Patent ID: 8735758

Claim:
A circuit breaker for an electrical circuit, comprising: a line terminal having a line terminal contact; an interior terminal having an interior terminal contact; a contact arm having first and second arm contacts, wherein said first arm contact and said line terminal contact form a first contact pair and said second arm contact and said interior terminal contact form a second contact pair and said first contact pair, said contact arm and said second contact pair are connected in a series arrangement; an operating mechanism for separating said first and second pairs of contacts wherein first and second air gaps are formed, respectively, when said first and second pairs of contacts are separated and wherein first and second arcs are generated in said first and second air gaps, respectively; a trip unit for actuating said operating mechanism to separate said first and second pairs of contacts when a fault is detected in said electrical circuit; a load terminal coupled to the trip unit; and first and second arc chambers associated with said first and second contact pairs, respectively, wherein said first and second contact pairs are located within said first and second arc chambers, respectively, for quenching said first and second arcs generated in said first and second air gaps, respectively, when said first and second contact pairs are separated.