P44x/EN CM/E33
Commissioning
Page 44/54
MiCOM P441/P442 & P444
8.3 Method
of
Repair
If the relay should develop a fault whilst in service, depending on the nature of the fault, the
watchdog contacts will change state and an alarm condition will be flagged. Due to the
extensive use of surface-mount components faulty PCBs should be replaced as it is not
possible to perform repairs on damaged circuits. Thus either the complete relay or just the
faulty PCB, identified by the in-built diagnostic software, can be replaced. Advice about
identifying the faulty PCB can be found in Chapter P44x/EN PR, ‘Problem Analysis’.
The preferred method is to replace the complete relay as it ensures that the internal circuitry
is protected against electrostatic discharge and physical damage at all times and overcomes
the possibility of incompatibility between replacement PCBs. However, it may be difficult to
remove an installed relay due to limited access in the back of the cubicle and rigidity of the
scheme wiring.
Replacing PCBs can reduce transport costs but requires clean, dry conditions on site and
higher skills from the person performing the repair. However, if the repair is not performed
by an approved service centre, the warranty will be invalidated.
BEFORE CARRYING OUT ANY WORK ON THE EQUIPMENT, THE USER SHOULD BE
FAMILIAR WITH THE ‘SAFETY SECTION’ AND CHAPTER P44x/EN IN, ‘INSTALLATION’,
OF THIS MANUAL. THIS SHOULD ENSURE THAT NO DAMAGE IS CAUSED BY
INCORRECT HANDLING OF THE ELECTRONIC COMPONENTS.
8.3.1
Replacing the Complete Relay
The case and rear terminal blocks have been designed to facilitate removal of the complete
relay should replacement or repair become necessary without having to disconnect the
scheme wiring.
Before working at the rear of the relay, isolate all voltage and current supplies to the relay.
NOTE:
The MiCOM range of relays have integral current transformer shorting
switches which will close when the heavy duty terminal block is
removed.
Disconnect the relay earth connection from the rear of the relay.
There are two types of terminal block used on the relay, medium and heavy duty, which are
fastened to the rear panel using crosshead screws.
NOTE:
The use of a magnetic bladed screwdriver is recommended to
minimise the risk of the screws being left in the terminal block or lost.
Without exerting excessive force or damaging the scheme wiring, pull the terminal blocks
away from their internal connectors.
Remove the screws used to fasten the relay to the panel, rack, etc. These are the screws
with the larger diameter heads that are accessible when the access covers fitted and open.
IF THE TOP AND BOTTOM ACCESS COVERS HAVE BEEN REMOVED, DO NOT
REMOVE THE SCREWS WITH THE SMALLER DIAMETER HEADS WHICH ARE
ACCESSIBLE. THESE SCREWS HOLD THE FRONT PANEL ON THE RELAY.
Withdraw the relay from the panel, rack, etc. carefully because it will be heavy due to the
internal transformers.
To reinstall the repaired or replacement relay follow the above instructions in reverse,
ensuring that each terminal block is relocated in the correct position and the case earth,
IRIG-B and fibre optic connections are replaced.
Once reinstallation is complete the relay should be recommissioned using the instructions in
sections 1 to 7 inclusive of this chapter.
Содержание MiCOM P441
Страница 1: ...MiCOM P441 P442 P444 Numerical Distance Protection VC2 x Technical Guide P44x EN T E44...
Страница 2: ......
Страница 4: ...P44x EN T E44 Technical Guide Page 2 2 MiCOM P441 P442 P444 BLANK PAGE...
Страница 5: ...Pxxxx EN SS C11 SAFETY SECTION...
Страница 6: ......
Страница 8: ...Pxxxx EN SS C11 Page 2 10 Safety Section BLANK PAGE...
Страница 17: ...Update Documentation P44x EN AD E44 MiCOM P441 P442 P444 UPDATE DOCUMENTATION VERSION C2 X...
Страница 18: ......
Страница 22: ...P44x EN AD E44 Update Documentation Page 4 82 MiCOM P441 P442 P444 BLANK PAGE...
Страница 23: ...Update Documentation P44x EN AD E44 MiCOM P441 P442 P444 Page 5 82 P44X EN IT E33 INTRODUCTION...
Страница 24: ......
Страница 33: ...Update Documentation P44x EN AD E44 MiCOM P441 P442 P444 Page 15 82 P44X EN HW E33 RELAY DESCRIPTION...
Страница 34: ......
