ZN28-12 Indoor AC Vacuum Circuit Breaker (VCB)

ZN28-12 Indoor AC Vacuum Circuit Breaker (VCB) is mainly equipped inside the mantal-enclosed switchgear to protect and control the electrical equipments. It confirms to the standards of IEC 60056.Technical parameterserial numberItemUintData20KV25KV31.5KV40KV1Rated voltage(KV)KV122Rated current(A)A630,1000 12501250,16001250,1600 2000,25001600,2500 31503Rated short-circuit break currentKV202531.5404Rated short-circuit close current(peakvalue)KV5063801005Rated peak value withstand currentKV50638010064SRated little withstand currentKV202531.5407Rated in sulation levelIndustrial frequency withstand voltageKV45(fracture48)Thunder impulse withstand voltage75fracture848Rated operation orderOff-0.3s on and off-180s-on and off9Mechanical life-spantimes1000010Rated short-circuit cruuent break and close timetimes302011Speak and move organization amount equal to the voltage of the floodgate(DC)V110,22022012Speak and move mechanism amount shut the electric current of floodgate(DC)A7112813Speak and move organization amount assign the voltage of the floodgate(DC)V110,22014Speak and move organization amount assign the electric current of floodgate(DC)A3.0,1.515Switching distanc of the contactmm11±116Ultra journey(touches the head spring and compress length)mm4±117three-phass breaking intoshut floodgate sex of the same periodms≤218Touch the head and shut a floodgate of time of bouncingms≤219Average speed of breaking brakem/s1.2±0.320Average speed of closing brakem/s0.6±0.221Time of breaking brakeOperate it under the voltage highests≤0.06Operate it under the voltage the mostlow≤0.0822Time of closing brakes≤0.223Each the resistance of main return circuitμΩ≤40≤2024Allowance abrasion cumulated thickness of the moving and stationary contactmm325Oil buffer buffers the journeymm10