'No-(Arcing)Fault' Insurance

摘要

An arcing fault originating in a metal-enclosed bus-bar system usually involves ground. This fault can be expected to escalate quickly into a phase-to-phase or three-phase fault-unless the current is detected and interrupted quickly. Arcing faults in medium-voltage metal-clad switchgear occur when a phase-to-phase or phase-to-ground fault takes the form of a flashover through air. Phase-to-phase or phase-to-ground faults are the most prevalent type on electrical systems (three-phase faults are rare occurrences).