FIELD: electricity.
SUBSTANCE: method for improvement of detection reliability of generator ground fault at rotating electrical machine comprises delivery of a test signal at the preset frequency to the winding, measurement of the electric parameter response to the signal in the winding, which is a result of the delivered test signal and detection of the ground fault on the basis of the measured electric parameter value. At that frequency of the response signal is defined continuously and the measured value corresponding to a certain frequency is cleared out when this frequency deviates from the preset frequency at the first threshold value.
EFFECT: higher reliability of detection.
10 cl, 3 dwg
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