Compact molded case circuit breaker with increased ampere rating

Details Compact molded case circuit breaker with increased ampere rating Compact molded case circuit breaker with increased ampere rating

1990-10-29

1991-09-17

Picard, Leo P.

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

With housing or support means

200329, H01H 902

Patent

active

050498460

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.

REFERENCES:
patent: 3617676 (1971-11-01), Dennison
patent: 4115669 (1978-09-01), Cali
patent: 4151385 (1979-04-01), Neuser et al.
patent: 4567337 (1986-01-01), Woods, I et al.
patent: 4794356 (1988-12-01), Yu et al.
patent: 4804807 (1989-02-01), Knapp et al.

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