to service under low voltage conditions. It includes a settable value for the detection of under voltage either in a single phase, two phases or three phases. PRS-7367...

  • Page 103: Protection Principle

    The function can be enabled and disabled with the Operation setting. The corresponding parameter values are "On" and "Off". The operation of 27 can be described using a module diagram. All the modules in the diagram are explained in the next sections. PRS-7367...
  • Page 104 Start value. If the three phase voltages are lower than the set value of the voltage, the relay will initial. 3.15.2.2 Timer element The functional module diagram is shown as below: PRS-7367...

  • Page 105: Application Scope

    27_i_Ena Enable/Disable 27 alarm / 27 27_i_Alm_Ena operate The voltage start 27_i_Vol_Str 1.00 -120.00 0.01 value The time delay of 27_i_Op_T 0.04 - 120.00 0.01 0.04 definite time The current 27_i_Cur_Blk_Ena block criterion disable/enable 27_i_Cur_Blk 0.04-20.00In 0.01In The current PRS-7367...

  • Page 106: Positive Sequence Under Voltage Protection 27P

    The voltage magnitude in all the three phases This signal blocks all the binary output signals of the function Blk_Str This signal blocks all the start outputs of the function Blk_Op This signal blocks all the trip signals of the function. PRS-7367...

  • Page 107: Protection Principle

    30ms. The binary input 27P_Blk can be used to block the function. The activation of the 27P_Blk input deactivates all outputs and resets internal timers. The binary input 27P_Blk_Str can be used to PRS-7367...

  • Page 108: Application Scope

    27P_Vol_Blk_Ena Enable Internal Blocking 27P_Ena Operation Enable/Disable 3.17 Under voltage protection CUB_27 3.17.1 CUB_27 Overview The under voltage protection function CUB_27 is used to disconnect capacitor from the system when the voltage of capacitor is less than setting value. PRS-7367...

  • Page 109: Cub_27 Protection Principle

    The function can be enabled and disabled with the Operation setting. The corresponding parameter values are "On" and "Off". The operation of CUB_27 can be described using a module diagram. All the modules in the diagram are explained in the next sections. PRS-7367...

  • Page 110: Cub_27 Application Scope

    30ms. 3.17.3 CUB_27 Application Scope CUB_27 relay is applied to capacitors. The capacitor may have residual voltage after cutting off power. During restoring period, the capacitor may withstand overvoltage due to residual voltage, which will damage the capacitor. PRS-7367...

  • Page 111: Cub_27 Settings

    The calculation of the frequency is based on the voltage sampled values. 3.18.1.1 Function Block The function block of the protection is as below. Figure 3.18-1 Function block 3.18.1.2 Signals PRS-7367...

  • Page 112: Protection Principle

    81O_Op_T is the operate time setting of the 81O. The time characteristic is according to DT. When the operation timer has reached the value set by 81O_Op_T, the OPERATE output is activated. If the frequency becomes normal before the module operates, the operation resets after 30ms. PRS-7367...

  • Page 113: Application Scope

    The feeder relay provides a five-stage under frequency protection with independent definite time delay characteristics, and each stage has the same protection logics. The calculation of the frequency is based on the voltage sampled values. Four cycles of the voltage sampled values are fixedly adopted for the frequency calculation. PRS-7367...

  • Page 114: 81Urs Protection Principle

    81URS_Ena parameter values as "1" or "0". The operation of under frequency protection can be described by using a module diagram. All the modules in the diagram are explained in the next sections. The functional module diagram is shown as below: PRS-7367...

  • Page 115: 81Urs Application Scope

    The frequency dips rapidly, resulting in load shedding either by the load shedding relays or by the operator action. 81URS detects such situations and provides an output signal suitable for load PRS-7367...

  • Page 116: 81Urs Settings

    The under frequency protection will operate and disconnect load from the power system. After the frequency recovers to normal level, the disconnected load will be restored by using the under frequency restore protection. The calculation of the frequency is based on the voltage sampled values. PRS-7367...

  • Page 117: 81Ure Protection Principle

    All the modules in the diagram are explained in the next sections. The functional module diagram is shown as below: 81URE_Ena=1 81URS_Op 81URE_Str 81URE_Valid_T & Fr>81URE_Fr_Str 81URE_Op_T & 81URE_Op 30ms MinUpp<81URE_Vol_Blk f>(fn+20)Hz or f<(fn-20)Hz ≥1 81URE_Blk=1 Figure 3.20-2 Functional module diagram PRS-7367...

  • Page 118: 81Ure Application Scope

    Table 3.20-3 81URE settings Name Values(Range) Unit Step Default Description Start frequency setting value, this 81URE_Fr_ 30.00-50.00 at Fn=50; 0.01 48.80 value should be larger than 40.00-60.00 at Fn=60 81URSi_Fr_Str (i=1,2,3,4) 81URE_Op_ 0.04 - 200.00 0.01 0.04 Operate time delay PRS-7367...

  • Page 119: Frequency Gradient Protection 81R

    Signal Description This is the integrated start signal. This is the integrated operation signal. 3.21.2 81R Protection Principle The frequency gradient protection function can be enabled or disabled by setting the corresponding 81R_Ena parameter values as "1" or "0". PRS-7367...

  • Page 120: Application Scope

    The frequency gradient is often used in combination with a low frequency signal, especially in smaller power systems where the loss of a fairly large generator requires quick remedial actions to secure the power system's integrity. PRS-7367...

  • Page 121: Settings

    The reclaim time should be set long enough to allow this relay to operate when the circuit breaker is automatically closed onto a fault. PRS-7367...
  • Page 122 ,and also the ready status will be clear and AR NotServ BO will be active. Binary input signal to reset auto-recloser. If the logic setting 79AR_AutoRst =0, ResetAR the lockout AR only can be reset by this input. PRS-7367...

  • Page 123: Operation Principle

    AR function. 3.22.2.1 Enable AR (AR ON) AR function can be enabled by internal logic settings of AR mode or external signal via binary inputs in addition to internal logic setting 79AR_Enable. When the setting 79AR_ExtCtrl is set as PRS-7367...
  • Page 124 400ms or CB_Healthy become 0 from 1 and last for 200ms, AR_Ready will drop off and AR_NotServ BO will be initialized. When auto-reclose is blocked, AR ready will be drop off immediately and next auto-reclosing will PRS-7367...
  • Page 125 AR initiated by CB State The setting 79AR_CBStr is available for selection that 79AR is initiated by CB state. When 79AR is ready to reclose, 79AR will be initiated if circuit breaker is open and corresponding phase current is nil (IA/B/C/3I0D≤0.05In). PRS-7367...
  • Page 126 79AR_T_Reclaim, the AR indicates a successful reclosing and resets into "ready" status. If the protection trips again during the setting 79AR_T_Reclaim, the sequence advances to the next shot. If all reclosing attempts have been PRS-7367...
  • Page 127 High speed 1st sho t AR 79AR_OP 79AR_Inprog1 79AR_T_Dead TimeH 79AR_InprogX 79AR_OP 79AR_T_Dead TimeX & 25SYN_Chk_OK 79AR_Chk_Fail & 79AR_T_WaitSyn / 0 79AR_OP 0 / 79AR_T_Pulse & 79AR_CloseCB 79AR_Trip 79AR_CloseCB 79AR_WaitNext 0/79AR_T_WaitNext 79AR_Reclaim 79AR_CloseCB 0/79AR_T_Reclaim Clear 79AR_InprogX 79AR_Succl 79AR_RUN_Circle_N Figure 3.22-7 79AR Pulse and Reset PRS-7367...
  • Page 128 AR is failure, so AR can be ready only after releasing lockout and the ready conditions are met again. If 79AR_UnsucBlk=0, AR ready will reset but not lockout when AR is failure, so AR will be ready without releasing lockout after the ready conditions are met. PRS-7367...
  • Page 129 Lockout: 79AR_LockoutAR=1, or the signal 79AR_Unsuccl = 1 and the setting 79AR_UnsucBlk = & 79AR_Reset 79AR_LockoutAR 79AR_Chk_Fail 79AR_Lockout 79AR_Trip/TripH 79AR_T_TrFali/ 0 79AR_UnsucclLockout 79AR_UnsucclCB & 79AR_UnsucBlk Figure 3.22-9 Lockout conditions When BI 79AR_BlockAR=1, or AR is in lockout, the 79AR_Blocked BO is active. PRS-7367...
  • Page 130 AR is insensitive to initiation commands. it can be released from the lockout state if all blocked signals disappear (such as 79AR_LockoutAR BI=0) in the following ways: • The function is reset through by 79AR_ResetAR BI manually or locally control. • If the setting 79AR_AutoRst=1, the lockout is automatically reset after the reclaim time. PRS-7367...
  • Page 131 For the first shot, if AR is activated by input 79AR_TripH, the dead time is 79AR_T_DeadTimeH without synchro check. If the AR cannot reclose during the 79AR_T_Unsuc, the AR Unsuccl BO will be active, the inprog1 BO will be returned. The Reclaim and Unsuccl BO are active until after the 79AR_T_Reclaim is issued. PRS-7367...
  • Page 132 After the dead time, the synchronism check will be judge, the AR will send reclose command if the synchronism check is ok during 79AR_T_WaitSyn, otherwise the AR will be unsuccessful. If the AR reclose during the 79AR_T_Unsuc, the AR Succl BO will be active and Inprog1 will be returned. PRS-7367...
  • Page 133 BO will be active. When the next reclose command is issued, the last reclaim time will be end, the next progress will begin. When AR is active, the 79AR_BlkInstTr BO is active until 79AR_Active is returned. PRS-7367...

