Electrical fault detecting device

Communications: electrical – Continuously variable indicating – With meter reading

Patent

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Details

342110, 342157, 342127, G08B 2300

Patent

active

056213972

ABSTRACT:
An apparatus for detecting illegal tampering with an electricity meter which is adapted to record the amount of electricity supplied to the meter through cables has a first signal generating sensing coil situated externally of, and upstream of, the meter which generates a first signal representative of the current flowing through one of the supply cables and a second signal generating second sensing coil, located within the meter, which generates a second signal representative of the amount of electricity to be recorded by the meter. A Monitoring device monitors the first and second signals and produces a third actuation signal when one of the first and second signals differs from its correct value as a result of tampering.

REFERENCES:
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patent: 4240030 (1980-12-01), Bateman
patent: 4331915 (1982-05-01), Fieiden
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patent: 4420721 (1983-12-01), Dorey
patent: 4583043 (1986-04-01), Phillps
patent: 4727315 (1988-02-01), Jones
patent: 4873310 (1989-06-01), Friedl
patent: 4901007 (1990-02-01), Sworm
patent: 5113130 (1992-05-01), Balch
patent: 5148101 (1992-09-01), Balch et al.

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