Patent ID: 9331611
Filing Date: 2016-05-03
CPC Classification: H02J,H02P

Claim Text:
1. A method for controlling a system configured to supply an electric power to a motor by switching a first switch connected to a medium voltage inverter to a second switch connected to a commercial power source, the method comprising: lighting on a first lamp to notify that a switching operation is ready, by ascertaining that the medium voltage inverter is in a normal operation, and ascertaining that the first switch is turned on and the second switch is turned off; receiving an input of a third switch to notify that a switching to a bypass mode is made and an input of a fourth switch to request to start a switching operation; lighting on a second lamp to notify that a switching operation is under way; synchronizing a current of the medium voltage inverter with that of the motor; turning on the second switch, and turning off the first switch; and lighting on a third lamp to notify that the switching operation is completed.