2 Pole DC 800V Circuit Breaker for Solar ( PV ) System 1,L7,C45N, ... Pole DC 800V Circuit Breaker ( DC MCB breaker ) for Solar ( PV ) System ker(hereafter ref The KL7- ... and below, direct-current rated voltage 600V. Uses for carries on the overload, short circuit protection to the ... , the operation security feel is strong, comfortable feel: When wiring certainly must pay attention to +, - the polarity; ; ...