ZW7-(33-40.5)KV series outdoor AC high-volt vacuum circuit breaker is one new circuit breaker with high quality manufactured which is developed on basis of absorbing world advanced technique and taking power net actual circumstance in our country into account. This product owns many advantages asrational designing, strong complete capacity, novel appearance, safe&reliable, easily maintaining, long electric endurance etc, it is one perfect equipment replacing 33- 40.5KV outdoor dead tank oilcircuit breaker, which has achieved international level of 1990s.

ZW7-(33-40.5)KV model outdoor AC high-volt vacuum breaker owns following standards:
National standard GB 1984-1989
National standard IEC56

The 1^st item: usage
ZW7-(33-40.5)KV model outdoor AC high-volt vacuum breaker is control and protective equipment of power net, which is applied to AC50Hz three-phase power system, to be used for breaking and making load current, overload current and short current.

The 2^nd item: operating environment
1. ambient air temperature ranges from -30 to +40°C (the lower limit is -40°C in severe cold zone);
2. altitude is not higher than 4000m;
3. wind pressure is lower than 700pa (equal to 34m/s wind speed);
4. air pollution degree is IV class .
5. certain place without fire, explosion danger, chemical corrosion or violent vibration;