Transformer capacity tester

The utility model relates to a transformer capacity tester, and belongs to the technical field of electric power testers. Comprising a scanner, a character processor, a display operation screen, a capacity detection circuit, a power supply circuit, a miniature printer and a central processing unit. The scanner collects nameplate information of a transformer, converts the nameplate information into corresponding text information and transmits the text information to the central processing unit, the capacity detection circuit detects capacity parameters of the transformer, and the central processing unit selects corresponding short-circuit impedance according to the corresponding nameplate information. Capacity calculation and nameplate capacity comparison are completed according to the capacity parameters, and a detection result is visually displayed through a display operation screen and a miniature printer. The problems that in the existing transformer capacity detection process, the test program is tedious,