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1.引言 本冶炼厂供电系统采用小电流接地运行方式。 随着冶炼厂的生产规模逐渐扩大,投运的电缆线路越来越多,在本厂总降压变电站的近100条6kV出线中,几乎全部为电缆线路,其总长度约为30km。此外,全厂还有25台高压电动机。在全厂所有用电设备都投入运行时,经推算,系统接地电容电流为80～90A,1999年9月,经邯郸市旭辉电力自动化设备公司人员和本厂技术人员现场实测,总降压变电所6kV母线的接地电容电流为71.8A。
1. Introduction The smelter power supply system uses a small current grounding operation. With the gradual expansion of the smelter’s production scale, more and more cable lines have been put into operation. Almost all of the 6kV outlet lines of nearly 100 substations in our plant have a total length of about 30km. In addition, the whole plant there are 25 high-voltage motors. In the whole plant, all electrical equipment are put into operation, the projections, the system ground capacitance current is 80 ~ 90A, September 1999, Handan City, Xuhui power automation equipment company personnel and factory technicians on-site measurement, the total buck Substation 6kV bus grounding capacitance current is 71.8A.