Circuit breaker with improved single coil actuator and undervoltage release mechanism
US4016518A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 25, 1975 |
| Grant date | Apr 5, 1977 |
| Priority date | — |
| Expiry date | Sep 25, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H3/24
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A multipole circuit breaker including a trip release actuator having a single coil coaxially surrounding a plunger and mounted within a hollow cylindrical actuator support frame. The actuator is mounted in association with a latch mechanism and includes a spring biasing the plunger toward release of the latch mechanism. The coil is responsive to an electronic sensing and control circuit and serves, when energized, to oppose the action of the bias spring and maintain the plunger in a position to prevent release of the latch mechanism during normal conditions. Upon either undervoltage or overcurrent conditions the sensing and control circuit deenergizes the coil, allowing the bias spring to move the plunger into engagement with the latch mechanism, effecting release of the latch mechanism and separation of the circuit breaker contacts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.