RXE302 intelligent distributed device is mainly applicable to the protection, measurement and control of the interval unit of ring network cabinet of 10kV and below voltage level. It is equipped with perfect protection, measurement, control and communication monitoring functions, and cooperates with circuit breakers, load switches and other switches to provide protection for the lines of 10kV and below, and quickly resect and isolate the fault areas, so as to strongly guarantee the safe and stable operation of the distribution network system.