Earth leakage circuit breaker with plug actuated resetting break

Details Earth leakage circuit breaker with plug actuated resetting break Earth leakage circuit breaker with plug actuated resetting break

1987-08-31

1989-04-25

Pellinen, A. D.

Electricity: electrical systems and devices

Safety and protection of systems and devices

With specific current responsive fault sensor

361 45, 335 18, 335 27, H02H 308

Patent

active

048253294

ABSTRACT:
An earth leakage circuit breaker has a socket for connecting an appliance to be protected. A plug inserted in the socket depresses a plunger (34), tilting a cam (38) which acts through a striker (42) to momentarily close a relay, thus resetting the circuit breaker. When the appliance is unplugged the cam returns to its normal position, by-passing the striker (42) but closing a pair of test contacts. The reset and test functions are thus carried out without the need for separate buttons, and at times the load is disconnected, so that the circuit breaker contacts do not break load current when they open or close during resetting or testing.

REFERENCES:
patent: 1740911 (1929-12-01), Todd, Jr.
patent: 2157787 (1939-05-01), Farrell
patent: 4409574 (1983-10-01), Misencik et al.
patent: 4521824 (1985-06-01), Morris et al.
patent: 4568997 (1986-02-01), Bienwald et al.
patent: 4595894 (1986-06-01), Doyle et al.
patent: 4630015 (1986-12-01), Gernhardt et al.

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