Outdoor Vacuum Circuit Breaker--ZW32Y-12

ZW32Y-12/630-20/25 outdoor permanent magnetic MV vacuum on pillar dry circuit breaker (hereinafter referred to as circuit breaker), is the control and protection equipment used in rated voltage 12KV, 50HZ AC three phase high voltage distribution grid. Mainly used for load current, overload current and short-circuit current breaking, closing in the power lines. Applied to substation and industrial and mining enterprises in power system used for protection and control purposes

Product Detail

Operating conditions

1. Ambient temperature: upper limit +40℃, lower limit -30℃;
2. Altitude: ≤2000m;
3. Wind pressure: not more than 700Pa (corresponding to the wind speed 34m/s);
4. Earthquake intensity: do not exceed 8 degree;
5. Pollution grade: III class;
6. Maximum daily temperature variety less than 25℃ .

Technical data

Rated voltage: 12kV
Rated frequency: 50Hz
Rated current: 630A
Rated short-circuit breaking current: 20kA/25kA
Rated peak withstand current (peak value): 50kA
Rated 4s withstand current: 20kA
Rated short-circuit making current (peak value): 50kA
Mechanical life: 30,000 times
Number of breaking operations at rated short-circuit breaking current: 30 times
Power frequency withstand voltage (1min) (wet) (dry) between phases, to the ground / across the open contacts: 42/48kV
Lightning impulse withstand voltage (peak value) between phases, to the ground / across the open contacts: 75/85kV
Power frequency withstand voltage for the secondary circuit within 1min: 2kV