Zero-phase-sequence voltage sensing apparatus

Details Zero-phase-sequence voltage sensing apparatus Zero-phase-sequence voltage sensing apparatus

1988-10-24

1989-11-07

Karlsen, Ernest F.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Polyphase

307127, 324 86, 361 76, G01R 1900, H02H 326

Patent

active

048795097

ABSTRACT:
This invention relates to a voltage sensor for sensing a voltage on an electrically charged object such as a distribution line or the like, the sensor being disposed with an insulation space to the object. The voltage sensor includes an amplifier circuit for outputting a signal having a waveform similar to that of a displacement current inflowing from the electrically charged object via the insulation space, and a filter circuit for extracting a signal having predetermined frequencies from the output of the amplifier circuit and outputting an alternating current waveform similar to the potential of the electrically charged object.

REFERENCES:
patent: 1504614 (1924-08-01), Fortescue
patent: 2756414 (1956-07-01), Doremus
patent: 4121154 (1978-10-01), Keating
patent: 4146913 (1979-03-01), Sun
patent: 4479160 (1984-10-01), Stacey

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