● It is applicable to residential areas, small distribution stations, industrial and mining enterprises, large shopping malls, hospitals, high-rise buildings, stadiums, expressways, railway tunnels, municipal key projects, and other places using urban power distribution system.

● It is used for three-phase AC 50Hz power distribution system and power consumption terminal  for receiving and distributing electric energy at 12kV side only.

●The technology is advanced, the performance is stable, the structure is reasonable, the use is convenient, and the safety is reliable.

Normal service conditions

●The ambient air temperature shall not exceed 40℃, and the average temperature measured within 24 hours shall not exceed 35℃.

●Minimum ambient air temperature - 15℃

● Altitude no more than 1000m

● The surrounding air is not obviously polluted by dust, smoke, corrosive and/or combustible gas, vapor, or salt mist.

● Humidity conditions

  。The average relative humidity measured within 24h no more than 95%.

  。The average monthly relative humidity no more than 90%.

  。The average water vapor pressure measured within 24h no more than 2.2kpa.

  。The average monthly water vapor pressure no more than1.8kpa.

● The amplitude of electromagnetic interference induced in the secondary system shall not exceed 1.6kv.

★ For special use conditions exceeding normal use conditions, please consult to reach an agreement.