The presence of violations in a past inspection does not necessarily mean the establishment has the same violations today.

There are several hundreds of spots operating simultaneously on cathodes of vacuum arcs in high-power vacuum circuit breakers. In this work, the spot distribution along the contact surface is ...

Compared with AC interruption, DC interruption has no natural current zero crossing in the process of current interruption. The objective of this paper is to propose an arc-less DC vacuum breaker ...

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