System for automatic testing of TTU device

The utility model relates to a system for automatic testing of a TTU device. The system comprises a PC, a high-precision power source, a three-phase standard meter, a relay module, an RTD measurement module and a multi-serial port card. The high-precision power source, the three-phase standard meter, the relay module and the RTD measurement module are respectively in communication connection with the PC; the high-precision power source, the three-phase standard meter, the relay module and the RTD measurement module are respectively connected with a port of a TTU device to be measured through the terminal connector; the TTU device to be tested is in communication connection with the PC through the multi-serial port card; the PC controls the acquisition and output signals of the high-precision power source, the three-phase standard meter, the relay module and the RTD measurement module, obtains the response of the TTU device at the same time, and judges whether the function of the TTU device is normal or not. A