Transcript 400KV KAIGA-GUTTUR LINE II

FREQUENT TRIPPING OF 400KV
KAIGA-GUTTUR LINE II
1. 400KV KAIGA-GUTTUR II SYNCHRONISED FOR THE FIRST TIME ON 400KV
LEVEL ON 8TH AUG 05 @ 12:49HRs
2. DURING 8TH – 16TH AUG 05, AROUND 7-8 TRIPPING INCIDENCES OCCURRED
EITHER DUE TO
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INSULATOR FAULT
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PROBLEM WITH 400 KV BREAKER @ GUTTUR END.
3. ON 13TH AUG 05 @ 07:14HRs, LINE TRIPPED FROM GUTTUR END ON MAIN
BREAKER POLE DISCREPANCY.
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LINE SYNCHRONISED WITH TIE-BREAKER ON 16TH AUG 05 @ 12:01HRs
4. AGAIN ON 16TH AUG 05 @ 12:39HRs, LINE OPENED OUT @ GUTTUR DUE TO
TIE-BREAKER PROBLEM
5. KAIGA STATION WITH BOTH UNITS ON BAR CONNECTED TO GUTTUR WITH
ONLY ONE CIRCUIT AT 220KV IS OF CONCERN
6. ALREADY ON TWO INSTANCES ON 17TH & 23RD KAIGA UNITS WENT ON
HOUSE LOAD DUE TO TRIPPING OF GUTTUR LINE.