... AC 50/60Hz12kV electric systems,which can be widely used for industrial and civilian cable ring-main networks and power-supply ... SFG and FLN,SF6 breakers, SF6 contactors,and isolating switches for the switch gear are at choice of customers. The ... the spotor electricity-drivenremote. Accessories such as relays, coils, mutual inductors for meters can be installed as required.Current-limiting fuses with ...