Method of fabricating a molded case circuit breaker
AssigneeGeneral Electric Company
InventorsRonald D. Ciarcia, Gregory T. DiVincenzo, Richard E. Bernier, Joseph G. Nagy
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Abstract
An interchangeable operating mechanism assembly for molded case circuit breakers having a detachable movable contact arm and trip unit assembly allows the same mechanism assembly to be employed across a wide range of breaker ratings. A snap-on common trip bar attachment further allows multiple-pole facility off the common interrupter mechanism assembly. The mechanism assembly is designed to maintain the operating handle in the "on" position upon the occurrence of a welded contact and prevents the mechanism from being reset.
Claims1
A method of fabricating a molded case circuit breaker comprising the steps of:
- arranging a fixed contact and a line terminal strap within a molded plastic case;
- arranging a trip mechanism electrically connected to a moving contact arm and a load terminal strap within said molded case opposite said fixed contact;
- placing a contact carrier arrangement within slots formed within said molded plastic case and slidingly engaging a pin on said movable contact arm with a pair of slots on said contact carrier;
- arranging a bottom link on said contact carrier by capturing said movable contact arm pin within a pair of slots formed on a bottom of said bottom link;
- mounting a U-shaped operating handle yoke on a pair of side frames carrrying a latch assembly, a cradle and an upper link;
- attaching said upper link to said lower link by engaging a pair of slots formed on said lower link with said movable contact arm pin;
- and
- inserting said side frames within said molded plastic case and fastening said side frames to said molded plastic case.
Dependencies are inferred from the claim text.