Circuit breaker
US4764836A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 1987 |
| Grant date | Aug 16, 1988 |
| Priority date | — |
| Expiry date | Jan 6, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H9/541
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The circuit breaker displays a commutation device (4) and a semiconductor valve arrangement (6) which is connected in parallel with the commutation device (4), an isolating switching point (5) connected in series with the semiconductor valve arrangement (6) and a control circuit (11). The control circuit detects the polarity of the current to be disconnected and, together with a switching-off command (24), emits a response command to the commutation device (4) when the detected current flows in the direction of conduction of the semiconductor valve arrangement (6). When the current to be disconnected is interrupted in the semiconductor valve arrangement (6) after the commutation device (4) has responded, the control circuit (11) emits a release command to the isolating switching point (5) forming an isolating gap. As a result, the semiconductor valve arrangement (6) is isolated and the switching-off process is terminated. This circuit breaker is intended to be controlled by simple means, in spite of a comparatively low number of semiconductor valves (diode 10). This is achieved by the fact that the semiconductor valve arrangement (6) contains at the most one semiconductor valve (di…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.