  • Page 134: Settings

    79AR_ExtCtrl 0 ~1 0: only logic setting 1: logic setting and external input signal Enabling/disabling 79AR be initiated by open state of circuit breaker (three phase) 79AR_CBStr 0 ~1 0: disable 1: enable Enabling/disabling 79AR Block 79AR_BlkInstPro 0 ~1 PRS-7367...

  • Page 135: Synchronism Check 25Syn

    79AR_T_Reclaim 0.10~900.00 0.01 Reclaim time Maximum wait time for circuit breaker 79AR_T_Unsuc 0.05~10.00 0.01 closing before indicating unsuccessful 3.23 Synchronism check 25SYN 3.23.1 Overview The synchronization checking function 25SYN ensures that the grid can be merged at the right PRS-7367...
  • Page 136 Block signal of synchro check function for AR SynChkBlk Block signal of synchronism check for AR DdChkBlk Block signal of dead charge check for AR CB_Open Normally closed contact of circuit breaker Table 3.23-2 25SYN Output Signals Signal Description PRS-7367...

  • Page 137: Operation Principle

    The output is only given if all measured quantities are simultaneously within their set limits. 3.23.2.1 Synchronization Voltage Selection 3.23.2.2 Dead Charge Check Logic The bus/line dead criterion is: U<25SYN_Vol_Dd Where: PRS-7367...

  • Page 138: Logic

    When the voltage is higher than 25SYN_Vol_Lv, the bus/line is regarded as live. When the voltage is lower than 25SYN_Vol_Dd, the bus/line is regarded as dead. PRS-7367...
  • Page 139 25SYN_UV, it is regarded that the synchronism check conditions are met. 25SYN_Syn 25SYN_Vol_Diff_OK 25SYN_SynChk_OK & & 25SYN_T_SynChk / 0 25SYN_Fr_Diff_OK 25SYN_Ang_Diff_OK 25SYN_SynChk_Blk 25SYN_Blk Uref> 25SYN_OV Uref< 25SYN_UV Usyn> 25SYN_OV Usyn< 25SYN_UV fref> 25SYN_OF fref< 25SYN_UF fsyn> 25SYN_OF fsyn< 25SYN_UF Figure 3.23-2 Logic Diagram of Synchronism check PRS-7367...

  • Page 140: Settings

    Threshold of under frequency for 25SYN_UF 0~65 0.01 synchronism blocking 25SYN_Vol_Dd 0.01~110.00 0.01 Voltage threshold of dead check 25SYN_Vol_Lv 0.01~110.00 0.01 Voltage threshold of live check Phase difference limit of synchronism 25SYN_Ang_Diff 2~ 89 0.01 check for 79AR PRS-7367...

  • Page 141: Current Unbalance Protection 51Na

    The operation time characteristics can be selected to be either definite time (DT) or inverse definite minimum time (IDMT). 3.24.1.1 Function Block The function block of the protection is as below. 51 NA BlkStr BlkOp EnaMult Figure 3.24-1 Function block PRS-7367...

  • Page 142: 51Na Protection Principle

    All the modules in the diagram are explained in the next sections. 3.24.2.1 Initiation logic The initiation of neutral current unbalance protection can be described by using a module diagram. The functional module diagram is shown as below: the unbalance current I_UNB is sampled in device by Ia2 current. PRS-7367...
  • Page 143 (OCR_INR) is connected to the Ena_Mult input by Three phase inrush function OCR_INR. 3.24.2.2 Timer element The functional module diagram is shown as below: 51NA_BLK_STR=1 & 51NA_STR 51NA_BLK=1 & Timer Initiation & 51NA_OP 51NA_BLK_OP=1 Figure 3.24-4 Functional module diagram PRS-7367...

  • Page 144: 51Na Application Scope

    Table 3.24-3 51NA settings Name Range Unit Step Default Description 51NA_i_Cur_Str 0.04-20.00In 0.01In 0.04In Start current value Multiplier current start 51NA_i_Mult_Cur 0.8 - 10.0 value Definite time IEC Normal inverse IEC Very inverse IEC Extremely 51NA_i_Curve_Type inverse IEC Long-time inverse Programmable user-defined PRS-7367...

  • Page 145: Three Phase Current Unbalance Protection 51Nt

    The function block of the protection is as below. 51NT StrA StrB StrC BlkStr BlkOp EnaMult Figure 3.25-1 Function block 3.25.1.2 Signals Table 3.25-1 Input Signals Signal Description The current magnitude in all the three phases This signal blocks all the binary output signals of the function PRS-7367...

  • Page 146: 51Nt Protection Principle

    The protection function can be enabled or disabled by setting the corresponding 51NT_Ena as "1" or "0". The operation of the three phase unbalance protection can be described using a module diagram. All the modules in the diagram are explained in the next sections. PRS-7367...
  • Page 147 51NT_Str_Ph_Num is the Number of phases required for activation. NOTICE! Do not set the multiplier setting 51NT_Mult_Cur higher than necessary. If the value is too high, the function may not operate at all during an inrush followed by a fault, no matter how severe the fault is. PRS-7367...

  • Page 148: 51Nt Application Scope

    Normally, the capacitor units are designed to withstand 110% of the nominal voltage continuously. When an element inside a capacitor bank fails, the remaining healthy elements experience an increase in voltage across them. If the voltage exceeds 110% of the nominal voltage, it can lead to PRS-7367...

  • Page 149: 51Nt Settings

    3.26 Voltage unbalance protection 59NA 3.26.1 59NA Overview The voltage unbalance function 59NA monitors voltage unbalance conditions in power transmission and distribution networks. It can be applied to identify a network and load unbalance that can cause sustained voltage unbalance. PRS-7367...

  • Page 150: 59Na Protection Principle

    3.26.2 59NA Protection Principle A standard Double-Y-connected shunt capacitor bank configuration is shown in following diagram. The fundamental frequency component of an unbalance voltage is measured on the common neutral connecting the two balanced parts of a shunt capacitor bank. PRS-7367...
  • Page 151 59NA_Vol_Str and no block signal is activated, the timer and 59NA_Str signal are activated. Where: 59NA_Ena is used to enable or disable the protection. 59NA_Vol_Str is the start value. 3.26.2.2 Timer element The functional module diagram is shown as below: PRS-7367...

  • Page 152: 59Na Application Scope

    3.26.4 59NA Settings Table 3.26-3 59na settings Values Name Unit Step Default Description （Range） 0.00 -100.00 0.01 3.00 59NA_Vol_Str Residual voltage start value 59NA_Op_T 0.04 - 300.00 0.01 0.04 Operate delay time 59NA_Ena Operation Enable/Disable 59NA_Alm_Ena Alarm Enable/Disable PRS-7367...

  • Page 153: Three Phase Voltage Unbalance Protection 59Nt

    This is the integrated start signal. This is the integrated operation signal. This is the integrated alarm signal. 3.27.2 59NT Protection Principle A standard Y-connected shunt capacitor bank configuration is shown in following diagram. The three-phase unbalance voltage is measured. PRS-7367...
  • Page 154 The time characteristic is according to DT. When the operation timer has reached the value set by 59NT_Op_T, the 59NT_Op output is activated. If the fault disappears before the module operates, the operation will reset with a time delay of 30 ms. PRS-7367...

  • Page 155: 59Nt Application Scope

    Description （Range） 59NT_Vol_Str 0.00 -100.00 0.01 3.00 Voltage start value 59NT_Op_T 0.04 - 300.00 0.01 0.04 Operate delay time 59NT_Ena Operation Enable/Disable 59NT_Alm_Ena Alarm Enable/Disable 3.28 Fault locator 21FL 3.28.1 21FL Overview 3.28.1.1 Function Block Figure 3.28-1The function block PRS-7367...

  • Page 156: 21Fl Protection Principle

    Phase A to B UAB/(IA-IB) 21FL_SELA=0, 21FL_SELB=1, 21FL_SELC=1 Phase B to C UBC/(IB-IC) 21FL_SELA=1, 21FL_SELB=0, 21FL_SELC=1 Phase C to A UCA/(IC-IA) 21FL_SELA=1, 21FL_SELB=1, 21FL_SELC=1 Three phase UBC/(IB-IC) For phase overcurrent protection, if the TriggA/B/C are invalid, the 21FL protection can be PRS-7367...

  • Page 157: 21Fl Application Scope

    The main objective of line protection and monitoring terminals is fast, selective and reliable operation for faults on a protected line section. Besides this, information on the distance to fault is very important for those involved in operation and maintenance. Reliable information on the fault PRS-7367...

  • Page 158: 21Fl Settings

    This function contains a blocking functionality. It is possible to block the function outputs, timer or the function itself, if desired. 3.29.1.1 Function Block The function block of the protection is as below. Block Figure 3.29-1 Function block 3.29.1.2 Signals Table 3.29-1 Input Signals Signal Description PRS-7367...

  • Page 159: Protection Principle

    32R_Op_T is the operate time setting; 32R_Dir can switch the operation mode. 32R_Dir = 1 is recommended, which means the system is operating in forward mode. On the contrary, 32R_Dir = 0 means the system is operating in reverse mode. PRS-7367...
  • Page 160 IV． When 32R_StrAng = 270° , the operation condition is: Q > 32R_StrVal; V． When 0° <32R_StrAng<90° OR 90° <32R_StrAng<180° , the operation condition is: Q < K*P-K*P0; VI． When 180° <32R_StrAng<270° OR 270° <32R_StrAng<360° , the operation condition is: Q > K*P-K*P0; Where: PRS-7367...
  • Page 161 Figure 3.29-4 Forward active overpower characteristics and forward reactive overpower characteristics Non Operating Area Operating Operating Area Area Operating Area Figure 3.29-5 Reverse active overpower characteristics and reverse reactive overpower characteristics If there is no block signal is activated, the timer and 32R_Str signal are activated. PRS-7367...

