FZW28-12 type outdoor high-voltage AC vacuum load switch is rated frequency 50Hz, rated voltage 12kV outdoor distribution switchgear. It is mainly used to break load, overload current, closing load, overload and short circuit current in power system. It is suitable for the protection and control of the power distribution system of overhead lines and industrial and mining enterprises. It is also suitable for the rural power grid and frequently operated places. It is especially suitable for the transformation of urban and rural power grids. Vacuum arc extinguishing, SF6 external insulation, built-in isolation knife and arc extinguishing chamber asynchronous linkage, switch closing ability is strong, good safety.
Environmental conditions for use of fzw28-12 boundary load switches
1) The upper limit of ambient air temperature shall not exceed 40ºC or -45ºC without limitation;
2) The wind speed is no more than 35m/s;
3) Altitude not higher than 1000m, seismic intensity not more than 8 degrees;
4) Environmental humidity: the monthly average relative humidity is no more than 90%; The average daily relative humidity is not more than 95%;
5) The ice thickness shall not exceed 10mm;
6) The installation site shall be free from inflammable, explosive, chemical corrosion and frequent violent vibration;
7) Neutral grounding mode: neutral point is not grounded, neutral point is grounded by arc suppression coil, neutral point is grounded by small resistance.
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