Areva MiCOM P125 Technical Manual
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Areva MiCOM P125 Technical Manual

Directional/non-directional relay
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MiCOM
P125/P126/P127
Directional/Non-directional
Relay
Technical Guide
P12Y/EN T/E32

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Summary of Contents for Areva MiCOM P125

  • Page 1 MiCOM P125/P126/P127 Directional/Non-directional Relay Technical Guide P12Y/EN T/E32...
  • Page 3 Technical Guide P12y/EN T/E32 MiCOM P125/P126 & P127 Page 1/2 MiCOM P125/P126 & P127 Directional/Non-directional Relay CONTENT Safety Section Pxxxx/EN SS/B11 Getting Started P12y/EN GS/D32 Handling, Installation and Case Dimensions P12y/EN IN/C22 User Guide P12y/EN FT/D32 Technical Data and Curve Characteristics...
  • Page 4 P12y/EN T/E32 Technical Guide Page 2/2 MiCOM P125/P126 & P127 BLANK PAGE...
  • Page 5 Pxxxx/EN SS/B11 SAFETY SECTION...

  • Page 7: Table Of Contents

    Pxxxx/EN SS/B11 Safety Section Page 1/10 CONTENTS INTRODUCTION HEALTH AND SAFETY SYMBOLS AND EXTERNAL LABELS ON THE EQUIPMENT Symbols Labels INSTALLING, COMMISSIONING AND SERVICING DECOMMISSIONING AND DISPOSAL EQUIPMENT WHICH INCLUDES ELECTROMECHANICAL ELEMENTS TECHNICAL SPECIFICATIONS FOR SAFETY Protective fuse rating Protective Class Installation Category Environment CE MARKING...
  • Page 8 Pxxxx/EN SS/B11 Page 2/10 Safety Section BLANK PAGE...

  • Page 9: Introduction

    Documentation for equipment ordered from AREVA Energy Automation & Information is despatched separately from manufactured goods and may not be received at the same time.

  • Page 10: Symbols And External Labels On The Equipment

    Pxxxx/EN SS/B11 Page 4/10 Safety Section SYMBOLS AND EXTERNAL LABELS ON THE EQUIPMENT For safety reasons the following symbols and external labels, which may be used on the equipment or referred to in the equipment documentation, should be understood before the equipment is installed or commissioned.
  • Page 11 Pxxxx/EN SS/B11 Safety Section Page 5/10 Protection Class I Equipment Before energising the equipment it must be earthed using the protective conductor terminal, if provided, or the appropriate termination of the supply plug in the case of plug connected equipment. The protective conductor (earth) connection must not be removed since the protection against electric shock provided by the equipment would be lost.
  • Page 12 Pxxxx/EN SS/B11 Page 6/10 Safety Section External resistors, including voltage dependent resistors (VDRs) Where external resistors, including voltage dependent resistors (VDRs), are fitted to the equipment, these may present a risk of electric shock or burns, if touched. Battery replacement Where internal batteries are fitted they should be replaced with the recommended type and be installed with the correct polarity to avoid possible damage to the equipment, buildings and persons.

  • Page 13: Decommissioning And Disposal

    Pxxxx/EN SS/B11 Safety Section Page 7/10 DECOMMISSIONING AND DISPOSAL Decommissioning: The supply input (auxiliary) for the equipment may include capacitors across the supply or to earth. To avoid electric shock or energy hazards, after completely isolating the supplies to the equipment (both poles of any dc supply), the capacitors should be safely discharged via the external terminals prior to decommissioning.

  • Page 14: Environment

    Pxxxx/EN SS/B11 Page 8/10 Safety Section Environment The equipment is intended for indoor installation and use only. If it is required for use in an outdoor environment then it must be mounted in a specific cabinet or housing which will enable it to meet the requirements of IEC 60529 with the classification of degree of protection IP54 (dust and splashing water protected).

  • Page 15: Recognized And Listed Marks For North America

    Pxxxx/EN SS/B11 Safety Section Page 9/10 RECOGNIZED AND LISTED MARKS FOR NORTH AMERICA CSA - Canadian Standards Association - Underwriters Laboratory of America – UL Recognized to UL (USA) requirements – UL Recognized to UL (USA) and CSA (Canada) requirements –...
  • Page 16 Pxxxx/EN SS/B11 Page 10/10 Safety Section BLANK PAGE...
  • Page 17 Getting Started P12y/EN GS/D32 MiCOM P125/P126 & P127 GETTING STARTED...
  • Page 19 Electrostatic Discharge (ESD) HANDLING OF ELECTRONIC EQUIPMENT RELAY MOUNTING UNPACKING STORAGE USE OF THIS SECTION INTRODUCTION TO THE MICOM RANGE GENERAL ON MICOM P125, P126 & P127 MiCOM P125, P126 & P127 RELAY DESCRIPTION Relay Overview Front Panel Description 9.2.1 Relay Identification 9.2.2...
  • Page 20 P12y/EN GS/D32 Getting Started Page 2/48 MiCOM P125/P126 & P127 DEFAULT SETTINGS AND SETTING RANGE DESCRIPTION REAR TERMINAL BLOCK FOR P125, P126 & P127 14.1 Description Rear Terminal Block for P125 14.2 Description Rear Terminal Block for P126 & P127 LOCAL CONNECTION TO A PC 15.1...

  • Page 21: General Considerations

    Upon receipt, relays should be examined immediately to ensure no damage has been sustained in transit. If damage has been sustained during transit a claim should be made to the transport contractor and AREVA T&D Protection & Control should be promptly notified.

  • Page 22: Handling Of Electronic Equipment

    P12y/EN GS/D32 Getting Started Page 4/48 MiCOM P125/P126 & P127 HANDLING OF ELECTRONIC EQUIPMENT The normal movements of a person can easily generate electrostatic potentials of several thousand volts. Discharge of these voltages into semiconductor devices when handling electronic circuits can cause serious damage, which often may not be immediately apparent but the reliability of the circuit will have been reduced.

  • Page 23: Relay Mounting

    Getting Started P12y/EN GS/D32 MiCOM P125/P126 & P127 Page 5/48 RELAY MOUNTING Relays are dispatched either individually or as part of a panel or rack assembly. If a MMLG test block is to be included it should be positioned at the right-hand side of the assembly (viewed from the front).

  • Page 24: Introduction To The Micom Range

    INTRODUCTION TO THE MiCOM RANGE MiCOM is a comprehensive solution capable of meeting all electricity supply requirements. It comprises of a range of components, systems and services from AREVA T&D . Flexibility is central to the MiCOM concept. MiCOM provides the ability to define an application solution and, through extensive communication capabilities, to integrate this solution with your power supply control system.

  • Page 25: General On Micom

    P125, P126 & P127 relays can also provide back-up protection for HV and EHV transmission systems. MiCOM P125, P126 & P127 The MiCOM P125, P126 & P127 relays are based on the successful K, MODN and MX3 range. Each relay includes a large number of protection and control functions for most demanding applications.

  • Page 26: Relay Description

    P12y/EN GS/D32 Getting Started Page 8/48 MiCOM P125/P126 & P127 RELAY DESCRIPTION Relay Overview The next figures show the P125 and P127 (P126) relays. P125 P127 (P126) As can be seen in above figures the case width dimensions differ between the P125 and the P127 (P126).

  • Page 27: Front Panel Description

    Alarm LED: Orange LED L2, labelled Alarm, indicates that an alarm has been registered by MiCOM P125, P126 & P127 relays. The alarms are either threshold crossings (instantaneous) or tripping orders (time delayed). The LED will flash...

  • Page 28: Relay Identification

    Page 10/48 MiCOM P125/P126 & P127 Warning LED: Orange LED L3, labelled Warning, is dedicated to the internal alarms of MiCOM P125, P126 & P127 relays. When a "non critical" internal alarm (i.e. a communication fault) is detected, the LED flashes continuously.

  • Page 29: Battery And Communication Port

    Getting Started P12y/EN GS/D32 MiCOM P125/P126 & P127 Page 11/48 9.2.2 Battery and Communication Port Under the bottom hinged cover of the relay there is a battery compartment to hold the ½AA size battery, which is used for memory back-up to store event, fault and disturbance records (P126 &...

  • Page 30: Withdrawing Module From Case

    P12y/EN GS/D32 Getting Started Page 12/48 MiCOM P125/P126 & P127 Withdrawing Module from Case The withdrawal of the MiCOM module active part (chassis) from its case is achieved by inserting a 3mm screwdriver into a hole situated under the upper hinged cover above the LCD, and turning the lock pin 90°...

  • Page 31: Main Functions

    Getting Started P12y/EN GS/D32 MiCOM P125/P126 & P127 Page 13/48 Main Functions The following table shows the functions available with the models. MODELS and FUNCTIONS MiCOM MiCOM MiCOM FUNCTIONS ANSI CODE P125 P126 P127 Directional/non-directional earth fault 67N/50N/51N Directional/non-directional three phase...

  • Page 32: Overwiew Directional Protection Functions

    P12y/EN GS/D32 Getting Started Page 14/48 MiCOM P125/P126 & P127 OVERWIEW DIRECTIONAL PROTECTION FUNCTIONS The directional overcurrent and directional earth fault protection functions provide the setting current thresholds, torque angle and tripping zone. The tripping zone for the directional protection function is shown in the drawing.

  • Page 33: Energising The Relay

    Getting Started P12y/EN GS/D32 MiCOM P125/P126 & P127 Page 15/48 ENERGISING THE RELAY To energise the relay correctly, follow the following instructions carefully. 11.1 System Connections Check the wiring scheme of your installation. Check that the contacts of output relay RL1 are included in your trip circuit.

  • Page 34: Menu Structure

    12.3 Access to the Menu Before the initial operation of the MiCOM P125, P126 or P127 relay, some of the parameter settings must be checked or modified. Lift the upper and lower hinged covers and remove the transparent cover over the front panel.

  • Page 35: Password Entry

    Getting Started P12y/EN GS/D32 MiCOM P125/P126 & P127 Page 17/48 12.3.2 Password Entry When entry of a password is required the following prompt will appear: A flashing cursor will indicate which character field of the password may be entered. The password entry is made character by character using Password ! "...

  • Page 36: Default Settings And Setting Range

    P12y/EN GS/D32 Getting Started Page 18/48 MiCOM P125/P126 & P127 DEFAULT SETTINGS AND SETTING RANGE When the relay is delivered from the factory, the parameter are set to default values and stored in the non-volatile memory. Following tables show default setting values for functions and protection elements of the P125, P126 &...
  • Page 37 Getting Started P12y/EN GS/D32 MiCOM P125/P126 & P127 Page 19/48 DEFAULT VALUE Setting Range P125 P126 P127 Mode Min Step tIA> Yes/No tIB> Yes/No tIC> Yes/No Ie> Yes/No tIe> Yes/No Ie>> Yes/No tIe>> Yes/No Ie>>> Yes/No tIe>>> Yes/No Pe/IeCos> Yes/No tPe/IeCos>...
  • Page 38 P12y/EN GS/D32 Getting Started Page 20/48 MiCOM P125/P126 & P127 DEFAULT VALUE Setting Range P125 P126 P127 Mode Min Step tAux2 Yes/No t SOTF Yes/No Led 6 I> Yes/No tI> Yes/No I>> Yes/No tI>> Yes/No I>>> Yes/No tI>>> Yes/No tIA>...
  • Page 39 Getting Started P12y/EN GS/D32 MiCOM P125/P126 & P127 Page 21/48 DEFAULT VALUE Setting Range P125 P126 P127 Mode Min Step Input2 Yes/No Input3 Yes/No Input4 Yes/No Input5 Yes/No Input6 Yes/No Input7 Yes/No Recloser Run Yes/No Recl. Blocked Yes/No tAux1 Yes/No...
  • Page 40 P12y/EN GS/D32 Getting Started Page 22/48 MiCOM P125/P126 & P127 DEFAULT VALUE Setting Range P125 P126 P127 Mode Min Step tU>> Yes/No U< Yes/No tU< Yes/No U<< Yes/No tU<< Yes/No Ue>>>> Yes/No tUe>>>> Yes/No Brkn. Cond Yes/No CB Fail Yes/No...
  • Page 41 Getting Started P12y/EN GS/D32 MiCOM P125/P126 & P127 Page 23/48 DEFAULT VALUE Setting Range P125 P126 P127 Mode Min Step tI2>> Yes/No I2>>> Yes/No tI2>>> Yes/No Therm Trip Yes/No I< Yes/No tI< Yes/No U> Yes/No tU> Yes/No U>> Yes/No tU>>...
  • Page 42 P12y/EN GS/D32 Getting Started Page 24/48 MiCOM P125/P126 & P127 DEFAULT VALUE Setting Range P125 P126 P127 Mode Min Step Alarms Inst. Self-reset Yes/No Reset Led on Fault. Yes/No Battery Alarm. Yes/No Rel. Maintenance . Rel. Maintenance . Yes/No Relays Cmd.
  • Page 43 Getting Started P12y/EN GS/D32 MiCOM P125/P126 & P127 Page 25/48 DEFAULT VALUE Setting Range P125 P126 P127 Mode Min Step I>>> ? No or Yes or DIR or Peak I>>> 40 In 0.5 In 40 In 0.01 In tI>>> 150s 0.01s...
  • Page 44 P12y/EN GS/D32 Getting Started Page 26/48 MiCOM P125/P126 & P127 DEFAULT VALUE Setting Range P125 P126 P127 Mode Min Step Low sensitivity Cortec code P12-A-X---X Current input from 0.1to 40 Ien Ie> 25 Ien 25 Ien 25 Ien 0.1 Ien 25 Ien 0.01 Ien...
  • Page 45 Getting Started P12y/EN GS/D32 MiCOM P125/P126 & P127 Page 27/48 DEFAULT VALUE Setting Range P125 P126 P127 Mode Min Step ±85° ±85° ±85° ±10° ±170° Ie>>> Trip zone 1° Ie>>> tReset 0 .04 s 0.04 s 0.04 s 0.0 s 100 s 0.01 s...
  • Page 46 P12y/EN GS/D32 Getting Started Page 28/48 MiCOM P125/P126 & P127 DEFAULT VALUE Setting Range P125 P126 P127 Mode Min Step Pe> tReset 0.0 s 100 s 0.01 s Pe>> ? No/Yes tPe>> 150s 0.01s Pe>> tReset 0.0 s 100 s 0.01 s...
  • Page 47 Getting Started P12y/EN GS/D32 MiCOM P125/P126 & P127 Page 29/48 DEFAULT VALUE Setting Range P125 P126 P127 Mode Min Step [49] Therm OL Therm OL ? No/Yes 0.1 In 3.2 In 0.01 Iθ> 1 mn 200 mn 1.05 1.05 0.01 θ...
  • Page 48 P12y/EN GS/D32 Getting Started Page 30/48 MiCOM P125/P126 & P127 DEFAULT VALUE Setting Range P125 P126 P127 Mode Min Step [59N] Residual Over Voltage Ue>>>> ? 57–130V Input Cortec code: P12--AX---X voltage. Ue>>>> 260 V 260 V 260 V 260V 0.1V...
  • Page 49 Getting Started P12y/EN GS/D32 MiCOM P125/P126 & P127 Page 31/48 DEFAULT VALUE Setting Range P125 P126 P127 Mode Min Step Trip tIe>> ? Yes/No Trip tIe>>> ? Yes/No Trip tPe/IeCos> ? Yes/No Trip tPe/IeCos>> Yes/No Trip tI2> ? Yes/No Trip tI2>> ? Yes/No Trip tI2>>>...
  • Page 50 P12y/EN GS/D32 Getting Started Page 32/48 MiCOM P125/P126 & P127 DEFAULT VALUE Setting Range P125 P126 P127 Mode Min Step Block tU>> ? N.A. N.A. N.A. N.A. Yes/No Block tU< ? N.A. N.A. N.A. N.A. Yes/No Block tU<< N.A. N.A.
  • Page 51 Getting Started P12y/EN GS/D32 MiCOM P125/P126 & P127 Page 33/48 DEFAULT VALUE Setting Range P125 P126 P127 Mode Min Step I2>> N.A. 0000000 0000000 tI2>> N.A. 0000000 0000000 I2>>> N.A. 0000000 0000000 tI2>>> N.A. 0000000 0000000 Therm Alarm N.A. 0000000...
  • Page 52 P12y/EN GS/D32 Getting Started Page 34/48 MiCOM P125/P126 & P127 DEFAULT VALUE Setting Range P125 P126 P127 Mode Min Step Input 2 None None None None, Unlatch, Blk Log 1, Blk Log 2, 52 a, 52 b, Aux 1, Aux 2, Aux 3, Aux 4, CB FLT, θ...
  • Page 53 Getting Started P12y/EN GS/D32 MiCOM P125/P126 & P127 Page 35/48 DEFAULT VALUE Setting Range P125 P126 P127 Mode Min Step CB Fail N.A. CB Fail ? N.A. Yes/No CB Fail Time tBF N.A. 0.10 s 0.10.s 10 s 0.01 s I<...
  • Page 54 P12y/EN GS/D32 Getting Started Page 36/48 MiCOM P125/P126 & P127 DEFAULT VALUE Setting Range P125 P126 P127 Mode Min Step tI2> N.A. 0000 0000 I2>> N.A. 0000 0000 tI2>> N.A. 0000 0000 I2>>> N.A. 0000 0000 tI2>>> N.A. 0000 0000 Thermal Alarm N.A.
  • Page 55 Getting Started P12y/EN GS/D32 MiCOM P125/P126 & P127 Page 37/48 DEFAULT VALUE Setting Range P125 P126 P127 Mode Min Step Time Peak Value N.A. Time Window N.A. 5 mn 5 mn 5 mn,10 mn,15mn,30mn, 60mn (*) Please note The Pe thresholds are displayed in the format: ##.## x Ien W The threshold value is in Watt [W] secondary.

