Microcomputer spare power automatic switching protection teaching device

The utility model relates to the field of teaching devices, and discloses a microcomputer spare power automatic switching protection teaching device, which comprises a control mainboard, a central processing unit, a human-computer interface and an upper computer. The control mainboard transmits signals to the central processing unit, the central processing unit transmits data to the human-computerinterface through the transceiver, and the central processing unit transmits data signals to the upper computer through the controller. According to the microcomputer spare power automatic switchingprotection teaching device of the utility model, over-current protection, reclosing and post-acceleration functions are set in two incoming lines; whether incoming line tripping is overcurrent protection tripping or incoming line voltage loss can be intelligently judged, spare power automatic switching is carried out if incoming line voltage loss occurs, reclosing is carried out if overcurrent protection tripping occurs, a