Outline

ZW7-40.5 Outdoor HV vacuum circuit breaker for AC .50Hz, electric Bi40.5kV three-phase power system, as breaking, closing load current, overload current and short circuit current purposes.

Type Meaning

The main function

. a vacuum interrupter, breaking ability, long life, mechanical life 10,000 times;

. b simple structure, maintenance-free, long maintenance period;

. c good insulation performance, strong anti-contamination ability;

. d can be equipped with a spring or electromagnetic actuator, reliable mechanical performance, frequent operation; no fire and explosion hazards;

. e built-in current transformer, accuracy of 0.2, enabling interactive three-phase protection;

f. Included condensation control, to maintain reliable operation of the circuit breaker at a certain temperature and humidity.

Environmental conditions

. a surrounding air temperature: up to + 40 ℃, the lower limit of -30 ℃;

. b altitude: ≤2000m (For higher altitudes, the rated insulation level corresponding increase);

. c pressure: less than 700Pa (equivalent to wind speed 34m / s);

. d Amplitude: seismic intensity of 8 degrees;

. e filthy: Class Ⅲ;

. f maximum daily temperature difference: no more than 25 ℃.

The main technical parameters