Apparatus and method for circuit breaker trip unit adjustment
US6956452B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 2003 |
| Grant date | Oct 18, 2005 |
| Priority date | — |
| Expiry date | Sep 24, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H71/7463
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.