FIELD: electricity.
SUBSTANCE: according to the way they measure time intervals between successive responses of a threshold element connected to the rectified voltage busbars of a converter and responding to switching overvoltage that occur during switching of the converter gates, and in case the measured time interval overruns the specified range, a failure symptom is generated.
EFFECT: providing signalling and shutdown of the converter in the event of a violation of its operation.
4 cl
