农村配电变压器运行方式的探讨（Discussion on the operation mode of rural distribution transformer）.doc

农村配电变压器运行方式的探讨（Discussion on the operation mode of rural distribution transformer） Discussion on the operation mode of rural distribution transformer Abstract: three kinds of rural distribution transformer low voltage power network operation mode in this paper is analyzed and discussed, put forward in the rural reconstruction, due to the insulating level, suggest taking some complementary measures, TT system will be changed to IT system, in order to improve the reliability of power supply. Key words: distribution transformer; low voltage power network; operation mode According to the technical regulations of rural low voltage power supply, the operation modes of low voltage power network in rural distribution transformer are three kinds, IT system, IN-C system and TT system. IT system refers to the special requirements or special low-voltage power distribution transformer and network security, and should adopt the neutral point grounding electrical equipment exposed conductive parts protection grounding mode; IN-C system refers to the rural towns, industrial and mining enterprises of distribution transformer low voltage power network should be adopted, and neutral grounding, electrical the equipment exposed conductive parts connected to zero; the TT system refers to the use of electricity and other power distribution transformer low voltage power network and neutral grounding should be adopted in rural residents, electrical equipment exposed conductive parts protection grounding mode, and the TT system should be installed leakage protection device. 1, the advantages and disadvantages of the three modes of operation Part of the factory system, because of its low voltage power network range, insulation easy to guarantee, power supply security, power supply reliability and economy are better. Using the TN-C system, the power supply reliability is relatively poor, because any electrical equipment has exposed conductive leakage current, over-current protection should be