DENGGAO ELECTRIC CO., LTD.  

Product Name: Zw20 Three Phase High Voltage Vacuum Circuit Breaker Model NO.: ZW20-12 Function: Conventional Circuit Breaker, Overcurrent Protection Type: Circuit Breaker Installation: Fixed Arc-extinguishing Medium: Vacuum Operation: Manual Type Breaking Capacity: High Voltage Circuit Breakers Trademark: DGG Transport Package: Export Box Origin: China HS Code: 8504311000 Product Description General:ZW20-12 series outdoor AC vacuum circuit breaker is 12kV distribution equipment of 3 phase,50Hz. It is used to connection and break load current, over-load current and short-circuit current. It is applicable in occasions with frequent operation and automatic power distribution network. It adopts vacuum arc-extinguish mode and SF6 gas insulation. The cabinet employs gas seal, explosion proof and insulation structure technologies. It has excellent integral seal performance. The spring operating mechanism adopt mini design. Action reliability is higher than the traditional spring operating mechanism. It accords with the standards of IEC62271-100.Technical specificationNo.ItemUnitData1Rated frequencyHz502Rated voltagekV123Rated currentA63012504Rated short-time power frequency withstand voltageInterphase, to earth(wet)kV/min34/1Interphase, to earth(dry)42/1Break(dry)48/1Secondary circuit to earth2/15Rated lightning impulse withstand voltageInterphase, to earthkV75Break856Rated short-circuit breaking current(virtual value)kA20257Rated short-circuit making current(peak)50638Rated short-time withstand current and durationkA/s20/425/49Rated peak withstand currentkA506310Rated short-circuit breaking current breaking timesTimes30(E2)11SF6 gas rated gage pressureMPa012Main circuit resistanceμΩ≤12013Rated operating voltage and rated voltage of auxiliary circuitVAC/DC220,DC48,DC2414Machanical lifeTimes10000(M2)Note: If altitude over than 1000m, the rated insulation level should be modify as appropriate.