Breaker Failure
Breaker Failure
(OP)
Hello,
Kindly can any one give some information about what causing 132kv Transformer Breaker to Fail In the 132/33/11kV substation.
Thanks,
Kindly can any one give some information about what causing 132kv Transformer Breaker to Fail In the 132/33/11kV substation.
Thanks,






RE: Breaker Failure
Can you give any information leading upto the failure and what failure as occurred.
desertfox
RE: Breaker Failure
Alan
"The engineer's first problem in any design situation is to discover what the problem really is." Unk.
RE: Breaker Failure
1-Failure of CB to open ( stuck breaker)
CB with failure does not opened mechanically. You can detect this by sinalization of springs loaded or by CB auxiliary contact closed.
2– CB opened mechanically , but was not opening electrically. (arc voltaic was not interrupted.)
CB failure opened but you can verify circulating current due to not interruption of electrical arc , internally, between main contacts of same pole of CB.
RE: Breaker Failure
Loss of SF6 would stop the breaker from opening electrically. It would also explain why the breaker would open but not break the arc.
RE: Breaker Failure
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If we learn from our mistakes I'm getting a great education!
RE: Breaker Failure
RE: Breaker Failure
RE: Breaker Failure
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If we learn from our mistakes I'm getting a great education!
RE: Breaker Failure
Elements rarely get replaced when they are still in good working order. Those old oil breakers made in the 40s and 50s are almost indestructable.
RE: Breaker Failure
RE: Breaker Failure
1)Failure to Trip could occur because the contacts do not open after trip circuit energized, short or open in the trip coil or mechanical problem with breaker.
2) Failure to Clear may occur when contacts open but fault not extinguished. Also, the current continues to flow or a combination of mechanical or dielectric problems.
RE: Breaker Failure
Alan
"The engineer's first problem in any design situation is to discover what the problem really is." Unk.
RE: Breaker Failure
Thanks for the imformation, it's very valuable.
Thanks
RE: Breaker Failure
Why trip all circuits connected to a busbar by BFP? Why not leave BFP to operate when there's actually a fault and the CB fails to open?
Isn't an option to leave the CB blocked in "Close" position until the System Operator does some switching in order to isolate the problematic CB?