Brief introduction
DC resistance measurement of transformer winding is a very important test project. In the "electrical equipment test procedures", it ranks second in transformer test project. "Electrical equipment test procedures" provides that it is necessary to measure the DC resistance of transformer windings during transformer transfer, heavy maintenance, and light maintenance, changing tap joint position, troubleshooting and pre-test, which aims to:
- Check the welding quality of lead and down-lead within the winding;
- Check whether the contact of each tapping switch position is good.
- Check whether the winding or down-lead is broken.
- Check whether the parallel branch is correct and whether the winding winded by several parallel wires has one or several disconnection.
- Check whether layer or inter-turn is short circuit.
Products features
1. Controlled by micro-computer, can save test results.
2. CD backlit display to the instrument makes it easy to operate.
3. Use current source linear compensation technique not only improves efficiency, speed and measurement accuracy, but also makes the test stable. This reduces the operator's work intensity.
4. Adopting "four-terminal" measurement method in technical, it eliminates the measurement error caused by down-lead resistance and contact.
5. Panel printer can quickly print measurement results (optional).
6. The instrument with Over-voltage protection devices can prevent the impact of counter electromotive force.
7. The instrument is small size, light weight, and easy to carry.
8. This equipment applies to measure and analysis all kinds of transformers, mutual inductor winding and others sensitivity, low resistance.
Product parameters
| Main product parameters |
Measurement range |
0~2000Ω(6 gears) |
| Measurement current |
5A(20mΩ~2Ω)
0.5A(20Ω);0.05A(200Ω);0.005A(2000Ω) |
| Resolution |
1μΩ(20mΩ ) |
| 10μΩ(200mΩ) |
| 0.1mΩ(2Ω) |
| 1mΩ(20Ω) |
| 10mΩ(200Ω) |
| 0.1Ω(2000Ω) |
| Power consumption |
≤100W |
| Temperature and humidity |
0ºC~40ºC; ≤85%RH |
| Power |
AC220V 50HZ (±10 %) |
| Dimension |
350×260×140mm3 |
| Weight |
3kg |
Common problem
1. Is your company a sales company or a manufacturer?
Wuhan Huatian Electric Power Automation CO., LTD.is an industrial and trade enterprise, with its own factory, self-produced and self-sold. We were founded in 2004 and have fifteen years of production experience. Our company has reliable production lines, test rooms and R&D centers.
2. Whether the goods are in stock, whether they can be customized, and how long the delivery time is.
After the goods have been ordered, we can be made to order according to the special requirements of customers by using the latest technology. The delivery time is usually within 10 working days if there are no accidents.
3. Is the quality guaranteed?
In order to ensure quality, we use imported components in large quantities. After three times of quality inspection, the goods can be sent out, and the export is uniformly packed in non-fumigation wooden boxes.
4. What are the after-sales terms?
We offer free consulting service, one year warranty, and adopt various methods such as email communication, video calls, technology door-to-door, aiming to solve any after-sales problems in a timely manner.
5. What are the cooperative countries or regions?
Products have been successfully exported to the United States, Brazil, Australia, Russia, the Netherlands, Indonesia, Bangladesh, Iran, India, Saudi Arabia, Mongolia, Japan and other countries and regions. In the United States, India, Vietnam and other regions have cooperative distributors, can provide thoughtful services.
Contact us
Wuhan Huatian Electric Power Automation CO., LTD
Address: T4, No. 1, High-tech 2 Road,East Lake High-tech Development Zone,Wuhan
Zip code: 430074
Tel:(+86)-27-8745 7960 / (+86)027-87993136 / 13808601259
Fax: (+86)-27-8799 3136
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