Ground fault circuit breaker

Details Ground fault circuit breaker Ground fault circuit breaker

1975-12-31

1978-03-28

Miller, J. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

361115, 335 37, H02H 328

Patent

active

040818527

ABSTRACT:
Ground fault circuit breaker structure characterized by an insulating integral housing having a pair of side-by-side compartments that are separated by a partition wall. A circuit breaker is located in one compartment and a ground fault detector is located in the other compartment and isolated from the circuit breaker. The ground fault detector comprises a differential transformer comprising a current monitoring core, a plurality of primary windings on the core, each being one of a line and a neutral conductor of an A.C. electrical distribution system, a secondary winding sensing current unbalance between the primary windings, means responsive to a predetermined sensing signal to open the line conductor; and the line conductor extending between the circuit breaker trip means and through aperture means in the partition wall and through the magnetic core and back through the aperture means to the load terminal. The means responsive to a predetermined sensing signal including a pivotally movable member extending through the aperture means and movable against the trip member to unlatch the trip member.

REFERENCES:
patent: 3254176 (1966-05-01), Gelzheiser
patent: 3636482 (1972-01-01), Edmunds

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