Earth leakage breaker

Details Earth leakage breaker Earth leakage breaker

1996-10-16

1998-05-26

Gellner, Michael L.

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Automatic circuit-interrupting devices

335169, 335172, H01H 7512

Patent

active

057572542

ABSTRACT:
An earth leakage breaker has a case, a handle protruding from the case, a cradle for determining stable positions of the handle, and a movable finger including a movable contact at a bottom portion of the movable finger. The movable finger is pivotally jointed to the handle at a protrusion provided on a lower side of the handle. An extension spring spans between the cradle and the movable finger, and a top-end swinging trigger plate is provided for engaging the cradle. The trigger plate has a fulcrum at a bottom portion thereof, and a test button and a leak trip solenoid are adjacently arranged at a top portion of the case, with the leak trip solenoid having a trip piece engaged with a contact portion formed on a top portion of the trigger plate for effecting circuit breaking due to a leak.

REFERENCES:
patent: 2895028 (1959-07-01), Ellenberger
patent: 3938065 (1976-02-01), Ellenberger
patent: 4529951 (1985-07-01), Youichi et al.

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