ABB says new HVDC circuit breaker solves 100-year-old puzzle ABB says it has developed the world’s first circuit breaker for high-voltage direct current (HVDC). The breaker reportedly combines very fast mechanics with power electronics and will be capable of interrupting power flows equivalent to the output of a large power station within five milliseconds — 30 times faster than the blink of a human eye. An ABB release said the breakthrough removes a 100-year-old barrier to the development ...

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