Of VS1-12 indoor high voltage vacuum circuit breaker 

 VS1-12/630-20 (ZN63A-12/630-20), VS1-12/1000-20 (ZN63A-12/1000-20), VS1-12/1250-20 (ZN63A-12/1250-20) 
 VS1-12/630-25 (ZN63A-12/630-25), VS1-12/1000-25 (ZN63A-12/1000-25), VS1-12/1250-25 (ZN63A-12/1250-25) 
 VS1-12/1250-31.5 (ZN63A-12/1250-31.5), VS1-12/1600-31.5 (ZN63A-12/1600-31.5) 
 Of VS1-12 (ZN63A-12) type indoor high voltage vacuum circuit breaker, is three-phase AC 50Hz rated voltage indoor switchgear of 12kV power system, grid equipment, industrial and mining enterprises, power equipment, protection and control unit. For frequent operation in the rated operating current or repeatedly breaking the short circuit current place. 
 The circuit breaker operating mechanism and circuit breaker body-in-one design, either as a fixed installation unit can be equipped with a special advance mechanism, the composition of the role of the withdrawable unit. 

 Ring with environment 

 A ambient air temperature: up to +40 ° C, the lower limit of -15 ° C; 
 b Altitude: ≤ 100m (For higher altitudes, the rated insulation level corresponding increase); 
 c amplitude the: earthquake columns degree no more than 8 degrees; 
 d air relative humidity daily average not more than 95 percent, on average less than 90% 
 e no fire, explosion hazard, serious pollution, chemical corrosion and violent vibration of the place. The main purpose of VS1-12 type indoor high voltage vacuum circuit breakers, three-phase AC 50Hz fixed voltage indoor switchgear of 12kV power system, grid equipment, industrial and mining enterprises, power equipment, protection and control unit. For frequent operation in the rated operating current or repeatedly breaking the short circuit current place. 
 The circuit breaker operating mechanism and circuit breaker body-in-one design, either as a fixed installation unit can be equipped with a special advance mechanism, the composition of the role of the withdrawable unit. Ring with environment 
 A ambient air temperature: up to +40 ° C, the lower limit of -15 ° C; 
 b Altitude: ≤ 100m (For higher altitudes, the rated insulation level corresponding increase); 
 c amplitude the: earthquake columns degree no more than 8 degrees; 
 d air relative humidity daily average not more than 95 percent, on average less than 90% 
 e no fire, explosion hazard, serious pollution, chemical corrosion and violent vibration of the place. The main technical parameters of the serial number name name of the data 
 1 Rated voltage kV 12 
 Rated frequency Hz 50 
 3 Rated insulation level 1min power frequency withstand voltage kv / white 42/48 
 Lightning impulse withstand voltage (peak) on the ground / white 75/85 
 Rated short-circuit breaking current of 4 kA 20 25 31.5 40 
 Rated current A 630 630 1250 1600 1250 1600 
 1250 1250 2000 2500 2000 2500 
 Rated short time withstand current (rms) 6 20 25 31.5 40 kA, 
 7 Rated peak withstand current (peak value) 506,380,100 
 Rated short-circuit current (peak value) 506,380,100 
 9 rated short circuit current duration of S 
 10 mechanical life times 20000 
 11 secondary circuit power frequency withstand voltage (1min) V 2000 
 Rated operation order-t-co-sub-t1-Hop sub-