Research on parallel mean flow technology of high-voltage vacuum circuit breaker

The impact generator is equivalent to a generator operating in an accident condition, carrying an extremely high short circuit current, and must be protected with an exit protection circuit breaker that can open the large current.At the present stage, the exit protection circuit breaker has insufficient disconnection capacity to effectively average the flow.In this regard, this paper first puts forward a large capacity parallel vacuum circuit breaker with 160kA short circuit current, then analyzes its basic working principle, and finally calculates its parallel mean flow characteristics, which verifies that the parallel operation of large capacity vacuum circuit breaker and has the ability to open off large capacity short circuit current.