  • Page 162: Application Scope

    This function contains a blocking functionality. It is possible to block the function outputs, timer or the function itself, if desired. 3.30.1.1 Function Block The function block of the protection is as below. Block Figure 3.30-1 Function block PRS-7367...

  • Page 163: Protection Principle

    -32_Pwr_Str; And then if there is no block signal is activated, the timer and 32_Str signal are activated. Where: 32_Ena can enable or disable the 32 protection; 32_StrVal is the power startup setting; PRS-7367...

  • Page 164: Application Scope

    The function is used to select one voltage between two bus voltages or two line voltages when there is no external selection. The selection result depends on the type of system configuration. 3.31.1.1 Function Block The function block of the protection is as below. PRS-7367...
  • Page 165 Line2 voltage are valid, and Bus1 or Line1 voltage will be BothAct selected. It means neither Bus1 nor Bus2 voltage, or neither Line1 VoltageLoss nor Line2 voltage transformer fuse failed. It means the position is invalid. Invalid It means the position of CBs are error. BIErr PRS-7367...

  • Page 166: Protection Principle

    & Sel2 & CB_Close2 CB_Close1 BothAct & CB_Close2 CB_Open1 VoltageLos s & CB_Open2 CB_Open1 & CB_Close1 CB_Open1 & CB_Close1 BIErr 30s / 0s CB_Open2 & CB_Close2 CB_Open2 & CB_Close2 CB_Close1 CB_Close2 Invalid CB_Open1 & CB_Open2 Figure 3.31-2 Voltage sample PRS-7367...

  • Page 167: Application Scope

    3.32.1 Overview This relay provides a one-stage mechanical protection with definite time delay characteristics. 3.32.1.1 Function Block The function block of the protection is as below. MECH_PROT Mech_BI Figure 3.32-1 Function block 3.32.1.2 Signals Table 3.32-1 Input Signals Signal Description PRS-7367...

  • Page 168: Protection Principle

    The binary input MP_Blk can be used to block the function. The activation of the MP_Blk input deactivates all outputs and resets internal timers. Where: MP_Op_Ena is used to control the output of mechanical protection. Mp_T is the time delay of mechanical protection. PRS-7367...

  • Page 169: Application Scope

    IEC Extremely inverse 80.0 IEC Long-time inverse 120.0 Programmable user-defined If the Curve_Type = 1, 2, 3, 4, the Curve type is IEC Inverse-time mode and the time duration can be calculated according to the formula:     Where: PRS-7367...
  • Page 170 The operation is activated after the operation timer has reached the calculated time value. If a drop-off situation happens, that is, a fault suddenly disappears before the operate delay is exceeded, the operation will reset after the reset time is exceeded. PRS-7367...

  • Page 171: Cb Position

    3.34.1 Overview Backup power automatic switching mainly applies to circumstances where single-busbar stage of single-ended substation, for example, stage backup power automatic switching at load side of main transformer and bridge backup power automatic switching at power supply side. PRS-7367...
  • Page 172 The operation process of BPAS2 is tripping CB02 and closing CB01 when busbar 1 and 2 are in dead voltage status. Backup power automatic switching of busbar has two operation modes, Backup power automatic switching of busbar 1 (BPAS3) and backup power automatic switching of busbar 2 PRS-7367...

  • Page 173: Operation Principle

    15s discharge condition. All of the bus phase to phase voltages UAB, UBC and UCA are greater than [Busbar voltage setting value]. Generally used in the charging conditions of the bus voltage condition judgment. PRS-7367...
  • Page 174 3) "Incoming line live voltage” means someone phase voltage (or line voltage) is greater than incoming line live voltage setting value. If there's no incoming line PT on site, incoming line normal voltage criterion could be disabled through L1_Vol_Ena and L2_Vol_Ena respectively. PRS-7367...
  • Page 175 CT three-phase line-break of operational power supply. Figure 3.34-5 Diagram of incoming line dead current logic 3.34.2.2 Backup power automatic switching of incoming line 1 (BPAS1) Discharge Conditions The logic diagram of the discharge condition of BPAS1 is shown in Figure 3.34-6. PRS-7367...
  • Page 176 Operation breakers are in error status, that means the current at one phase of incoming line of operational power supply is more than incoming line no-current setting value, although the operation breakers are open. The logic diagram of CB position error is shown in Figure 3.34-7; PRS-7367...
  • Page 177 L2_Vol_Ena=0 L2_Live_Vol Figure 3.34-8 Diagram of the charge condition of BPAS1 The charge conditions of BPAS1 and BPAS2 are similar, so take BPAS1 for example. The charge conditions of BPAS1 cover the following items: No blocking condition, discharge condition; PRS-7367...
  • Page 178 Intertrip_Ena is “Enable”. Once CB01 fails to operate within 5s after the release of “BPAS Trip CB01” signal, terminate BPAS1 logic and discharge BPAS1, and then the device would send “BPAS trip CB fail” signal; PRS-7367...
  • Page 179 CB02_Aft_Cls CB03_Aft_Cls BPAS_Blk Trans01_Op BPAS2_DisCharge CB02_Pos_Err CB03_Pos_Err L1_Vol_Ena=1 & L1_Live_Vol CB01_Open BPAS2_Trip_Fail BPAS2_Close_Fail BPAS2_Success Figure 3.34-10 Diagram of the discharge condition of BPAS2 Charge Conditions The logic diagrams of the charge condition of BPAS2 is shown in Figure 3.34-11. PRS-7367...
  • Page 180 & & BPAS2_Close_Fail BPAS2_Trip_Success & BPAS2_Success CB01_Open Figure 3.34-12 Diagram of the operation process of BPAS2 3.34.2.4 Backup power automatic switching of busbar 1 (BPAS3) The logic diagram of the discharge condition of BPAS is shown in Figure 3.34-13. PRS-7367...
  • Page 181 Backup breaker is not in backup status, that means backup breaker has been closed; The time period during which both of operation power supplies do not meet live-voltage condition is longer than 15s. The logic diagram of busbar voltage loss is shown in Figure 3.34-14; PRS-7367...
  • Page 182 4) CB01 and CB02 are in after-close status. If there's no CB after-close binary inputs, the criterion could be disabled through setting CB_Aft_Cls_Ena. Both busbar 1 and busbar 2 are in good condition, i.e. meeting live voltage condition; Backup power automatic switching does not operate unless the device is charged for 15s PRS-7367...
  • Page 183 Countermand “BPAS Close CB03” signal and send “BPAS success” after CB03 is confirmed to have been closed. Once CB03 fails to operate within 5s after the release of “BPAS Close CB03” signal, terminate logic and discharge BPAS3, and then the device would give “BPAS Close CB fail” signal. PRS-7367...
  • Page 184 BPAS3_Ena=1 BPAS_Ena CB01_Open & BPAS4_Chg_Ok & CB02_Open CB03_Open CB_Aft_Cls_Ena=0 CB01_Aft_Cls & CB02_Aft_Cls AND_Bus1_Live_Vol & AND_Bus2_Live_Vol Figure 3.34-18 Diagram of the charge condition of BPAS4 Operation Process The diagrams of the operation process of BPAS4 is shown in Figure 3.34-19. PRS-7367...

  • Page 185: Application Scope

    Current of section breaker Voltage of Bus2 switching device Current of Line2 Voltage of Line2 Figure 3.34-20 The typical application configuration of backup power automatic switching device Backup power supply cannot be put into service unless operational power supply is actually PRS-7367...

  • Page 186: Settings

    30.00 Time delay for CB01 closing CB02_Trip_T 0.01 - 30.00 0.01 30.00 Time delay for CB02 tripping CB02_Close_T 0.01 - 30.00 0.01 30.00 Time delay for CB02 closing CB03_Close_T 0.01 - 30.00 0.01 30.00 Time delay for CB03 closing PRS-7367...

  • Page 187: Trip Logic 94T

    All relay tripping BO will return when Block is 1.  Lockout Type: The relay tripping BO can be connected to external Lockout relay.  Pulse type: The relay tripping BO pulse is fixed to time delay with setting 94Ti_PulseTime, the PRS-7367...
  • Page 188 1s. Ia<0.05In Ib<0.05In 94T_NoCur & Ic<0.05In Figure 3.35-2 The No current condition 94T_ModeOutput=1 & 94T_LockOut 94T_TripOut 0 / 94T_PulseTim e 94T_TripOut & & 94T_TripClear OnDelay / 0 94T_TripIn Figure 3.35-3 The 94T tripping and Lockout BO PRS-7367...
  • Page 189 94T_NoCur 94T_SteadyType=1 & 94T_CB_Opn 94T_TripOut & 1S / 0 94T_TripClear OffDelay / 0 94T_CB_Opn & 94T_NoCur 94T_SteadyType=2 94T_SteadyType=3 94T_NoCur & 94T_CB_Opn 94T_ModeOutput=1 94T_TripIn & 94T_Reset 94T_ModeOutput=2 & 94T_TripOut 94T_PulseTim e / 0 Figure 3.35-4 The 94T tripping BO return PRS-7367...

  • Page 190: Application Scope

    In the following table, i is the protection stage number, it can be set according to the requirements. Values Name Unit Step Default Description （Range） 94Ti_ModeOutput BO mode： 0: Steady type 0 - 2 1: Lockout type 2: Pulsed type 94Ti_SteadyType Return modes of steady type 0 - 3 0：no current PRS-7367...

  • Page 191: Close Logic

    The operation of close logic can be described by using a module diagram. All the modules in the diagram are explained in the next sections.  Lockout Type: The relay closing BO can be connected to external Lockout relay.  Steady type PRS-7367...
  • Page 192 0 / 100ms CloseOut & & CloseClear OnDelay / 0 CloseIn Figure 3.36-3 The closing and Lockout BO ModeOutput=0 CloseIn Current & CB_Cls CloseClear CloseOut OffDelay / 0 1S / 0 ModeOutput=1 CloseIn & Reset Figure 3.36-4 The closing BO return PRS-7367...

