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guangzhou 110kv jianfeng substation, the first 3c green demonstration project of china southern power grid, is located in the west of kaichuang avenue and the north of science avenue, science city, luogang district, guangzhou. the main transformer capacity is 3×63mva, with 3 110kv outlet times and 45 10kv outlet times. the station officially started construction on november 28, 2011, and was successfully put into operation on november 26, 2012. zhengchao is the only supplier of 10kv metal-armored shift switchgear (electric type). the successful operation of guangzhou 110kv jianfeng substation marks the beginning of the construction of 3c green substation of china southern power grid, and also a new milestone of zhengsuper development.