  • Page 56: Description Rear Terminal Block For P125

    P12y/EN GS/D32 Getting Started Page 38/48 MiCOM P125/P126 & P127 DESCRIPTION REAR TERMINAL BLOCK FOR P125, P126 & P127 14.1 Description Rear Terminal Block for P125 Case earth Module terminal blocks viewed from rear (with integral case earth link) P0071ENa...
  • Page 57 Getting Started P12y/EN GS/D32 MiCOM P125/P126 & P127 Page 39/48 14.2 Description Rear Terminal Block for P126 & P127 Case earth Module terminal blocks viewed from rear (with integral case earth link) P0072ENa Input 7 57 58 Input 6 Output 5...

  • Page 58: Local Connection To A Pc

    P12y/EN GS/D32 Getting Started Page 40/48 MiCOM P125/P126 & P127 LOCAL CONNECTION TO A PC 15.1 Configuration For a local connection between a PC and the relay a serial cable with metallic shield should be used. The wiring of the RS232 cable must be as shown in the following drawing.

  • Page 61: Wiring Diagrams For

    Getting Started P12y/EN GS/D32 MiCOM P125/P126 & P127 Page 43/48 WIRING DIAGRAMS FOR P125, P126 & P127 17.1 P125 Wiring Diagram Watch Dog Phase rotation Auxiliary Voltage A B C Programmable tripping output Programmable output Programmable output 32N 50N 51N...

  • Page 62: P126 Wiring Diagram

    P12y/EN GS/D32 Getting Started Page 44/48 MiCOM P125/P126 & P127 17.2 P126 Wiring Diagram Phase rotation A B C Auxiliary Voltage 50BF Programmable input L1 Programmable input L2 Programmable input L3 Programmable input L4 MiCOM Programmable input L5 P126 Programmable input L6...

  • Page 63: P127 Wiring Diagram

    Getting Started P12y/EN GS/D32 MiCOM P125/P126 & P127 Page 45/48 17.3 P127 Wiring Diagram Phase rotation Auxiliary Voltage A B C 50BF Programmable input L1 Programmable input L2 Programmable input L3 Programmable input L4 MiCOM Programmable input L5 P127 Programmable input L6...

  • Page 64: Case Dimensions

    P12y/EN GS/D32 Getting Started Page 46/48 MiCOM P125/P126 & P127 CASE DIMENSIONS 18.1 P126 & P127 Case Dimension P0077ENa 18.2 P125 Case Dimension P0078ENa...

  • Page 65: Company Contact Information

    If you need information pertaining to the operation of this MiCOM product that you have purchased, please contact your local AREVA T&D agent or the After Sales Service Department of AREVA T&D. Do not forget to give the serial number and reference of the MiCOM product.
  • Page 66 P12y/EN GS/D32 Getting Started Page 48/48 MiCOM P125/P126 & P127 BLANK PAGE...
  • Page 67 Handling, Installation and Case Dimensions P12y/EN IN/C22 MiCOM P125/P126 & P127 HANDLING, INSTALLATION AND CASE DIMENSIONS...
  • Page 69 Handling, Installation and Case Dimensions P12y/EN IN/C22 MiCOM P125/P126 & P127 Page 1/10 CONTENT GENERAL CONSIDERATIONS Receipt of relays Electrostatic discharge (ESD) HANDLING OF ELECTRONIC EQUIPMENT RELAY MOUNTING UNPACKING STORAGE CASE DIMENSIONS MiCOM P126 & P127 MiCOM P125...
  • Page 70 P12y/EN IN/C22 Handling, Installation and Case Dimensions Page 2/10 MiCOM P125/P126 & P127 BLANK PAGE...

  • Page 71: General Considerations

    If damage has been sustained during transit a claim should be made to the transport contractor and AREVA should be promptly notified. Relays that are supplied unmounted and not intended for immediate installation should be returned to their protective polythene bags.

  • Page 72: Handling Of Electronic Equipment

    P12y/EN IN/C22 Handling, Installation and Case Dimensions Page 4/10 MiCOM P125/P126 & P127 HANDLING OF ELECTRONIC EQUIPMENT A person’s normal movements can easily generate electrostatic potentials of several thousand volts. Discharge of these voltages into semiconductor devices when handling electronic circuits can cause serious damage, which often may not be immediately apparent but the reliability of the circuit will have been reduced.

  • Page 73: Relay Mounting

    Handling, Installation and Case Dimensions P12y/EN IN/C22 MiCOM P125/P126 & P127 Page 5/10 RELAY MOUNTING Relays are dispatched either individually or as part of a panel/rack assembly. If an MMLG test block is to be included it should be positioned at the right-hand side of the assembly (viewed from the front).

  • Page 74: Unpacking

    P12y/EN IN/C22 Handling, Installation and Case Dimensions Page 6/10 MiCOM P125/P126 & P127 UNPACKING Care must be taken when unpacking and installing the relays so that none of the parts is damaged or the settings altered. Relays must only be handled by skilled persons. The installation should be clean, dry and reasonably free from dust and excessive vibration.

  • Page 75: Storage

    Handling, Installation and Case Dimensions P12y/EN IN/C22 MiCOM P125/P126 & P127 Page 7/10 STORAGE If relays are not to be installed immediately upon receipt they should be stored in a place free from dust and moisture in their original cartons. Where de-humidifier bags have been included in the packing they should be retained.

  • Page 76: Case Dimensions

    P12y/EN IN/C22 Handling, Installation and Case Dimensions Page 8/10 MiCOM P125/P126 & P127 CASE DIMENSIONS MiCOM P125, P126 and P127 relays are available in a 4U metal case for panel or flush mounting.
  • Page 77 Handling, Installation and Case Dimensions P12y/EN IN/C22 MiCOM P125/P126 & P127 Page 9/10 MiCOM P126 & P127 P0077ENb MiCOM P125 P0078ENb...
  • Page 78 P12y/EN IN/C22 Handling, Installation and Case Dimensions Page 10/10 MiCOM P125/P126 & P127 BLANK PAGE...
  • Page 79 User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 USER GUIDE...
  • Page 81 User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 1/86 CONTENT INTRODUCTION PASSWORD Password Protection Password Entry Changing the Password Change of Setting Invalidation Displays of Alarm & Warning Messages 2.5.1 Electrical Network Alarms 2.5.2 Relay Hardware or Software Warning Messages...
  • Page 82 P12y/EN FT/D32 User Guide Page 2/86 MiCOM P125/P126 & P127 Menu PROTECTION 4.6.1 Submenu [67/50/51] Directional Three Phase Overcurrent (P127) 4.6.2 Submenu [67N/50N/51N] Directional Earth Overcurrent 4.6.3 Submenu [50/51] Three Phase Overcurrent (P126) 4.6.4 Submenu [32N] Earth Wattmetric Protection 4.6.5 Submenu [46] Negative Phase Sequence Overcurrent (P126 &...

  • Page 83: Introduction

    MiCOM P125/P126 & P127 Page 3/86 INTRODUCTION MiCOM P125, P126 & P127 are fully numerical relays designed to perform electrical protection and control functions. The following sections describe content and structure of the menu. The five keys situated in the middle of the MiCOM relay front panel are dedicated to set parameters.

  • Page 84: Password

    P12y/EN FT/D32 User Guide Page 4/86 MiCOM P125/P126 & P127 PASSWORD Password Protection Password protection is applicable to most of the relay settings, especially to the selection of the various alarm thresholds, trip thresholds, communication parameters, allocation of logic inputs and outputs.

  • Page 85: Electrical Network Alarms

    User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 5/86 2.5.1 Electrical Network Alarms Any crossing of a threshold (instantaneous or time delay) generates an "electrical network alarm". The involved threshold is indicated. Regarding the phase thresholds, the phase designation (A, B or C) is also displayed.
  • Page 86 ON and OFF the relay. Following this, the last unsuccessful setting change will then need to be re-applied. If the alarm persists, i.e. the "SETTING ERROR" alarm is still displayed, please contact AREVA After Sales Services for advice and assistance.
  • Page 87 User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 7/86 tIe> trip threshold directional/non directional earth fault tIe>> trip threshold directional/non directional earth fault tIe>>> trip threshold directional/non directional earth fault Pe/IeCos> alarm threshold wattmetric/IeCos earth fault Pe/IeCos>> alarm threshold wattmetric/IeCos earth fault tPe/IeCos>...
  • Page 88 P12y/EN FT/D32 User Guide Page 8/86 MiCOM P125/P126 & P127 CB Fail circuit breaker failure signal; the CB does not trip on tBF (time-out). tBF is settable in the AUTOMAT. CTRL/CB Fail menu. SF6 Low faulty circuit breaker signal assignable...

  • Page 89: General Characterisitcs

    Ve can be calculated as Ve = (VA+ VB+ VC )/3 • On the MiCOM P125 relays rear terminals there is one current input rated 1A and one current input rated 5A available and one voltage input. On the MiCOM P126 relay rear terminals there are four current inputs rated 1A and four current inputs rated 5A available and one voltage input.
  • Page 90 No Password is required to read and acknowledge (clear) these alarm messages. On their rear terminals the MiCOM P125, P126 & P127 relays have a standard RS485 port available. The user can choose, by ordering, the communication protocol ModBus RTU, IEC 60870-5-103, Courier (when available), or DNP3 (when available).

  • Page 91: Menu

    The menu of the MiCOM P125, P126 & P127 relays is organised into main menus and submenus. The available content depends on the MiCOM model. The menu for the MiCOM P125 relay is divided into 7 sections and for the MiCOM P126 & P127 relays into 8 sections: ⇒...

  • Page 92: Additional Op Parameters Menu Points For P126 & P127

    P12y/EN FT/D32 User Guide Page 12/86 MiCOM P125/P126 & P127 Indicate the type of relay, the near number is the sensitivity Description for the earth input circuit. P125-2 from 0.1 to 40 Ien from 0.01 to 8 Ien 0.002 to 1 Ien...
  • Page 93 User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 13/86 Menu CONFIGURATION The following parameters can be set in the CONFIGURATION menu: • labels used to display currents and voltages • ratios for the earth and phase current transformers (CT) •...

  • Page 94: Submenu General Options

    P12y/EN FT/D32 User Guide Page 14/86 MiCOM P125/P126 & P127 4.2.1 Submenu General Options The following submenu displays the connection mode only for the P127 and the default display only for the P126. The General Options submenu is not available for the P125 relay. The default display is fixed to IN and there is no VT connection setting choice.
  • Page 95 User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 15/86 The following displays are only shown if the connection mode 2Vpp+Vr or 2Vpn+Vr is selected. Displays the rated primary voltage of the earth VT. The E/Gnd VT primary rated voltage input range is given by relay Cortec code.
  • Page 96 P12y/EN FT/D32 User Guide Page 16/86 MiCOM P125/P126 & P127 Directional earth fault protection TEXT P125 P126 P127 Information Ie> Instantaneous 1st threshold earth overcurrent tIe> Time delayed 1st threshold earth overcurrent Ie>> Instantaneous 2nd threshold earth overcurrent tIe>> Time delayed 2nd threshold earth overcurrent Ie>>>...
  • Page 97 User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 17/86 Undervoltage protection TEXT P125 P126 P127 Information U< alarm threshold undervoltage tU< trip threshold undervoltage U<< alarm threshold undervoltage tU<< trip threshold undervoltage Residual overvoltage protection TEXT P125 P126 P127 Information Ue>>>>...

