discount Electrical Components ZN63A(VS1)-12 CIRCUIT BREAKER 1.1 Suitable for three-phase AC, 50Hz, rated voltage of 12kV power system; 1.2 Can be used as a protection and control unit for industrial and mining enterprises and substation equipment; 1.3 Can be used for KYN28-12 and other central switch cabinets and fixed switch cabinets; 1.4 The main circuit of the circuit breaker can be used in two ways: insulated cylinder and solid sealed pole. 1.5 Executive standards: GB1984 "High Voltage AC Circuit Breaker" JB/T3855 "High Voltage AC Vacuum Circuit Breaker" DL/T403 "Technical conditions for ordering 12kV-40.5 kV high voltage vacuum circuit breakers" IEC62271-100 "High-voltage switchgear and control equipment-Part 100: AC circuit breakers" 2. Normal use environment 3. Place of use: Indoor 4. Ambient temperature: -15鈩儈40鈩?/p> 5. Altitude: not more than 1000m 6. Daily relative humidity (average): not more than 95% 7. Daily water vapor pressure (average value): not more than 2.2kPa 8. Monthly relative humidity (average): not more than 90% 9. Monthly water vapor pressure (average value): not more than 1.8kPa NO.Nameunit DATA 1Rated voltageKV12 21 min power frequency withstand voltage (effective value) (interphase, ground, fracture)KV42 Lightning impulse withstand voltage (peak value) (interphase, ground, fracture)75 3Rated currentA630銆?250銆?600 4Rated short-circuit breaking currentKA20 25 31.5 5Rated short circuit and current (peak value)KA50 63 80 6Rated dynamic stable current (peak value)KA50 63 80 7Rated thermal stability currentKA20 25 31.5 8Rated thermal stability timeS4 9Rated short-circuit current breaking timestimes30 10Mechanical lifetimes30000 11Rated operating sequence O-0.3S-CO-180S-CO 12Single capacitor breaking capacityA630 13Back-to-back capacitor bank breaking capacityA400 14Contact openingmm11卤1 15Contact strokemm3.5 卤0.5 16Three-phase opening synchronizationms<=2 17Bounce time of closing contactms<=2 18Buffer strokemm10 19Center distancemm210 250 275 20Average opening speedm/s0.9-1.2 21Average closing speedm/s0.5-0.8 22Conductive loop resistanceu 0<=50 630A <=45 1250A <=35 1600A 23Accumulative allowable wear thickness of dynamic and static contactsmm<=3 Vacuum circuit breaker VCB is the most reliable current interruption technology for medium voltage switchgear. Compared with other circuit breaker technologies, it requires minimal maintenance. This technology is mainly suitable for medium voltage applications. Higher voltage vacuum technology has been developed, but it is not commercially feasible. Vacuum circuit breakers are used for metal clad switchgear and porcelain shell circuit breakers. SETN Electric is a manufacturer of Vacuum Circuit Breaker with well-equipped testing facilities and strong technical force. With a wide range, good quality, reasonable prices and stylish designs, our products are extensively used in Electric and other industries. Our products are widely recognized and trusted by users and can meet continuously changing economic and social needs. As one of the leading vacuum circuit breaker manufacturers and suppliers in China, We welcome new and old customers from all walks of life to contact us for future business relationships and mutual success!discount Electrical Components website:http://www.setnelectrics.com/electrical-components/