... partner 4.20years experience medium voltage switchgearTechnical requirementMain circuit rated voltage 400V,690VRated frequency 50HzRated insulation voltage 690V(1000V)Rated currenthorizontal bus ... 5s)25001760levels of protection IP30,IP40generatrix3 phase 4 wire systemA,B,C,PE,N3 phase 5 wire systemA,B,C,PE ... &BENDING MACHINESTANDARD CONNECTION & SCHEINER BREAKER,ABB , HONGDA medium voltage switchgear