  • Page 98: Example: Setting Led 5 For P126

    P12y/EN FT/D32 User Guide Page 18/86 MiCOM P125/P126 & P127 4.2.4 Example: Setting LED 5 for P126: Heading of CONFIGURATION menu. CONFIGURATION To gain access to the LED submenu, press " and $ until the submenu is reached. Heading Led submenu.
  • Page 99 User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 19/86 Setting choice Yes: LED 5 lights up when I>> threshold is Led 5 exceeded. I>> Setting choice No: No operation when I>> threshold is exceeded. Setting choice Yes: LED 5 lights up when tI>> delay time Led 5 has elapsed.
  • Page 100 P12y/EN FT/D32 User Guide Page 20/86 MiCOM P125/P126 & P127 Setting choice Yes: LED 5 lights up with signal present at Led 5 logic input 4. Input 4 Setting choice No: No operation with signal present at logic input 4.

  • Page 101: Submenu Logic Inputs Choice: Active High/Low (P125)

    User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 21/86 4.2.5 Submenu Logic Inputs Choice: Active High/Low (P125) Heading of CONFIGURATION menu. CONFIGURATION To gain access to the Inputs submenu, press " and $ until the submenu is reached. Heading Inputs submenu.
  • Page 102 P12y/EN FT/D32 User Guide Page 22/86 MiCOM P125/P126 & P127 To modify press % and using ! " keys to select if the Start/Stop tAUX2 control of the timer is on the change of the LEVEL of the By Input LEVEL relevant input or on the EDGE of the relevant input.

  • Page 103: Submenu Output Relay 1 In Fail Safe Mode

    User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 23/86 4.2.7 Submenu Output Relay 1 in Fail Safe mode Heading of CONFIGURATION menu. CONFIGURATION To gain access to the RL1 Output relay submenu, press ", $ until the submenu is reached.

  • Page 104: Menu Measurements

    P12y/EN FT/D32 User Guide Page 24/86 MiCOM P125/P126 & P127 Heading of CONFIGURATION menu. CONFIGURATION To gain access to the Alarm submenu, press ", $ until the submenu is reached. Heading Alarm submenu. Alarms To gain access to the submenu content, press ".

  • Page 105: Voltage Connections

    User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 25/86 Voltage Connections For the P127, it is important to select the VTs configuration in the Configuration/General Options/ VT Connection submenu in according to the relay wiring for a corrected functionality of the voltage protections, of the three phase and earth fault directional protections.

  • Page 106: Menu Measurements For P125

    P12y/EN FT/D32 User Guide Page 26/86 MiCOM P125/P126 & P127 The following table lists the shown voltage measurements Configuration Displayed Configuration Displayed on Configuration Displayed 3Vpn on HMI 2Vpn+Vr 2Vpp + Vr on HMI Direct Direct ------------- measurement measurement Direct...

  • Page 107: Measurements Menu Points For P126

    User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 27/86 4.4.5 MEASUREMENTS Menu Points for P126 Heading of MEASUREMENTS menu. MEASUREMENTS To gain access to the items of the menu, press " and $ until the submenu is reached. To gain access to the submenu contents, press "...
  • Page 108 P12y/EN FT/D32 User Guide Page 28/86 MiCOM P125/P126 & P127 Displays the true RMS maximum current value for phase C. IC Rms 600.00 A Displays the true RMS average current value for phase A. Average IA Rms 600.00 A Displays the true RMS average current value for phase B.

  • Page 109: Additional Measurements Menu Points For P127

    User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 29/86 4.4.6 Additional Measurements Menu Points for P127 Following is the display of voltages when a 3Vpn connection mode is chosen (three phases - neutral). Displays the RMS voltage value of phase A.
  • Page 110 P12y/EN FT/D32 User Guide Page 30/86 MiCOM P125/P126 & P127 Following is the display of voltages when a 2Vpn+Vr connection mode is chosen (two phases - neutral plus earth voltage). The visualisation depends on connection mode. Displays the RMS voltage value of phase A.
  • Page 111 User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 31/86 Following is the display of voltages when a 2Vpp+Vr connection mode is chosen (two phase - phase plus earth voltage). Displays the RMS line voltage value UAB. 100.00 V Displays the RMS line voltage value UBC.

  • Page 112: Menu Communication

    P12y/EN FT/D32 User Guide Page 32/86 MiCOM P125/P126 & P127 Menu COMMUNICATION The COMMUNICATION menu depends on the type of communications protocol: ModBus, Courier, IEC 60870-5-103 or DNP3. To gain access to the COMMUNICATION menu from the default display, press " then $ until the menu is reached.

  • Page 113: Menu Protection

    There are two protection menus they are designated as PROTECTION G1 and PROTECTION G2 menu and are available for the MiCOM P125, P126 & P127 relays. By opening the PROTECTION menu the user can program the parameters of various protection functions and settings (thresholds, time delay, logic) associated with each of the phase or earth protection functions.

  • Page 114: Submenu [67/50/51] Directional Three Phase Overcurrent (P127)

    P12y/EN FT/D32 User Guide Page 34/86 MiCOM P125/P126 & P127 4.6.1 Submenu [67/50/51] Directional Three Phase Overcurrent (P127) Heading of Protection G1 menu. PROTECTION G1 To gain access to menu, press " and $ until the submenu is reached. Heading of [67/50/51] submenu.
  • Page 115 User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 35/86 4.6.1.2 Threshold Menu I> RI Displays delay time type threshold. Setting choices are: Delay Type DMT (definite time), RI for the electromechanical inverse time curve, IEC-XX, CO2, CO8, IEEE-XX inverse time delay curve and RECT curve.
  • Page 116 P12y/EN FT/D32 User Guide Page 36/86 MiCOM P125/P126 & P127 4.6.1.5 Threshold Menu I> ANSI/IEEE Displays threshold delay time type. Setting choices are: Delay Type DMT (definite time) RI for the electromechanical inverse IEEE-EI time curve, IEC-XX, CO2, CO8, IEEE-XX inverse time delay curve and RECT curve.
  • Page 117 User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 37/86 Selection of the second alarm threshold function for phase I>> ? OC (I>>). Setting choice: No, Yes, DIR. If the user selects DIR, the following window is shown: If the user selects Yes, the non-directional choice window is shown.

  • Page 118: Submenu [67N/50N/51N] Directional Earth Overcurrent

    P12y/EN FT/D32 User Guide Page 38/86 MiCOM P125/P126 & P127 Displays angle value for the Trip Zone. I>>> ±10 ° This defines the operating region to either side of the torque Trip Zone angle. Setting range is from ±10° to 170°, in steps of 1°.
  • Page 119 User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 39/86 4.6.2.1 Threshold Menu Ie> DMT Displays threshold delay time type. Setting choices are: Delay Type DMT (definite time), RI for the electromechanical inverse time curve, IEC-XX, CO2, CO8, IEEE-XX inverse time delay curve and RECT curve.
  • Page 120 P12y/EN FT/D32 User Guide Page 40/86 MiCOM P125/P126 & P127 4.6.2.4 Threshold Menu Ie> Redtifier curve Displays threshold delay time type. Setting choices are: Delay Type DMT (definite time) RI for the electromechanical inverse RECT time curve, IEC-XX, CO2, CO8, IEEE-XX, RECT inverse time delay curve.
  • Page 121 User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 41/86 4.6.2.7 Threshold Menu Ie>> For the IDMT delay time choice all the parameters follow the first threshold Ie> excluding the interlock choice. Selection of the second alarm threshold function for earth Ie>>...
  • Page 122 P12y/EN FT/D32 User Guide Page 42/86 MiCOM P125/P126 & P127 4.6.2.8 Threshold Menu Ie>>> Selection of the third threshold function for earth fault Ie>>> ? current (Ie>>>). Setting choice: No, Yes, PEAK, DIR. If the user selects Yes, the following window is shown and I>>>...

  • Page 123: Submenu [50/51] Three Phase Overcurrent (P126)

    User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 43/86 4.6.3 Submenu [50/51] Three Phase Overcurrent (P126) Heading of Protection G1 menu. PROTECTION G1 To gain access to menu, press " and $ until the submenu is reached. Heading of [50/51] submenu.
  • Page 124 P12y/EN FT/D32 User Guide Page 44/86 MiCOM P125/P126 & P127 4.6.3.3 Threshold Menu I> IEC-XX Displays threshold delay time type. Setting choices are: Delay Type DMT (definite time) RI for the electromechanical inverse IEC-STI time curve, IEC-XX, CO2, CO8, IEEE-XX inverse time delay curve and RECT curve.
  • Page 125 User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 45/86 Displays the reset delay time type. Reset Delay Type Select between DMT (Definitive Time) and IDMT (Inverse IDMT Time). If the user selects IDMT delay type, the following menu is...

  • Page 126: Submenu [32N] Earth Wattmetric Protection

    P12y/EN FT/D32 User Guide Page 46/86 MiCOM P125/P126 & P127 4.6.4 Submenu [32N] Earth Wattmetric Protection Heading of Protection menu. PROTECTION To gain access to menu for P125 relay, press ". To gain access to menu (Protection G1 & G2) for P126 and P127 relays press "...
  • Page 127 User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 47/86 4.6.4.1 Threshold Menu Pe/IeCos> RI Displays threshold delay time type. Setting choices are: Delay Type DMT (definite time) RI for the electromechanical inverse time curve, IEC-XX, CO2, CO8, IEEE-XX inverse time delay curve and RECT curve.
  • Page 128 P12y/EN FT/D32 User Guide Page 48/86 MiCOM P125/P126 & P127 4.6.4.5 Reset Threshold Menu Pe/IeCos> DMT/IDMT IEEE/ANSI Displays the reset delay time type. Reset Delay Type Select between DMT (Definitive Time) and IDMT (Inverse Time). If the user selects DMT delay type, the following menu is displayed: Displays setting value for the reset time.

  • Page 129: Submenu [46] Negative Phase Sequence Overcurrent (P126 & P127)

    User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 49/86 Displays the setting angle for Pe/IeCos. This item is only Pe> Pe>> activated if at least one of the Pe/IeCos thresholds is ANGLE 90° enabled. The setting range is from 0° to 359°, in steps of 1°.
  • Page 130 P12y/EN FT/D32 User Guide Page 50/86 MiCOM P125/P126 & P127 4.6.5.3 Threshold Menu I2> RECT curve Displays the type of RECT curve for I2> delay time. Delay Type RECT Displays the TMS value associated to IEC family of curves. The setting range is from 0.025 to 1.5, in steps of 0.025.

  • Page 131: Submenu [49] Thermal Replica Overload (P126 & P127)

    User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 51/86 4.6.5.7 Threshold Menu I2>>> Selection of the third alarm threshold function for Negative I2>>> ? Phase Sequence OC (I2>>>). Setting choice: No, Yes. If the user selects Yes, the following window is shown: If the user selects No, the next window will show the submenu [46] Neg Seq OC.

  • Page 132: Submenu [37] Undercurrent Protection (P126 & P127)

    P12y/EN FT/D32 User Guide Page 52/86 MiCOM P125/P126 & P127 4.6.7 Submenu [37] Undercurrent Protection (P126 & P127) Heading of Protection G1 menu. PROTECTION G1 To gain access to menu, press " and $ until the submenu is reached. Heading of [37] submenu.

  • Page 133: Submenu [27] Under-Voltage Protection (P127)

    User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 53/86 Displays setting value for the trip threshold. t U>> The setting range is from 0 to 600 s, in steps of 10ms 600.00 s By pushing " the next window will display the [59] Phase Over Voltage 4.6.9...

  • Page 134: Submenu [79] Autoreclose (P126 & P127)

    P12y/EN FT/D32 User Guide Page 54/86 MiCOM P125/P126 & P127 Displays setting value for the alarm threshold. Ue>>>> Input voltage range 57–130V: from 1 to 260V, in steps of 5.0 V 0.1 V. Input voltage range 220–480V: from 10 to 960V, in steps of 0.5 V.
  • Page 135 User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 55/86 Displays setting value of the inhibit time (tI) for the Inhib Time autoreclose function (following a manual CB closure). 5.00 s Setting range from 0.01 s to 600 s, in steps of 10 ms.

  • Page 136: Menu Automat. Ctrl

    User Guide Page 56/86 MiCOM P125/P126 & P127 Menu AUTOMAT. CTRL The AUTOMAT. CTRL Menu makes it possible to programme the various automation functions included in the MiCOM P125, P126 & P127 relays. The various submenus are: • Trip Commands •...
  • Page 137 User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 57/86 Assigning the second earth wattmetric trip threshold to trip Trip tPe/IeCos>> output (RL1). Setting choice: Yes, No Assigning the trip threshold for residual overvoltage to trip Trip tUe>>>> output (RL1).
  • Page 138 P12y/EN FT/D32 User Guide Page 58/86 MiCOM P125/P126 & P127 Trip Thermal θ Assigning the thermal overload trip threshold to output relay RL1. Setting choice: Yes, No Assigning the residual overvoltage trip threshold to output Trip tUe>>>> relay RL1. Setting choice: Yes, No Assigning the broken conductor detection signal to output Trip Brkn.

  • Page 139: Submenu Latch Relays

    User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 59/86 4.7.2 Submenu Latch Relays With this submenu the user can program trip functions so that the resulting output signal will remain latched after the cause for exceeding the threshold has disappeared.

  • Page 140: Submenu Blocking Logic

    4.7.3 Submenu Blocking Logic The MiCOM P125 relay has the submenu Blocking Logic available for setting. MiCOM P126 & P127 relays have the submenu Blocking Logic 1 and Blocking Logic 2 available for setting. By opening the Blocking Logic submenu the user can assign each delayed threshold to the "Blk Log"...
  • Page 141 User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 61/86 4.7.3.2 Additional Blocking Logic Menu Points for P126 & P127 Enables/disables Blocking Logic 1 of the first trip threshold Block1 tI> for phase OC from locking on the level (logic state = 1) of logic input "Blk Log".

  • Page 142: Submenu Logic Select

    P12y/EN FT/D32 User Guide Page 62/86 MiCOM P125/P126 & P127 4.7.4 Submenu Logic Select With the submenu Logic Select. 1 or Logic Select. 2 the user can assign each trip threshold to the "Log Sel" input (refer to Inputs menu). To access the submenu Logic Select. 1 or Logic Select.
  • Page 143 User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 63/86 4.7.5.1 Submenu Outputs Relays for P125 Heading of AUTOMAT. CTRL menu. AUTOMAT. CTRL To gain access to the Output Relays submenu, press " and $ until the submenu is reached.
  • Page 144 P12y/EN FT/D32 User Guide Page 64/86 MiCOM P125/P126 & P127 Assigning the alarm threshold for residual overvoltage Ue>>>> :65432 (Ue>>>>) to the output relays; i.e. to output 3 (RL3). 00010 Setting choice: 1 assigns the output relay; 0 no assignment.
  • Page 145 User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 65/86 Assigning third alarm threshold for phase OC (I>>>) to the I>>> :8765432 output relays; i.e. to output 3 & 7 (RL3 & RL7). 0100010 Setting choice: 1 assigns the output relay; 0 no assignment.
  • Page 146 P12y/EN FT/D32 User Guide Page 66/86 MiCOM P125/P126 & P127 Assigning first earth wattmetric alarm threshold (Pe/IeCos>) :8765432 to the output relays; i.e. to output 3, 7 & 8 (RL3, RL7 & IeCos> 1100010 RL8). Setting choice: 1 assigns the output relay; 0 no assignment.
  • Page 147 User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 67/86 Assigning trip threshold for residual overvoltage to the tUe>>>>: 8765432 output relays; i.e. to output 3, 7 & 8 (RL3, RL7 & RL8). 1100010 Setting choice: 1 assigns the output relay; 0 no assignment.
  • Page 148 P12y/EN FT/D32 User Guide Page 68/86 MiCOM P125/P126 & P127 Assigning the logic AND equation A result trip signal to the t EQU.A :8765432 output relays; i.e. to output 8 (RL8). 1000000 Setting choice: 1 assigns the output relay; 0 no assignment.

