Indoor Vacuum Circuuit Breaker

12kV 24kV Drawout type

630A  1250A  1600A 2000A  2500A  3150A




These vacuum circuit breakers are designed for three phase AC 50Hz power system with rated voltages of 12, used as protection and control unit for grid equipment and power equipment of industry and mining enterprises. They are suitable for areas where frequent operations of rated operating current or multiple switching of short circuit current are required. The operating mechanism is integrated into the circuit breaker body. The circuit breaker can be installed as a fixed unit, or equipped with a truck or a withdrawable part to easily move into the switchgear.

Environmental Conditions

Environmental Conditions

◆ Ambient temperature: up to +40°C, greater than -15°C;
◆ Altitude: lower than 1000 m;
◆ Ambient humidity: Daily average relative humidity: ≤ 95%; Monthly average relative humidity: ≤ 90%; Daily average vapor pressure: ≤2.2×10-3 MPa; Monthly average vapor pressure: ≤1.8×10-3 MPa;
◆ Earthquake intensity: ≤ magnitude 8;
◆ Areas without risks of fire, explosion, pollution, chemical corrosion and severe vibration;


Technical Parameters

Rated voltagekV1224
Rated lightning impulse withstand voltagekV75/85125/145
Power frequency withstand voltage (1 min)kV42/4865/79
Rated short-circuit making currentkA25,31.5,4025,31.5,40
Rated currentA630, 1250 1600, 2000 2500, 3150630, 1250 1600, 2000 2500, 3150
Rated thermal currentkA25,31.5,4025,31.5,40
Rated dynamic current(peak)kA63,80,10063,80,100
Rated short-circuit breaking current(Peak)kA63,80,10063,80,100
Rated operating sequence 0—0.3—CO—180s—CO0—0.3—CO—180s—CO
Mechanical enduranceTimes1000010000