Low voltage circuit breaker with multiple contacts for high curr

Details Low voltage circuit breaker with multiple contacts for high curr Low voltage circuit breaker with multiple contacts for high curr

1991-10-16

1993-05-11

Scott, J. R.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200144R, 200147R, H01H 3312, H01H 3320, H01H 946

Patent

active

052103854

ABSTRACT:
To improve the electrical withstand of a low voltage circuit breaker for high currents having multiple contacts of the same length and a stationary arc guiding horn having an intermediate edge extending over a short distance in the direction of movement of the front extensions of the contact fingers, a stationary arcing contact is arranged between the edge of the arc guiding horn and the stationary main contact. The stationary main contact is designed to cooperate with a movable arcing contact of at least one contact finger. At the beginning of the opening travel, closing of the arcing contacts takes place before the main contacts separate. The stationary arcing contact is located in the immediate vicinity of the edge.

REFERENCES:
patent: 3585329 (1971-06-01), Walker et al.
patent: 4295022 (1981-10-01), Robins
patent: 4737606 (1988-04-01), Winter
patent: 4764650 (1988-08-01), Bur et al.
patent: 4968859 (1990-11-01), Davies et al.
patent: 4996507 (1991-02-01), McKee et al.

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