Electrical switching apparatus, and arc hood assembly and chimney therefor

摘要

A chimney is provided for a circuit breaker arc hood assembly. The circuit breaker housing includes a number of arc chute vents (20) structured to exhaust arc gases. The arc hood assembly includes a body having a first side facing the housing, and a second side opposite the first side. The first side includes a number of apertures. The chimney includes a base disposed at or about a corresponding one of the arc chute vents, a duct (204) extending outwardly from the base and through a corresponding one of the apertures, and a plurality of resilient protrusions (206,208) movably coupling the chimney to the first side of the body at or about the corresponding one of the apertures. The resilient protrusions bias the base toward engagement with the housing to resist the arc gases being undesirably discharged between the base and the housing.