In 1, an overview of TYR1 series soft starter is a three-phase squirrel-cage type motor starting operation, Chinese display smart new products, it successfully solves the starting of AC motor caused by the large starting current of the voltage quality and power supply line power consumption increase and the influence on mechanical equipment shock problems. TYR1 series Chinese display of soft start controller is based on the advanced microprocessor as the core, control of high power thyristor component, has a current limiting voltage ramp starting, starting, soft stop and other functions,