With the social and economic development of China's power grid, in the medium voltage distribution grid applications 24KV power supply voltage level, has the following advantages.

? Increase the main transformer capacity, improve power substation capacity.

· Improve transmission capacity and distribution lines, reducing the number of distribution lines.

? Increase the supply pressure line radius.

MV · improve quality of power supply.

? Reduce energy loss in voltage grid.

· Conservation and land resources in non-ferrous metals.

Earlier this voltage level in a small area test run by the State Grid Company, by the Jiangsu provincial pilot promotion 20KV voltage levels, now South network also ready to promote in Guangdong and other places began to 20KV voltage level can be predicted, the device will eventually 24KV dominate the market.

Use of the environment

· Altitude ≤1000m · monthly average relative humidity ≤90%

· Top ring to bring the temperature + 40 ℃ · seismic capacity of 8

· Minimum temperature -35 ℃ · ring-pull system rated frequency 50HZ

· The maximum daily temperature in 25K · SF6 leakage rate ≤O.1%

· Daily average relative humidity ≤95% · Enclosure protection class IP3X

Technical parameters