Efficient venting means for a circuit breaker

Details Efficient venting means for a circuit breaker Efficient venting means for a circuit breaker

2006-04-25

2006-04-25

Donovan, Lincoln (Department: 2832)

High-voltage switches with arc preventing or extinguishing devic

Arc preventing or extinguishing devices

Housing structure

C335S201000

Reexamination Certificate

active

07034241

ABSTRACT:
An arrangement for reducing pressure inside a circuit breaker caused by gas produced during an electrical interruption event, including a base, an interrupter assembly, and a trip unit base. A structure having a surface is positioned in the base at an angle relative to a vent opening of the interrupter assembly. The trip unit base includes a complementary structure opposing the structure to form a cavity. The base includes a chamber area adjacent to an opening of a vent chute that leads away from the circuit breaker. During an electrical interruption event, hot explosive gas, carbon, and molten metal debris are directed away from the vent opening of the interrupter assembly along the angled surface of the structure and toward the opening of the vent chute. In this manner, pressure in the circuit breaker is reduced during an electrical interruption event, and undesirable buildup of debris is reduced.

REFERENCES:
patent: 2225791 (1940-12-01), Nau et al.
patent: 5164693 (1992-11-01), Yokoyama et al.
patent: 5608198 (1997-03-01), Clark et al.
patent: 6188036 (2001-02-01), Arnold

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