... to develop, The rated insulating voltage is 950V, Suitable for AC 50Hz(60Hz), rated working voltage 690V or below, ... MCCB 1, Installation type of MCCB: MCCB are suiable for vertical or harizontal installation. 2, According to use of ... plug-in connection; 4, According to operation way: For direct handle operation for external rotary handle operating, formotor operating; 5, According to overload ...