As core components of power systems, transformers’ long-term reliable operation is vital to overall system stability and reliability.

Transformer DC resistance is a mandatory test for manufacturing (semi-finished/finished products), installation, handover, and preventive maintenance, enabling detection of manufacturing defects (e.g., coil material/welding issues, loose connections, missing strands, breaks) and operational hazards. To enable rapid DC resistance measurement, our company has developed the Transformer DC Resistance Tester using proprietary technology. This new-generation tester combines magnetizing method testing, three-phase testing (Yn, Y, △), and demagnetization, making it ideal for large power transformers. It features a true-color high-resolution large LCD screen, touch + shuttle knob operation for on-site convenience, Chinese menu prompts for intuitive use, one-time wiring for all tests, fast speed, high accuracy, and a wide range.

Packing Contents

Upon receiving the shipping box, open it and inspect for damage. If the shipping box is damaged or the padding material has dents, please notify the shipping company and your nearest sales office.

Please check if you received the following items in the complete set of equipment:
Standard Configuration:

√ 1 tester

√ 1 set of test leads (2 each of yellow, green, red, and black)

√ 1 three-core power cord

√ 1 grounding wire

√ 3 fuses

√ 2 rolls of printing paper

√ 1 printed user manual

√ 1 factory test report

√ 1 certificate of conformity and warranty card

Output Current	Single Phase: 20A, 10A, 5A, 1A, 0.1A, 10mA, <1mA Three Phase: 10A+10A, 5A+5A, 1A+1A, 0.1A+0.1A
Measurement Range	Single Phase 20A Range: 0.5mΩ～1Ω 10A Range: 1.0mΩ～2Ω 5A Range: 10mΩ～4Ω 1A Range: 0.1Ω～20Ω 0.1A Range: 2.0Ω～200Ω 10mA Range: 50Ω～2kΩ <1mA Range: 500Ω～25kΩ Three Phase 10A + 10A Range: 0.5mΩ ～ 0.8Ω 5A + 5A Range: 10mΩ ～ 1.6Ω 1A + 1 Range A: 0.1 Ω ~ 8.0 Ω 0.1A+0.1A Range: 2.0 Ω ~ 80 Ω
Accuracy	±(reading × 0.2% + 2 digits)
Power Supply	AC220V±10%, 50/60Hz
Operating Temperature	-10℃～50℃
Relative Humidity	<90%, non-condensing