Compact circuit breaker having high interrupting capacity

Details Compact circuit breaker having high interrupting capacity Compact circuit breaker having high interrupting capacity

1977-11-02

1980-08-12

Macon, Robert S.

Electricity: circuit makers and breakers

Liquid contact

Time delay

200147R, H01H 3308

Patent

active

042174724

ABSTRACT:
A compact molded case circuit breaker having a high interrupting capacity is provided with an arc chute constructed of stacked metal plates notched to form a passage for the movable contact as it moves between open and closed circuit position. The stationary contact is at one end of the arc chute and the arc plate at the other end of the arc chute is provided with a tab that extends outside of the arc chute. In its fully open position, the movable contact is positioned so that at least half of it is outside the arc chute, adjacent the free end of the tab on the last contact plate, and slightly spaced therefrom. The movable contact, in the terminal portion of its movement toward full open circuit position, moves generally parallel to the tab of the last arc plate. This construction assures that all of the arc plates will become active almost instantaneously at the time the movable contact reaches the tab.

REFERENCES:
patent: 2575730 (1951-11-01), Sandin et al.
patent: 2861152 (1958-11-01), Scully

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