DLCS-2000 series of intelligent low-tension comprehensive safety protection device is mainly used in the controlling system of low-tension motor below 690V, which conducts protection to the overload, short circuit, starting with overlong time, blocked rotor, unbalance, grounding, undervoltage, overvoltage and technical interlocking etc. faults of the motor, and integrates the comprehensive three-phase electrical measurement/display, digit input/output and network communication together. Each device has many measuring function for comprehensive electrical parameters, which can not only be used as electric measuring instrument, but also can be used as the front end of the comprehensive automatic monitoring system for electric, thus it can realize measurement, monitoring, protection and control etc. comprehensive functions, conduct easy access through the analog output port with isolated gate and DCS system. It communicates with the monitoring system through the standard RS-485 communication interface and twisted-pair network, and easily realizes the remote control for the data and “four-remote” functions.