Product Introduction
The measurement of DC resistance of transformer windings is an essential testing item during the delivery, maintenance, and replacement of tap changers in transformers. This instrument adopts a new power supply technology, which has the characteristics of stable performance, fast testing, small size, light weight, easy operation, high measurement accuracy, and good data reproducibility. It is an ideal equipment for measuring transformer windings and DC resistance of high-power inductance devices.
Technical parameters
| Item | Technical specifications and parameters | Remarks |
| Measure current | 1A, 5A, 10A, 20A | / |
| Measure Range | 1A：10mΩ~20Ω | / |
| 5A：1mΩ~4Ω | ||
| 10A：1mΩ~2Ω | ||
| 20A：1mΩ~1Ω | ||
| Accuracy | ±0.2%（full range） | / |
| Data Storage | 255 | |
| Display | LCD | Resistance display：4 1/2 bits |
| Maximum resolution | 0.1μΩ | / |
| Power supply | AC 220V±22V，50Hz±2 Hz | Fuse 5A |
| Maximum Power Dissipation | 300W | Test current：10A/hour |
| Work Environment | Temperature：0℃～40℃ | / |
| Relative Humidity：≤80%RH | ||
| Dimension | 200╳400╳280 (mm) | / |
| Weight | 6kg | Including accessories |
Product Features
1. The three-phase DC resistance tester can simultaneously test the DC resistance of the three-phase windings of transformers, greatly reducing measurement time
2. Can quickly and accurately measure the DC resistance of transformer windings
3. Equipped with comprehensive protection functions
4. Compact in size and easy to carry
5. LCD full English menu, easy and intuitive operation
6. Fast testing speed, high accuracy, good data repeatability, and strong anti-interference ability
