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) 
 VS1-12 (ZN63A-12)-type indoor high voltage vacuum circuit breakers, three-phase AC 50Hz 12kV power system for the fixed-voltage indoor switchgear, as the network equipment, industrial and mining equipment, power protection and control unit. Applies to the rated operating current of the frequent operation, or multiple short-circuit breaking current location. 
 The circuit breaker operating mechanism and circuit breaker body-in-one design, either as a fixed installation unit can also be equipped with a dedicated agency to promote, Used unit component role. 

 Ring with the environment 

 A ambient air temperature: up to +40 ℃, minimum -15 ℃; 
 b Altitude: ≤ 100m (For higher altitudes, the corresponding increase in the rated insulation level); 
 c Amplitude: Earthquake column is no more than 8 degrees; 
 d daily average relative humidity is less than 95%, on average less than 90% 
 e no fire, explosion, serious pollution, chemical corrosion and severe vibration. Main purpose VS1-12 type indoor high voltage vacuum circuit breakers, three-phase AC 50Hz 12kV power system for the fixed voltage indoor switchgear, as network equipment, industrial and mining equipment, power protection and control unit. Applies to the rated operating current of the frequent operation, or multiple short-circuit breaking current location. 
 The circuit breaker operating mechanism and circuit breaker body-in-one design, either as a fixed installation unit can also be equipped with a dedicated agency to promote, Used unit component role. Ring with the environment 
 A ambient air temperature: up to +40 ℃, minimum -15 ℃; 
 b Altitude: ≤ 100m (For higher altitudes, the corresponding increase in the rated insulation level); 
 c Amplitude: Earthquake column is no more than 8 degrees; 
 d daily average relative humidity is less than 95%, on average less than 90% 
 e no fire, explosion, serious pollution, chemical corrosion and severe vibration. Main technical parameters No. Name Name Data 
 Rated voltage kV 12 1 
 Rated frequency Hz 50 2 
 3 Rated insulation level 1min power frequency withstand voltage kv ground / white 42/48 
 Lightning impulse withstand voltage (peak) on the ground / white 75/85 
 4 Rated short circuit breaking current kA 20 25 31.5 40 
 5 Rated current A 630 630 1250 1600 1250 1600 
 1250 1250 2,000,250,020,002,500 
 6 Rated short time withstand current (rms) kA 20 25 31.5 40 
 7 Rated peak withstand current (peak) 50 63 80 100 
 8 Rated short-circuit current (peak) 50 63 80 100 
 9 Rated short-circuit current duration of the S 4 
 Mechanical life 10 times 20 000 
 11 secondary circuit power frequency withstand voltage (1min) V 2000 
 Rated operating sequence of sub-12-t-co co-sub-sub-t1-