... main switch applies the ZN23-35 vacuum circuit breaker or LN-35 SF6 circuit breaker, which runs safely, long working life, ... withstand current (4S)KA20, 25, 31.5Specified short circuit drop-out currentKA20, 25, 31.5Rated withstand current ( ... peak)KA50, 63, 80Rated short circuit making currentKA50, 63, 80Rated currentA1250-2500Protection degreeIP2XExternal dimension (W ...