Страница 43: ...Update Documentation P44x EN AD E44 MiCOM P441 P442 P444 Page 25 82 APPLICATION GUIDE P44X EN AP E33...
Страница 44: ......
Страница 96: ...P44x EN AD E44 Update Documentation Page 78 82 MiCOM P441 P442 P444 BLANK PAGE...
Страница 97: ...Update Documentation P44x EN AD E44 MiCOM P441 P442 P444 Page 79 82 TECHNICAL DATA P44X EN TD E33...
Страница 98: ......
Страница 100: ...P44x EN AD E44 Update Documentation Page 82 82 MiCOM P441 P442 P444 BLANK PAGE...
Страница 101: ...Introduction P44x EN IT E33 MiCOM P441 P442 P444 INTRODUCTION...
Страница 102: ......
Страница 104: ...P44x EN IT E33 Introduction Page 2 24 MiCOM P441 P442 P444 BLANK PAGE...
Страница 127: ...Relay Description P44x EN HW E33 MiCOM P441 P442 P444 RELAY DESCRIPTION...
Страница 128: ......
Страница 132: ...P44x EN HW E33 Relay Description Page 4 44 MiCOM P441 P442 P444 BLANK PAGE...
Страница 152: ...P44x EN HW E33 Relay Description Page 24 44 MiCOM P441 P442 P444 Example isolated AC fault...
Страница 153: ...Relay Description P44x EN HW E33 MiCOM P441 P442 P444 Page 25 44...
Страница 173: ...Application Notes P44x EN AP E33 MiCOM P441 P442 P444 APPLICATION NOTES...
Страница 174: ......
Страница 180: ...P44x EN AP E33 Application Notes Page 6 220 MiCOM P441 P442 P444 BLANK PAGE...
Страница 357: ...Application Notes P44x EN AP E33 MiCOM P441 P442 P444 Page 183 220...
Страница 364: ...P44x EN AP E33 Application Notes Page 190 220 MiCOM P441 P442 P444 BLANK PAGE...
Страница 394: ...P44x EN AP E33 Application Notes Page 220 220 MiCOM P441 P442 P444 BLANK PAGE...
Страница 395: ...Technical Data P44x EN TD E33 MiCOM P441 P442 P444 TECHNICAL DATA...
Страница 396: ......
Страница 400: ...P44x EN TD E33 Technical Data Page 4 30 MiCOM P441 P442 P444 BLANK PAGE...
Страница 427: ...Installation P44x EN IN E33 MiCOM P441 P442 P444 INSTALLATION...
Страница 428: ......
Страница 430: ...P44x EN IN E33 Installation Page 2 10 MiCOM P441 P442 P444 BLANK PAGE...
Страница 438: ...P44x EN IN E33 Installation Page 10 10 MiCOM P441 P442 P444 BLANK PAGE...
Страница 439: ...Commissioning P44x EN CM E33 MiCOM P441 P442 P444 COMMISSIONING...
Страница 440: ......
Страница 494: ...P44x EN CM E33 Commissioning Page 54 54 MiCOM P441 P442 P444 BLANK PAGE...
Страница 495: ...Commissioning Test Record Sheets P44x EN RS E33 MiCOM P441 P442 P444 COMMISSIONING TEST RECORD SHEETS...
Страница 496: ......
Страница 498: ...P44x EN RS E33 Commissioning Test Record Sheets Page 2 10 MiCOM P441 P442 P444 BLANK PAGE...
Страница 507: ...Connection Diagrams P44x EN CO E33 MiCOM P441 P442 P444 CONNECTION DIAGRAMS...
Страница 508: ......
Страница 510: ...P44x EN CO E33 Connection Diagrams Page 2 12 MiCOM P441 P442 P444 BLANK PAGE...
Страница 520: ...P44x EN CO E33 Connection Diagrams Page 12 12 MiCOM P441 P442 P444 BLANK PAGE...
Страница 521: ...Courrier Data Base P44x EN GC E44 MiCOM P441 P442 P444 CONFIGURATION MAPPING...
Страница 610: ...Courier Data Base P44x EN GC E44 MiCOM P441 P442 P444 DEFAULT PROGRAMMABLE SCHEME LOGIC PSL...
Страница 615: ...Menu Content Tables P44x EN HI E44 MiCOM P441 P442 P444 MENU CONTENT TABLES...
Страница 616: ......
Страница 624: ......
Страница 626: ......
Страница 634: ...P44x EN VC E44 Hardware Software Version Page 8 8 MiCOM P441 P442 P444 BLANK PAGE...
Страница 635: ......