The DC resistance of a transformer is a mandatory test item in transformer manufacturing for semi-finished and finished products, factory acceptance tests, installation, major repairs, after changing tap changers, handover tests, and preventive tests by power departments. It can check the welding quality of winding joints and whether there are inter-turn short circuits in the windings. It can detect whether the contacts of the voltage tap changer are in good condition at each position, whether the actual position of the tap changer matches the indicated position, whether the lead wires are broken, and whether there are broken strands in multi-strand parallel windings. To meet the need for rapid measurement of transformer DC resistance, our company has developed the GDZRC-100A DC Resistance Tester. This instrument adopts brand-new power supply technology and features small size, light weight, large output current, good repeatability, strong anti-interference capability, and comprehensive protection functions. The whole machine is controlled by a high-speed microcontroller, with a high degree of automation, and has automatic discharge and discharge alarm functions. The instrument has high testing accuracy and is easy to operate, enabling rapid measurement of transformer DC resistance. 10A DC Resistance Tester