Starting method and method overview the advantages and disadvantages of directly starting the motor direct starting current is about 5 times the normal operation, in theory, as long as the power supply to the motor and transformer capacity is more than 5 times more than the capacity of the motor, can be directly started. There are few equipment, simple starting mode and low cost for large capacity motor. On the one hand, the capacity of the power supply line and transformer is difficult to meet the condition of direct starting of the motor. On the other hand, the powerful starting current impact the power grid and motor, which affects the service life of the motor, so it is unfavorable to the power grid. Large capacity motor and can't start directly. Use self