Trip interlock design

Details Trip interlock design Trip interlock design

H - Electricity

01

H

306/279

H01H 9/22 (2006.01) H01H 71/12 (2006.01)

Patent

CA 2021699

TRIP INTERLOCK DESIGN Abstract of the Disclosure A trip interlock assembly trips a circuit breaker any time the circuit breaker is removed from its panel mounting. The trip assembly is adapted to be disposed about a load side terminal and cooperate with the circuit breaker tripping means. In one em- bodiment, the trip assembly includes a housing and a spring-loaded actuation arm, disposed generally per- pendicular to the circuit panel surface. The actua- tion arm is formed with a cam surface which cooper- ates with a trip pin adapted to actuate said circuit breaker tripping means. The trip pin acts as a cam follower and rides along the cam surface formed in the actuation arm. When the actuation arm is in an inward position the trip pin is in a normal position. However, when the circuit breaker is removed from the panel, the actuation arm under the influence of a biasing spring moves outwardly. This causes the cam surface on the actuation arm to actuate the trip pin to trip the circuit breaker. In an alternative em- bodiment of the invention, the trip interlock assem- bly includes a bell crank with a reciprocally mounted plunger which actuates an armature in the tripping means directly, instead of by way of the trip pin, anytime the circuit breaker is removed from its panel housing.

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