Circuit breaker main and disconnect contact structure

Details Circuit breaker main and disconnect contact structure Circuit breaker main and disconnect contact structure

1978-01-16

1979-07-03

Aegerter, Richard E.

Electricity: circuit makers and breakers

Electric switch details

Contact

H01H 150, H01H 300

Patent

active

041601424

ABSTRACT:
Modular contact elements are provided for a circuit breaker wherein the stationary main contacts and the disconnect contacts may all be constructed of pairs of contact jaws, each of the jaw elements being identical to the others, thereby facilitating manufacturing and assembly procedures. Various different members of sets of contact jaws may be used for each of the stationary and disconnect contacts depending on the rating and capacity of the circuit breaker. In high capacity circuit breakers the internal upper bus or current carrying bar which carries the stationary contacts and lower bar which carries the movable contact or bridging blade may each be provided with separate supports at the rear end for a plurality of parallel sets of disconnect contact jaws to cooperate with a corresponding plurality of disconnect contacts; the front end of the upper bar may be provided with separate supports for a plurality of parallel sets of stationary contacts to cooperate with a corresponding plurality of movable contact or bridging blades connected to supports at the front end of the lower bar. The front of the upper bar above the stationary contact structure and an upward extension of the movable contact or bridging blade carry complementary arcing contacts. The blade is electrically integrated rotatably with front of the lower bar by spring washers at the pivot area.

REFERENCES:
patent: 2345034 (1944-03-01), Crabbs
patent: 2751471 (1956-06-01), Wills
patent: 3427419 (1969-02-01), Findley, Jr.

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