  • Page 193: Application Scope

    Figure 3.37-1 The overcurrent relay inrush function block 3.37.2 Protection Principle The inrush detection function can be used to selectively block overcurrent and earth fault function stages when the ratio of second harmonic component over the fundamental component exceeds the set value. PRS-7367...

  • Page 194: Application Scope

    Transformer protections require high stability to avoid tripping during magnetizing inrush conditions. A typical example of an inrush detector application is doubling the start value of an overcurrent protection during inrush detection Other applications of this function include the detection of inrush in lines connected to a transformer. PRS-7367...

  • Page 195: Settings

    OCR_INRi_Ena 0: Disable 0 - 1 1: Enable OCR_INRi_HarmCoe The ratio setting for second Harmonic Current to 0.05-1 0.001 fundamental current OCR_INRi_Op_T 0.02 - 60.00 0.01 0.02 Operate time delay OCR_INRi_Reset_T 0 - 60.00 0.01 0.02 Reset time delay PRS-7367...

  • Page 196: Wattmetric Sensitive Earth-Fault Protection Sef

    This signal blocks all the start outputs of the function Blk_Op This signal blocks all the trip signals of the function. when the signal RCA_CTL=1, the Characteristic angle setting RCA_CTL should be adding -90˚. Ena_MultCur This signal enables the current multiplier. PRS-7367...

  • Page 197: Protection Principle

    Figure 3.38-1 Directional Initiation Logic The evaluation of the forward directionality is according to the equation: j RCA       90 ( CorAng) arg 90 ( CorAng) The evaluation of the backward directionality is according to the equation: PRS-7367...
  • Page 198 Φ=Angle between the Polarising Voltage (-Ures) and the Residual Current(Ires) RCA=Relay Characteristic Angle Setting Ures=Residual Voltage Ires= Residual Current Uo=Zero Sequence Voltage Io= Zero Sequence Current  Initiation logic The initiation logic diagram of the protection is as below: PRS-7367...
  • Page 199 * Pr t= arg Pcal Where: T = Operation time in seconds k = Setting value of Timer multiplier Pref= Setting value of Reference power Pcal=Caculated residule power The operation type can be set to trip or alarm by setting. PRS-7367...

  • Page 200: Application Scope

    The minimum operation current SEF_StrPwr 0.1~400 0.01 0.173 The operation power SEF_StrVol 0.02~160 0.01 The operation voltage SEF_StrCur 0.01~20In 0.01 The operation current SEF_CurMul The operation current multiple 0.1~10 value ° SEF_RCA 0~360 The Characteristic angle ° SEF_CorAng 0~10 Angle correction PRS-7367...

  • Page 201: Under Current Protection 37C

    This signal blocks all the start outputs of the function BlkOp This signal blocks all the trip signals of the function. The binary input from the auxiliary normally opened contact of BI52a circuit breaker Table 3.39-2 Output Signals Signal Description PRS-7367...

  • Page 202: Protection Principle

    (Power machinery over speed accident). In case of undercurrent fault, if the motor has not been started, it is not allowed to start. If the motor has been running, cut off the main circuit and stop the motor running immediately. PRS-7367...

  • Page 203: Settings

    Table 3.40-1 Input Signals Signal Description RlyStr Relay Start BI RlyOp Relay Operation BI BIEna Block Busbar Enable BI Blk1 Block 1 BI Blk2 Block 2 BI Table 3.40-2 Output Signals Signal Description BusBlk Busbar Block BO BusOp Busbar Operation Trip BO PRS-7367...

  • Page 204: Protection Principle

    Block conditions. For output, take the Block Busbar trip terminal trip to be low, take the adjacent sides of the Block Busbar trip to be low failure or dead zone trip, and the logical configuration is: PRS-7367...
  • Page 205 Busbar I feeder is satisfied. The logic is as follows: 1L1 OC Block 1L1 Chain Block & 1L1 Enable BusI Feeder OC Blk 1Lm OC Block 1Lm Chain Block & 1Lm Enable m=1~16 Figure 3.40-5 Bus I feeder OC Block PRS-7367...

  • Page 206: Application Scope

    The device provides two-stage Gap overcurrent and zero sequence overvoltage protection, which is used for transformer backup protection in ungrounded system. 3.41.1.1 Function Block The function block of the protection is as below. OCTG_GAP CBCls Block BlkStr BlkOp EnaMultCur PRS-7367...

  • Page 207: Protection Principle

    CT, and the open voltage of bus PT is used in the zero sequence overvoltage CT. BlkStr & GAP_ENBI & & 3U0D & CB_Close BLKOp Figure 3.41-1 Logic Diagram for Gap PRS-7367...

  • Page 208: Application Scope

    Earth Fault Protection (64REF) is dependently operate only fault current without any interference of load current. Notice! For the connection point of view of transformer delta connected winding must be earthed with earthing transformer and its electronically nominated between winding connection and current transformer. PRS-7367...

  • Page 209: Protection Principle

    Description 64REF_Str Start signal from 64REF 64REF_Op Operation signal from 64REF 64REF_CT_Satu CT Saturation signal of 64REF 64REF_CT_Fail CT fail singal of 64REF 64REF_I0Neu I0>B0×I Signal of 64REF 3.42.2 Protection Principle 3.42.2.1 Fault Detector REF's pickup criterion is: Where: PRS-7367...
  • Page 210 3.42.2.3 Calculate Differential and Restraint Current REF differential current and restraint current are calculated as the following formulas: Where: is the REF differential current; is the residual restraint current; is the residual current of the phase currents; 0Cal is the neutral measured current; 0Neu PRS-7367...
  • Page 211 Figure 3.42-1 REF principle diagram 3.42.2.4 Operation Criterion The operation criteria of REF protection are as follows: Where: 、 are respectively residual current of the   phase currents and neutral measured current. For this device, the ratio restrained coefficient fixedly takes 0.6. PRS-7367...
  • Page 212 3.42.2.7 CT Saturation Detection To prevent incorrect tripping of differential protection caused by CT saturation in case of external fault, CT saturation detection element of the device would judge the saturation of CT and determine whether to block relevant differential protection. PRS-7367...
  • Page 213 The negative-sequence current at this side is lower than threshold of CT line-break negative-sequence current (fixed value). Blocking of biased differential protection by CT circuit failure follows the following principle:  When “CTS_Blk_Ena” is set to “1”, REF protection would be blocked in case of CT circuit PRS-7367...

  • Page 214: Logic Diagram

    I0neu I_Cur_Str / 4 64REF_NPCur_Ena (I0d>64REF_Cur_Str) &(I0d>K*I0r) Figure 3.42-3 Logic diagram of restricted earth fault protection ： Where I0neu is the neutral measured residual current 3.42.4 Settings Table 3.42-3 Settings of restricted earth fault protection Values Name Unit Step Default Description (Range) PRS-7367...

  • Page 215: Transformer Current Circuit Supervision Tf Cts

    Therefore, the CT circuit failure alarm cannot be issued. The function is used to prompt the operator to check and confirm whether the CT is normal or not. The operation principle criteria of Current circuit supervision CT’s based on the following points:  Three phase zero-sequence current PRS-7367...
  • Page 216 Three-phase current inputs from one branch AnaAdd The add three current inputs from one side Block Block signal of CTS Table 3.43-2 CTS Output Signals Signal Description CTS _InstOp Instantaneous operation signal from CTS CTS _Op Time delay operation signal from CTS PRS-7367...

  • Page 217: Logic Diagram

    CT circuit failure judgment element using the following criterion: ： Where =0.08In: zero-sequence current =10V: zero-sequence voltage CT circuit failure will be deemed to have occurred once the situation that meets above-noted criterion lasting for 10s. PRS-7367...

  • Page 218: Transformer Fuse Failure Supervision Tf Vts

    3.44.1.1 Function Block VTS_Op VTS_Blk 3.44.1.2 Signals Table 3.44-1 VTS Input Signals Signal Description Three phase group signal for voltage inputs Negative voltage inputs VTS_Blk Block signal of VTS PRS-7367...

  • Page 219: Logic Diagram

    Detecting the phase difference between I0 and I2A When phase overcurrent element operates, pickup phase due to overcurrent is judged as a faulty phase. PRS-7367...

  • Page 220: Operation Principle

    For single-phase earth fault, I0 and I2 of faulty phase are in-phase. Earth fault start up zero sequence current can be set by setting LNP_ResCur_Str. For phase-to-phase earth fault, I0 and I2 of non-faulty phase are in-phase. In order to properly expand the ability of grounding distance relay to measure transition resistance, PRS-7367...

  • Page 221: Settings

    RCA is the relay characteristic angle. forward directionality and backward directionality can be set by setting LNP_PDIR_MOD. RCA is the setting LNP_PRCA. 3.45.3 Settings Name Values(Range) Unit Step Default Description PRS-7367...

  • Page 222: Stabilized Differential Protection For Machines 87Mpdif

    Op_A Blk_OpHS Op_B Blk_OpLS Op_C CT Sta Op_HS CT Blk Op_LS Blkd Blkd_A Blkd_B Blkd_C Figure 3.46-1 Function block 3.46.1.2 Signals Table 3.46-1 Input signal Signal Description The differential and biased current, including Ida, Idb, Idc, Ira, Irb, ID3P PRS-7367...

  • Page 223: Differential Current Off Limit Alarm

    Figure 3.46-2 The logic of differential current off limit alarm 3.46.3 Instantaneous high stage principle Instantaneous high stage of differential protection quickly operates in case of severe internal faults in the machine. The setting is set based on avoiding the maximum unbalanced current PRS-7367...

