... 1,Isolating Control and protective Switch 2,690V 45A Control and Protective Switch 3,Isolating switch 4,IEC,CE Certified 690V ... as short-circuit current. FunctionSPKBO-G control the protection switch modular structure of a single product type, integrating the ... traditional circuit breaker (fuse), contactors, overload (or over-current, phase) relays, starters, ...