Product Introduction
The dc resistance tester with demagnetization function is essential during delivery, installation, and handover inspections for both semi-finished and finished transformers. It is also an indispensable part of preventive maintenance testing in the power sector. This testing helps identify manufacturing defects such as issues with coil materials, welding quality, loose connections, missing strands, and disconnections, while also enabling early prediction of potential hidden dangers after the transformer is put into operation.
The dc resistance tester with demagnetization function manufactures has been developed by leveraging our full technical advantages to meet the growing demand for rapid measurement of transformer DC resistance. Integrating three-phase test capabilities (supporting Yn, Y, and △ connections) along with a built-in degaussing function, this new-generation quick-testing device is ideal for measuring DC resistance in large transformers.
Featuring a large true-color high-resolution LCD screen with full-touch operation, the instrument offers a simple and intuitive user experience for on-site applications. It delivers fast testing speed, high accuracy, and a wide measurement range.
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Product function
1. Three-Phase Simultaneous Testing: It can test Yn-type, Y-type, and △-type windings in the same manner as three phases, and automatically calculate the unbalance rate between phases.
2. Wide Current Output and Measurement Range: The dc resistance tester with demagnetization function supplier offers single-phase output currents of 20A, 10A, 5A, 1A, and 0.1A, with a measurement range from 0.5mΩ to 200Ω. Three-phase output options include 10A+10A, 5A+5A, 1A+1A, and 0.1A+0.1A.
3. Integrated Demagnetization Function: The built-in degaussing function removes residual magnetism from the transformer core after DC resistance testing, preventing potential issues during subsequent tests or operation.
4. Automatic Stability Judgment: During testing, the dc resistance tester with demagnetization function automatically calculates the resistance change rate within 5s, 15s, and 30s, assisting operators in judging data stability and preventing misreading.
5. Comprehensive Protection: It features numerous protections against back electromotive force, disconnection, and power failure, ensuring safe and reliable operation.
6. Data Management: Equipped with a thermal printer, it supports 200 items of data storage locally and mass data storage in USB disks. It features a 7-inch industrial true color screen with full touch control for a comfortable and convenient user experience.
제품 특징
1. Comprehensive Three-Phase Testing: Supports testing of Yn-type, Y-type, and △-type windings using a unified three-phase method, with automatic calculation of the unbalance rate.
2. Wide Application Range: With a maximum output current of 20A and a measurement range of 0–200Ω, combined with an integrated degaussing function, the dc resistance tester with demagnetization function supplier meets numerous on-site and off-site test requirements for virtually all transformer types.
3. Intelligent Stability Judgment: During testing, the resistance change rate within 5s, 15s, and 30s is automatically calculated, assisting operators in judging data stability and preventing misreading.
4. Comprehensive Protection: Features multiple protections against back electromotive force, disconnection, and power failure, ensuring safe and reliable operation.
5. Data Storage and Printing: Equipped with a thermal printer, supports local storage of up to 200 test data items, and enables mass data storage via USB disk.
6. User-Friendly Interface: Provides a comfortable and convenient user experience with a fresh and simple 7-inch industrial true-color screen, supporting full-touch operation for intuitive control.
기술적인 매개변수
Technical Indicators | |
출력 전류 | Single Phase: 20A, 10A, 5A, 1A, 0.1A |
측정 범위 | Single Phase: Gear 20A 0.5mΩ~ 1 Ω Gear 10A 1.0mΩ~ 2 Ω Gear 5 A 10 mΩ~ 4 Ω Gear 1 A 0.1Ω~ 20Ω Gear 0.1A 2.0Ω~ 200ΩThree Phase: Gear 10A + 10A 0.5mΩ ~ 0.8 Ω Gear 5 A + 5 A 10 mΩ ~ 1.6 Ω Gear 1 A + 1 A 0.1 Ω ~ 8.0 Ω Gear 0.1A+0.1A 2.0 Ω ~ 80 Ω |
정확성 | ±(Accuracy×0.2%+2) |
전원공급장치 | AC220V±10%, 50/60Hz |
온도 | -10ºC~50ºC |
상대습도 | <90%, non-condensing |
치수 | 400mm×315mm×223mm |
무게 | 9 kg |
1. For testing winding of no-load regulating transformers, don't switch off no-load tap changer during tests or power discharging.
2. Don't disconnect test wires and cut off power switch during tests or power discharging.
3. During transformer tests, winding of the non-test side must be in open circuit.
Application Scenarios
1. Power Utilities and Substations: Used for delivery, installation, handover, and preventive testing of power transformers to detect manufacturing defects such as coil material issues, welding problems, loose connections, and broken strands.
2. Transformer Manufacturing: Employed by manufacturers for factory acceptance testing and quality control to verify winding resistance and ensure product quality before shipment.
3. Industrial and Mining Enterprises: Used for maintenance and testing of transformers in industrial facilities with high-voltage power systems.
4. Testing Laboratories: Suitable for use in high-voltage testing laboratories for conducting DC resistance tests on various transformer types.
5. Maintenance and Repair Facilities: Used during transformer maintenance and repair to verify the integrity of windings and connections after service work.
FAQ about Transformer DC Winding Resistance Tester
1. What is the purpose of the DC Resistance Tester?
It is used to measure the DC resistance of transformer windings, which is a critical test for detecting manufacturing defects such as poor welding, loose connections, broken strands, and shorted turns. It is also used to verify winding integrity after installation, during handover, and as part of preventive maintenance.
2. What is the advantage of the demagnetization function?
The demagnetization function removes residual magnetism from the transformer core after DC resistance testing. Residual magnetism can affect subsequent tests and cause issues during operation. Having this function integrated eliminates the need for a separate demagnetization device, simplifying the testing process.
3. How does the instrument help ensure data stability?
During testing, the dc resistance tester with demagnetization function manufacturer automatically calculates the resistance change rate within 5s, 15s, and 30s. This assists operators in judging data stability and prevents misreading of results.
4. What safety features are included?
그만큼dc resistance tester with demagnetization function factory includes numerous protections against back electromotive force, disconnection, and power failure. It also has automatic current selection and comprehensive protection circuits for highly reliable operation.
5. What are the available current outputs and measurement ranges?
Single-phase outputs include 20A, 10A, 5A, 1A, and 0.1A, with measurement ranges from 0.5mΩ to 200Ω. Three-phase outputs include 10A+10A, 5A+5A, 1A+1A, and 0.1A+0.1A, with corresponding measurement ranges.
After-sales service
1. Warranty card is included in the delivery of this product, so during delivery, please check the product carefully on the spot. If defects are found, please fill in the warranty card carefully.
2. Buyers enjoy lifelong maintenance from the date of purchase. They can show its warranty card for free repairing if problems happen within warranty period, otherwise, they have to pay for repairing and commissioning.
3. The following conditions are not in warranty:
Products are disassembled or their structure is changed by users deliberately.
Products are seriously damaged due to users' improper storage or use.
Products are damaged for other reasons on user side.
The UHV-S10A Three-Circuit Transformer DC Resistance Tester is a high-performance testing instrument manufactured and supplied by Wuhan UHV Power Technology Co., Ltd. It is specially designed for accurate and efficient DC resistance measurement of transformer windings, featuring three-circuit simultaneous testing to significantly reduce testing time and improve field testing efficiency. The tester offers high measurement accuracy, multiple test current options, a resolution of up to 0.1 μΩ, and a user-friendly LCD interface with data storage and printing functions. The UHV-S10A provides a reliable and efficient solution for transformer testing and maintenance, with a competitive price and flexible supply options to meet the requirements of different customers and applications.
