FC回路高压接触器限时电流速断保护定值的选择方法

Choice of FC circuit high voltage contactor time limit current quick break protection value

通过对发电厂6 kV厂用系统FC回路短路故障电流的计算和对NT型高压熔断器安-秒特性的分析,结合高压电动机在启动、堵转和轴承机械卡塞时的电流特性,给出了FC回路高压接触器限时电流速断保护定值的选择方法。

By calenlating the fault current of 6kv system FC circuit in power plant, and analyzing the ampere - second characteristic of NT type high voltage fuse, while considering the current characteristics when the high voltage motor started, stopped because of blockage, and bearing blocked, the choice method of FC circuit high voltage contactor time limit current quick break protection value was supplied.