Ground conductor monitoring system and method

Details Ground conductor monitoring system and method Ground conductor monitoring system and method

1976-05-21

1978-02-21

Miller, J D

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

361113, 340256, 324 51, H02H 102

Patent

active

040756750

ABSTRACT:
A system and method for monitoring the continuity of a ground conductor in a power transmission system. A plurality of power transmission cables extend between a power source and a load and include a ground conductor extending between the source and the load. The monitoring system includes a transmitter for transmitting a signal within the audio range over the ground conductor. A receiver receives the signal from the transmitter over the ground conductor. The receiver has associated therewith an alarm device and/or a circuit breaker. In response to the absence of the signal at the receiver which would correspond to an interruption in the ground conductor, the circuit breaker is opened to disconnect the power source from the load. Both the receiver and transmitter are coupled to the ground conductor through closed inductive systems comprising toroids.

REFERENCES:
patent: 3387064 (1968-06-01), Joy et al.
patent: 3633199 (1972-01-01), Curry et al.
patent: 3676739 (1972-07-01), Neuhouser
patent: 3697808 (1972-10-01), Lee
patent: 3728582 (1973-04-01), Agnew
patent: 3729653 (1973-04-01), Mankoff et al.
patent: 3761832 (1973-09-01), Blattenberger
patent: 3895264 (1975-07-01), Kirilloff

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