... technology to develop, The rated insulating voltage is 950V, Suitable for AC 50Hz(60Hz), rated working voltage 690V or below, rated ... connection plug-in connection; 4, According to operation way: For direct handle operation for external rotary handle operating, formotor operating; 5, According ... . 7, The neutral poles (N poles) of four poles MCCB has for types: 8, Type A: No overload release on N pole ...