초록 ▼

Alternating current carried in a high voltage conductor is sensed by a toroidal coil to produce a first low level signal representative of the alternating current signal. Transmitter means operating at or near the potential of the conductor and remote from electrical ground receives the low level si

Alternating current carried in a high voltage conductor is sensed by a toroidal coil to produce a first low level signal representative of the alternating current signal. Transmitter means operating at or near the potential of the conductor and remote from electrical ground receives the low level signal and in response produces a series of modulated pulses containing amplitude and phase angle replica information representative of the high voltage alternating current signal. Advantageously, the transmitter may be powered by a power supply deriving power from the high voltage conductor. The pulses produced by the transmitter may be transmitted to a receiver operating at or near ground potential, which receiver then converts the pulses into a second low level signal representative of the high voltage alternating current signal in both amplitude and phase angle.

대표청구항 ▼

Current sensing apparatus for sensing and producing an amplitude and phase angle replica of a high voltage alternating current signal carried in a high voltage conductor, said apparatus comprising: (a) a toroidal coil encircling said high voltage conductor for producing a low level electrical signal

Current sensing apparatus for sensing and producing an amplitude and phase angle replica of a high voltage alternating current signal carried in a high voltage conductor, said apparatus comprising: (a) a toroidal coil encircling said high voltage conductor for producing a low level electrical signal representative of the time derivative of said high voltage alternating current signal; and, (b) transmitter means electrically connected to said coil and presenting a high input resistance thereto, said transmitter means being operative at or near the electrical potential of said conductor and remote from electrical ground for receiving said low level electrical signal and for producing in response thereto a series of modulated pulses of electromagnetic energy containing amplitude and phase angle replica information representative of said high voltage alternating current signal.