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Scope of Application

ZW32-12 / M-type permanent magnet vacuum circuit breakers using a unique design of permanent magnet mechanism and high reliability of intelligent controller form. The device is mainly used in medium-voltage overhead line power grid, as load, combined load current, overload current, short circuit current, and has 0 to 3 times automatic reclosing.
1. Extremely high reliability
2. Completely maintenance-free throughout life
3. with high mechanical life and electrical life
4. The machine is small, light weight, easy to install
5. With standard protection and fast automatic reclosure function

Conditions of Use

1. Ambient air temperature: -30 ℃ ~ +60 ℃;
2. Altitude: not more than 3000 meters;
Wind speed does not exceed 34m / s;
4. From the switchgear and control equipment outside the vibration or ground is negligible;
5. Pollution level: Ⅳ level;
6. Storage temperature -40 ℃ ~ +85 ℃.

Main technical parameters

NO. Project Unit Value
1 Rated voltage kV 12
2 Rated current A 630
3 Rated frequency Hz 50 or 60
4 Power frequency withstand voltage 1min (wet) (dry) and white, to the ground / fracture kV 30 42/49
5 Lightning impulse withstand current (peak) phase to ground / fracture kV 75/85
6 Rated short-circuit breaking current kA 20
7 Rated short-circuit current (peak) kA 50
8 Rated peak withstand current kA 50
9 4S short-time withstand current kA 20
10 Rated operating cycle
Points -0.1s-combined points -3s-combined points -6s combined points -60s recovery
11 Rated short-circuit current breaking times Time 30
12 Mechanical life Time 30000
13 Permanent magnet control voltage V DC220
14 Secondary circuit 1min frequency withstand voltage KV 2

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