Circuit breakers with clock spring drives and/or multi-lobe drive cams and related actuators and methods

摘要

Spring operated actuator devices for an electrical circuit breaker and/or electrical switching device include at least one clock spring comprising a disc shaped body with gear teeth and a spiral spring, a cam shaft holding the at least one clock spring with an inner end portion of the spiral spring attached to the cam shaft, and a drive cam held by the cam shaft adapted to be in communication with a follower that directs an actuator to open or close a mobile contact to maintain open and closed energy status of the electrical circuit. The at least one clock spring is configured as a closing spring of the spring operated actuator.

主权项

1. An actuator device, comprising:
at least one clock spring comprising a disc shaped body with gear teeth and a spiral spring; a cam shaft holding the at least one clock spring with an inner end portion of the spiral spring attached to the cam shaft; and a drive cam held by the cam shaft adapted to be in communication with a follower that is mechanically linked to a circuit interrupter, wherein the drive cam comprises a perimeter with valleys associated with trip open positions of a circuit breaker and lobes associated with trip closed positions of the circuit breaker thereby providing multiple hold locations for trip open and trip closed positions in a single revolution of the drive cam.