1. General 
    Widely used in power plant, substation and various monitoring and application environments. 
    Long endurance vacuum interrupter and epoxy casting technology have ensured that no maintenance is required for integrated pole assembly. 
    VS1-12S series with side operating machanism adopts fixed mounting,mainly used for fixed type switchgear, and can be used individually. 
    More suitable for power network supply, box-type transformer and various nonstandard power supply systems. 
    Electric and Mechanical interlock with more safety.

2. Working Condition
    Altitude:1000m and below;
   Environmental temperature is from:-15~40°C;
   Environmental humidity:
   Daily average of relative humidity≤95%
   Daily average saturated vapor pressure≤2.2×10-3Mpa
   Monthly average of relative humidity≤90%
   Monthly average saturated vapor pressure≤1.8×10-3Mp
   No operating in such environment as subject to dust, dirt, smog, corrosive/flammable gas, vapor and salt pollution.
   Earthquake intensity: No more than 8 degree.

3. Technical Data

    Rated voltage: 10kV (highest voltage 12kV) 
    Rated current: 630A, 1250A, 1600A. 
    Rated short circuit breaking current: 20kA, 25kA, 31.5kA. 
    One minute power frequency withstand voltage (kV): 42 (phase ground), 48 (fracture) 
    Lighting impact withstand voltage (kV): 75 (phase ground ), 85 (fracture) 
    4s rated short-time withstand current (effective value): 20kA, 25kA, 31.5kA.
    Rated peak value withstand current (peak value): 50kA, 63kA, 80kA. 
    Rated short circuit making current (peak value): 50kA, 63kA, 80kA. 
    Rated individual capacitor bank breaking current: 630A 
    Rated back-to-back capacitor bank breaking current: 400A