Outdoor high voltage vacuum circuit breaker ZW7-40.5

Description

ZW7-40.5 outdoor high-voltage vacuum circuit breaker is used for three-phase power system with ac 50Hz and voltage of 40.5kv, for breaking and closing load current, overload current and short circuit current. 

Working conditions

1.the ambient air temperature: cap+ 40℃, the minimum - 30℃;

2.Altitude: 2000m(if elevation is needed, the rated insulation level shall be increased accordingly); 

3.Wind pressure: not exceeding 700Pa(equivalent to 34m/s wind speed); 

4.amplitude: seismic intensity 8 degrees;

5.Pollution level: level III;

6.the maximum daily temperature difference: no more than 25℃.

Model and meanings

Features and advantages

1.Vacuum arc extinguishing, strong breaking ability, long electrical life and 10,000 mechanical life;

2.simple structure, no maintenance, no long maintenance cycle; 3, good insulation performance, anti-pollution ability; 

4.can be equipped with spring or electromagnetic operating mechanism, mechanical performance is reliable, frequent operation; No fire and explosion hazard; 

5.Built-in current transformer with accuracy up to 0.2 level can realize three-phase interactive protection;

6.The built-in condensation controller can keep the circuit breaker running reliably under certain temperature and humidity .

Main technical parameters

Outline and mounting dimensions