  • Page 224: Biased Low Stage Principle

    I I         （ ）  Where: Idl=87MP_DIF_Coe_Idl*Machine_Ie Table 3.46-3 Description of formula symbols formula Formula symbol symbol I  I   is the differential current， is biased current； denote the PRS-7367...
  • Page 225 End section 2; is the Biased low operate value, it is equal to Low operate value * Machine_Ie INST OPERATE DIFF OPERATE OPERATE Ir2>Ir1 Section1 Section2 Figure 3.46-4 Differential protection action characteristic curve (two sections) PRS-7367...

  • Page 226: Ct Supervision Block

    The Logic of Biased Low Stage differential protection Figure 3.46-6 3.46.5 CT Supervision Block CT disconnection judgment does not consider (1) simultaneous disconnection of three-phase CT and simultaneous disconnection of phase and neutral sides CT; (2) The fault and CT disconnection occur simultaneously. PRS-7367...

  • Page 227: Ct Saturation Blocking

    CT saturation determines the second harmonic, as detailed in Three phase inrush function OCR_INR. 3.46.7 Overall Logic 87MP_HS_StrA 87MP_LS_StrA 87MP_HS_StrB 87MP_Str SI G 87MP_LS_StrB 87MP_HS_StrC 87MP_LS_StrC The Logic of overall start up Figure 3.46-8 PRS-7367...

  • Page 228: Settings

    Figure 3.46-10 87MP_HS_BlkA 87MP_LS_BlkA 87MP_BlkA 87MP_HS_BlkB 87MP_BlkB 87MP_LS_BlkB 87MP_HS_BlkC 87MP_BlkC 87MP_LS_BlkC 87MP_Blk The Logic of Phase A/B/C and overall block Figure 3.46-11 3.46.8 Settings Name Values(Range) Unit Step Default Description 87MP_DIF_Ie 1~20In Machine Rated Current 87MP_DIF_Enable Machine Differential Protection PRS-7367...

  • Page 229: Flux-Balance Based Differential Protection 87Mfdif

    3.47.1.1 Function Block Figure 3.47-1 Function block 3.47.1.2 Signals Table 3.47-1 Input signal Signal Description ID3P The differential current, the default value is I3P2 Block This signal blocks all the binary output signals of the function PRS-7367...

  • Page 230: Principle

    Machine Flux Balance Differential 87MF_DIF_Coe_Id 0.05~4Ie 0.01Ie 0.05Ie Protection Operate value Machine Flux Balance Differential 87HF_DIF_Op_T 0.02 - 300.00 0.01 0.02 Protection operate time delay Machine Flux Balance Differential 87HF_DIF_Reset_T 0.00 - 60.00 0.01 0.02 Protection reset time delay PRS-7367...

  • Page 231: Machine Startup Mst

    The condition for determining voltage start is the process from dead voltage to live voltage; The criterion for determining current start is that there is no current to having current. Three judgment methods can be independently enabled. PRS-7367...

  • Page 232: Settings

    3.48.3 Settings Name Values(Range) Unit Step Default Description Circuit breaker position MST_EnaCBP Enable MST_EnaVol Voltage Enable MST_EnaCur Current Enable The machine startup time MST_T_MStr 0.00~60 0.02 delay MST_LiveVol 1.00~120 0.01 Live voltage setting MST_DeadVol 1.00~100 0.01 Dead voltage setting PRS-7367...

  • Page 233: Long Start Protection Mqds

    The long start protection starts timing when the motor starts and the maximum phase current reaches 0.1Ie. If the starting current exceeds the peak value within the [motor start time] and drops to within 1.2Ie, the long start protection returns. Otherwise, the long start protection will trip. PRS-7367...

  • Page 234: Settings

    3.50 The locked-rotor protection MDZS 3.50.1 Overview 3.50.1.1 Function Block MDZS MStr Figure 3.50-1 Function block 3.50.1.2 Signals Table 3.50-1 Input signal Signal Description The current magnitude in all the three phases MStr Machine Startup Signal Table 3.50-2 Output signal Signal Description PRS-7367...

  • Page 235: Principle

    MST_Str Ia>MDZS_Cur_Str MDZS_T_Op MDZS Op Ib>MDZS_Cur_Str Ic>MDZS_Cur_Str Figure 3.50-2 The locked-rotor protection logic 3.50.3 Settings Name Values(Range) Unit Step Default Description MDZS_Ena MDZS enable MDZS_Cur_Str 0.04~20In 0.01 20In MDZS current startup setting MDZS_T_Op 0.00~60 0.02 MDZS operating time delay PRS-7367...

  • Page 236: Synchronous Motor Loss Of Step 78O

    The out of step protection adopts the power factor angle criterion and the static stable impedance circle characteristic criterion. The protection only operates when both criteria are met, that is, the out of step protection action zone is the intersection of the two criteria action zones. PRS-7367...
  • Page 237 (Ia<0.06In and Ic<0.06In), no voltage blocking (Uca<10V), negative sequence current blocking (can be enabled/ disabled, sharing the same negative sequence current blocking element with loss of excitation protection, which is to automatically return after a 10 second delay). PRS-7367...

  • Page 238: Settings

    78O_Enable 78O_Enable 78O_Enable2 78O_Enable2 78O_EnaI2Blk 78O_EnaI2Blk 78O_EnaImpStd 78O_EnaImpStd 78O_I2Blk 0.04~20In 0.01 20In 78O_I2Blk 78O_Ang 0～60° ° 60° 78O_Ang Ω 99.99Ω 78O_MhoZaXd 0~99.99 0.01 78O_MhoZaXd Ω 99.99Ω 78O_MhoZbXs 0~99.99 0.01 78O_MhoZbXs 78O_T_Op 0~599.9 599.9s 78O_T_Op 78O_T_Op2 0~599.9 599.9s 78O_T_Op2 PRS-7367...

  • Page 239: Synchronous Motor Loss Of Excitation 40O

    The loss of excitation protection adopts the principle of asynchronous boundary condition impedance circle. The condition for the loss of excitation protection action is when the positive sequence impedance of the measuring machine end falls within the asynchronous boundary circle. The impedance characteristics are shown in the following figure: PRS-7367...
  • Page 240 (Ia1<0.06In and Ic1<0.06In), no voltage blocking (Uca<10V), negative sequence current blocking (can be on/off, and shares the same negative sequence current blocking element with out of step protection, which needs to automatically return after a 10 second delay). PRS-7367...

  • Page 241: Settings

    Figure 3.52-3 Logic diagram of synchronous motor loss of excitation protection 3.52.3 Settings Values(Ra Name Unit Step Default Description nge) 40O_Enable 40O_Enable 40O_EnaAlm 40O_EnaAlm 40O_EnaI2Blk 40O_EnaI2Blk 40O_EnaAng 40O_EnaAng 40O_I2Blk 0.04~20In 0.01 20In 40O_I2Blk Ω 99.99Ω 40O_MhoZaXd 0~99.99 0.01 40O_MhoZaXd Ω 99.99Ω 40O_MhoZbXs 0~99.99 0.01 40O_MhoZbXs 40O_T_Op 0~599.9 599.9s 40O_T_Op PRS-7367...

  • Page 242: Supervision Functions

    Alarm signal of external communication self-check If the relay device is in abnormal status, alarm signal will be issued. Some alarm signals will block the protection function, while some will not. The detailed information is shown as the following table. PRS-7367...

  • Page 243: Current Circuit Supervision Cts

    The main purpose of the current circuit supervision function is to detect faults in the secondary circuits of the current transformer and avoid influence on the operation of relevant protection functions. This current circuit supervision function will be in operation at any time, whether the general fault detection picks up or not. PRS-7367...

  • Page 244: Cts Operation Principle

    The current circuit supervision function can be enabled or disabled by setting the corresponding CTS_Ena parameter value as "1" or "0". The operation of current circuit supervision can be described by using a module diagram. All the modules in the diagram are explained in the next sections. PRS-7367...
  • Page 245 Op_Val =Set_value+0.2*I3P_max “CTS_3Io_Calc_Ena” is the signal to judge whether there is an external CT to measure the residual current; “CTS_Cur_Str” is the operation start current value; “I3P_max” is the max phase current of three phases;  Current circuit failure criteria PRS-7367...

  • Page 246: Cts Application Scope

    The fuse failure supervision feature is used to detect failure of the AC voltage input circuit of this relay. The fuse failure supervision logic in the relay is designed to detect the voltage failure and automatically adjust the configuration of protective elements whose stability would otherwise be compromised. A time delay alarm output is also available. PRS-7367...

  • Page 247: Pts Operation Principle

    The fuse failure supervision function can be enabled or disabled by setting the corresponding PTS_Ena parameter values as "1" or "0". The operation of the fuse failure supervision function can be described with a module diagram. All the modules in the diagram are explained in the next sections. PRS-7367...
  • Page 248 PTS_U2 value and the measured negative-sequence current is below the set PTS_I2 value. If the positive-sequence criterion or the negative-sequence criterion is fulfilled, VT_InsAlm output signal is activated instantly to block all the voltage-related functions. VT_Alm output signal is PRS-7367...

  • Page 249: Pts Application Scope

    Operate level of negative sequence PTS_U2 1-100 0.01 over-voltage PTS_NoUL 1-100 0.01 Operate level of line under voltage Operate level of negative sequence PTS_I2 0.04-20In 0.01 0.04 over-current PTS_Chk_Mod Check model of PT failure PTS_3PO_Reset_ 0-60 0.01 0.50 Reset time of 3-pole open PRS-7367...

  • Page 250: Trip Circuit Supervision Tcs

    The operation of trip circuit supervision can be described by using a module diagram. TCS_Ena=1 TCS_Op_T TCS_State=1 & TCS_Alm 200ms TCS_Blk=1 Figure 4.5-2 Functional module diagram The function starts when the TCS_STATE signal is 1, which means TCS detects a trip circuit failure. PRS-7367...

