Arc extinction chamber unit in a multipolar circuit breaker

Details Arc extinction chamber unit in a multipolar circuit breaker Arc extinction chamber unit in a multipolar circuit breaker

1988-11-14

1990-06-19

Macon, Robert S.

Electricity: circuit makers and breakers

Liquid contact

Time delay

H01H 3308

Patent

active

049355899

ABSTRACT:
There is disclosed an arc extinction chamber unit for assembly into a multipolar circuit breaker. This chamber unit is composed of arc extinction chambers provided one for each pole, and coupling arms for connecting the chambers to each other. The chambers and coupling arms are molded into one unitary body. Each chamber can contain a generated arc gas pressure, preventing the arc gas pressure being vented to the outer box of the circuit breaker, thereby reducing the stress on the outer box. The arc extinction chamber unit includes restraining arms which connect to the walls of the circuit breaker outer box, further strengthening the box. Each arc extinction chamber contains grooves in the inner wall for easy insertion of grids. The grids are configured with V-shaped indentations. The integral construction of the chamber units and coupling arms provides for assembly into the circuit breaker in a single assembly step.

REFERENCES:
patent: 2648742 (1953-08-01), Edmunds
patent: 4596909 (1986-06-01), Kakizoe et al.
patent: 4845460 (1989-07-01), Manthe et al.

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