DC-rated circuit breaker with arc suppressor

Details DC-rated circuit breaker with arc suppressor DC-rated circuit breaker with arc suppressor

1993-05-28

1995-10-31

Kincaid, Kristine L.

High-voltage switches with arc preventing or extinguishing devic

Arc preventing or extinguishing devices

Housing structure

218156, H01H 3304

Patent

active

054631998

ABSTRACT:
A circuit breaker having an arc chute adjacent the arc path between a fixed and a movable contact. To aid in extinguishing the arc under short circuit conditions, an arc suppressor element is fixed on a movable surface adjacent the movable contact; and preferably on the arm itself facing the fixed contact and arc chute. The arc suppressor is made from a thermoplastic material such as nylon 6/6 which has high temperature resistance and high dissipation factor, and absorbs a relatively large amount of water. During interruption of a high current arc, heat shock liberates gases and water vapor from the suppressor material to neutralize arc ions and blow the arc toward the chute.

REFERENCES:
patent: 4733032 (1988-03-01), Pardini
patent: 4970481 (1990-11-01), Arnold

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