  • Page 251: Tcs Application Scope

    The separate trip circuit supervision relay is applicable for this to supervise the trip coil of the circuit breaker. 4.5.4 TCS Settings Table 4.5-3 TCS settings Name Values(Range) Unit Step Default Description TCS_Ena Operation Enable/Disable TCS_Op_T 0-100 0.01 Operate Delay Time PRS-7367...

  • Page 252: Monitoring & Control

    5.2.1.1 Function Block The function block of the protection is as below. Figure 5.2.1-5.2-1 Function block 5.2.1.2 Signals Table 5.2-1 Input Signals Signal Description bSN_Sync_BSFlg Input signal of block Sync function(includes PT break) PRS-7367...

  • Page 253: Syn Operation Principle

    When the voltage is higher than Sync_LINVOL, the bus/line is regarded as live. When the voltage is lower than Sync_NOVOL, the bus/line is regarded as dead. PRS-7367...
  • Page 254 SetSN_Sync_PHA value is from 0 to 2, the voltage is single-phase voltage (A/B/C) and SetSN_Sync_PHA value is from 3 to 5, the voltage is phase-to-phase voltage (AB, BC, CA). When sync phase is AB/BC/CA, bus dead-line condition: Uab/Ubc/Uca< (Sync_Vol /1.732). PRS-7367...
  • Page 255 [SetSN_Sync_RESETIME] period. This then prevents the functions from being maintained in operation by mistake for a long time waiting for the conditions to be fulfilled. Check Sync The logic diagram of is shown as below: PRS-7367...
  • Page 256 The frequency on both sides of the circuit breaker is also measured. It is also required that the difference in frequencies on both sides of the breaker must be below 0.05Hz. The CLSLOOP_OK output are activated when the actual measured conditions match the set PRS-7367...

  • Page 257: 25Syn Check Result

    Treset to T1. The condition is OK at the time of T1, but the remaining time T1 is less than the exit delay time( ). In this case, when the time of T1 is SetSN_Sync_TDelay over, the device will stop the exit logic and the synchro check is failure. PRS-7367...

  • Page 258: 25Syn Check Block

    The main and important application of the energizing check module is to reconnect dead network of power system (T/L or buses) with energized or working network of power system. PRS-7367...

  • Page 259: 25Syn Settings

    0 or 1 0: disable 1: enable Enabling/disabling dead line and live bus (DLLB) check 25SYNC_LBDL 0 or 1 0: disable 1: enable Enabling/disabling live line and dead bus (LLDB) check 25SYNC_DBLL 0 or 1 0: disable 1: enable PRS-7367...
  • Page 260 Voltage threshold of live check Phase difference limit of synchronism 25SYNC_ANG_DIF 1~ 180 0.01 check Voltage difference limit of 25SYNC_VOL_DIF 0.01~100.00 0.01 synchronism check Frequency difference limit of 25SYNC_FR_DIF 0.00~2.00 0.01 synchronism check Frequency change rate of 25SYNC_DFDT_DIF 0.00~2.00 0.01 synchronism check PRS-7367...

  • Page 261: Measurement

    The metering rate is 40 points per cycle. Different functions, such as controlling, monitoring and metering, use different measurement quantities, including the RMS value, the phase angle, the frequency, the harmonic content, the sequence components and so on. All these metering values PRS-7367...

  • Page 262: Settings

    Active/Reactive power calculated by two-meter method cos  The power factor can be calculated by P and Q as following formula: 5.3.3 Settings Table 5.3-1 Parameter Setting of AC Measure Quantity Name Range Unit Default Description Dead zone value of READ_ZONE 0~100% 0.2% PRS-7367...

  • Page 263: Binary Input

    5.4 Binary Input 5.4.1 Function Description PRS-7367 relay can collect BI signals, and each BI shall generate reflection records after undergoing optoelectronic isolation and software impulse filtering. Parameter setting of status signal quantity contains the following items: After the filter circuit and debouncing algorithm processing, external interference can be filtered effectively.

  • Page 264: Function Block

    For primary switchgear status, only the 2 status "01" and "10" indicates respectively the positions "Open" and "Close" are valid. Bit0=0 Bit0=1 Bit1 = 0 DPS_INT DPS_ON Bit1 = 1 DPS_OFF DPS_BAD 5.4.2 Function Block 5.4.3 I/O Signal Table 5.4-1 Description of Binary Input Input Signal Description OpenVal Double point of normally open PRS-7367...

  • Page 265: Binary Output

    PRS-7367 relay has flexible remote control and interlock which are applicable to various service. PRS-7367 relay is configured with 4 remote outputs by default. If more are needed, it can be configured according to the hardware situation.

  • Page 266: Function Block

    Name Unit Stage Default Description (Range) SetSN_PW_Opn 0.1~60 remote-control trip pulse width SetSN_PW_Cls 0.1~60 remote-control close pulse width dwSetSN_SelTm 0.1~60 Time period of selection operation dwSetSN_ExecTm 0.1~60 Time period of operate operation dwSetSN_DBIHold Time period of debouncing 0~10 0.02 PRS-7367...

  • Page 267: Interlocking Logic Output

    Some important technical terms of Interlocking functions are follow:  PRS-7367 relay is configured with 4 remote outputs by default. If more are needed, it can be configured according to the hardware situation. ...

  • Page 268: Functional Block

    The commands to an apparatus can be initiated from the local self-customized BI, the station HMI or the dispatching center. The local control self-customized BI can be configured on the PRS IED Studio. The control operation can be started by the activation of the corresponding BI signal. The PRS-7367...

  • Page 269: Signaling

    Achieve remote monitoring.  Transformer tap position input All hardware input denouncing time can be set separately. Denouncing time setting can be done through the LCD or PRS IED Studio software. PRS-7367...

  • Page 270: Event Records

    The IED provides self-check alarm information that reflects the external circuit such as analog error information (CT disconnection, PT disconnection, etc.) and abnormal information of primary switch state (abnormal trip position, trip signal long time input, etc.) The IED can store 512 latest time tagged alarm records. PRS-7367...

  • Page 271: Device Record

    When the state quantity input is GOOSE signal, the time tag of the state quantity adopts the external input source signal time tag, and GOOSE signal acquisition has no denouncing time. The IED can store 2000 latest SOE records. PRS-7367...

  • Page 272: Fault And Disturbance Recording

    4. Fault information Including faulty phase, fault location and protection elements 5.10.3 Waveform Recording Duration A fault waveform contains all analog and digital quantities related to IED such as currents, voltages, differential current, alarm elements, and binary inputs and etc. PRS-7367...

  • Page 273: Fault Wave Recording

    You can select any of the IED's analogue inputs as analogue channels to be recorded. You can also map any of the opto-inputs output contacts to the digital channels. In addition, you may also map a number of DDB signals such as Starts and LEDs to digital channels. PRS-7367...
  • Page 274 You may choose any of the digital channels to trigger the disturbance recorder on either a low to high or a high to low transition, via the Input Trigger cell. The default settings are such that any dedicated trip output contacts will trigger the recorder. The path to the configuration tool: [IED]->[Const]->[WAVEANA]/[WAVEKI]/[WAVEKO]->[Ana Channel]/[KI Channel]/[KO Channel]. PRS-7367...

  • Page 275: Hardware

    The specific modules can be configured flexibly according to the practical engineering demands. The overall hardware designing frame of this relay is shown as below. Figure 6.1-1 Hardware structure of this relay The following figures show the front panel and the rear panel of this device. PRS-7367...
  • Page 276 The hardware module configuration in the above figure is only for demonstrating one kind of typical configuration. Most often, the configuration has to be modified in most of the project. The hardware module configuration of a practical engineering should be modified based on the practical designing requirement. PRS-7367...

  • Page 277: Human Machine Interface Module

    PRS IED Studio configuration tool, which determine what information do they transmit between the CPU module and PWR module. The frame of all the power supply module terminal are shown below. PRS-7367...
  • Page 278 Table 6.3-1 Terminal Definition and Description of PWR Module Name Description POW+ Positive input of power supply for the device. POW- Negative input of power supply for the device. Dev_Err Common Device abnormality alarm common terminal. Dev_Err Cls Device abnormality alarm normal close terminal. PRS-7367...

  • Page 279: Main Cpu Module

     Auxiliary calculations Besides all the quantities mentioned above, the CPU module can also calculate the metering PRS-7367...
  • Page 280 RJ45 RJ45 RJ45 GP S+ GP S- GP S+ GP S- CGND CGND CGND CGND RS485D+ RS485D- RS485D+ RS485D- CGND CGND CGND CGND RS485E+ RS485E+ RS485E- RS485E- Figure 6.4-1 The frame of the CPU module terminal PRS-7367...

  • Page 281: Transformer Module

    NEVER allow the secondary side of the current transformer (CT) to be opened while the primary apparatus is energized. The opened CT secondary circuit will produce an extremely high voltage and high heat. Although the current terminal will be automatically short circuited when it is plugged out, the safety precaution should be PRS-7367...
  • Page 282 Table 6.5-2 Terminal Definition and Description of 8U+7I Module Name Description The three voltage input channels with inner star connection (Y) for protection and metering. The three voltage input channels with inner star connection (Y) for protection and metering. PRS-7367...

  • Page 283: Binary Input Module

    All the binary inputs can be visually and flexibly configured through the PRS IED Studio configuration tool, which determine what information do they transmit between the CPU module and BI module. The frame of the BI module terminal is described as below. PRS-7367...
  • Page 284 Table 6.6-1 Terminal Definition and Description of BI Module Name Description BI01+ BI02+ The No.1 and No.2 programmable binary input. BI01~ BI02- BI03+ BI04+ The No.3 and No.4 programmable binary input. BI03~ BI04- BI05+ The No.5programmable binary input. BI05- BI06+ The No.6 programmable binary input. PRS-7367...

