Abstract: Aiming at the problems of single type and low efficiency of the detection equipment for low-voltage electrical appliances such as isolating switches or knife switches, a detection device compatible with both types of switches was developed. By optimizing the mechanical structure and the detachable reversing mechanism, the rapid switching of detection modes was achieved. A hardware system was constructed with Mitsubishi PLC as the core and servo motors and reducers as the actuating mechanisms. A visual software was developed, featuring parameter configuration, motion control, status monitoring, and secondary development functions. Tests show that the device has a torque of 300-500 Nm, a speed of no less than 150 r/min, a significantly shortened mode switching time, and a notable improvement in efficiency and accuracy. It also demonstrates good stability and compatibility, providing efficient and multi-functional equipment support for the industry.