Arc chamber for bi-directional DC

摘要

A circuit breaker including a pair of separable contacts and an arc chamber is provided. The separable contacts include a fixed contact having an upper surface. The arc chamber includes magnetic members disposed on either side of the separable contacts. The magnetic members have a lower surface below the fixed contact upper surface.

主权项

1. An arc chamber assembly for a direct current circuit breaker, said circuit breaker including a number of pairs of separable contacts, each pair of separable contacts including a fixed contact having a generally planar upper surface, wherein said fixed contact has a width, said arc chamber comprising:
a housing assembly and a number of conductive members; said housing assembly including a number of support members and a number of magnetic members, each magnetic each member having a generally horizontal lower surface; each magnetic member coupled to a support member; wherein said support members position each said magnetic member lower surface below said fixed contact upper surface; said number of conductive members includes an arc runner assembly; said arc runner assembly includes a number of conductive plates; said arc runner conductive plates disposed adjacent to, and in electrical communication with, said fixed contact; and said arc runner assembly has a width that is greater than the width of said fixed contact.