Overview:

The ZW7-40.5 outdoor high-voltage vacuum circuit breaker is designed for three-phase power systems with an AC frequency of 50Hz and a rated voltage of 40.5kV. It is primarily used for breaking and closing load currents, overload currents, and short-circuit currents.

Environmental Conditions:

• Air temperature: upper limit +40°C, lower limit -30°C;
• Altitude: ≤2000 meters (if a higher altitude is required, the rated insulation level should be correspondingly increased);
• Wind pressure: not exceeding 700Pa (equivalent to a wind speed of 34m/s);
• Seismic intensity: 8 degrees;
• Pollution level: Grade III;
• Maximum daily temperature variation: not exceeding 25°C.

Main Features:

• Utilizes vacuum for arc extinguishing, offering strong breaking capacity, long electrical lifespan, and a mechanical lifespan of 10,000 operations;
• Simple structure, maintenance-free, with a long interval between overhauls;
• Excellent insulation performance with strong pollution resistance;
• Can be equipped with either spring or electromagnetic operating mechanisms, offering reliable mechanical performance and suitability for frequent operations;
• No risk of fire or explosion;
• Built-in current transformer with a calculation accuracy of 0.2, enabling three-phase interactive protection;
• Equipped with a condensation controller, ensuring reliable operation of the circuit breaker under specific temperature and humidity conditions.