... is not desirable. In this case, motor starts under ideal starting current and speed up evenly. The ... especially suitable for starting under heavy load. Even in the event that power grid voltage is low, it ... , hoister, crusher, compressor, fan and water pump under heavy load.II. Performance and features 1.It is ... and motors are prolonged.5.It can start under low voltage. It can start successfully in 5.5 ...