High breaking capacity, and similar products in the industry, breaking the highest capacity. With isolated, short circuit protection, overload protection, manual control of the four main functions. With isolation, short circuit protection, overload protection, phase loss protection and control functions. With undervoltage release, shunt trip, fault display, test and other auxiliary functions. Range of applications the motor direct start, the direct control. Short circuit and thermal overload protection. Need to implement a class of second-class applications with the.