EM520L low-voltage line protection device is suitable for low-voltage systems below 380V (690V). It is a new generation of intelligent integrated device for the protection, monitoring and control of low-voltage feeders. In addition to advanced line protection, control and monitoring functions, it also provides operation records , Trip records and other important information, bring great convenience to modern equipment management. EM520L device is widely used in various industries such as petrochemical, electric power, coal mine, smelting, railway and civil construction.