ZN85-40.5G(3AV3) indoor AC HV Vacuum circuit breaker(hereinafter called circuit breaker)is applicable for power system with  three-phase AC50/60Hz,40.5kV, used for industrial and mining enterprises, power plants and transformer substations to protect and control equipemnts, also, it can be used in the location where with frequent operating. Pls mail to : anniechan789 at gmail dot com for more detailed information.