Method, circuit breaker and switching unit for switching off high-voltage DC currents
US9450394B2 · kind B2 · utility
0Cited by
9References
30Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 24, 2013 |
| Grant date | Sep 20, 2016 |
| Priority date | — |
| Expiry date | Feb 17, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H3/087
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A high voltage DC circuit breaker includes a semiconductor switching assembly in series with a mechanical switch. When the semiconductor switching assembly is switched off due to a current fault, a residual current flowing through arresters of the semiconductor switching assembly is switched off by the mechanical switch. A capacitor arranged parallel to the mechanical switch leads to passive resonance effects, which in turn induce current zero crossings in its arc. The current zero crossings allow for reliable extinguishing of the arc. The mechanical switch can be an AC circuit breaker.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.