Device for monitoring the phases of a three-phase, converter-controlled motor.

摘要

The subject of the present invention is a device for monitoring the phases of a three-phase motor controlled by an electronic governor. According to the invention, this device comprises: - on each phase, a sensor (5) delivering a signal dependent on the noise of the current of the phase and a threshold comparator (16) receiving this signal - a logic gate (17) delivering an error signal when the output signal from one of the comparators (16) shows a fault - and a control relay (18) actuated by this logic gate. <IMAGE>