Transformer Turn Ratio Tester
Product Introduction
The three-phase transformer turns ratio tester is an intelligent testing device specifically designed for three-phase transformers in power systems. It is mainly used for measuring transformer turns ratio, ratio error, and connection group, and is particularly suitable for Z-connected transformers and transformers with high zero-sequence no-load current.
그만큼three-phase turns ratio tester manufacturer adopts automated testing technology. After wiring is completed, three-phase ratio testing can be quickly performed, with automatic polarity determination and tap position calculation. Test results can be stored, queried, and printed by the device, and also support USB export and PC software management, meeting various application needs such as substations, transformer manufacturing enterprises, power maintenance, and preventive testing.
기술적인 매개변수
| 변환 비율 테스트 범위 | 0.8～10000 |
| 그룹 테스트 범위 | 0～11 |
| Ransformation ratio testing accuracy | class 0.1 (HV:0.8～200) |
| class 0.2 (HV:200～1000) | |
| class 0.5 (HV:1000～10000) | |
| class 0.2 (LV:0.8～100) | |
| 변환 비율 분해능 | 0.0001 |
| 전원 입력 | 220V±10%, 50HZ±1Hz |
| 서비스 온도 | -20℃~40℃ |
| 상대습도 | ≤85%, 응축 없음 |
| 호스트 시스템의 전체 크기 | 325mm×280mm×190mm |
| 호스트 시스템의 무게 | 6.9kg |
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Product Characteristics
2、Offers two output voltage options, ideal for transformers with high zero-sequence current.
3、Wide measurement range with a maximum transformation ratio of up to 10,000.
4、Automatic tap position calculation.
5、Fast operation: completes three-phase measurement in just 18 seconds.
7、Can automatically store up to 99 sets of test data.
8、Flexible data handling: supports retrieval, printing, export to USB drive, deletion, and upload to PC.
9、Includes transformer short-circuit protection and inter-turn short-circuit protection; fault information is displayed on the LCD screen in case of a short circuit.
10、Compatible with PC software for full-process testing control and data management.
11、Comes with a detailed operation manual for user convenience.
12、Compact design, slightly larger than an A4 sheet of paper.
13、Lightweight, weighing only 6.9 kg.
Product functions
Rapid three-phase ratio testing
Supports three-phase turns ratio, ratio error, and connection group testing, quickly completing transformer parameter inspection.
Fully automatic tap position testing
Automatically identifies and tests each tap position of the transformer, reducing manual operations and improving on-site testing efficiency.
Suitable for multiple transformer types
Supports testing of conventional transformers and Z-connected transformers, adapting to different transformer structures and wiring configurations.
Intelligent polarity and connection group determination
Automatically determines transformer polarity and connection group, quickly assisting in verifying whether winding connections are correct.
Comprehensive data management functions
Supports automatic storage, query, export, and printing of test data, facilitating test record management and equipment file establishment.
Multiple safety protection design
Features protection functions against abnormalities such as short circuits and inter-turn short circuits, with real-time fault indication, ensuring safe and reliable testing.
Product Advantages
High Accuracy and Reliability: The three-phase turn ratio tester supplier provides measurement accuracy of Class 0.1 for ratios up to 200 and Class 0.2 for ratios up to 1000, ensuring reliable test results for even the most critical transformers. Results are stable and repeatable, unaffected by fluctuations in the power supply frequency or amplitude.
Excellent Portability: Weighing only 6.9 kg and with dimensions slightly larger than an A4 sheet of paper, the instrument is highly portable and convenient for on-site field testing.
Ease of Use: The turn ratio tester is designed for simple connection and operation, with a user-friendly interface and a detailed manual. The clear LCD display provides a straightforward readout of results and fault information.
Versatility: It supports a wide range of transformer types (including Z-type and rectifier transformers) and applications, from factory acceptance to field maintenance, making it a valuable tool for any power professional.
Fast Testing: The 8-second data display and 18-second three-phase measurement cycle significantly improve testing efficiency, especially for transformers with multiple tap positions.
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Application Fields
Transformer Manufacturing: Used by manufacturers for final quality control to verify that the turns ratio and vector group of new transformers meet design specifications.
Substation Commissioning: Essential for testing and verifying transformer connections and ratio accuracy during the commissioning of new substations or after major installation work.
Routine Maintenance and Preventive Testing: Used by utilities and industrial facilities for periodic testing to detect early signs of winding deformation, tap changer issues, or inter-turn short circuits, helping to prevent unexpected failures.
Fault Diagnosis: Deployed when a transformer is suspected of having a winding fault. A turn ratio test is a key diagnostic method to confirm issues like shorted turns or open circuits.
Z-Type and Rectifier Transformer Testing: Specifically suitable for Z-type transformers used for grounding applications or rectifier circuits, and for rectifying transformers in railway electrical systems.
FAQ
Q: What is a transformer turns ratio test and why is it important?
A: turns ratio test verifies the ratio of the number of turns in the high-voltage winding to the number of turns in the low-voltage winding. This ratio is directly proportional to the transformer's voltage ratio. Measuring it is crucial because deviations from the specified value can indicate serious problems such as shorted turns, incorrect tap changer connections, or winding deformations that could lead to transformer failure.
Q: What issues should be paid attention to when measuring the transformer turns ratio?
A: Attention should be paid to temperature, wiring methods, stability of the test power supply, and standardized operation by personnel.
Q: How is data managed and exported?
A: The three-phase turn ratio tester factory automatically saves up to 99 data sets. You can view, print, or delete data directly on the device. Data can also be exported to a USB drive or uploaded to a PC. A dedicated PC software allows for full-process test control and comprehensive data management.
Q: What impact will an inaccurate transformer turns ratio have on the power grid?
A: An inaccurate turns ratio may reduce power transmission efficiency and may even cause serious problems such as equipment overload and damage.
Q: How can the accuracy of transformer turns ratio measurement be improved?
A: Choose a high‑precision automatic tester, strictly follow the operating procedures during measurement, and pay attention to control of environmental factors.
The Three Phase Transformer Turns Ratio Tester is a reliable, accurate, and easy-to-operate solution for transformer testing and maintenance. With its wide measurement range, high testing accuracy, fast three-phase measurement, automatic data processing, and compact design, it can effectively meet the testing requirements of power systems, transformer manufacturers, substations, and other industrial applications. As an experienced supplier and professional manufacturer of high-voltage testing equipment, Wuhan UHV Power Technology Co., Ltd. is committed to providing high-quality products and technical support. For the latest product configuration and price, customers are welcome to contact us for a competitive price and customized solution.
