Why it is necessary to do the AC hipot testing for the circuit breaker?
The power frequency withstands voltage test(AC hipot test) is an important method for evaluating the insulation performance of breakers, switchgear, and other breakers. The AC hipot testing examines whether the circuit breaker can withstand the high voltage without breakdown or damage, through simulating the overvoltage conditions that the equipment may encounter during actual operation. AC hipot testing helps ensure product quality and provides a strong guarantee for the safe operation of the power system for switchgear manufacturers.
What is the standard for the AC hipot testing for circuit breakers?
During conducting the power frequency withstand voltage test, the test voltage for circuit breakers is generally confirmed at 80% to 100% of the test value when ex-factory. The factory value is the performance indicator set by the manufacturer when the product is manufactured, representing the working capability of the circuit breaker under ideal conditions. The factory value enables a more accurate assessment of the performance of the circuit breaker in actual use, conducting the withstand voltage test based on.