-
Leon Zhang sales consultant
-
Email: zxl635973785@gmail.com
-
Phone/WhatsApp/Wechat: +86 13655813266
HF-TC-602 Transformer DC Winding Resistance Tester
This transformer DC winding resistance tester adopts Kelvin four-wire method to eliminate line resistance interference. It quickly measures winding DC resistance of transformers and reactors, with automatic discharge, temperature compensation and overcurrent protection. Compact and portable, it stores and prints test data, ideal for factory inspection, substation maintenance and engineering acceptance to detect poor connections and broken strands.
Send your requirements, we will quote for you within 12 hours
Introduction
Transformer DC Winding Resistance Tester is professional testing equipment for transformer quality inspection. DC resistance measurement of transformers is a mandatory test item for semi-finished and finished product factory inspection, on-site installation, handover acceptance and preventive maintenance conducted by power utilities. It can effectively detect manufacturing defects and potential operational faults such as improper coil material selection, poor welding, loose connections, missing strands and broken wires, ensuring the safe and stable operation of power transformers.
This innovative tester is equipped with a built-in large-capacity lithium battery and adopts an integrated design of main unit and test cables. Compact and lightweight, it is easy to carry. It can measure inductive loads including transformers, instrument transformers and reactors, as well as resistive objects such as copper busbars, wires and switch contacts, featuring fast testing speed and high measuring accuracy.
Packing List & Inspection Instructions
Unpack the shipping carton upon receipt and inspect for any external damage. If the carton is crushed or cushioning materials show obvious indentations, notify the logistics provider and our nearest sales office immediately.
Verify that the following standard accessories are included in the package:
| No. | Item Description | Quantity | Remark |
|---|---|---|---|
| 1 | Main Tester Unit | 1 Set | – |
| 2 | Test Lead Set | 1 Set | Including 1 red cable, 1 black cable and 1 grounding wire |
| 3 | 16.8V Charger | 1 Piece | – |
| 4 | Printed User Manual | 1 Copy | – |
| 5 | Certificate of Conformity & Factory Test Report | 1 Set | – |
Features
◆ Dual power supply adaptive design: built-in lithium battery or AC 220V mains input. A single full charge supports DC resistance testing for over a hundred transformers with simple and straightforward operation.
◆ Six selectable output current gears, maximum output current up to 10A and maximum output voltage 25A; automatic current selection is available for higher efficiency.
◆ Wide measuring range from 500 microohms to 50 kiloohms with outstanding measurement precision.
◆ Supports automatic temperature conversion for resistance values.
◆ Multiple protection mechanisms including back EMF protection, open-circuit protection, power-off protection and overheating alarm.
◆ 4.3-inch industrial high-brightness color LCD screen with clear display under direct strong sunlight.
◆ Supports local on-board data storage and USB flash drive data export.
Application of Transformer DC Winding Resistance Tester
1. Factory Quality Inspection for Transformers
It is a compulsory test for semi-finished and finished transformers before delivery. It detects manufacturing defects including unqualified winding materials, poor welding, loose wiring terminals, broken strands and internal wire breakage to verify product qualification.
2. Handover & Acceptance of Power Engineering
Conduct on-site tests on newly installed transformers before commissioning in substations and power distribution projects. It serves as a core acceptance standard to confirm correct wiring and eliminate poor contact issues.
3. Routine Preventive Maintenance of Power Grid
- Regularly measure DC resistance of three-phase windings and calculate three-phase unbalance rate to quickly locate winding faults.
- Troubleshoot common failures such as poor contact, wrong tap positions and oxidized/burned contacts of tap changers.
- Inspect transformers after short-circuit trips to check for inter-turn short circuits, wire breakage and winding deformation.
4. Testing of Other Electrical Equipment
Measure winding resistance of reactors, current transformers and voltage transformers. It also tests contact resistance and connectivity of copper busbars, cables and circuit breaker contacts.
5. Data Archiving and Traceability
Equipped with functions of data storage, printing and temperature conversion. Test records can be filed for later review, fault analysis and data comparison.
FAQ of Transformer DC Winding Resistance Tester
Q1: What is the main function of this transformer DC winding resistance tester?
A1: It is professionally used to measure the DC resistance of transformer windings, reactors and instrument transformers. It effectively detects poor welding, loose connection, broken strands and internal faults to ensure power equipment safe operation.
Q2: Does this tester support built-in battery power supply?
A2: Yes. It adopts dual power supply design, supporting both built-in lithium battery and AC 220V mains power. Fully charged battery can support more than 100 times of transformer testing for outdoor field work.
Q3: What is the maximum test current and measuring range?
A3: It provides 6 optional current gears with max 10A output current. The measuring range covers 500μΩ to 50kΩ, meeting testing requirements for most distribution and power transformers.
Q4: Does it support automatic temperature compensation?
A4: Yes. It can automatically convert the measured resistance value to standard temperature resistance, ensuring consistent and accurate test data in different ambient temperatures.
Q5: Is the instrument safe for inductive load testing?
A5: Absolutely safe. It is equipped with back EMF protection, automatic discharge, open-circuit protection and overheating alarm to avoid equipment damage and ensure operator safety.
Q6: Can it store and export test data?
A6: Yes. It supports local data storage and USB flash drive data export, and can print test reports on site for project acceptance and file archiving.
Q7: Is the machine portable for outdoor site use?
A7: Yes. Integrated cable and host design, compact and lightweight. The 4.3-inch high-brightness screen keeps clear display even under strong sunlight, perfect for substation maintenance and field commissioning.
Be the first to review “HF-TC-602 Transformer DC Winding Resistance Tester”
Reviews
There are no reviews yet.