Trifurcated arc runner

Details Trifurcated arc runner Trifurcated arc runner

1979-03-15

1981-10-13

Macon, Robert S.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200144R, 200146R, H01H 3320

Patent

active

042950228

ABSTRACT:
A relatively high current capacity molded case circuit breaker having arcing and main contacts and an arc chute to receive and extinguish arcs drawn between the arcing contacts is provided with a trifurcated magnetic arc runner extending from the stationary arcing contact well into the arc chute. The outer sections or legs of the arc runner extend generally parallel to the forward surface of the terminal strap on which the stationary contacts are mounted, and the center leg of the arc runner is curved forward so that the free end of the center leg extends forward of a substantial number of plates in the arc chute. The center leg is shaped so that during opening of the circuit breaker the movable arcing contact moves in close proximity to the center leg and in so doing encourages arcs which may form between the main contacts to extinguish rapidly.

REFERENCES:
patent: 2467937 (1949-04-01), Jackson
patent: 3114814 (1963-12-01), Stettner
patent: 3441697 (1969-04-01), Wingard
patent: 3784775 (1974-01-01), Gryctko
patent: 4086460 (1978-04-01), Gillette

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