Summarize:

VS1-12 series indoor installed high voltage vacuum circuit breaker is indoor high voltage switchgear(hereinafter referred to as：indoor vacuum circuit breaker), 

suitable for use in three-phase power system with rated voltage 12KV and frequency 50HZ, as a protection and control appliance.

 Due to the special advantages of vacuum circuit breaker, it is especially suitable for frequent operation of rated current, or many times to break the short circuit current.

Model meaning:  

VS1-12 口/口-口

VS----Vacuum Circuit Breaker

1  ---- Design sequence number

12 ----Rated voltage(KV)

口 ----Operating mechanism code

口 ----Rated current (A)

口 ----Rated short circuit breaking current(KA)

Normal service environment：

Ambient temperature: not higher than 40°C, not lower than -10°C (allowed at -30°C storage and transportation).

Altitude: not more than 1000m.(If it is necessary to increase the altitude, the rated insulation level will be increased accordingly).

Relative humidity: the daily average is not more than 65%, the daily average saturated steam pressure is 2.2X10-3MPa, the monthly average is not more than 1.8X10-3MPa.

Earthquake intensity: not more than 8

Places without fire, explosions, severe pollution, chemical corrosion and violent vibration.

Indoor Vacuum circuit breaker main technical paramters:

Outline overall and installing dimensions