VCB
VCB Current Chopping Overvoltage: Mechanisms, Hazards, and Mitigation
1.Physical Mechanism: The "Forced Interruption" of Vacuum Arcs Vacuum Circuit Breakers (VCBs) achieve arc extinction through the extremely rapid dielectric recovery of a high-vacuum medium. When interrupting small inductive currents (such as no-load transformers or motors), the metal vapor plasma ma
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