ASZ-413 Digital Input Reserve Power Switching Device disconnect of main power failure or other reasons, automatic standby power to work the line supply mutual investment and functions, and the main source of re-energized, off the standby power supply, put into the main source of self-recovery function in order to achieve the working power. Main functions: a) into the line BZT function; b) composite voltage start-up overcurrent protection; c) Overload protection; d) PT wire-break monitoring; e) event logging, fault recorder function; f) CAN data communication function