Patent ID: 6201460
Filing Date: 2001-03-13
Classification: H01H

Abstract:
An undervoltage release device for a molded case circuit breaker having an operating mechanism, a trip bar, a line terminal, a load terminal and a cover, the undervoltage release device comprising:an accessory housing;a solenoid assembly having a coil, a plunger and a solenoid frame mounted in the accessory housing;an upper actuator pivotally mounted on the solenoid frame and aligned with the plunger, with the upper actuator in selective contact with the trip bar;a lower actuator pivotally mounted on the solenoid frame and aligned with the plunger, with the lower actuator in selective contact with the trip bar;a plunger reset lever pivotally mounted on the solenoid frame and being engaged with the plunger and having a reset member;an actuator reset lever pivotally mounted on the solenoid frame and having a plurality of tabs, with at least one tab in contact with the upper actuator, at least one tab in contact with the lower actuator, at least one tab in contact with the operating mechanism and at least one tab in contact with the plunger reset lever; anda pair of terminals mounted on the accessory housing and in electrical contact with the solenoid coil and the line terminal side of the molded case circuit breaker, wherein the magnetic force of the solenoid coil is proportional to line voltage on the circuit breaker.