  • Page 149: Submenu Inputs

    User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 69/86 4.7.6 Submenu Inputs Each relay model has a fixed number of opto-isolated logic inputs. Logic inputs: Model P125 P126 P127 Logic Input With the submenu Inputs it is possible to assign a label or an automation function to each...

  • Page 150: Setting Auxiliary Timers At The End Of Submenu Inputs

    P12y/EN FT/D32 User Guide Page 70/86 MiCOM P125/P126 & P127 4.7.7 Setting auxiliary timers at the end of submenu Inputs Heading of AUTOMAT. CTRL menu. AUTOMAT. CTRL To gain access to the Inputs menu, press " and $ until the submenu is reached.

  • Page 151: Submenu Broken Conductor (P126 & P127)

    User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 71/86 4.7.8 Submenu Broken Conductor (P126 & P127) Heading of AUTOMAT. CTRL menu. AUTOMAT. CTRL To gain access to the Broken Conductor detector menu, press " and $ until the submenu is reached.

  • Page 152: Submenu Circuit Breaker Fail (P126 & P127)

    P12y/EN FT/D32 User Guide Page 72/86 MiCOM P125/P126 & P127 Assigning the first trip threshold for negative sequence Cold Load PU overcurrent (I2>) to cold load pick up function. tI2>? Setting choice: Yes, No Assigning the second trip threshold for negative sequence Cold Load PU overcurrent (I2>>) to cold load pick up function.

  • Page 153: Submenu Circuit Breaker Supervision (P126 & P127)

    User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 73/86 4.7.11 Submenu Circuit Breaker Supervision (P126 & P127) With the CB Supervision submenu circuit breakers can be supervised and monitored, and associated parameters can be set. Heading of AUTOMAT. CTRL menu.

  • Page 154: Submenu Sotf (Switch On To Fault) (P126 & P127)

    P12y/EN FT/D32 User Guide Page 74/86 MiCOM P125/P126 & P127 The below two settings are also available in the P125 for the Local/remote functionality Displays and sets the tripping pulse time. tOpen Pulse Setting range is from 0.1 to 5 s, in steps of 10 ms.
  • Page 155 User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 75/86 Assigning third alarm threshold for phase OC (I>>>) to one I>>> :DCBA (or more) of the logic equations A, B, C and D. 0000 Setting choice: 1 assigns the logic equation; 0 no assignment.
  • Page 156 P12y/EN FT/D32 User Guide Page 76/86 MiCOM P125/P126 & P127 Assigning first alarm threshold for negative sequence I2> :DCBA overcurrent (I2>) to one (or more) of the equations A, B, C 0000 and D. Setting choice: 1 assigns the logic equation; 0 no assignment.
  • Page 157 User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 77/86 Assigning alarm threshold for residual overvoltage Ue>>>> :DCBA (Ue>>>>) to one (or more) of the equations A, B, C and D. 0000 Setting choice: 1 assigns the logic equation; 0 no assignment.
  • Page 158 P12y/EN FT/D32 User Guide Page 78/86 MiCOM P125/P126 & P127 4.7.12.2 Additional AND Logic Submenu Points for P127 Assigning first alarm threshold for overvoltage (U>) to one U> : DCBA (or more) of the equations A, B, C and D.
  • Page 159 User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 79/86 4.7.12.3 Submenu AND Logic Equat. T Delay Heading of AUTOMAT. CTRL menu. AUTOMAT. CTRL To gain access to the AND logic equat submenu, press " and $ until the submenu is reached.

  • Page 160: Menu Records (P126 & P127)

    P12y/EN FT/D32 User Guide Page 80/86 MiCOM P125/P126 & P127 Menu RECORDS (P126 & P127) With the RECORDS menu stored data, events, disturbances and monitoring signals from various submenus can be displayed and read: • CB Monitoring • Fault record •...
  • Page 161 User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 81/86 4.8.1.1 Submenu Fault Record for P126 & P127 The Fault Record submenu makes it possible to read up to five stored fault records, that occurred when programmed thresholds where exceeded.
  • Page 162 P12y/EN FT/D32 User Guide Page 82/86 MiCOM P125/P126 & P127 Only P127 VCA Magnitude Displays the magnitude value of the phase C to phase A 10 KV voltage at the time of the fault. Displays the magnitude value of the residual voltage at the VN Magnitude time of the fault.

  • Page 163: Submenu Disturb Record

    User Guide P12y/EN FT/D32 MiCOM P125/P126 & P127 Page 83/86 4.8.2 Submenu Disturb Record The Disturb Record submenu makes it possible to open and read up to 4 disturbance records of 3 seconds each. Each disturbance record consists of analogue and digital data.

  • Page 164: Wiring

    The auxiliary power supply must only be connected to terminals 33 and 34. Current Measurement Inputs The MiCOM P125, P126 & P127 relays comprise up to eight current inputs (2 times 4 earth and phase current inputs). The nominal current value of the measuring inputs is either 1 Ampere or 5 Ampere (refer to wiring diagram).

  • Page 165: Communication

    5.5.2 RS232 Front Communication Port MiCOM P125, P126 & P127 relays provide the user with a RS232 communication port on the front panel. This link is dedicated to MiCOM setting software. The cable between the relays and the PC is a standard RS 232 shielded cable.
  • Page 166 P12y/EN FT/D32 User Guide Page 86/86 MiCOM P125/P126 & P127 BLANK PAGE...
  • Page 167 Technical Data P12y/EN TD/D32 MiCOM P125/P126 & P127 TECHNICAL DATA AND CHARACTERISTIC CURVES...
  • Page 169 Technical Data P12y/EN TD/D32 MiCOM P125/P126 & P127 Page 1/28 CONTENT RATINGS Power Supply Frequency Current Inputs Voltage Inputs Logic Inputs 1.5.1 Supply Output Relay Characteristic HIGH VOLTAGE WITHSTAND ELECTRICAL ENVIRONMENT ENVIRONMENT DEVIATION OF PROTECTION ELEMENTS DEVIATION OF AUTOMATION FUNCTIONS TIMERS...
  • Page 170 P12y/EN TD/D32 Technical Data Page 2/28 MiCOM P125/P126 & P127 8.10 Overvoltage Protection (P127) 8.10.1 Protection Setting Ranges (P127) 8.11 Residual Overvoltage Protection 8.11.1 Protection Setting Ranges 8.12 Multishot Autoreclose Function (P126 & P127) 8.12.1 Multishot Autoreclose Settings AUTOMATION CONTROL FUNCTIONS Cold Load Pickup (P126 &...

  • Page 171: Ratings

    Technical Data P12y/EN TD/D32 MiCOM P125/P126 & P127 Page 3/28 RATINGS Power Supply Nominal auxiliary voltage Uax 24-60Vdc; 48-150Vdc; 130-250Vdc 100-250Vac 50/60Hz 125-250Vdc/100-250Vac (special application) Operating range DC ± 20% of Ua AC – 20%, +10% of Ua Residual ripple Up to 12% ≥50 ms for interruption of Ua...

  • Page 172: Voltage Inputs

    P12y/EN TD/D32 Technical Data Page 4/28 MiCOM P125/P126 & P127 Voltage Inputs Voltage input range Un 57 to 130V Operating range 0 to 260V (measuring range) Burden Resistive 44 kΩ: 0.074W/57Veff 0.38W/130Veff 1.54W/260Veff Thermal Withstand Continuous 260V ph-ph eff 10 seconds...

  • Page 173: Output Relay Characteristic

    Technical Data P12y/EN TD/D32 MiCOM P125/P126 & P127 Page 5/28 Output Relay Characteristic Contact rating Contact relay Dry contact Ag CdO Make current Max. 30A and carrry for 3s Carry capacity 5A continuous Rated Voltage 250Vac Breaking characteristic Breaking capacity AC 1250 VA resistive 1250 VA inductive (P.F.

  • Page 174: Environment

    P12y/EN TD/D32 Technical Data Page 6/28 MiCOM P125/P126 & P127 ENVIRONMENT Temperature IEC 60-255-6 Storage -25 °C to +70 °C Operation -25 °C to + 55 °C Humidity IEC 600-68-2-3 56 days at 93% RH and 40 °C Enclosure protection...

  • Page 175: Deviation Of Protection Elements

    Technical Data P12y/EN TD/D32 MiCOM P125/P126 & P127 Page 7/28 DEVIATION OF PROTECTION ELEMENTS Glossary Phase current I>, I>>, I>>> & I< I2>, I2>> & I2>>> Ie>, Ie>> & Ie>>> IesCos : IeCos> & IeCos>> Earth fault (wattmetric) Pe> & Pe>>...

  • Page 176: Deviation Of Automation Functions Timers

    P12y/EN TD/D32 Technical Data Page 8/28 MiCOM P125/P126 & P127 Element Range Deviation Trigger Reset Time deviation ± 2% DT: Us ± 2% 0.95 Us ±2% ±2% +20…40ms Undervoltage 57 to 130V U< & U<< 2 to 130V ± 2% DT: Us ±...

  • Page 177: Protection Setting Ranges

    Technical Data P12y/EN TD/D32 MiCOM P125/P126 & P127 Page 9/28 PROTECTION SETTING RANGES [67/50/51] Directional/Non-Directional Phase Overcurrent (P127) − Phase current Fundamental only − Phase or phase to phase voltage Fundamental only − Minimum voltage operation 0.6V (Un: 57 to 130V) −...

  • Page 178: 50/51] Phase Overcurrent Protection (P126)

    P12y/EN TD/D32 Technical Data Page 10/28 MiCOM P125/P126 & P127 Setting Range [67] Phase OC Step I>> Torque angle 0° 359° 1° ±10° ±170° I>> Trip zone 1° I>>> ? No or Yes or DIR or Peak I>>> 0.5 In 40 In 0.01 In...

  • Page 179: 50N/51N] Dir./Non-Dir. Earth Fault Protection (P125, P126 & P127)

    Technical Data P12y/EN TD/D32 MiCOM P125/P126 & P127 Page 11/28 [67N/50N/51N] Dir./Non-Dir. Earth fault protection (P125, P126 & P127) − Earth fault current Fundamental only − Earth fault current ranges See following table − Residual voltage Fundamental only − Residual voltage range See following table −...
  • Page 180 P12y/EN TD/D32 Technical Data Page 12/28 MiCOM P125/P126 & P127 Setting Range [67N] Earth OC Step Input residual voltage with range from 220 to 480V Ue> 960 V 0.5 V Ie>> ? No or Yes or DIR Delay type DT or IDMT (IEC_STI, IEC_SI,...

  • Page 181: Earth Wattmetric Protection

    Technical Data P12y/EN TD/D32 MiCOM P125/P126 & P127 Page 13/28 Setting Range [67N] Earth OC Step Ue>>> 260 V 0.1 V Input residual voltage with range from 220 to 480V Ue>>> 960 V 0.5 V ATTENTION: THE Ue THRESHOLD SETTINGS DEPEND ON THE ADOPTED CONNECTION OPTION.

  • Page 182: Functionality Mode

    P12y/EN TD/D32 Technical Data Page 14/28 MiCOM P125/P126 & P127 Functionality Mode This protection element can operate in Pe or IeCos mode. 8.5.1 Protection Setting Ranges Setting range [32N] Earth Wattmetric Step Mode Pe or IeCos High sensitivity: Current input from 0.002 to 1 Ien Cortec code: P12-CAX---X 57–130V Input voltage...
  • Page 183 Technical Data P12y/EN TD/D32 MiCOM P125/P126 & P127 Page 15/28 Setting range [32N] Earth Wattmetric Step Cortec code P12-C-X---X High sensitivity IeCos IeCos> 0.002 Ien 1 Ien 0.001 Ien IeCos>> 0.002 Ien 1 Ien 0.001 Ien Cortec code P12-B-X---X Med. sensitivity IeCos IeCos>...

  • Page 184: Undercurrent Protection (P126 & P127)

    P12y/EN TD/D32 Technical Data Page 16/28 MiCOM P125/P126 & P127 Undercurrent Protection (P126 & P127) − Undercurrent − Phase current: Fundamental only 8.6.1 Protection Setting Ranges Setting ranges [37] Under Current Step I< ? Yes or No I< 0.1 In 1 In 0.01 In...

  • Page 185: Thermal Overload Protection (P126 & P127)

    Technical Data P12y/EN TD/D32 MiCOM P125/P126 & P127 Page 17/28 Thermal Overload Protection (P126 & P127) − Phase Current: 8.8.1 Protection Setting Ranges [49] Therm. OL Setting ranges Therm. OL ? No or Yes 0.1 In 3.2 In 0.01 Iθ...

  • Page 186: Overvoltage Protection (P127)

    P12y/EN TD/D32 Technical Data Page 18/28 MiCOM P125/P126 & P127 8.10 Overvoltage Protection (P127) − Phase or phase to phase voltage Fundamental only − AND or OR (*) Thresholds selection mode 8.10.1 Protection Setting Ranges (P127) Setting ranges [59] Phase Overvoltage...

  • Page 187: Residual Overvoltage Protection

    Technical Data P12y/EN TD/D32 MiCOM P125/P126 & P127 Page 19/28 8.11 Residual Overvoltage Protection − Residual voltage: Fundamental only 8.11.1 Protection Setting Ranges Setting range [59] Residual Overvoltage Step Cortec code: P127-AX---X 57–130V Input voltage. Ue>>>> ? No or Yes Ue>>>>...

  • Page 188: Multishot Autoreclose Settings

    P12y/EN TD/D32 Technical Data Page 20/28 MiCOM P125/P126 & P127 8.12.1 Multishot Autoreclose Settings Setting range [79] Autoreclose Step Autoreclose ? Yes or No Ext. CB Fail ? Yes or No Ext. CB Fail time 0.01 s 600 s 0.01 s Aux1 ((I>) ?

