Lever arm for a shunt trip device

摘要

A shunt trip device for a circuit breaker having a trip bar for tripping the circuit breaker. The device includes a housing having a slot and a bottom wall having a pivot pocket. The device also includes a lever arm having a lever projection portion and a pivot portion. The pivot portion is located in the pivot pocket to enable rotation of the lever arm in the slot about a lever rotation axis between first and second positions. When the lever arm is in the second position, the lever projection portion moves the trip bar and trips the circuit breaker. The device further includes an actuation device that moves the lever arm to the second position. The pivot portion and pivot pocket form a configuration that increases a perpendicular distance between a force generated by the actuation device and the lever rotation axis.

主权项

1. A shunt trip device for a circuit breaker having a trip bar for tripping the circuit breaker, comprising:
a housing having a bottom wall and a front wall; a pivot pocket formed in the bottom wall; a lever arm having a lever projection portion and a pivot portion, wherein the pivot portion is located in the pivot pocket to enable rotation of the lever arm about a lever rotation axis between first and second positions wherein when the lever arm is in the second position the lever projection portion moves the trip bar and trips the circuit breaker; an actuation device for moving the lever arm to the second position; and front and rear retention walls for stopping rotation of the lever arm in the second and first positions, respectively, wherein the rear retention wall is located between a solenoid and the lever arm.