ZN73M-12 type indoor high voltage vacuum circuit breaker is applicable for AC 50HZ, rated voltage 12KV three-phase AC power system with the function of breaking and closing load current, overload and short circuit current.

It applies to the different nature of the load switching and frequent operation of the power lines for protection and control of electrical equipment in industrial and mining enterprises, power plants and substations

1 Ambient temperature: max +40°C min -15°C(conveyance under -30°C is allowed),

2 Altitude: ≤1000m

3 Relative humidity: daily average relative humidity: ≤95%; monthly average relative humidity≤90%; daily average saturated vapor pressure ≤2.2*10^-3 MPa; monthly average value  ≤1.8*10^-3 MPa

4 Earthquake intensity: ≤8 degree

5 The installation should be free from fire, explosion, severe vibration, chemical corrosion and serious pollution

Order instruction

Complete model and order quantity of the product

Rated current, rated voltage

Operating voltage

Rated voltage of the operating mechanism of opening and closing tripping device, energy storage motor.

Required accessory and quantity

Other requirement please contact with us directly