  • Page 189: Automation Control Functions

    Technical Data P12y/EN TD/D32 MiCOM P125/P126 & P127 Page 21/28 AUTOMATION CONTROL FUNCTIONS Cold Load Pickup (P126 & P127) Setting range Cold Load PU Step Cold Load PU ? Yes or No Level 100% 500% 0.1 s 3600 s 0.1 s Auxiliary Timers (P126 &...

  • Page 190: Trip Circuit Supervision (P126 & P127)

    P12y/EN TD/D32 Technical Data Page 22/28 MiCOM P125/P126 & P127 Trip Circuit Supervision (P126 & P127) 9.5.1 Trip Circuit Supervision Setting Ranges Setting range TC Supervision Step TC Supervision ? Yes or No t trip circuit tSUP 0.1 s 10 s 0.1 s...

  • Page 191: And Logic Equation (P126 & P127)

    Technical Data P12y/EN TD/D32 MiCOM P125/P126 & P127 Page 23/28 AND Logic Equation (P126 & P127) For the AND logic equations (A, B, C or D), a setting value 1 shows the assignment of a logic output to the equation; a setting value 0 shows no assignment of a logic output to the equation.

  • Page 192: Recording Functions (P126 & P127)

    P12y/EN TD/D32 Technical Data Page 24/28 MiCOM P125/P126 & P127 RECORDING FUNCTIONS (P126 & P127) 10.1 Event Records Capacity 75 events Time-tag 1 millisecond Triggers Any selected protection alarm and threshold Logic input change of state Setting changes Self test events 10.2...

  • Page 193: Communication

    Technical Data P12y/EN TD/D32 MiCOM P125/P126 & P127 Page 25/28 COMMUNICATION Type Relay Physical Link Connectors Data Rate Protocol Port position RS485 Rear port Screened twister Screws or 300 to 38400 baud ModBus RTU, Courier, pair snap-on (programmable) IEC60870-5-103, DNP3...

  • Page 194: Curves

    P12y/EN TD/D32 Technical Data Page 26/28 MiCOM P125/P126 & P127 CURVES 12.1 General Although the curves tend towards infinite when the current approaches Is (general threshold), the minimum guaranteed value of the operating current for all the curves with the inverse time characteristic is 1.1Is (with a tolerance of ±...

  • Page 195: Reset Timer

    Technical Data P12y/EN TD/D32 MiCOM P125/P126 & P127 Page 27/28 The RI curve has the following definition: ⋅ − K setting is from 0.10 to 10 in steps of 0.05. The equation is valid for 1.1 ≤ I/Is ≤ 20.

  • Page 196: Thermal Overload Curves

    P12y/EN TD/D32 Technical Data Page 28/28 MiCOM P125/P126 & P127 12.2 Thermal Overload Curves The thermal time characteristic is given by:  −      − ² ² τ   − ² ² Where: = Time to trip, following application of the overload current, I τ...
  • Page 197 Application Guide P12y/EN AP/D32 MiCOM P125/P126 & P127 APPLICATION GUIDE...
  • Page 199 Application Guide P12y/EN AP/D32 MiCOM P125/P126 & P127 Page 1/74 CONTENT INTRODUCTION Protection of Underground and Overhead Lines MiCOM Directional Relays CURRENT PROTECTIONS & AUTOMATION FUNCTIONS [67/50/51] Directional/non Directional Three Phase Overcurrent Protection (P127) [67] Directional Overcurrent protection 2.2.1 Description 2.2.2...
  • Page 200 P12y/EN AP/D32 Application Guide Page 2/74 MiCOM P125/P126 & P127 (27) Undervoltage Protection (P127) 3.5.1 Setting Guidelines (59) Overvoltage Protection (P127) 3.6.1 Setting Guidelines DESCRIPTION AND SETTING GUIDE OF THE AUTORECLOSE FUNCTION (P126 & P127) Available Settings Functionality 4.2.1 Activation 4.2.2...
  • Page 201 Application Guide P12y/EN AP/D32 MiCOM P125/P126 & P127 Page 3/74 5.12 Trip Circuit Supervision (P126 & P127) 5.12.1 MiCOM P126 & P127 Trip Circuit Supervision Mechanism 5.12.2 External Resistor R1 Calculation 5.13 Switch onto Fault Protection & Trip on Reclose (SOTF/TOR) (P126 & P127) 5.13.1...
  • Page 202 P12y/EN AP/D32 Application Guide Page 4/74 MiCOM P125/P126 & P127 BLANK PAGE...

  • Page 203: Introduction

    Application Guide P12y/EN AP/D32 MiCOM P125/P126 & P127 Page 5/74 INTRODUCTION Protection of Underground and Overhead Lines The secure and reliable transmission and distribution of power within a network is heavily dependent upon the integrity of underground cables and overhead lines, which link the various sections of the network together.

  • Page 204: Micom Directional Relays

    MiCOM P125/P126 & P127 MiCOM Directional Relays MiCOM relays are a range of products from AREVA T&D Protection & Control using the latest digital technology the range includes devices designed for application to a wide range of power system plant equipment such as motors, generators, feeders, overhead lines and cables.
  • Page 205 Application Guide P12y/EN AP/D32 MiCOM P125/P126 & P127 Page 7/74 The directional relays have been designed to provide more functionality in terms of protections, measuring, automatic operation and order control in any medium voltage electric network. The specific nature of these directional relays makes it possible to apply them to various applications, such as: medium voltage subscriber, cable line, overhead line etc.

  • Page 206: Current Protections & Automation Functions

    P12y/EN AP/D32 Application Guide Page 8/74 MiCOM P125/P126 & P127 CURRENT PROTECTIONS & AUTOMATION FUNCTIONS [67/50/51] Directional/non Directional Three Phase Overcurrent Protection (P127) The directional/non directional overcurrent protection has three thresholds. Each threshold can operate in directional or non-directional mode; if the setting is [Yes] it operates like a typical three-phase overcurrent protection.
  • Page 207 Application Guide P12y/EN AP/D32 MiCOM P125/P126 & P127 Page 9/74 This is achieved by means of the relay characteristic angle (RCA) setting (also referred to as torque angle). RCA defines the angle by which the current Uph-ph applied to the relay must be displaced...
  • Page 208 P12y/EN AP/D32 Application Guide Page 10/74 MiCOM P125/P126 & P127 Each directional threshold consists of: − Current threshold − RCA angle /Torque angle and Trip boundary zone The system voltage provides the polarisation signal, the minimum voltage operating value is 0.6V secondary for the voltage input range 57-130V and 3V for the voltage input range 220-...
  • Page 209 Application Guide P12y/EN AP/D32 MiCOM P125/P126 & P127 Page 11/74 LOGIC OF THE SECOND THRESHOLD I>> FOR THE 67 PROTECTION Rev . Inst. I>> ≥ Fwd. Inst. I>> IA & (IA^VBC) >> Fwd. Trip I>> ≥ DT/IDMT IB & (IB^VCA) >>...

  • Page 210: Synchronous Polarisation

    P12y/EN AP/D32 Application Guide Page 12/74 MiCOM P125/P126 & P127 2.2.2 Synchronous Polarisation The directional overcurrent elements are polarised by the line voltage (phase to phase) in quadrature to the considered phase current. The absolute phase angle of line voltages is measured every cycle and the last value is stored in the relay memory.

  • Page 211: Setting Guidelines

    Application Guide P12y/EN AP/D32 MiCOM P125/P126 & P127 Page 13/74 2.2.4 Setting Guidelines The applied current settings for directional overcurrent relays depend on the specific application. In a parallel feeder arrangement, load current is always flowing in the non- operating direction. Consequently the relay current setting may be less than the full load rating of the circuit, typically 50% of In.

  • Page 212: Directional Three Phase Overcurrent Applications

    P12y/EN AP/D32 Application Guide Page 14/74 MiCOM P125/P126 & P127 2.2.5 Directional three phase overcurrent applications 2.2.5.1 Parallel Feeders P126 P126 OC/EF OC/EF P127 P127 DOC/DEF DOC/DEF OC/EF OC/EF P126 OC/EF P0081ENa TYPICAL DISTRIBUTION SYSTEM USING PARALLEL TRANSFORMERS The above figure shows a typical distribution system using parallel power transformers.
  • Page 213 Application Guide P12y/EN AP/D32 MiCOM P125/P126 & P127 Page 15/74 2.2.5.2 Ring Main Arrangement A particularly common arrangement within distribution networks is the ring main circuit. The primary reason for its use is to maintain supplies to consumers in the event of fault conditions occurring on the interconnecting feeders.

  • Page 214: 50/51] Three Phase Overcurrent Protection (P126 - P127)

    P12y/EN AP/D32 Application Guide Page 16/74 MiCOM P125/P126 & P127 [50/51] Three phase Overcurrent protection (P126 – P127) The three phase overcurrent protection has three independent thresholds. The first and second threshold can be set as definite delay time or inverse delay time using the IEC, IEEE/ANSI, CO, RI and RECT curves where their parameters are shown in the Technical Data of this Application Guide.

  • Page 215: Three Phase Overcurrent Protection Applications

    Application Guide P12y/EN AP/D32 MiCOM P125/P126 & P127 Page 17/74 2.3.3 Three phase overcurrent protection applications Being P127 a three phase directional/non directional relay an overcurrent protection involves the P127 used as non directional relay and the P126. Some applications can be considered, but for indicative applications it is better to involve the blocking logic and selective functions, so an overcurrent application will be shown in the part of this TG regarding the blocking logic and selective function.
  • Page 216 P12y/EN AP/D32 Application Guide Page 18/74 MiCOM P125/P126 & P127 LOGIC OF THE THIRD THRESHOLD I>>> FOR THE 50/51 PROTECTION ≥ Inst. I>>> IA >>> ≥ Trip I>>> IB >>> IC >>> Lock the timer Blocking Logic P0362ENa...

  • Page 217: Directional Earth Fault Protection (P125, P126 & P127)

    MiCOM P125/P126 & P127 Page 19/74 Directional Earth Fault Protection (P125, P126 & P127) The MiCOM P125, P126, P127 relays have a directional/non directional earth fault protection. It provides three directional/non directional earth overcurrent thresholds and two wattmetric and active earth fault current thresholds.

  • Page 218: General Setting Guidelines

    P12y/EN AP/D32 Application Guide Page 20/74 MiCOM P125/P126 & P127 The K factor is 1, if Ien=1A, 5 if Ien=5A. Ie [mA] Ie [mA] Ue> Ue>> Ue> Ue>>> Ue>> Ue>> > Tripping Zone Tripping Zone Ie + Ue= 18 Ie + 5 x Ue= 90 Ie>...

  • Page 219: An Application Of 67N In An Insulated Systems

    One possibility for earth fault detection is by applying a residual over-voltage protection device. This functionality is provided by the MiCOM P125, P126 and P127 relays. However, fully discriminative earth fault protection on this type of system can only be achieved by earth fault protection element.
  • Page 220 Application Guide Page 22/74 MiCOM P125/P126 & P127 From above figure and the vector diagram below it can be seen that the relays on the healthy feeders see the unbalance in the charging currents on their own feeder. The relay on the faulted feeder, however, sees the charging current from the rest of the system [IH1 and IH2 in this case], with it’s own feeders charging current [IH3] being cancelled out.

  • Page 221: Wattmetric (Pe) Characteristic

    Application Guide P12y/EN AP/D32 MiCOM P125/P126 & P127 Page 23/74 2.4.3 Wattmetric (Pe) Characteristic The P125, P126 and P127 relays include the zero sequence power measurement function. They also offer the possibility to choose between a Wattmetric (Pe) protection and IeCos (active component of the earth fault current) protection functionality mode.
  • Page 222 P12y/EN AP/D32 Application Guide Page 24/74 MiCOM P125/P126 & P127 2.4.3.1 Setting Guidelines for Pe Thresholds The Pe thresholds are displayed in the format: ##.## x Ien W In this formula the ##.## setting value is multiplied by the setting value of the Ien.

  • Page 223: Application Considerations

    Application Guide P12y/EN AP/D32 MiCOM P125/P126 & P127 Page 25/74 2.4.4 Application Considerations The protection Pe> and Pe>> require relay current and voltage connections to be actived. The measurement of the Pe depends on the voltage wiring of the relay.

  • Page 224: Thermal Overload Protection (P126 & P127)

    P12y/EN AP/D32 Application Guide Page 26/74 MiCOM P125/P126 & P127 Thermal Overload Protection (P126 & P127) Thermal overload protection can be applied to prevent damages to the electrical plant equipment when operating at temperatures in excess of the designed maximum withstand. A prolonged overloading causes excessive heating, which may result in premature deterioration of the insulation, or in extreme cases, insulation failure.

  • Page 225: Mathematical Formula Applicable To Micom Relays

    Application Guide P12y/EN AP/D32 MiCOM P125/P126 & P127 Page 27/74 2.5.2 Mathematical Formula Applicable to MiCOM Relays: The calculation of the Time to Trip is given by:   θ −   t Trip = Te In  ...

  • Page 226: Undercurrent Protection (P126 & P127)

    P12y/EN AP/D32 Application Guide Page 28/74 MiCOM P125/P126 & P127 Other plant equipment: Time constant τ (minutes) Limits Dry-type transformers Rating < 400 kVA 60 - 90 Rating 400 - 800 kVA Air-core reactors Capacitor banks Cross section ≥ 100 mm Overhead lines or 150mm²...

  • Page 227: Negative Sequence Overcurrent Protection (P126 & P127)

    Application Guide P12y/EN AP/D32 MiCOM P125/P126 & P127 Page 29/74 Negative Sequence Overcurrent Protection (P126 & P127) When applying traditional phase overcurrent protection, the overcurrent elements must be set higher than maximum load current, thereby limiting the sensitivity of the element. Most protection techniques also use an earth fault element operating from residual current, which improves sensitivity for earth faults.
  • Page 228 Application Guide Page 30/74 MiCOM P125/P126 & P127 It must be ensured that the time delay is set longer than the operating time of any other protective device (at minimum fault level) on the system, which may respond to unbalanced faults, such as: •...

  • Page 229: Voltage Protections

    Application Guide P12y/EN AP/D32 MiCOM P125/P126 & P127 Page 31/74 VOLTAGE PROTECTIONS Setting for the Voltage Connections For the P127, it is important to select the VTs configuration in the Configuration/ General Options/ VT Connection submenu in according to the relay wiring for a corrected functionality of the voltage protections.

  • Page 230: Voltage Measurement Displayed

    P12y/EN AP/D32 Application Guide Page 32/74 MiCOM P125/P126 & P127 Voltage Measurement displayed Here is a summary table of the measured parameters in according to the configuration scheme: Configuration Displayed Configuration Displayed on Configuration Displayed on 3Vpn on HMI 2Vpn+Vr...

