Circuit breaker with auxiliary tripping unit
US4329669A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 1980 |
| Grant date | May 11, 1982 |
| Priority date | — |
| Expiry date | Jul 11, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2083/208
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A manually operated two-pole excess-current protective circuit breaker includes a bimetal control for a switching latch serving both contact bridges. In case of an excess current, the circuit breaker is tripped by a switching latch actuated by the bimetal by virtue of its heat-caused deformation. The circuit breaker unit is provided with a plug-in auxiliary tripping unit having a solenoid-actuated plunger extending into the circuit breaker housing. The plunger moves codirectionally with the working end of the bimetal and cooperates with the switching latch of the circuit breaker. The plunger may assume an actuating position and a withdrawn position dependent upon whether the solenoid is in an energized or a de-energized state and the auxiliary tripping unit may serve as a zero-voltage tripper or as an excess-current tripper dependent upon its structural design which determines the relationship of the plunger positions to the states of solenoid energization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.