MOLDER CASE CIRCUIT BREAKER WITH AN IMPROVED ARC GAS¹EXTERNAL VENTING SYSTEM

摘要

The invention relates to a molded-case circuit breaker having improved means for venting gaseous arc products. …??The gas venting means comprise venting slots (412) formed through a wall of the circuit breaker housing, and one-way valves (410) positioned in the slots so as to pass gaseous arc products to be vented from the housing, and to prevent the ingress of contaminants from the ambient.