Three-Phase Transformer DC Resistance Tester 20A Touchscreen Jog Dial 25kOhm Range| XHZ1320AX

As key components of power systems, transformers' long-term reliable operation is critical to overall system stability and reliability. Transformer DC resistance testing is mandatory during manufacturing (semi-finished and finished products), installation, handover, and preventive maintenance, enabling detection of manufacturing defects such as coil material and welding problems, loose connections, missing strands, and breaks, as well as operational hazards. To enable rapid DC resistance measurement, this company has developed the Transformer DC Resistance Tester using in-house technology. This new-generation tester integrates the saturable magnetic circuit method, three-phase testing (Yn, Y, and Δ), and degaussing, making it ideal for large and medium power transformers. It features a true-color high-resolution large LCD screen, dual operation of touch control and jog dial, Chinese menu prompts for intuitive use, one-time wiring for all tests, fast speed, high accuracy, and a wide measurement range.

Product Image

• Three-phase measurement for Yn, Y, and Δ windings with automatic unbalance rate calculation
• 20A maximum output current and 25kΩ measurement range, integrating saturable magnetic circuit method and degaussing
• Automatic resistance change rate calculation at 5s, 15s, and 30s to prevent data misreading
• Multiple protections: 380V misconnection, back EMF, disconnection, power failure, bad grounding
• Thermal printer with 200 local data entries and USB disk mass storage
• 7-inch industrial true-color touch screen with full touch + jog dial dual operation

Designed for power sector preventive test teams and transformer handover and acceptance engineers who perform routine DC resistance measurement on distribution transformers (10kV/35kV) and medium-capacity power transformers. With a 20A output and seven single-phase current gears down to <1mA, it covers a measurement range up to 25kΩ, making it ideal for both low-resistance winding verification and high-resistance auxiliary winding measurement. Unlike higher-current testers optimized for large transformer manufacturing QC, this instrument is tailored for field preventive maintenance and handover acceptance testing where portability and wide-range measurement are priorities.

• 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 (20A)
• 2 rolls of printer paper