Product Introduction
The UHV-332 transformer turns ratio tester is a professional testing device designed for transformer production, installation, maintenance, and on-site testing. It can quickly and accurately measure key parameters such as transformer turns ratio, phase angle, ratio error, tap position, and tap value.
The device uses digital synthesis of three-phase standard sine wave signal sources and high-fidelity power amplification technology, providing a stable test signal even in on-site environments with complex power quality. The instrument supports both single-phase and three-phase testing, and features automatic connection group identification, tap testing, blind testing, vector diagram display, and data storage, meeting the on-site testing requirements of different types of transformers.
제품 매개변수
| Ratio measurement range | 0.8～10000 |
| High measurement speed | three-phase test can be completed within 40 seconds. |
| Voltage measurement accuracy on HV side | 0.05% |
| Voltage measurement accuracy on LV side | 0.1% |
| Phase angle measurement accuracy | 0.1° |
| TTR measurement accuracy | 0.1%（0.9－200） |
| 0.2%（200－2000） | |
| 0.3% (2000－10000） | |
| 치수 | 320*240*130mm3 |
| 무게 | 3kg |
 |  |
Product features
1. True three-phase testing: single-phase power input, internal digital synthesis of three-phase standard sine wave signal source, through high fidelity power amplifier, generates three-phase test power output (distortion less than 0.1%, symmetry better than 0.05%), the test results have better equivalence, and there will be no group misjudgment or other phenomena.
2. Powerful function: transformer turn ratio tester supplier can perform single-phase measurement and automatic testing of three-phase windings. Both single-phase and three-phase can measure polarity and phase angle. It can complete the measurement of AB, BC, CA three-phase transformation value, phase angle value, error, tap position, tap value and other parameters in one go, and can automatically identify the group number (0-11 is equivalent to 1-12).
3. Phase angle measurement function: Accurately measure the phase angle (0-360 °) between the high and low voltage sides, and turn ratio tester factory can measure the transformation ratio and angle of non integer point transformers.
4. Hexagonal diagram display function: The test results are displayed in numerical and hexagonal vector diagrams, which intuitively show the connection group of the transformer.
5. Blind testing function: No need to select the wiring method or wiring group, measuring Y/△ and △/Y transformers does not require external short circuiting, and the wiring method can be automatically switched according to the selected testing content. It is entirely possible to measure the transformation ratio and group number of transformers without nameplates.
6. Tap test: turn ratio tester supplier can quickly measure the transformation ratio and transformation ratio error at each tap switch position. The rated transformation ratio only needs to be input once, and the transformation ratio error at each tap position can be calculated without repeated input.
7. At the same time, it has two functions: measuring the turns ratio and measuring the operating voltage transformation ratio. The operating transformation ratio can more accurately reflect the actual value of the voltage transformation ratio of the transformer in actual operation.
8. It has a specialized testing function for low input voltage transformers. For transformers with very low primary voltage, a special voltage is used for testing to avoid situations where the excitation current is too large to test.
9. Good anti vibration performance: The use of military connectors enhances the anti vibration performance.
10. Good anti vibration performance: The use of military connectors enhances the anti vibration performance.
11. Adopting a 7-inch high-definition true color LCD screen, the display of data and vector graphics is intuitive and delicate.
12. The instrument comes with a thermal sensitive high-speed micro printer, which can print and retain the test results at any time.
13. The instrument has a USB interface and can support USB drives to copy stored data files to a computer. (The data file is in text format and does not require specialized software to open)
14. The test source used in this instrument is a standard sine digital source synthesized digitally, with a distortion of less than 0.1%, and is not affected by the quality of the working power supply.
15. Convenient to carry: small size and light weight.
16. Equipped with high-capacity lithium-ion rechargeable batteries internally, the testing work can be completed on site without any power supply. With one full charge, it can perform more than 500 consecutive measurements.
Factors Affecting the Accuracy of Transformer Turns Ratio Testing
Wiring error: If the wiring is not standardized, transformer turn ratio tester can easily lead to reading deviation.
External interference: Electromagnetic interference on site may affect the accuracy of the test signal.
The accuracy of the equipment itself: The accuracy of the testing instrument directly determines the reliability of the results.
Transformer temperature: Temperature changes can sometimes have a small impact on the winding parameters of transformers.
 |  |
Frequently Asked Questions (FAQ)
Q1: Why is a turns ratio test necessary for transformers?
A1: The turns ratio is a fundamental parameter of a transformer. Testing it can determine whether the transformer windings are correctly connected and whether faults such as inter‑turn short circuits exist.
Q2: How can electromagnetic interference be avoided during on‑site testing?
A2: It is advisable to perform the test on the low‑voltage side of the transformer whenever possible, use well‑shielded test cables, and ensure that the testing instrument itself has adequate anti‑interference capability.
Q3: What are the advantages of the turns ratio testers manufactured by Wuhan UHV Power Technology Co., Ltd.?
A3: The equipment from Wuhan UHV Power Technology Co., Ltd. is renowned for its high accuracy, full automation, ease of operation, powerful data management functions, and comprehensive after‑sales service.
Q4: Besides the turns ratio test, what other important transformer tests are there?
A4: Common additional tests include insulation resistance testing, dielectric loss testing, winding resistance testing, and no‑load/load tests.
ㅏs a direct manufacturer and supplier, we can offer competitive factory prices and flexible solutions for distributors, engineering companies, power utilities and OEM customers. Whether you need a single testing instrument or bulk orders for your business, our sales and technical teams can provide professional product selection, technical support and after-sales service. Choose UHV Power as your trusted manufacturer and supplier of transformer testing equipment — professional quality, competitive price and reliable service.
