Power line waveform measurement system

Details Power line waveform measurement system Power line waveform measurement system

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G01R 13/04 (2006.01) G01D 1/14 (2006.01) G01R 13/06 (2006.01) G01R 19/04 (2006.01) G01R 19/165 (2006.01) G01R 19/17 (2006.01) G06F 15/56 (1990.01)

Patent

CA 1317637

ABSTRACT OF THE DISCLOSURE An AC waveform monitoring system includes detect- ing circuitry for providing a sensed analog signal. Oscil- lator circuitry is coupled to the detecting circuitry for providing a zero crossing signal. The oscillator circuitry is synchronized with a frequency of the sensed analog sig- nal. Signal processing circuitry is coupled to both the detecting circuitry and the oscillator circuitry for iden- tifying a peak voltage signal and an integral volt-seconds signal of the sensed analog signal responsive to the zero crossing signal. Digital processing circuitry is coupled to the signal processing circuitry and the oscillator cir- cuitry. The digital processing circuitry includes memory for storing a plurality of predetermined signal voltage boundary values and a program utilizing the identified peak voltage signal, the integral volt-seconds signal and the stored predetermined signal values to identify an abnormal voltage event.

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