Product Overview

   The ZN63(VS1)-12 series indoor high voltage vacuum circuit breaker is a three-phase AC 50Hz, rated voltage of 12kV indoor switchgear. It can be used for the control and protection of industrial and mining enterprises, power plants, substations, and electrical facilities, and is suitable for frequently operated places. The operating mechanism is integrated with the circuit breaker body, and the design can be used as a fixed installation unit, or it can be equipped with a dedicated propulsion mechanism to form a handcart unit. The main circuit part can use the integral solid-sealed pole to realize the miniaturization, high reliability and maintenance-free of the circuit breaker. It can be equipped with KYN28A-12 (GZS) and other middle- mounted handcart switch cabinets. The fixed type can also be equipped with XGN Series of fixed switch cabinets.

Working Environment

1.Ambient temperature: not higher than 40℃ , not lower than -10℃ (storage and transportation allowed at -30℃ ).
2.Ambient temperature: not higher than 40℃ , not lower than -10℃ (storage and transportation allowed at -30℃ ).
3.Altitude: not more than 1000m. (If the altitude needs to be increased, the rated insulation level shall be increased accordingly)
4.Relative humidity: the daily average value is not more than 95%, and the daily average value of saturated vapor pressure is not more than 2.2×10-3MPa,the monthly average is not more than 1.8×10 -3MPa.
5.Earthquake intensity: no more than 8 magnitude.There is no fire, explosion, serious pollution, chemical corrosion and severe vibration.

Main Technical Parameters

   Rated current A630 1250630 1250 1600 2000 2500 31501250 1600 2000 25003150 40004Rated short-circuit breaking current (Rated thermal stability current – effective)kA20/2531.5405Rated short-circuit closing current (peak)kA50/63801006Rated Peak Tolerance Current (Rated Steady Current – Peak)kA50/63801007 rated short circuit withstand currentkA20/2531.54o.Rated insulation level Working withstand voltage ( rated before and after break)/1 min power frequency withstand voltage kV.To earth 42 (  Fracture48)Impulse withstand voltage ( rated before and afterbreak)/ peak rated lightning impulse withstand voltageTo earth 75 ( Fracture85)9 Rated thermal stabilization times410 Rated operation sequence open-0.3s-close open-180s-close open11 Mechanical life Times2000012 Rated short circuit breaking current breaking times Times5013Operating mechanism rated closing voltage (DC)VAC 、DC 110，22014Operating mechanism rated switching voltage (DC)VAC 、DC 110，22015 Contact opening distancemm11±116Overstroke (contact spring compression length)mm3.5±0.517Three-phase opening, closing bounce timems≤218 Contact closing bounce timems≤219 Average opening speedm/s0.9~1.2 Average closing speedm/s0.5~0.820Opening timeMaximum operating voltages≤ 0.0521 Minimum operating voltage≤ 0.0822 Closing times0.123Main circuit resistance of each phaseυΩ630 ≤ 501250 ≤ 4524 Accumulated wear thickness of static and static contactsmm3

Appearance And Installation Dimensions