  • Page 285: Binary Output Module

    All the binary outputs can be visually and flexibly configured through the PRS IED Studio configuration tool, which determine what information do they transmit between the CPU module and BO module. The frame of the BO module terminal is described as below. PRS-7367...
  • Page 286 BOi ( i=11~14 ) Cls is the normal close binary output. Table 6.7-2 Terminal Definition and Description of output module 2 Name Description BO01~16 The No.1 ~6 programmable tripping or closing binary output. PRS-7367...

  • Page 287: Binary Input/Output Module

    All the binary inputs and outputs can be visually and flexibly configured through the PRS IED Studio configuration tool, which determine what information do they transmit between the CPU module and BO module. The frame of the IO module terminal definition is described as below. PRS-7367...
  • Page 288 The No.1 and No.2 programmable binary input. BI01~ BI02- BI03+ BI04+ The No.3 and No.4 programmable binary input. BI03~ BI04- BI05+ The No.5programmable binary input. BI05- BI06+ The No.6 programmable binary input. BI06- BI07+ The No.7 programmable binary input. PRS-7367...
  • Page 289 Open is the normal open binary output. The No.6~7 programmable signal binary output. Normal open and close BO06~7 contacts are both equipped. BOi (i=6~7) Open is the normal open binary output, BOi (i=6~7) Cls is the normal close binary output. PRS-7367...

  • Page 290: Man Machine Interface

    In simple words, all functions of PRS-7367 are user friendly. 7.1.3 Operating panel keypad and keys The PRS-7367 relay front penal have 9 keypads and 8 function keys help the operator to change the device settings according to the required situation and locate the different kind of data access.

  • Page 291: Indication Of Led

    These LEDs can be configured through local HMI or PRS IED Studio. Additionally, sixteen LEDs shows 48 different alarming status. These LEDs may be triggered by a fault, alarm event or device record, and it indicate last information. PRS-7367...
  • Page 292 None of signal is energized when the functional key is deactivated. 19~22 Configurable These LEDs indicate the functional keys are deactivated and they Green/Yellow/Red can be configured according to user demand. None of signal is energized when the functional key is CB Close deactivated. PRS-7367...

  • Page 293: Configurable Keys

    This LED indication shows, when the circuit breaker is in close position. 7.1.5 Configurable keys The PRS-7367 device HMI front panel consists of four configurable keys. These configurable functional keys provide shortcuts for certain menu or act as a control button. The default view of configurable functional keys (F1, F2, F3 and F4) are shown in above figure 7.1.1.

  • Page 294: Lcd Display Description Of Hmi

    7.2.2 Normal display structure of LCD The normal operating condition of local HMI LCD display structure is shown below in figure 7.2-1， the single-line diagram is based on the practical arrangement of equipment, monitoring the position status of CB and Isolator in real time. PRS-7367...

  • Page 295: Main Menu Display

    7.2.3 Main menu display In order to make sure the user can control PRS-7367 relay easier, simple and fast, the CYG Co, Ltd designs a flat-panel of main menu LCD display that contain ten main controlling function. These controlling function are listed below:...

  • Page 296: Sub Menu Functions Of Main Menu

    This part of HMI, the detail of menu sub-functions is described. These all sub-functions display on the front panel of HMI LCD. 7.3.1 Physical Information In this section, describe all the physical information related to device software and device communication. The overview display of physical information is shown in below figure 7.3.1. PRS-7367...
  • Page 297 User can access this function through the following path: “Physical information > software”. The software information data divided into two pages and the detail of information is listed in below figure 7.3.2 and table 7.3.1: Software PRS-7367 Protection and Control Unit Device type : PRS-7367 P-Software ver.
  • Page 298 NET 3 IP 196.005.002.003 IP address of internet protocol for Ethernet port 3 NET 3 MAC 00.02.C4.05.02.03 MAC address of internet protocol for Ethernet port 3 NET 3 NetMask 255.255.255.000 NetMask address of internet protocol for Ethernet port 3 PRS-7367...

  • Page 299: Review Information

    Figure 7.3-5 Overview Display of Timing Mode 7.3.2.2 Prot Settings This section is divided into two sub-parts like setting group and protection settings. 1- Setting Group This sub-section the user can see the information about which group is the current group. There PRS-7367...

  • Page 300: Monitoring Information

    This section divided into three sub-parts and describe the information of real time monitoring data of PRS-7367 feeder protection relay. This section only provides the sample, harmonics and BI data information. In this section user can easily access the real-time monitoring data view of relay through arrow keys.
  • Page 301 Figure 7.3-8 Overview Display of Measurement Section Quantities 7.3.3.2 Harmonic In this section, the user can see the calculated harmonic content data list of all phase voltage and current and also the RMS value of all three phase voltage and current. User can access this PRS-7367...
  • Page 302 D-BI is stand for double binary input function. The D-BI display diagram of relay is listed in below figure 7.3.10 (b): D-BI TWYX_01 : 00 Reset Test TWYX_02 : 00 Remote TWYX_03 : 00 CB_Close TWYX_04 : 00 CB_Open Clr_THERM MCP_OPEN / Monitor / BI / Monitor / BI 0001 0001 0001 0004 PRS-7367...

  • Page 303: Event Information

    6. Shows slot info like management slot (slot3) or protection slot (slot9). 7. Shows fault number 8. Not reverted 9. Shows fault events page number information, it will be increase or decrease w.r.to numbers of fault. The diagram of fault event display of relay is listed in below figure 7.3.12: PRS-7367...
  • Page 304 Records”. The overview display of warning record is shown in below figure 7.3.13. Warning Records 2018-04-11 12:17:22.693ms TimingErr Phase FaultNO.:00001 Slot3 Not Reverted / Event / Alarm Records 0003 0022 Figure 7.3-13 Overview Diagram of Warning Records Info 2- Selfchk Info PRS-7367...
  • Page 305 The GOOSE signal acquisition has no denouncing time. User can access this function through the following path: “Event > SOE”. This device can save 1024 latest SOE records. The diagram of SOE record is shown in below figure 7.3.15. PRS-7367...
  • Page 306 Origin IP : 192.168.253.200 2018-04-16 18:08:32.180ms Channel : 000 Port 01 Parameters : DC Close Process : executive Succeed Origin IP : 192.168.253.200 / Event /Dev Logs 0001/0008 Figure 7.3-16 Overview Display Diagram of Remote Control Access 2- User Records PRS-7367...

  • Page 307: Record Information

    0003/0011 Figure 7.3-18 Overview Diagram of Power Records 7.3.5 Record Information In this section, user can see the disturbance records and this section is divided into one sub-section. The diagram of disturbance record is shown in below figure 7.3.18. PRS-7367...

  • Page 308: Setting Information

    In this section user can see the disturbance records of all the faults. User can access this function through the following path: “Disturbance Records > Fault Wave”. The diagram of faulty wave records is shown in below figure 7.3.20. Wave List No.01 PRS-7367 Feeder Protection_LD1_0_2018041 9_114735_518 No.02...
  • Page 309 “Setting > Set group”. The procedure of group setting change is explaining in below figure 7.3.22. Firstly, enter the device login password. Secondly, select group setting. Thirdly, download new configuring setting. Fourthly, cancel to return back or exit. PRS-7367...
  • Page 310 Set group”. The procedure detail of group setting copy is explaining in below figure 7.3.23. Grp Copy Maintenance possword Sorc Team: Dest Team: Cancel Copy Total groups / Setting / Set group / Setting / Set group Figure 7.3-23 Procedure Diagram of Group Setting Copy PRS-7367...

  • Page 311: Configuration Information

    Besides that, the monitoring and controlling authorization of different users (of different post) can also be modified. The diagram of configuration information is shown in below figure 7.3.25. PRS-7367...
  • Page 312 /Configuration /Time Figure 7.3-26 Diagram of (a) Date & Time Setting (b) Time Zone Setting 7.3.7.2 Authorization This part is divided into one sub-function. see figure 7.3.24. User can access this function through the following path: “Configuration > Authorization”. PRS-7367...
  • Page 313 Guest user account is only for visitors. In this section user Guest_1 have no rights to change or view any kind of configuration information. PRS-7367...

