Product Introduction
The UHV-S20A Three-circuit Transformer DC Resistance Tester is our latest-generation solution for measuring the DC resistance of transformer windings. It is optimized for large-capacity transformers and supports simultaneous measurement of three-phase windings.Transformer three-phase dc resistance tester around the group can be tested simultaneously. For transformer with load regulating voltage, discharge can be eliminated and straight pick up switch can be adopted. Measurement time is one third of that of traditional Single phasemeasurement standard, which can greatly reduce working time and labor intensity. The dc resistance meter adopts large screen liquid crystal display, with a clear and intuitive graphical interface in Chinese, and operation is very simple. Equipped with panel printer and large capacity non-volatile memory, measurement results can be easily stored and printed. Testdata is stable, fast and repeatable, making it a standard choice for dc resistance in scene measurement transformer.
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제품 특징
1. The three-phase dc resistance tester manufactures 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
Product functions
1. Three-Phase Simultaneous Testing: It can simultaneously test the DC resistance of Y-connected three-phase windings of a transformer, reducing measurement time to one-third of that required by traditional single-phase measurement methods.
2. Three-Phase Simultaneous Testing: It can simultaneously test the DC resistance of Y-connected three-phase windings of a transformer, reducing measurement time to one-third of that required by traditional single-phase measurement methods.
3. Wide Measurement Range: It offers single-phase current gears of 1A, 5A, 10A, 20A, and 40A with corresponding measurement ranges from 0.5Ω down to 1mΩ. Three-phase current gears include 1A, 5A, 10A, and 20A with measurement ranges from 6Ω down to 0.3Ω (per phase).
4. High Accuracy and Resolution: The measurement accuracy is ±0.2% (full range) ± 2 digits, with a maximum resolution of 0.1μΩ .
5. Tap Changer Testing: For transformers with load-regulating voltage, the tester allows direct tap changer operation without discharging, eliminating the need for repeated discharge and speeding up testing.
6. Data Management: It features a large-screen LCD with a clear Chinese menu interface, a panel printer, and a large-capacity non-volatile memory capable of storing 150 groups of measurement results.
7. Comprehensive Protection: It includes perfect protection functions to ensure safe and reliable operation.
기술적인 매개변수
| 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 | ||
| 정확성 | ±0.2%（full range） | / |
| Data Storage | 255 | |
| 표시하다 | LCD | Resistance display：4 1/2 bits |
| Maximum resolution | 0.1mΩ | / |
| 전원공급장치 | AC 220V±22V，50Hz±2 Hz | Fuse 5A |
| Maximum Power Dissipation | 300W | Test current：10A/hour |
| 업무 환경 | Temperature：0℃～40℃ | / |
| Relative Humidity：≤80%RH | ||
| 치수 | 200*400*280 (mm) | / |
| 무게 | 6kg | Including accessories |
Product Advantages
1. Significant Time Savings: Three-phase simultaneous testing reduces measurement time to one-third of traditional single-phase methods, greatly reducing work time and labor intensity.
2. Significant Time Savings: Three-phase simultaneous testing reduces measurement time to one-third of traditional single-phase methods, greatly reducing work time and labor intensity.
3. High Efficiency for Tap Changer Testing: The ability to perform tap changer tests without discharging speeds up the testing process for transformers with on-load tap changers.
4. High Accuracy and Stability: With ±0.2% accuracy and 0.1μΩ resolution, combined with good data repeatability and strong anti-interference ability, it provides reliable and precise results.
5. User-Friendly Design: The large-screen LCD with Chinese menu, simple and intuitive operation, and panel printer make the instrument easy to use in the field.
6. Compact and Portable: The instrument is compact and easy to carry, suitable for field testing.
7. Complete Protection: The built-in protection functions ensure safe operation.
Application Scenarios
1. Transformer Manufacturing: Used for factory acceptance testing to verify winding resistance and detect manufacturing defects such as poor welding, loose connections, or broken strands.
2. Substation Commissioning: Essential for testing and verifying transformer windings during the commissioning of new substations or after major installation work.
3. Routine Maintenance and Preventive Testing: Used by utilities for periodic testing to detect early signs of winding deformation, tap changer issues, or connection problems.
4. Fault Diagnosis: Deployed after a transformer experiences a short-circuit fault to assess winding condition and determine if the transformer can be safely returned to service.
5. On-Site Field Testing: The compact and portable design makes it suitable for field testing in substations and remote locations.
FAQ about Three-circuit Transformer DC Resistance Tester
Q:What is a three-circuit transformer DC resistance tester, and why is it needed?
A:three-circuit transformer dc resistance tester supplier is a specialized power testing device used to measure the DC resistance value of transformer windings. By applying a stable DC test current to the windings and measuring resistance variations, it can determine winding connection status, conductive circuit quality, and tap changer operating condition.
Compared with traditional single-circuit test equipment, the three-circuit tester can measure all three-phase winding resistances simultaneously, reducing the number of on-site reconnections and waiting time. It is particularly suitable for rapid testing of large power transformers, main transformers, and complex power equipment.
Q:What is the difference between a three-circuit transformer DC resistance tester and a standard single-circuit tester?
A: The three-circuit transformer dc resistance tester factory uses a multi-channel synchronous measurement method, enabling simultaneous data acquisition from all three-phase windings, whereas standard single-circuit equipment typically requires phase-by-phase testing.
The main differences include:
Different testing efficiency: The three-circuit device completes three-phase measurement with a single connection, significantly reducing test time.
Higher data consistency: Simultaneous testing minimizes the impact of different times and environmental factors on measurement results.
Broader application range: More suitable for large transformers, on-site maintenance, and batch testing tasks.
Simplified operation process: Reduces manual reconnection and improves on-site testing safety.
Q: Why is the three-circuit transformer DC resistance tester suitable for testing large power transformers?
A: The winding resistance of large power transformers is typically low, while the inductance is large, requiring a longer stabilization time with traditional test equipment. The three-circuit transformer DC resistance tester features strong output capability and synchronous measurement technology, enabling rapid establishment of stable test conditions and improving testing efficiency for large-capacity transformers.
Its advantages include:
Suitable for testing transformers of high capacity and high voltage levels;
Shortens winding stabilization time;
Reduces on-site outage testing time;
Improves maintenance efficiency and safety.
Looking for a trusted UHV-S20A Three-circuit Transformer DC Resistance Tester manufacturer and supplier? We specialize in high-quality transformer testing equipment designed for accurate, efficient, and reliable field testing. As an experienced manufacturer and supplier, we offer competitive UHV-S20A price, professional technical support, and flexible delivery options. Contact us today to request the latest price, specifications, product details, and a customized quotation for your transformer testing requirements.
