... temperature measurement of dynamic contactField of ApplicationV-Sa indoor vacuum circuit breakers are widely used in power ... 5Rated short-circuit breaking currentkA20,25,31.5,40,5020,25,31.56Rated short time withstand currentkA20 ... ,25,31.5,40,5020,25,31.57Rated peak withstand current50,63 ... . V-Sa 12/17.5/24/40.5kV Indoor Medium Voltage Vacuum Circuit Breaker(VCB)