Circuit breakers sensitive to leakage currents

Details Circuit breakers sensitive to leakage currents Circuit breakers sensitive to leakage currents

1982-03-18

1984-04-03

Moose, Jr., Harry E.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

361 96, H02H 328

Patent

active

044411340

ABSTRACT:
The invention relates to a circuit breaker for cutting off the two AC supply leads of an electrical receiver from the time of creation of a leakage current F between said receiver and ground through a human body. This circuit breaker comprises a differential transformer generating a faulty voltage V.sub.O, a relay with contacts open when it is not energized, and means (A.sub.1,A.sub.2, . . . A.sub.n ; R.sub.1,R.sub.2 . . . R.sub.n) supplied by the system, adapted to exploit the voltage V.sub.O for the purposes of energizing the relay if the current F is dangerous or at least unpleasant in its intensity and/or its duration, without however being sensitive to disturbances.

REFERENCES:
patent: 3801872 (1974-04-01), Zocholl et al.
patent: 4024435 (1977-05-01), Gross
patent: 4216516 (1980-08-01), Howell
patent: 4347541 (1982-08-01), Chen et al.

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