XHZ1340A
DC resistance testing is essential for transformers throughout their lifecycle—from semi-finished/finished product factory checks to installation, handover, and routine preventive maintenance by power authorities. This test pinpoints critical issues including substandard coil materials, poor welding, loose joints, missing strands, and wire breakages during production, as well as hidden risks post-operation.
To address the need for efficient DC resistance measurement, our company has engineered the Transformer DC Resistance Tester using core technical expertise. This next-generation tester combines magnetizing testing, three-phase measurement (Yn, Y, △), and demagnetization capabilities, positioning it as the premier solution for large power transformer DC resistance testing. Its true-color high-resolution large LCD screen, touch operation, and shuttle knob enable effortless on-site use; with intuitive Chinese menu guidance, a single wiring setup completes all tests—delivering unmatched speed, precision, and a broad measurement range.
Technical Parameters
| Output Current |
Single Phase: 40A, 20A, 10A, 5A, 1A, 0.2A, 10mA, <1mA
Three Phase: 20A+20A, 10A+10A, 5A+5A, 1A+1A, 0.2A+0.2A
|
| Measuring Range |
Single Phase
40A Range: 0.1mΩ～0.5Ω
20A Range: 0.5mΩ～1Ω
10A Range: 1.0mΩ～2Ω
5A Range: 10mΩ～4Ω
1A Range: 0.1Ω～20Ω
0.2A Range: 10Ω～100Ω
10mA Range: 50Ω～2kΩ
<1mA Range: 500Ω～25kΩ
Three Phase
20A + 20A Range 0.5mΩ ～ 400mΩ
10A + 10A setting: 1.0mΩ ～ 800mΩ
5A + 5A setting: 10mΩ ～ 1.6Ω
1A + 1A setting: 0.1Ω ～ 8Ω
0.2A + 0.2A setting: 1Ω ～ 40Ω
|
| Accuracy |
±(reading × 0.2% + 2 digits) |
| Operating Power Supply |
AC220V±10%, 50/60Hz |
| Operating Temperature |
-10℃～50℃ |
| Relative Humidity |
<90%, non-condensing |
Troubleshooting
1. When testing the no-load tap changer winding, switching the no-load tap changer is not permitted during testing or before it is fully discharged;
2. Test leads must not be removed during testing;
3. During high-voltage terminal testing, the medium-voltage and low-voltage terminals of the transformer must be open-circuited;
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