Apparatus and method for circuit breaker trip unit adjustment

Details Apparatus and method for circuit breaker trip unit adjustment Apparatus and method for circuit breaker trip unit adjustment

2005-10-18

2005-10-18

Donovan, Lincoln (Department: 2832)

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Tripping means

C335S042000

Reexamination Certificate

active

06956452

ABSTRACT:
A trip system for a circuit breaker having a calibration system is disclosed. The calibration system includes a retainer, a tripping member responsive to an electric current, an actuator retained by the retainer, a spring adjuster adjustably engaged with the actuator and the tripping member, and a bias spring disposed for biasing the actuator in a first direction. Movement of the spring adjuster absent movement of the actuator and the tripping member results in a change in the bias spring force and no change in the position of the tripping member, and movement of the tripping member absent movement of the spring adjuster results in a change in the position of the tripping member and no change in the bias spring force.

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