High Voltage Indoor Vacuum Circuit Breaker

and modular handcart structures. The factory covers 1,500 square meters and has an on-site research team. Global brand customers have also purchased from us. The High Voltage Indoor Vacuum Circuit Breaker uses a modular design for three-phase AC 50Hz, 12kV indoor switchgear. It is used for control and protection in industrial plants, power plants, substations, and other electrical facilities, including sites with frequent operation.

The operating mechanism and breaker body use an integrated design. The breaker can be installed as a fixed unit or fitted with a dedicated propulsion mechanism for handcart applications. The main circuit can be equipped with solid-sealed poles, helping reduce overall size while improving reliability and reducing maintenance needs. The unit is compatible with KYN28A-12 (GZS) center-mounted handcart cabinets, while the fixed version can be used with XGN series fixed cabinets. Production can follow customer drawings, and a single sample is enough to start the development process.

The High Voltage Indoor Vacuum Circuit Breaker is suitable for defined operating conditions. Ambient temperature should remain between -30°C and 40°C. Installation altitude should not exceed 2,000 meters. At higher altitudes, the rated insulation level should be adjusted accordingly. Daily average relative humidity should not exceed 95%, while the daily average saturated vapor pressure should not exceed 2.2×10⁻³ MPa. The monthly average should not exceed 1.8×10⁻³ MPa.

The installation site should be free from fire hazards, explosion risks, heavy pollution, chemical corrosion, and strong vibration. The rated short-time power-frequency withstand voltage is 42kV for 1 minute, and the rated lightning impulse withstand voltage is 75kV peak. Rated short-circuit duration is 4s, while the secondary circuit has a power-frequency withstand voltage of 2,000V for 1 minute.

For capacitor bank switching, the specified making and breaking conditions also apply. Opening time is 20–50ms, and closing time is 35–70ms. Mechanical life reaches 20,000 operations, with 20,000 rated current operations and 50 rated short-circuit current operations. The moving and fixed contacts allow a total wear of 3mm. Energy storage time is no more than 15s. Contact gap is 11±1mm, with an overtravel of 3±0.5mm.

Interchangeability is important when replacing a handcart. The handcart chassis and secondary plug must both match the cabinet system. Before installation, confirm the cabinet model, handcart dimensions, and secondary wiring method. These checks help ensure a smooth replacement process.

OEM and ODM services are available. Production can be based on customer samples, and outside inspectors are welcome for inspection. Each unit undergoes a complete inspection before packing. The product is covered by a one-year warranty.

Hot Tags: high voltage indoor vacuum circuit breaker, China high voltage indoor vacuum circuit breaker manufacturers, suppliers, factory