  • Page 314: Test Information

    IED is under maintenance. see below figure 7.3.29 (a): 2- Signal Test In this section user can simulate all kind of signal test like operation signal, alarm signal and signal reset. see below figure 7.3.29 (b): PRS-7367...
  • Page 315 Common test is divided into six sub-test like operation test, warning test, block test, SelfChk test, measure test and status test, etc. User can access this function through the following path: “Test > Comm Test”. The LCD overview display diagram of common test information of every tests is shown in below figure 7.3.30. PRS-7367...
  • Page 316 50BF, TCS, SOTF start and BI open or close etc. see above figure 7.3.30 (d): 7.3.8.3 Mandatory Wave In this section user can check the mandatory wave function. User can access this function through the following path: “Test > Mandatory wave”. After enter this section user can manually start PRS-7367...
  • Page 317 The clear record structure of LCD display is listed in below figure 7.3.32: Clear record Clr LED Clr RunRec Clr ActRec Clr AlmRec Clr Strart Clr SoeRec / Clear / Clear record 0001/0002 Figure 7.3-32 Diagram of Clear Record Display PRS-7367...
  • Page 318 Hindi, German and Russian etc. User can access this function through the following path: “Language > Language setting”. The language setting diagram of relay is listed in below figure 7.3.34: Language : English / Language / Language Figure 7.3-34 LCD Display diagram of Language Setting PRS-7367...
  • Page 319 You can set the setting group with binary inputs according to the following table: Table 8.3-1 Recording Time Settings KI_Grp1 setting group01 KI_Grp2 setting group02 KI_Grp3 setting group03 KI_Grp4 setting group04 The path to the configuration tool: [IED]->[Logic]->[PLAT]->[PUB_SetVal]. PRS-7367...
  • Page 320 It is recommended to use twisted screened eight-core cable as the communication cable. A picture is shown below. Figure 9.2-1 Ethernet communication cable 9.2.1.2 Ethernet Communication protocol Ethernet communication protocols are supported by the device including: IEC60870-5-103, PRP, RSTP, DNP3.0, IEC61850 etc. For more details about these communication protocols, see the correlative standards. PRS-7367...
  • Page 321 IEC 61850-7-4: Basic communication structure for substation and feeder equipment–  Compatible logical node classes and data classes IEC 61850-8-1: Specific Communication Service Mapping (SCSM) – Mappings to MMS (ISO  9506-1 and ISO 9506-2) and to ISO/IEC 8802-3 PRS-7367...
  • Page 322 GetNameList (read name list Logic node model directory) service) GetAllDataValues (read all data value) Read (read service) GetDataValues (read data value) Read (read service) SetDataValues (set data value) Write (write service) Data model GetVariableAccessAttribute GetDataDirectory (define read data) (read variable access attribute PRS-7367...
  • Page 323 ReadJournal (read log service) GetLogStatusValues (read log status values) Read (read service) GetGoCBValues (read GOOSE control block Read (read service) values) GOOSE SetGoCBValues (set GOOSE control block Write (write service) values) GSSE GetGsCBValues (read GSSE control block values) Read (read service) PRS-7367...
  • Page 324 The purpose to define and use SCL is that the description of intelligent electronic device capability and description of substation automation system can be exchanged in a compatible manner between the intelligent electronic device management tools and system configuration tools provided by different manufacturers. PRS-7367...
  • Page 325 PRS-7000 series devices usually configure data sets in advance in the ICD document, such as protection event, protection digital input and protection measurement. The SCT (system configuration tool) can also add, delete and modify data set configuration according to the needs of existing actual projects. PRS-7367...
  • Page 326 When an item is set as 1, the corresponding information will be embodied in the report. DatSet The name of the data set associated with the report control block and under the same LD. The members of this data set are monitored by this report control block. BufTm PRS-7367...
  • Page 327 PurgeBuf = TRUE. 9.4.3.3 GOOSE control block The fast messages of the PRS-7000 series device are transmitted via GOOSE, and the transmission characteristics of GOOSE is controlled by the GOOSE control block (GoCB). GoCB has the following important characteristics: PRS-7367...
  • Page 328 M: measurement and metering related logic nodes, such as MMXU P: protection function logic nodes, such as PDIF, PDIS, PTOC, PTRC R: protection related functional logic nodes, such as RREC, RBRF S: sensors, monitoring T: instrument transducer logic nodes, such as TVTR, TCTR PRS-7367...
  • Page 329 The performance of the logic node, represents the current performance status of the logic node. the value of the same Mod is read-only and cannot be modified. Health Health status, it reflects the status of the relevant software and hardware of the logic node. NamPlt The name plate of the logic node PRS-7367...
  • Page 330 This relay now supports 3 Ethernet clients and 2 serial port clients. Each client can be set the DNP related communication parameters respectively and be selected the user-defined communication table. The user can configure the user-defined communication table through the PRS IED Studio configuration tool auxiliary software. The object groups “Binary Input”, “Binary Output”, “Analog PRS-7367...
  • Page 331 Input”, “Binary Input” and “Analog Output”. The classes of the “Analog Input” and “Binary Input” can be defined by modifying relevant settings. In communication process, the DNP3.0 master can online modify the class of an “Analog Input” or a “Binary Input” through “Function Code 22” (Assign Class). PRS-7367...
  • Page 333 Therefore, be sure to fully comply with all warnings and cautions. 10.2.2 Safety Identification Examples For the various safety instructions given in the previous section, the following are examples 10.2.2.1 Warning Signs PRS-7367...
  • Page 334 Operation of the protective device without proper earthing may damage the protective device and the measuring circuit and may also cause an injuring accident. PRS-7367...

  • Page 335: Instrumentation And Meters Notice

    Studio software), the menu can be viewed one page at a time to display a full column of data and text. This PC software also allows settings to be entered more easily, saved to a file on disk for future reference or printed to produce a setting record. Refer to the PRS IED Studio Instruction PRS-7367...

  • Page 336: Operation Preparation

    The device mark inspection shall include the product type, name, manufacturer's name and trademark, date of manufacture and serial number, safety mark, etc., the mark and installation location shall be consistent with the design drawings. PRS-7367...

  • Page 337: Insulation Check

    These tests are performed for the following hardware to ensure that there is no hardware defect. Defects of hardware circuits other than the following can be detected by self-monitoring when the power supply is energized. • User interfaces test • Binary input circuits and output circuits test PRS-7367...

  • Page 338: With The Relay Energized

    For PPM, PPS time synchronization system, through the time synchronization binary input check. 10.6.3 Light Emitting Diodes (LEDs) The device has two lights that cannot be defined. the two lights are as follows: PRS-7367...

  • Page 339: Test The Ac Current Circuit

    The corresponding reading can then be checked in the relays menu. Table 10.6-1 Current channel checkout Group No. Item Input Value Input Angle Display Value Display Angle PRS-7367...

  • Page 340: Test The Ac Voltage Inputs

    The corresponding reading can then be checked in the relays menu. Table 10.6-2 Voltage channel checkout Group No. Item Input Value Input Angle Display Value Display Angle Three-phase voltage 1 Three-phase voltage 2 Three-phase voltage … Residual voltage 1 Residual voltage 2 Residual voltage … PRS-7367...

  • Page 341: Test The Binary Inputs

    "automatic" or "manual". When set to automatic printing, the device will print protection action event, self- checking information and other records initiatively in real time. 10.6.10 On-load Checks The objectives of the on-load checks are: • Confirm the external wiring to the current and voltage inputs is correct. PRS-7367...

  • Page 342: Final Checks

    If a test block is installed, remove the test plug and replace the cover so that the protection is put into service. Ensure that all event records, fault records, disturbance records and alarms have been cleared and LED’s has been reset before leaving the protection. Ensure that the protection has been restored to service. PRS-7367...

  • Page 343: Installation

    Always store and ship the electronic boards in their original packing. Place electronic parts in electrostatic screened packing materials. 11.3 Checking the Shipment Vehicles, trains, ships and all other means of transport are available, but to prevent snow and rain, PRS-7367...

  • Page 344: Material And Tools Required

    Visually inspect all the material when unpacking it. When there is evidence of transport damage, lodge a claim immediately in writing with the last carrier and notify the nearest CYG SUNRI CO., LTD. Company or agent.  Unpacking and checking procedures 1.

  • Page 345: Device Location And Ambient Conditions

    The current/ voltage connector structure is in the same size, and can be expanded, combined flexibly. Installation hole size as below. Attention! It is necessary to leave enough space top and bottom of the cut-out in the cubicle for heat emission of this relay. PRS-7367...
  • Page 346 DC voltage power supply wiring power +, power - should be distinguish in different colors, for example power + (brown), power - (blue). Power supply, binary inputs & outputs: stranded conductor, 1.0mm ~ 2.5mm AC voltage inputs: stranded conductor, 1.5mm PRS-7367...
  • Page 347 15 cm and the glass optical fiber is 25 cm. To use the cable clamp, a loose buffer sleeve should be used. When connecting or removing the optical fiber, please take hold of the connection ends. Do PRS-7367...
  • Page 348 Rx: receive signal input Tx: transmit signal output Sc: shielded (grounding) connection 11.8 Installation check 11.8.1 Check the installation Check that all terminal screws with external wiring are tightened, the wiring is neat, and all wiring labels are clearly defined. PRS-7367...
  • Page 349 1 minute. The "HEALTHY" indicator lights up when the unit starts up normally. If a fault is detected during the startup procedure, the "ALARM" indicator is lit and the internal fault code, alarm information can be checked via LEDs. PRS-7367...
  • Page 351  Check whether the device has obvious physical fault  If you can find a clear physical fault point of the device, please contact CYG for repair or replacement Confirm the scope of the fault PRS-7367...
  • Page 352  Carry out the input and output test for the relay device by test instrument.  If it is determined that the fault belongs to the relay device, please contact CYG for repair or replacement 12.3.2 Software Failure Check whether the hardware is in trouble or not according to the device alarm signal.
  • Page 353 When removing and replacing modules, it is best to use the label in the chassis as an indicator, so as to make sure each module is installed in the proper slot. PRS-7367...
  • Page 355 Decommissioning and Disposal NOTICE! Strictly observe all local and national regulations when disposing of the device. PRS-7367...
  • Page 357 Ethernet Port. Update the logic of 81URS and 27; update the alarm 2.08 2.09 1.20 2019-6-12 enable setting of 59/59G/27. Update AR return time delay when CB healthy=0 2.09 2.10 1.20 2019-6-27 and CB_Close=0. Add The frame of the CPU PRS-7367...
  • Page 358 Update PT/CT Burden. Add Check Sync & Check Loop communication method of 25SYNC. Update the CBF Logic Setting Description to be same as the setting table; Update Backup power automatic switch discharge description and logic errors. Add over/under/reverse power protection. PRS-7367...
  • Page 359 Update BPAS Bus_Loss_Vol condition is not meet live-voltage. Update Figure 6.1-3. Update BPAS Overview: modify under voltage to live voltage. Updater the Transformer Module description about 7U8I and 8U7I. Update OC_VCE setting name; Update Overview Display Diagram of Software PRS-7367...
  • Page 360 2.13 1.20 2023-10-24 Accuracy. Update the sample points to be 40; Update the maximum number of tagged records to be 36; Add machine protection function list in chapter1.2. Update Protection Function, add MDZS code. Update Waveform Recording Duration description. PRS-7367...

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