Circuit breaker with improved arc extinguishing means

摘要

This invention relates to circuit breakers and more particularly to circuit breakers for industrial power circuits with 10,000 amp interrupting capacity and 240 V ratings. This invention provides a novel arc shield arrangement whereby two arc shields are placed in series alignment with a small air gap between the shield. The effect of this new arrangement increases the arc voltage and arc braking distance and yet the air gap is kept small enough to keep the arc within the shielding and away from other components where it can cause damage.