Controlling start-up of electrically-powered equipment such...

Details Controlling start-up of electrically-powered equipment such... Controlling start-up of electrically-powered equipment such...

H - Electricity

02

P

H02P 1/46 (2006.01) H02H 7/08 (2006.01) H02H 7/085 (2006.01) H02H 7/093 (2006.01) H02P 1/32 (2006.01) H02P 1/48 (2006.01)

Patent

CA 2147949

A method and device to control start-up of three-phase electrically-powered equipment such as a compressor having a drive output rotor shaft to avoid mechanical damage. The device is used to detect and measure rotor shaft speed during start-up to produce an output signal and feeding that output signal to an actuating means arranged to abort start-up in the event of failure of the rotor shaft to attain a specified speed, preferably if it has not been reached within a specified time. Particular application is in star/delta starting of high starting load/torque electrical motors.

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