Digital PT-free intelligent operation and maintenance switch, system thereof, and application method of system

The invention provides a digital PT-free intelligent operation and maintenance switch, a system thereof, and an application method of the system. The switch comprises a first control unit, a sensor unit, a switch state detection unit, an operating mechanism, a first communication unit and a high-voltage capacitor power taking unit connected with the first control unit, the sensor unit is connectedwith the first control unit and is used for inputting an acquired analog signal to the first control unit, the first control unit is connected with the switching state detection unit to form a switching value input/output unit to control the operating mechanism to perform switching-on and switching-off so as to realize switching value output, and the first control unit is connected with the firstcommunication unit and is used for remotely monitoring and controlling the capacitor electricity-taking switch. Through a module detection mode, uninterrupted replacement can be realized, so that themaintenance efficiency is