  • Page 231: 27) Undervoltage Protection (P127)

    Application Guide P12y/EN AP/D32 MiCOM P125/P126 & P127 Page 33/74 3.4.1 Setting Guidelines The voltage setting applied to the protection elements is dependent upon the magnitude of residual voltage that is expected to occur during an earth fault condition. This in turn is dependent upon the method of system earthing employed. It must also be ensured that the relay is set above any standing level of residual voltage that is present on the system.

  • Page 232: 59) Overvoltage Protection (P127)

    P12y/EN AP/D32 Application Guide Page 34/74 MiCOM P125/P126 & P127 When OR operating logic is set and one or more voltage values fall below the threshold value, the tripping command is sent after the tripping timer has reached the set overtime condition.

  • Page 233: Description And Setting Guide Of The Autoreclose Function (P126 & P127)

    Application Guide P12y/EN AP/D32 MiCOM P125/P126 & P127 Page 35/74 DESCRIPTION AND SETTING GUIDE OF THE AUTORECLOSE FUNCTION (P126 & P127) An analysis of faults on any overhead line network has shown that 80 - 90% are transient in nature. A transient fault, such as an insulator flashover, is a self-clearing ‘non-damage’ fault.
  • Page 234 P12y/EN AP/D32 Application Guide Page 36/74 MiCOM P125/P126 & P127 The next figure shows an example of 4 autoreclose cycles (maximum numbers of allowed cycles) to the final trip: tD1, tD2, tD3, tD4 = dead time 1, 2, 3 and 4 timers...

  • Page 235: Available Settings

    Application Guide P12y/EN AP/D32 MiCOM P125/P126 & P127 Page 37/74 Available Settings The setting parameters are listed in the table below. MENU TEXT SETTING RANGE STEP SIZE PROTECTION G1 Autoreclose? YES/NO Ext CB Fail? Ext CB Fail Time 000.01 ms 600, 00 sec 0.01 sec...

  • Page 236: Functionality

    P12y/EN AP/D32 Application Guide Page 38/74 MiCOM P125/P126 & P127 Functionality 4.2.1 Activation Firstly if you want to utilise the ARC (Autoreclose) you have to set the parameters in correct way. If you do not execute correctly the setting, on the LCD of the relay an Alarm Message appears indicating:“Conflict Recloser”.
  • Page 237 Application Guide P12y/EN AP/D32 MiCOM P125/P126 & P127 Page 39/74 Reclaim Time tR When the tD timer is expired, a close command is launched to the CB by an output relay, the reclaim time (tR) will begin to count when the 52a input will be energized. It will mean that the CB is closed.
  • Page 238 P12y/EN AP/D32 Application Guide Page 40/74 MiCOM P125/P126 & P127 Cycles 4321 4321 tI> 0000 2222 0/1/2 Cycles 4321 4321 tI>> 0000 2222 0/1/2 Cycles 4321 4321 tI>>> 0000 2222 0/1/2 Cycles 4321 4321 tIe> 0000 2222 0/1/2 Cycles 4321 4321 tIe>>...
  • Page 239 Application Guide P12y/EN AP/D32 MiCOM P125/P126 & P127 Page 41/74 Cycles 4321 4321 4321 4321 tI> 0000 0011 0011 0010 Cycles 4321 4321 4321 4321 tI>> 0000 0200 1200 1000 Cycles 4321 4321 4321 4321 tI>>> 0010 0002 2010 0021...

  • Page 240: Re-Closer Lockout

    P12y/EN AP/D32 Application Guide Page 42/74 MiCOM P125/P126 & P127 4.2.3 Re-closer Lockout If protection operates during the reclaim time, following the final re-close attempt, the relay will lockout and the autoreclose function is disabled until the lockout condition is removed.

  • Page 241: Leds For The Arc (Led Submenu)

    Application Guide P12y/EN AP/D32 MiCOM P125/P126 & P127 Page 43/74 4.2.6 Leds for the ARC (Led submenu) The ARC function provides a signal light information by the leds from 5 to 8 on the front panel of the relay the following information: Recloser Run equivalent to 79 Run and Recloser Blocked equivalent to 79 Trip.

  • Page 242: Number Of Shots

    P12y/EN AP/D32 Application Guide Page 44/74 MiCOM P125/P126 & P127 4.2.9 Number Of Shots There are no clear-cut rules for defining the number of shots for a particular application. Generally medium voltage systems utilize only two or three shot autoreclose schemes.
  • Page 243 Application Guide P12y/EN AP/D32 MiCOM P125/P126 & P127 Page 45/74 Where high-speed re-closing is required, which is true for the majority of medium voltage applications, the circuit breaker mechanism itself dictates the minimum dead time. However, the fault de-ionizing time may also have to be considered. High-speed autoreclose may be required to maintain stability on a network with two or more power sources.

  • Page 244: Fuse Application

    P12y/EN AP/D32 Application Guide Page 46/74 MiCOM P125/P126 & P127 • If this condition arose, a permanent fault would effectively look like a number of transient faults, resulting in continuous autoreclose operations unless additional measures were taken to overcome this, such as excessive fault frequency lockout protection.
  • Page 245 Application Guide P12y/EN AP/D32 MiCOM P125/P126 & P127 Page 47/74 The sequence is the following. Fault on the line protected by the fuse. Istantaneous trip of the I>> and opening of the CB. tD1 in progress; tD1 is expired Closing of the CB and start of the tR.

  • Page 246: Automatic Control Functions

    P12y/EN AP/D32 Application Guide Page 48/74 MiCOM P125/P126 & P127 AUTOMATIC CONTROL FUNCTIONS Trip Commands This menu is used to assign the trip of the protection and the automatic control function to the relay 1. See the P12y/EN FT (User Guide).

  • Page 247: Example Setting

    Application Guide P12y/EN AP/D32 MiCOM P125/P126 & P127 Page 49/74 5.3.2 Example Setting The following information was recorded by the relay during commissioning: full load = 500A I2 = 50A therefore the quiescent ratio for I2/I1 is given by: I2/I1 = 50/500 = 0.1...

  • Page 248: Motor Feeders

    P12y/EN AP/D32 Application Guide Page 50/74 MiCOM P125/P126 & P127 5.4.2 Motor Feeders In general, a dedicated motor protection device, such as the MiCOM P220, P225 or P241 relays should protect feeders supplying motor loads. However, if no specific protection has been applied (possibly due to economic reasons) then the CLP function in the MiCOM P126 or P127 relay may be used to modify the overcurrent settings accordingly during starting.

  • Page 249: Selective Scheme Logic (P126 & P127)

    Application Guide P12y/EN AP/D32 MiCOM P125/P126 & P127 Page 51/74 Selective Scheme Logic (P126 & P127) The following figure describes the use of non-cascade protection schemes using the start contacts from downstream relays to block operation of upstream relays. In the case of Selective Overcurrent Logic (SOL), the start contacts are used to increase the time delays of upstream relays, instead of blocking them.

  • Page 250: Blocking Logic Function (Blocked Directional/Non Directional Overcurrent Protection)

    P12y/EN AP/D32 Application Guide Page 52/74 MiCOM P125/P126 & P127 Blocking logic function (Blocked directional/non directional overcurrent protection) The directional non directional overcurrent and overcurrent protection are applicable for radial feeder circuits where there is small or no back feed.

  • Page 251: Circuit Breaker State Monitoring

    Application Guide P12y/EN AP/D32 MiCOM P125/P126 & P127 Page 53/74 Circuit Breaker State Monitoring An operator at a remote location requires a reliable indication of the state of the switchgear. Without an indication that each circuit breaker is either open or closed, the operator has insufficient information to decide on switching operations.

  • Page 252: Setting Guidelines

    P12y/EN AP/D32 Application Guide Page 54/74 MiCOM P125/P126 & P127 5.10.1 Setting Guidelines 5.10.1.1 Setting the Σ I Thresholds Where overhead lines are prone to frequent faults and are protected by oil circuit breakers (OCB), oil changes account for a large proportion of the life cycle cost for the switchgear.

  • Page 253: Circuit Breaker Failure Protection Mechanism

    Application Guide P12y/EN AP/D32 MiCOM P125/P126 & P127 Page 55/74 5.11.1 Circuit Breaker Failure Protection Mechanism The CB failure protection included in both MiCOM P126 & P127 relays is performed as follows. The tBF timer is initiated when a trip order is issued through the logic output RL1 or by an assigned digital input (start tBFl).

  • Page 254: Trip Circuit Supervision (P126 & P127)

    P12y/EN AP/D32 Application Guide Page 56/74 MiCOM P125/P126 & P127 5.12 Trip Circuit Supervision (P126 & P127) The trip circuit extends beyond the relay enclosure and passes through more components, such as fuses, links, relay contacts, auxiliary switch contacts and so on.
  • Page 255 Application Guide P12y/EN AP/D32 MiCOM P125/P126 & P127 Page 57/74 Example 1 In this example only the 52a auxiliary contact is available, the MiCOM P126 & P127 relays monitor the trip coil whatever the CB status (CB open or CB closed ).
  • Page 256 P12y/EN AP/D32 Application Guide Page 58/74 MiCOM P125/P126 & P127 Example 3 In this example both 52a and 52b auxiliary contacts are available, the MiCOM P126 & P127 relays monitor the complete trip circuit whatever the CB status (CB open or CB closed).

  • Page 257: External Resistor R1 Calculation

    Application Guide P12y/EN AP/D32 MiCOM P125/P126 & P127 Page 59/74 5.12.2 External Resistor R1 Calculation The calculation of the R1 resistor value will take into account that a minimum current is flowing through the logic input. This minimum current value is a function of the relay auxiliary voltage range (Ua).

  • Page 258: Switch Onto Fault Protection & Trip On Reclose (Sotf/Tor) (P126 & P127)

    P12y/EN AP/D32 Application Guide Page 60/74 MiCOM P125/P126 & P127 5.13 Switch onto Fault Protection & Trip on Reclose (SOTF/TOR) (P126 & P127) 5.13.1 General It can happen, in particular plan conditions that when the feeder is supplied by the closing of the CB a fast tripping may be required if a fault is present.
  • Page 259 Application Guide P12y/EN AP/D32 MiCOM P125/P126 & P127 Page 61/74 SOTF/TOR tI > tI >> > tI >>> Trip I>> > Enable SOTF/TOR of I>> & AR close MAN close > > TC close 500 ms Settable delay time from 0 to 500ms I>>>...

  • Page 260: Local/Remote Conditioning (P125, P126 & P127)

    P12y/EN AP/D32 Application Guide Page 62/74 MiCOM P125/P126 & P127 AUTOMATIC CTRL / TRIP COMMAND SUBMENU Assigning the SOTF functionality to the trip output. Trip SOTF When the t SOTF is elapsed the trip command is launched Setting choice: Yes, No AUTOMATIC CTRL / OUTPUT RELAYS SUBMENU Assigning the SOTF functionality to the output relays;...
  • Page 261 Application Guide P12y/EN AP/D32 MiCOM P125/P126 & P127 Page 63/74 Below the involved settings for the Local/Remote feature AUTOMATIC CTRL / TRIP COMMAND SUBMENU Assigning the control by remote to the trip output. Ctrl Trip Setting choice: Yes, No AUTOMATIC CTRL / OUTPUT RELAYS SUBMENU Assigning the Control Trip command to the output relays;...

  • Page 262: And Logic Functions (P126 & P127)

    P12y/EN AP/D32 Application Guide Page 64/74 MiCOM P125/P126 & P127 5.15 AND Logic Functions (P126 & P127) AND logic functions are included in MiCOM P126 and P127 relays. They can be used to combine trip or start protection conditions to obtain dedicated functionality and combined output thresholds.

  • Page 263: Records (P126 & P127)

    Application Guide P12y/EN AP/D32 MiCOM P125/P126 & P127 Page 65/74 RECORDS (P126 & P127) Event Records The relay records and time tags up to 75 events and stores them in a non-volatile (battery back-up) memory. This enables the system operator to analyse the sequence of events that occurred within the relay following a particular power system condition, switching sequence etc.

  • Page 264: Rolling And Peak Value Demands

    P12y/EN AP/D32 Application Guide Page 66/74 MiCOM P125/P126 & P127 ROLLING AND PEAK VALUE DEMANDS (P126 & P127 The MiCOM P126 and P127 relays are able to store the 3 phases rolling average and maximum subperiod values. The description and principle of calculation are given bellow.

  • Page 265: Peak Value Demand

    Application Guide P12y/EN AP/D32 MiCOM P125/P126 & P127 Page 67/74 Peak value demand The principle of the calculation of the Peak value demand for IA, IB and IC currents is following : Every "Rolling Sub Period", a new average value is compared with the previous value calculated at the previous "Rolling Sub Period".

  • Page 266: Setting Group Selection (P125, P126 & P127)

    Page 68/74 MiCOM P125/P126 & P127 SETTING GROUP SELECTION (P125, P126 & P127) The MiCOM P125, P126 and P127 relays have two protection related setting groups named PROTECTION G1 and PROTECTION G2. Only one of two setting groups is active. Changes...

  • Page 267: Measurements

    MiCOM P125/P126 & P127 Page 69/74 MEASUREMENTS The measurement functions on MiCOM P125, P126 and P127 relays are described in chapter User Guide of this Technical Guide. Particular attention is to be given to the power and energy measurement. Power and Energy Measurements (P127) The MiCOM P127 relay provides the measurements function for active and reactive power and for active and reactive energy.
  • Page 268 P12y/EN AP/D32 Application Guide Page 70/74 MiCOM P125/P126 & P127 Following is the MiCOM P127 relay measurement menu for the power and energy. Displays the active power; only negative sign is shown. The maximum measured value displayed is 9999MW. 0.00 kW If the measured value is above 9999MW this display remains on the LCD.

  • Page 269: Logic Inputs And Logic Outputs

    Application Guide P12y/EN AP/D32 MiCOM P125/P126 & P127 Page 71/74 LOGIC INPUTS AND LOGIC OUTPUTS 10.1 Logic Inputs In the logic input submenu can be set the digital inputs as active high or active low, can be chosen the supply type DC or AC and it is possible to set the start/stop of the relevant auxiliary timers assigned to the inputs by front or edge..

  • Page 270: Maintenance Mode

    P12y/EN AP/D32 Application Guide Page 72/74 MiCOM P125/P126 & P127 MAINTENANCE MODE This menu allows the user to verify the operation of the protection functions without sending any external order (Tripping or signalling). The selection of the maintenance mode is possible by logic input, control command (rear or front port), or by front display.

