Molded case circuit breaker with an improved internal venting sy

Details Molded case circuit breaker with an improved internal venting sy Molded case circuit breaker with an improved internal venting sy

1984-09-28

1986-04-08

Marcus, Stephen

Electricity: circuit makers and breakers

Electric switch details

Cases and bases

200144R, H01H 934

Patent

active

045815119

ABSTRACT:
A molded case circuit breaker includes an improved system for internally venting gaseous arc products to control the internal gas pressure increase and expansion during an arc interruption. The system includes a first gas expansion chamber disposed proximate to a stationary electrical contact of a pair of separable electrical contacts of the circuit breaker and a second gas expansion chamber disposed proximate to an electrically insulating arc chute barrier that is positioned at an end of an elongated arc chute remote from said stationary electrical contact. The arc chute barrier and the stationary electrical contact are physically configured to effect the rapid internal venting of gaseous arc products to the first and second chambers.

REFERENCES:
patent: 2863969 (1958-12-01), Edmunds
patent: 3341791 (1967-09-01), Leonard
patent: 3649791 (1972-03-01), Kruckewitt
patent: 4271339 (1981-06-01), Meister et al.

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