In order to limit currents, a two phase voltage is applied to an induction machine in rotating state after a brief power outage before full voltages are gradually provided via thyristor switch.

• 对于旋转状态的感应电机，在短暂断电后重新接入电源时，为了限流，经过晶闸管开关首先接通两相电源施加部分电压，然后逐步过渡到全压。