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Method, circuit breaker and switching unit for switching off high-voltage DC currents
Method, circuit breaker and switching unit for switching off high-voltage DC currents
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机译:用于切断高压直流电流的方法,断路器和开关单元
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摘要
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.
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