Hand-held transformer station CT polarity tester

The utility model discloses a hand-held transformer station CT polarity tester comprising a housing and an end cover which are detachably connected. A power supply unit is arranged in the shell and is used for providing output voltage required by detection; an arc-shaped protrusion is arranged on the shell, a groove is formed below the arc-shaped protrusion, and a chamfer is arranged on the edge of the groove. The shell comprises an operating part and a holding part, the operating part is provided with four binding posts and a milliammeter from top to bottom, the four binding posts are arranged side by side, and the holding part is provided with a switch and a knob. According to the utility model, the protective shell is arranged, the power supply unit, the acquisition unit and the processing unit are arranged in the shell, and devices in the shell are protected through the shell. The shell comprises the operation part and the holding part, storage and carrying are convenient, an operator can operate the test