CIRCUIT BREAKER WITH DIAL INDICATOR FOR MAGNETIC TRIP LEVEL ADJUSTMENT

摘要

This concerns a molded case circuit breaker having separable main contacts and an operating mechanism utilized to cause the separable main contacts to open and close. A trip unit is provided to actuate the operating mechanism in desirable circumstances. The trip unit has a magnetic trip level adjustment dial, which has an adjustment face with a series of detents therein. The dial has a cam service, which interacts with internal portions of the trip unit to set or calibrate the level at which a magnetic trip actuati on occurs. The aforementioned detent interacts with a spring loaded L-shaped member which fits into the casing of the trip unit along with the dial as a single unit.