6kV母线电弧光保护研究与应用

电厂厂用电6 kV母线系统出线多,操作频繁,三相导体线间距离与大地的距离比较近,运行条件恶劣,系统运行方式改变频繁,时常发生电弧光故障。在6 kV母线上安装电弧光保护装置,分别动作于母线电源进线开关和备用电源进线开关,同时闭锁快切装置。当电弧光故障发生,装置会在1 ms内发出跳闸输出信号,迅速切断故障源,确保人身及设备安全。

Research and Application of Arc Light Protection in 6 kV Bus

The 6 kV bus system for the power supply of a power plant has lots of joints,and frequent operations done to it.With a short distance to the ground from the three phase wires,the system runs under a harsh condition and the modes of it are often changed,resulting in a frequent electric arc fault.An electric arc protection module is applied to the 6 kV bus,which operates the switches of the bus power supply and the backup power supply respectively,meanwhile blocking fast switching device.When an electric arc fault occurs,the device will send an output signal within 1 ms,and cut off the fault source quickly,to ensure personal and equipment safety.