Generator circuit breaker
Generator circuit breaker
(OP)
Hi,
Can you please give me a concrete example how to set the currents and time delays on an air circuit breaker protecting a generator?
I know that when you have a cable, the "characteristic" is an inverse curve, but what does the "characteristic" of a generator look like?
Thanks.
Can you please give me a concrete example how to set the currents and time delays on an air circuit breaker protecting a generator?
I know that when you have a cable, the "characteristic" is an inverse curve, but what does the "characteristic" of a generator look like?
Thanks.






RE: Generator circuit breaker
RE: Generator circuit breaker
RE: Generator circuit breaker
T'd = 0.51404 s
T'd0 = 7.1960 s
T"d = 0.0118 s
T"d0 = 0.0145
Te = 0.2225
Ta = 0.0608
Instantaneous LLL fault: 23589 A
Instantaneous LL fault: 20718 A
Instantaneous LN fault: 29952 A (I thought LLL would be highest)
Rated current: 3615 A
RE: Generator circuit breaker
RE: Generator circuit breaker
RE: Generator circuit breaker
If you want to come back with specific questions, and lots of supporting material as to how you have approached the problem, I'm sure you can get plenty of discussion. At this point, though, the problem is too wide open to be meaningfully solved here.
RE: Generator circuit breaker
RE: Generator circuit breaker
Alan
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"It's always fun to do the impossible." - Walt Disney
RE: Generator circuit breaker
What Alehman said!!!!.
ONLY, ONLY generator mnf. can give you answer !!!!
It's really hard Q.
It's not only simple O/C 50,51 protection, probably you need also 51V protection.
Try ask generator mnf..
Good Luck.
Slava
RE: Generator circuit breaker
The manufacturer gave me the data in the PDF file attached to the following link:
ht
What should i look at?
Thank you.
RE: Generator circuit breaker
Alan
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"It's always fun to do the impossible." - Walt Disney