Compact molded case circuit breaker having anti-turn terminal co

Details Compact molded case circuit breaker having anti-turn terminal co Compact molded case circuit breaker having anti-turn terminal co

1990-11-08

1992-05-26

Picard, Leo P.

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

With housing or support means

439810, 439814, H01H 902

Patent

active

051172119

ABSTRACT:
A compact molded case circuit breaker with increased ampere rating employs a latch assembly for maintaining the circuit breaker operating mechanism in a closed condition against a pair of powerful operating springs. To increase the mechanical advantage required to move the operating handle against the springs, a retractable handle extender is attached to the handle. For higher-rated circuit applications, a lug cover extension is added to the line end of the breaker to assist in extinguishing the intense arc that occurs during circuit interruption and to protect the line lugs from inter-phasal circuit faults. A visual access slot is arranged next to the circuit breaker handle to ascertain and verify the condition of the circuit breaker contacts. The line and load terminal straps are slotted to receive protrusions on the bottom of the line and load terminal lugs and provide anti-turn facility to the line and load terminal lugs under short circuit overcurrent conditions.

REFERENCES:
patent: 3075164 (1963-01-01), Humpage et al.
patent: 3638173 (1972-01-01), Middendorf et al.
patent: 3694701 (1972-09-01), Stanback
patent: 3715707 (1973-02-01), Anderson
patent: 3891298 (1975-06-01), Yorgin et al.
patent: 4527027 (1985-07-01), Link et al.

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