Transformer DC resistance tester

The utility model discloses a direct current resistance tester for a transformer, relates to the technical field of resistance testers, and aims to provide a direct current resistance tester for a transformer, which has the advantages that the shape of a protective shell is changed, the impact resistance is enhanced, the heat dissipation effect is good, and the service life of the device is prolonged. The technical key points are that the four side surfaces of the protective shell are arc-shaped surfaces protruding outwards, and an air flowing area is formed between the side wall of the testing machine body and the inner wall of the protective shell, so that the technical effects are that the arc-shaped surfaces protruding outwards are formed on the side surfaces of the protective shell, external impact force can be dispersed, the impact resistance of the protective shell is greatly guaranteed, and the service life of the testing machine is prolonged. Meanwhile, the side face of the protective shell protrudes