  • Page 271: Ct Requirements

    Application Guide P12y/EN AP/D32 MiCOM P125/P126 & P127 Page 73/74 CT REQUIREMENTS The CT requirements for the MiCOM P12y relays are given below. The current transformer requirements are based on a maximum prospective fault current of 50 times the relay rated current (In) and the relay having an instantaneous setting of 25 times rated current (In).
  • Page 272 P12y/EN AP/D32 Application Guide Page 74/74 MiCOM P125/P126 & P127 Abbreviations used in the previous formulae are explained below: Where : Required CT knee-point voltage (volts), Maximum prospective secondary earth fault current (amps), Maximum prospective secondary phase fault current (amps), Maximum prospective secondary earth fault current or 31 times I>...
  • Page 273 Commissioning and Maintenance P12y/EN CM/C22 MiCOM P125/P126 & P127 COMMISSIONING AND MAINTENANCE GUIDE...
  • Page 275 Commissioning and Maintenance P12y/EN CM/C22 MiCOM P125/P126 & P127 Page 1/24 CONTENT REQUIREMENTS PRIOR TO COMMISSIONING COMMISSIONING TEST ENVIRONMENT Important notes 2.1.1 Injection test sets 2.1.2 Communication Commissioning test sheets PRODUCT VERIFICATION TESTS Allocation of terminals Electrostatic discharge (ESD) Visual inspection...
  • Page 276 P12y/EN CM/C22 Commissioning and Maintenance Page 2/24 MiCOM P125/P126 & P127 MAINTENANCE Equipment failure 5.1.1 Minor fault 5.1.2 Major fault 5.1.3 Hardware and software faults Method of repair 5.2.1 Replacing the active part 5.2.2 Replacing the complete relay 5.2.3 Changing the battery (MiCOM P126 & P127 only) Problem solving 5.3.1...

  • Page 277: Requirements Prior To Commissioning

    Page 3/24 REQUIREMENTS PRIOR TO COMMISSIONING The MiCOM P125 P126 and P127 relays are fully numerical in their design, implementing all protection and non-protection functions in software. The MiCOM relays employ a high degree of self-checking and, in the unlikely event of a failure, will provide an alarm. As a result of this, the commissioning test does not need to be as extensive as with non-numerical relays (static or electromechanical).

  • Page 278: Commissioning Test Environment

    COMMISSIONING TEST ENVIRONMENT Important notes All the commissioning tests of the MiCOM P125, P126, and P127 relays are carried out by injecting currents and voltages to the secondary of the earth and/or phases CTs and VTs using appropriate injection test sets provided for this purpose.

  • Page 279: Commissioning Test Sheets

    The contents of these Commissioning test sheets enable you to log : − The name of the relay, station and circuit − The characteristics of the MiCOM P125, P126 and P127 relays − The various settings − The results of the protection and automation checks −...

  • Page 280: Product Verification Tests

    P12y/EN CM/C22 Commissioning and Maintenance Page 6/24 MiCOM P125/P126 & P127 PRODUCT VERIFICATION TESTS Allocation of terminals It is necessary to consult the appropriate wiring diagram provided in the chapter P12y/EN CO of this Technical Guide whilst observing the various polarities and ground/earth connection.

  • Page 281: Use Of A Core Balance Ct For Earth Faults

    Commissioning and Maintenance P12y/EN CM/C22 MiCOM P125/P126 & P127 Page 7/24 Use of a Core Balance CT for earth faults If a core balance CT is used to detect earth faults, prior to any test, the user must check the following points: −...

  • Page 282: Auxiliary Supply

    Check the value of the auxiliary supply voltage (terminals 33 and 34). The value measured shall be between 0.8 and 1.2 times the nominal auxiliary supply voltage indicated on the MiCOM P125, P126 and P127. You can read the Uax range of the relay under the flap on the top of front relay.
  • Page 283 Commissioning and Maintenance P12y/EN CM/C22 MiCOM P125/P126 & P127 Page 9/24 Logic outputs This test checks that all output relays are functioning correctly. The P126 and P127 relays have 8 outputs, P125 relay has 6 outputs. The watch dog relay is always on. In case of relay failure the watch dog relay moves to the off and the terminals 35-36 are opened.

  • Page 284: Setting Check

    Settings Log the settings on the commissioning test sheets. Measurements The MiCOM P125 P126 P127 relays measure phase and earth currents, phase (phase to phase) voltage, zero sequence voltage as a True RMS value up to the 10 harmonics. The value(s) indicated take account of the phase and/or earth CT ratio and VT ratio.

  • Page 285: Micom P126

    Commissioning and Maintenance P12y/EN CM/C22 MiCOM P125/P126 & P127 Page 11/24 4.2.2 MiCOM P126 • Note the select phase and earth CTs ratio and neutral VT ratio. • Energise the MiCOM P126 relay. • Apply current to input terminals 49-50 (In=1A) or 41-42 (In=5A) and verify the IA value shown on the LCD.

  • Page 286: Thresholds Validation

    P12y/EN CM/C22 Commissioning and Maintenance Page 12/24 MiCOM P125/P126 & P127 Thresholds validation This test type demonstrates that the relay is operating correctly at the application specific settings. 4.3.1 MiCOM settings Set the following thresholds for the relay. Applying the voltage and current to terminals as in wiring diagrams in chapter P12y/EN CO of this Technical Guide.
  • Page 287 Commissioning and Maintenance P12y/EN CM/C22 MiCOM P125/P126 & P127 Page 13/24 4.3.3 MiCOM P126 Settings Configuration menu Transfo. Ratio Line CT primary Line CT Sec E/Gnd CT primary E/Gnd CT Sec E/Gnd VT primary 0.100 kV E/Gnd VT Sec 100.0 V Protection Menu G1 I>...

  • Page 288: Micom P127 Settings

    P12y/EN CM/C22 Commissioning and Maintenance Page 14/24 MiCOM P125/P126 & P127 4.3.4 MiCOM P127 settings CONFIGURATION General Options 2Vpp+Vr Transfo. Ratio Line CT primary Line CT Sec E/Gnd CT primary E/Gnd CT Sec Line VT primary 0.100 kV Line VT Sec 100.0 V...

  • Page 289: Earth Current And Neutral Voltage Test

    Commissioning and Maintenance P12y/EN CM/C22 MiCOM P125/P126 & P127 Page 15/24 4.3.5 Earth current and neutral voltage test This test can be executed on the P125, P126 and P127 relay and the operating sequence is the same for all three relays.
  • Page 290 P12y/EN CM/C22 Commissioning and Maintenance Page 16/24 MiCOM P125/P126 & P127 IEC curves Type of curve Tripping time (in seconds) for TMS =1 2 x I threshold 10 x I threshold Nominal Min - Max Nominal Min - Max 1.78 1.62 - 1.98...
  • Page 291 Commissioning and Maintenance P12y/EN CM/C22 MiCOM P125/P126 & P127 Page 17/24 Checks: • Alarm message on the LCD display. • Alarm LED flashes. • Trip LED on • I> threshold LED on (if programmed). • Trip output closes. • I> threshold output closes (if programmed).
  • Page 292 P12y/EN CM/C22 Commissioning and Maintenance Page 18/24 MiCOM P125/P126 & P127 IEEE/ANSI curves Type of curve Tripping time (in seconds) for TMS =1 IEEE/ANSI 2 x I threshold 10 x I threshold Nominal Min - Max Nominal Min - Max 0.25...

  • Page 293: Final Checks

    Commissioning and Maintenance P12y/EN CM/C22 MiCOM P125/P126 & P127 Page 19/24 Checks: • Alarm message on the LCD display for U> after that the setting trip delay time is expired. • Alarm LED flashes after that the setting trip delay time is expired.

  • Page 294: Maintenance

    LED. 5.1.1 Minor fault Regarded by the MiCOM P125, P126 and P127 relays as a minor fault is a communication failure. If the communication is in fault, MiCOM P125, P126 and P127 protection and automation modules are not affected.

  • Page 295: Method Of Repair

    Commissioning and Maintenance P12y/EN CM/C22 MiCOM P125/P126 & P127 Page 21/24 Method of repair 5.2.1 Replacing the active part The case and the rear terminals blocks have been designed to facilitate removal of the MiCOM P12x relay should replacement or repair become necessary without disconnect the scheme wiring.

  • Page 296: Problem Solving

    No response from MiCOM P125, P126 and P127 relays when asked by the supervision software without any communication fault message. Cause: Mainly, this type of problem is linked to an error in the MiCOM P125, P126 and P127 communication parameters. Action: Check MiCOM P125, P126 and P127 communication parameters (data rate, parity, etc.) are...

  • Page 297: A Remote Command Is Not Taken In Account

    Commissioning and Maintenance P12y/EN CM/C22 MiCOM P125/P126 & P127 Page 23/24 5.4.1 A remote command is not taken in account Problem : The communication between the relay and the PC is correct, but the relay does not accept any remote command or file downloading.
  • Page 298 P12y/EN CM/C22 Commissioning and Maintenance Page 24/24 MiCOM P125/P126 & P127 BLANK PAGE...
  • Page 299 Connections and Wiring Diagrams P12y/EN CO/C22 MiCOM P125/P126 & P127 CONNECTIONS AND WIRING DIAGRAMS...
  • Page 301 Connections and Wiring Diagrams P12y/EN CO/C22 MiCOM P125/P126 & P127 Page 1/10 CONTENT P125 REAR DESCRIPTION P125 wiring diagram P126/P127 REAR DESCRIPTION Scheme representing MiCOM P126 Scheme representing MiCOM P127 P126 & P127 CURRENT INSERTION SCHEMES P126 & P127 Holmgreen CT’s insertion...
  • Page 302 P12y/EN CO/C22 Connections and Wiring Diagrams Page 2/10 MiCOM P125/P126 & P127 BLANK PAGE...
  • Page 303 Connections and Wiring Diagrams P12y/EN CO/C22 MiCOM P125/P126 & P127 Page 3/10 P125 REAR DESCRIPTION Case earth Module terminal blocks viewed from rear (with integral case earth link) P0071ENa Output 5 Common output Case earth Terminal connection RS485 Common Output 1 (NC) RS485 + RS485 –...
  • Page 304 P12y/EN CO/C22 Connections and Wiring Diagrams Page 4/10 MiCOM P125/P126 & P127 P125 wiring diagram Scheme shows output relays off Watch Dog Phase rotation Auxiliary Voltage A B C Programmable tripping output Programmable output Programmable output 32N 50N 51N Programmable output...
  • Page 305 Connections and Wiring Diagrams P12y/EN CO/C22 MiCOM P125/P126 & P127 Page 5/10 P126/P127 REAR DESCRIPTION Case earth Module terminal blocks viewed from rear (with integral case earth link) P0072ENa Input 7 + 57 58 Input 6 + Output 5 2 Common...
  • Page 306 P12y/EN CO/C22 Connections and Wiring Diagrams Page 6/10 MiCOM P125/P126 & P127 Scheme representing MiCOM P126 Scheme represents relays off Phase rotation A B C Auxiliary Voltage 50BF Programmable input L1 Programmable input L2 Programmable input L3 Programmable input L4...
  • Page 307 Connections and Wiring Diagrams P12y/EN CO/C22 MiCOM P125/P126 & P127 Page 7/10 Scheme representing MiCOM P127 Scheme represents relays off Phase rotation A B C Auxiliary Voltage 50BF Programmable input L1 Programmable input L2 Programmable input L3 Programmable input L4...
  • Page 308 P12y/EN CO/C22 Connections and Wiring Diagrams Page 8/10 MiCOM P125/P126 & P127 P126 & P127 CURRENT INSERTION SCHEMES P126 & P127 Holmgreen CT’s insertion Three phases CTs (IA, IB, IC) + residual current by Holmgreen insertion Phase rotation MiCOM P126/P127...
  • Page 309 Connections and Wiring Diagrams P12y/EN CO/C22 MiCOM P125/P126 & P127 Page 9/10 P126 & P127 Two phases CT’s insertion Two phases CTs (IA, IC) + residual current insertion Phase rotation MiCOM P126/P127 P0102ENa...
  • Page 310 P12y/EN CO/C22 Connections and Wiring Diagrams Page 10/10 MiCOM P125/P126 & P127 BLANK PAGE...
  • Page 311 Commissioning Test and Record Sheet P12y/EN RS/D32 MiCOM P125/P126 & P127 COMMISSIONING TEST AND RECORD SHEET...
  • Page 313 Commissioning Test and Record Sheet P12y/EN RS/D32 MiCOM P125/P126 & P127 Page 1/48 CONTENT COMMISSIONING TEST Relay identification Commissioning test record Auxiliary supply control Measurements and analogue inputs control Introduction Phase overcurrent protection test Phase under current protection test Earth over current protection test Directional earth fault overcurrent 1.10...
  • Page 314 P12y/EN RS/D32 Commissioning Test and Record Sheet Page 2/48 MiCOM P125/P126 & P127 Voltage Protection (only P127) 3.8.1 Under voltage 3.8.2 Phase to neutral under voltage element 3.8.3 Over voltage 3.8.4 Phase to neutral over voltage element 3.8.5 Residual over voltage Automatic control functions 3.9.1...

  • Page 315: Commissioning Test

    Commissioning Test and Record Sheet P12y/EN RS/D32 MiCOM P125/P126 & P127 Page 3/48 COMMISSIONING TEST Relay identification Commissioning date : Engineer : Substation : Circuit : Network nominal frequency: P125 P126 P127 MiCOM relay model: Serial number: Rated current In :...

  • Page 316: Measurements And Analogue Inputs Control

    P12y/EN RS/D32 Commissioning Test and Record Sheet Page 4/48 MiCOM P125/P126 & P127 Measurements and analogue inputs control • Set the voltage wiring mode in CONFIGURATION/General options menu as 2Vpn+Vr (See User Guide ref. P12y/EN FT/XXX of this T.G.) •...

  • Page 317: Phase Overcurrent Protection Test

    Commissioning Test and Record Sheet P12y/EN RS/D32 MiCOM P125/P126 & P127 Page 5/48 Phase overcurrent protection test Type and setting threshold Value Delay Time Trip value in Drop value in in In applied in Setting I>: 0.2 x I> Type and setting threshold...

  • Page 318: Earth Over Current Protection Test

    P12y/EN RS/D32 Commissioning Test and Record Sheet Page 6/48 MiCOM P125/P126 & P127 Earth over current protection test Type and setting threshold Value Delay Time Trip value in Drop value in in Ien applied in Ien Setting Ie>: 0.2 x Ie>...

  • Page 319: Earth Fault Wattmetric Protection Test

    Commissioning Test and Record Sheet P12y/EN RS/D32 MiCOM P125/P126 & P127 Page 7/48 Below it is listed the guide table. Type and setting current stage Value Delay Time Measured Drop value for in Ien, Ue> in Volt, in degrees for...

