Circuit Breaker testing
Circuit Breaker testing
(OP)
Hi,
I had posted a similar post in the past as well. Unfortunately, I have not been able to find proper litrature issue on this subject. I am sure, some of you have come across this and will be able to advise me some useful input.
1. Partial discharge or Corona test= Is this traditionally a type( Design) test or a production test. Is it mandatory to do this test.
2. Doble GST & UST testing- is this a design test or a production test. Is this mandatory in either of the categories.
Thanks






RE: Circuit Breaker testing
RE: Circuit Breaker testing
RE: Circuit Breaker testing
My observation of North American practices in my new home as a customer is that it would be very unusual to carry out PD testing at the factory.
RE: Circuit Breaker testing
The GST and UST testing is the power factor testing. i do not find value in the power factor testing with gas circuit breakers. it was a test designed for the insulation for OCB's. the test is not required in type testing or production of SF6 CB's.
i am interested to know other points regarding this testing.
RE: Circuit Breaker testing
partial discharge measurements-> o,5 pc
but IEC could accept some peaks until 10 PC.
RE: Circuit Breaker testing
Even if one was able to perform the measurement, the source test voltage must be PD free, which is another difficulty.
PD is an excellent tool, and many are making advances in its use in the field, but to date, it is not a commercially viable test, (as seen in Canada to date)
Use of Insulation PF (Doble) is used by many, and not used by many more. I know of 2 major Canadian utilities who have stopped using this test on breakers (other than older style)because of the lack of conclusive results over the years. The small capacitance of the breaker sections makes it difficult (exception are the gradient capacitors)to get meaningful results.