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ZW12-12 is mainly used for distribution systems in country or city network, mines, railway and ports with 12kv level,  rated frequency 50hz, especially for outdoor overhead line, it switches on/off load current and over load or short current to switch and protect electric networks, matching with a disconnecting switch, the breaker can be a combined switch, the disconnecting switch is installed on the side of the breaker body, combining with the breaker by the angle iron under frame.

The breaker becomes a recloser  intelligence breaker, matching with a reclosing controller and PT ,the breaker has three segment compound protection of switch on rush current control, over current protection and short quick break, and it has 1~3times of reclosing ,low current ground protection, wired supervisory control functions ,it can also remote control under the pole, and regulate parameters of the breaker ,it is an ideal choice for spot switch and simple measurement switch outside country network substations . 

Normal working environment:

1. ambient temperature:+40℃~-40℃；
2. altitude:≤2000M，it should be custom-made for >2000M
3. wind pressure: ≤ 700PA(equivalent to wind speed 34m/s)
4. relative humidity: day value ≤95%,month value≤90% 
5. pollution class: Ⅳ
6. surrounding air id not polluted by corrosive gas or inflammable gas seriously;
7. no frequent excessive vibration.

Technical parameters

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