  • Page 320: Over/Under Phase Voltage Protection Test

    P12y/EN RS/D32 Commissioning Test and Record Sheet Page 8/48 MiCOM P125/P126 & P127 1.11 Over/Under Phase voltage protection test Delay Type and setting threshold Value applied Trip value in Drop value in Time in Volt in Volt Volt Volt Setting U>:...

  • Page 321: Autoreclose Basic Test

    Commissioning Test and Record Sheet P12y/EN RS/D32 MiCOM P125/P126 & P127 Page 9/48 1.13 Autoreclose basic test From the 6A firmware version the ARC function follows the other ones of the Px20 range. The testing of this functionality requires a bit attention and some more setting.
  • Page 322 P12y/EN RS/D32 Commissioning Test and Record Sheet Page 10/48 MiCOM P125/P126 & P127 MENU TEXT SET FOR THE TEST Cycles 4321 tIe> 2222 Cycles 4321 tIe>> 0000 Cycles 4321 tIe>>> 0000 Cycles 4321 tPe/Iecos>, 0000 Cycles 4321 tPe/Iecos>> 0000 Cycles...

  • Page 323: Arc Test Procedure With Ti

    Commissioning Test and Record Sheet P12y/EN RS/D32 MiCOM P125/P126 & P127 Page 11/48 1.13.1 ARC test procedure with tI> − Close the CB and inject current the led 7 lights for 0.2 s. − After 1 sec the CB open tD1 start the led 8 lights −...

  • Page 324: Commissioning Record Sheet

    P12y/EN RS/D32 Commissioning Test and Record Sheet Page 12/48 MiCOM P125/P126 & P127 COMMISSIONING RECORD SHEET RELAY TYPE Setting Range P125 P126 P127 Step OP.PARAMETERS Password Alphabetic uppercase 4 characters Description Reference Alphanumeric uppercase characters Software Version ( X.X )
  • Page 325 Commissioning Test and Record Sheet P12y/EN RS/D32 MiCOM P125/P126 & P127 Page 13/48 RELAY TYPE Setting Range P125 P126 P127 Step tIe> Ie>> tIe>> Ie>>> tIe>>> Pe/IeCos> tPe/IeCos> Pe/IeCos>> tPe/IeCos>> I2> N.A. tI2> N.A. I2>> N.A. tI2>> N.A. I2>>> N.A.
  • Page 326 P12y/EN RS/D32 Commissioning Test and Record Sheet Page 14/48 MiCOM P125/P126 & P127 RELAY TYPE Setting Range P125 P126 P127 Step tAux1 tAux2 tSOTF N.A. Led 6 I> N.A. tI> N.A. I>> N.A. tI>> N.A. I>>> N.A. tI>>> N.A. tIA>...
  • Page 327 Commissioning Test and Record Sheet P12y/EN RS/D32 MiCOM P125/P126 & P127 Page 15/48 RELAY TYPE Setting Range P125 P126 P127 Step tU<< N.A. N.A. Ue>>>> tUe>>>> Brkn. Cond N.A. CB Fail N.A. Input 1 Input 2 Input 3 Input 4 Input 5 N.A.
  • Page 328 P12y/EN RS/D32 Commissioning Test and Record Sheet Page 16/48 MiCOM P125/P126 & P127 RELAY TYPE Setting Range P125 P126 P127 Step I2>> N.A. tI2>> N.A. I2>>> N.A. tI2>>> N.A. Ther. Trip N.A. I< N.A. tI< N.A. U> N.A. N.A. tU>...
  • Page 329 Commissioning Test and Record Sheet P12y/EN RS/D32 MiCOM P125/P126 & P127 Page 17/48 RELAY TYPE Setting Range P125 P126 P127 Step tIB> N.A. tIC> N.A. Ie> tIe> Ie>> tIe>> Ie>>> tIe>>> Pe/IeCos> tPe/IeCos> Pe/IeCos>> tPe/IeCos>> I2> N.A. tI2> N.A. I2>>...
  • Page 330 P12y/EN RS/D32 Commissioning Test and Record Sheet Page 18/48 MiCOM P125/P126 & P127 RELAY TYPE Setting Range P125 P126 P127 Step Recloser Run N.A. Recl. Blocked N.A. tAux1 tAux2 tSOTF N.A. Inputs Configuration Active Low ↓ or active High ↑...
  • Page 331 Commissioning Test and Record Sheet P12y/EN RS/D32 MiCOM P125/P126 & P127 Page 19/48 RELAY TYPE Setting Range P125 P126 P127 Step PROTECTION Group1- Group2 P127 [67/50/51] Directional/no Directional Phase Overcurrent; P126 [50/51] Three Phase Overcurrent Yes or DIR in P127;...
  • Page 332 P12y/EN RS/D32 Commissioning Test and Record Sheet Page 20/48 MiCOM P125/P126 & P127 RELAY TYPE Setting Range P125 P126 P127 Step [67N] Earth Fault Overcurrent High sensitivity: Current input from 0.002 to 1 Ien Cortec code P12-C-X---X Ie> No or Yes or Ie>...
  • Page 333 Commissioning Test and Record Sheet P12y/EN RS/D32 MiCOM P125/P126 & P127 Page 21/48 RELAY TYPE Setting Range P125 P126 P127 Step 220–480V Input voltage. Cortec code: P127CBX---X Ue>> 960 V 0.5 V Ie>>> No or Yes or DIR or Peak Ie>>>...
  • Page 334 P12y/EN RS/D32 Commissioning Test and Record Sheet Page 22/48 MiCOM P125/P126 & P127 RELAY TYPE Setting Range P125 P126 P127 Step Ie>> tReset 0.00 s 100 s 0.01 s Ie>> No or Yes or Ie>> R.C.A.(Torque Angle) 0° 359° 1°...
  • Page 335 Commissioning Test and Record Sheet P12y/EN RS/D32 MiCOM P125/P126 & P127 Page 23/48 RELAY TYPE Setting Range P125 P126 P127 Step DT or IDMT (IEC_STI, IEC_SI, IEC_VI, Delay type IEC_EI, IEC_LTI, C02, C08, IEEE_MI, IIEEE_VI, IEEE_EI, RI, RECT curve) Ie>> Trip delay time 150s 0.01s...
  • Page 336 P12y/EN RS/D32 Commissioning Test and Record Sheet Page 24/48 MiCOM P125/P126 & P127 RELAY TYPE Setting Range P125 P126 P127 Step Pe>> 0.2 x K W(*) 20 x K W(*) 0.02 x K W(*) tPe>> Trip delay time 150s 0.01s Pe>>...
  • Page 337 Commissioning Test and Record Sheet P12y/EN RS/D32 MiCOM P125/P126 & P127 Page 25/48 RELAY TYPE Setting Range P125 P126 P127 Step 220–480V Input voltage Cortec code: P12-BBX---X Pe> No or Pe> 4 x K W(*) 640 x K W(*) 0.5 x K W(*)
  • Page 338 P12y/EN RS/D32 Commissioning Test and Record Sheet Page 26/48 MiCOM P125/P126 & P127 RELAY TYPE Setting Range P125 P126 P127 Step 0.001 Pe> TMS 0.025 0.025 Pe> Reset char DT or IDMT Pe> RTMS 0.025 0.025 Pe> tReset 0.00 s 100 s 0.01 s...
  • Page 339 Commissioning Test and Record Sheet P12y/EN RS/D32 MiCOM P125/P126 & P127 Page 27/48 RELAY TYPE Setting Range P125 P126 P127 Step IeCos>> Trip delay time 150s 0.01s IeCos> tReset 0.00 s 100 s 0.01 s Pe/IeCos Angle 0° 359° 1°...
  • Page 340 P12y/EN RS/D32 Commissioning Test and Record Sheet Page 28/48 MiCOM P125/P126 & P127 RELAY TYPE Setting Range P125 P126 P127 Step [49] Thermal Overload Therm. OL N.A. N.A. No or N.A. N.A. 0.1 In 3.2 In 0.01 Iθ N.A. N.A.
  • Page 341 Commissioning Test and Record Sheet P12y/EN RS/D32 MiCOM P125/P126 & P127 Page 29/48 RELAY TYPE Setting Range P125 P126 P127 Step [59N] Residual Over voltage 57–130V Input voltage. Cortec code: P12—AX---X Ue>>>> No or Ue>>>> 260V 0.1V tUe>>>> 600 s 0.01 s...
  • Page 342 P12y/EN RS/D32 Commissioning Test and Record Sheet Page 30/48 MiCOM P125/P126 & P127 RELAY TYPE Setting Range P125 P126 P127 Step AUTOMAT. CTRL Trip Commands Trip tI> N.A. Trip tI>> N.A. Trip tI>>> N.A. Trip tIe> Trip tIe>> Trip tIe>>>...
  • Page 343 Commissioning Test and Record Sheet P12y/EN RS/D32 MiCOM P125/P126 & P127 Page 31/48 RELAY TYPE Setting Range P125 P126 P127 Step Blocking Logic Blocking Logic 1 / 2 Block tI> N.A. N.A. Block tI>> N.A. N.A. Block tI>>> N.A. N.A.
  • Page 344 P12y/EN RS/D32 Commissioning Test and Record Sheet Page 32/48 MiCOM P125/P126 & P127 RELAY TYPE Setting Range P125 P126 P127 Step I>>_R N.A. I>>> N.A. tI>>> N.A. I>>>_R N.A. tIA> N.A. tIB> N.A. tIC> N.A. Ie> tIe> Ie>_R Ie>> tIe>>...
  • Page 345 Commissioning Test and Record Sheet P12y/EN RS/D32 MiCOM P125/P126 & P127 Page 33/48 RELAY TYPE Setting Range P125 P126 P127 Step tUe>>>> Brkn. Cond N.A. CB Alarm N.A. 52 Fail N.A. CB Fail N.A. CB close N.A. tAux1 tAux2 tAux3...
  • Page 346 P12y/EN RS/D32 Commissioning Test and Record Sheet Page 34/48 MiCOM P125/P126 & P127 RELAY TYPE Setting Range P125 P126 P127 Step None, Unlatch, 52 a, 52 b, Blk Log 1, Blk Log 2, Aux 1, Aux 2, Aux 3, Aux 4, CB FLT, θ Reset, Input 7 N.A.
  • Page 347 Commissioning Test and Record Sheet P12y/EN RS/D32 MiCOM P125/P126 & P127 Page 35/48 RELAY TYPE Setting Range P125 P126 P127 Step ΣAmps(n) N.A. 0 Exp6 A 4000 Exp6 A 1 Ecp6 A N.A. CB Open pulse N.A. tOpen Pulse N.A.
  • Page 348 P12y/EN RS/D32 Commissioning Test and Record Sheet Page 36/48 MiCOM P125/P126 & P127 RELAY TYPE Setting Range P125 P126 P127 Step tU< N.A. N.A. U<< N.A. N.A. tU<< N.A. N.A. Ue>>>> tUe>>>> Brkn. Cond N.A. 79 Trip N.A. tAux 1...
  • Page 349 Commissioning Test and Record Sheet P12y/EN RS/D32 MiCOM P125/P126 & P127 Page 37/48 P126 & P127 FURTHER TESTS Introduction The following procedures are written for demonstrating the main protection functions of the MiCOM P126 (where possible) & P127 relays using an Omicron test or similar. The tests do not test the limits / boundaries of all available function characteristics.
  • Page 350 P12y/EN RS/D32 Commissioning Test and Record Sheet Page 38/48 MiCOM P125/P126 & P127 Non-directional overcurrent protection 3.7.1 Overcurrent sensitivity tests Object: The following tests verify that the relay overcurrent elements operate at the set thresholds. Test with the following relay settings (all thresholds set as non-directional): •...
  • Page 351 Commissioning Test and Record Sheet P12y/EN RS/D32 MiCOM P125/P126 & P127 Page 39/48 3.7.2.1 Pass Criteria For the relay to pass it shall operate as detailed below • DT operating time 1.0s ±2% • IDMT operating time: 10.070s ±2% at 2 In.
  • Page 352 P12y/EN RS/D32 Commissioning Test and Record Sheet Page 40/48 MiCOM P125/P126 & P127 3.7.4.1 Pass Criteria For the relay to pass it shall operate as detailed below. • DT operating time • 1.0s ±2% • IDMT operating time : •...
  • Page 353 Commissioning Test and Record Sheet P12y/EN RS/D32 MiCOM P125/P126 & P127 Page 41/48 3.7.6 Reset time test Repeat the test at the paragraph 6.8.1 using definite time setting the tIe> to 10s and Treset to 10s. Make the sequence: On Input current 2A, after 5s inject 0 A after 5 seconds again 2A 3.7.6.1...
  • Page 354 P12y/EN RS/D32 Commissioning Test and Record Sheet Page 42/48 MiCOM P125/P126 & P127 3.7.8 Neutral characteristic tests Object: The following tests verify that the relay earth fault elements trip in the correct time. Test with the following relay settings: •...
  • Page 355 Commissioning Test and Record Sheet P12y/EN RS/D32 MiCOM P125/P126 & P127 Page 43/48 3.7.9.1 Pass Criteria For the relay to pass the following must be satisfied: The directional decision shall be from the following equations: Directional forward -80° < RCA (Torque angle) < 80°...

  • Page 356: Voltage Protection (Only P127)

    P12y/EN RS/D32 Commissioning Test and Record Sheet Page 44/48 MiCOM P125/P126 & P127 3.7.11 Negative sequence overcurrent Object: To verify that the negative sequence overcurrent operation is recorded as a fault record. Test with the following relay settings: • DT time Delay •...

  • Page 357: Phase To Neutral Under Voltage Element

    Commissioning Test and Record Sheet P12y/EN RS/D32 MiCOM P125/P126 & P127 Page 45/48 3.8.2 Phase to neutral under voltage element Test with the following relay settings: • U< Enable stage 1 over voltage and apply rated three phase voltages (57.7V per phase) to the relay.

  • Page 358: Automatic Control Functions

    P12y/EN RS/D32 Commissioning Test and Record Sheet Page 46/48 MiCOM P125/P126 & P127 Automatic control functions 3.9.1 Trip circuit supervision Connect the coil of the external auxiliary relay as the example in the Technical Guide P12y/EN AP page 55. + Vdc...

  • Page 359: Cold Load Pick-Up

    Commissioning Test and Record Sheet P12y/EN RS/D32 MiCOM P125/P126 & P127 Page 47/48 The relay shall be configured with trip commands relay assigned to t_I>, with relay 2 assigned to CB fail function and with relay 2 assigned as latched.
  • Page 360 P12y/EN RS/D32 Commissioning Test and Record Sheet Page 48/48 MiCOM P125/P126 & P127 BLANK PAGE...
  • Page 362 AREVA T&D's Automation & Information Systems Business www.areva-td.com T&D Worldwide Contact Centre online 24 hours a day: +44 (0) 1785 25 00 70 http://www.areva-td.com/contactcentre/...

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