P12x/EN CM/A96
Commissioning and Maintenance
Page 16/18
MiCOM P120/P121/P122/P123
5.1.2.1
Hardware and software faults
Messages:
"DEFAULT SETTING": Indication that the relay is running with default setting
"SETTING ERROR": Failure in the setting
" CALIBRATION ERROR.": Calibration zone failure
"CT ERROR": Analogue channel failure
Cause:
Hardware or software failure
Action:
Restart the protection software (refer § 5.3).
If the software fault still remain after restart, withdraw the active part and return the module
to the factory for repair.
5.2 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.
NOTE:
The MiCOM range of relays have integral current transformer shorting
switches which will close when the active part is removed from the
case.
Remove the upper and lower flap without exerting excessive force. Remove the external
screws. Under the upper flap, turn the extractor with a 3 mm screwdriver and extract the
active part of the relay by pulling from the upper and lower notches on the front panel of the
MiCOM relay.
The reinstall the repaired or replacement relay follow the above instruction in reverse,
ensuring that no modification has been done on the scheme wiring.
On completion of any operations which require the relay to be removed from its case, verify
that the four fixing screws are fitted at the corners of the front panel, under the flaps. These
screws secure the chassis (removable part) to the relay case, ensuring good seating/contact.
5.2.2
Replacing the complete relay
To remove the complete relay (active part and case) the entire wiring must be removed from
the rear connector.
Before working at the rear of the relay, isolate all current supplies to the MiCOM relay and
ensure that the relay is no more powered.
DANGER:
NEVER OPEN THE SECONDARY CIRCUIT OF A CURRENT TRANSFORMER SINCE
THE HIGH VOLTAGE PRODUCED MAY BE LETHAL AND COULD DAMAGE TO THE
INSULATION.
Remove all wiring (communication, logic inputs, outputs, auxiliary voltage, current inputs).
Disconnect the relay earth connection from the rear of the relay.
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 upper and lower flaps are
installed.
Withdraw the relay from the panel, rack, etc… carefully because it will be heavy due to the
internal transformers.
Содержание MiCom P120
Страница 1: ...MiCOM P120 P121 P122 P123 Overcurrent Relays Version 11 Technical Guide P12X EN T A96...
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Страница 4: ...P12x EN T A96 Technical Guide Contents Page 2 2 MiCOM P120 P121 P122 P123 BLANK PAGE...
Страница 13: ...Introduction P12x EN IT A96 MiCOM P120 P121 P122 P123 INTRODUCTION...
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Страница 16: ...P12x EN IT A96 Introduction Page 2 8 MiCOM P120 P121 P122 P123 BLANK PAGE...
Страница 22: ...P12x EN IT A96 Introduction Page 8 8 MiCOM P120 P121 P122 P123 BLANK PAGE...
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Страница 26: ...P12x EN IN A96 Handling Installation and Case Dimensions Page 2 10 MiCOM P120 P121 P122 P123 BLANK PAGE...
Страница 35: ...User Guide P12x EN FT A96 MiCOM P120 P121 P122 P123 USER GUIDE...
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Страница 109: ...Menu Content Tables P12x EN HI A96 MiCOM P120 P121 P122 P123 MENU CONTENT TABLES...
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Страница 112: ...P12x EN HI A96 Menu Content Tables Page 2 68 MiCOM P120 P121 P122 P123 BLANK PAGE...
Страница 179: ...Technical Data P12x EN TD A96 MiCOM P120 P121 P122 P123 TECHNICAL DATA AND CHARACTERISTIC CURVES...
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Страница 221: ...Application Guide P12x EN AP A96 MiCOM P120 P121 P122 P123 APPLICATION GUIDE...
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Страница 305: ...Communications P12x EN CT A96 MiCOM P120 P121 P122 P123 MODBUS DATABASE MiCOM P120 P121 P122 P123 VERSION V11 A...
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Страница 367: ...Communications P12x EN CT A96 MiCOM P120 P121 P122 P123 COURIER DATABASE MiCOM P120 P121 P122 P123 VERSION V11 A...
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Страница 514: ...P12x EN CT A96 Communications COURIER DATABASE Page 146 248 MiCOM P120 P121 P122 P123...
Страница 515: ...Communications P12x EN CT A96 MiCOM P120 P121 P122 P123 IEC 60870 5 103 MiCOM P120 P121 P122 P123 VERSION V11 A...
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Страница 518: ...P12x EN CT A96 Communications IIEC 60870 5 103 Page 2 248 MiCOM P120 P121 P122 P123 BLANK PAGE...
Страница 536: ...P12x EN CT A96 Communications IEC 60870 5 103 Page 20 248 MiCOM P120 P121 P122 P123...
Страница 537: ...Communications P12x EN CT A96 MiCOM P120 P121 P122 P123 DNP 3 0 DATABASE MiCOM P120 P121 P122 P123 VERSION V11 A...
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Страница 540: ...P12x EN CT A96 Communications DNP 3 0 Database Page 2 248 MiCOM P120 P121 P122 P123 BLANK PAGE...
Страница 553: ...Commissioning and Maintenance P12x EN CM A96 MiCOM P120 P121 P122 P123 COMMISSIONING AND MAINTENANCE GUIDE...
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Страница 573: ...Connection Diagrams P12x EN CO A96 MiCOM P120 P121 P122 P123 CONNECTION DIAGRAMS...
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Страница 579: ...Commissioning Test Record Sheets P12x EN RS A96 MiCOM P120 P121 P122 P123 COMMISSIONING TEST RECORD SHEETS...
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Страница 640: ...P12x EN RS A96 Commissioning Test Record Sheets Page 60 60 MiCOM P120 P121 P122 P123 BLANK PAGE...
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Страница 644: ...P12x EN VC A96 Hardware Software Version History and Compatibility Page 2 26 MiCOM P120 P121 P122 P123 BLANK PAGE...
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