35kV Outdoor High Voltage Vacuum Circuit Breaker ZW7-35kV/1250A | 40.5kV Three-phase Power System Core Protection Equipment

Overview

ZW7-35kV/1250A Outdoor High Voltage Vacuum Circuit Breaker (i.e. ZW7-40.5 type) is used in AC 50Hz, 40.5kV three-phase power systems for breaking and making load current, overcurrent and short-circuit current.

Main Functions

• Adopts vacuum arc extinguishing, strong breaking capacity, long electrical life, mechanical life 10000 times;
• Simple structure, maintenance-free, long inspection cycle;
• Good insulation performance, strong pollution resistance;
• Can be equipped with spring or electromagnetic operating mechanism, reliable performance, frequent operation, no fire or explosion hazard;
• Built-in current transformers with built-in accuracy up to Class 0.2, achieving three-phase protection;
• Built-in condensation controller ensures reliable operation of the circuit breaker under certain temperature and humidity conditions.

Model Meaning

Service Environment Conditions

• Ambient air temperature: upper limit +40degC, lower limit -30degC;
• Altitude: ≤2000m (if altitude increases, rated insulation level shall be increased accordingly);
• Wind pressure: not exceeding 700Pa (equivalent to wind speed 34m/s);
• Seismic intensity: 8 degrees;
• Pollution level: Class III;
• Maximum daily temperature difference: not exceeding 25degC.

Main Technical Parameters

Outline and Installation Dimensions