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. VS1-12/630-20 
 VS1-12/630-25 
 VS1-12/1200-20 
 VS1-12/1200-25 
 VS1-12/1250-20 
 VS1-12/1250-25 
 VS1-12/1250-31.5 
 VS1--12/1600-31.5 
 VS1-12/1600-31.5 
 VS1-12/2000-31.5 
 VS1-12/2000-40 
 VS1-12/2500-31.5 
 VS1-12/3150-40 
 VS1-12 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. 

 VS1-12/630-20 
 VS1-12/630-25 
 VS1-12/1200-20 
 VS1-12/1200-25 
 VS1-12/1250-20 
 VS1-12/1250-25 
 VS1-12/1250-31.5 
 VS1--12/1600-31.5 
 VS1-12/1600-31.5 
 VS1-12/2000-31.5 
 VS1-12/2000-40 
 VS1-12/2500-31.5 
 VS1-12/3150-40 
 VS1-12 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, the role of the composition unit Handcart 

 VS1-12/630-20 
 VS1-12/630-25 
 VS1-12/1200-20