... 4.High quality ,competitive price ZN28-12 Indoor AC Vacuum Circuit Breaker (VCB) is mainly equipped inside ... ,16002000,25001600,250031503Rated short-circuit break currentKV202531.5404Rated short-circuit close current(peak value) ... circuitμΩ≤40≤2024Allowance abrasion cumulated thickness of the moving and stationary contactmm325Oil buffer buffers the journeymm10 ZN28-12 Indoor AC Vacuum Circuit Breaker ...