Penguji TTR Rasio Putaran Transformator UHV-332

Product Introduction

The Multifunction 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.

Ituturns ratio tester manufacturer 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 transformer turns ratio tester 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.

Parameter Produk

Product functions

1. Turns Ratio Measurement: It accurately measures the turns ratio with a range of 0.8 to 10,000. It applies an AC test voltage to the high-voltage winding and measures the resulting voltage from the low-voltage winding.

2. Excitation Current Measurement: It measures the current required to magnetize the transformer core, helping detect core damage, inter-laminar short circuits, or other magnetic circuit issues.

3. Polarity and Phase Angle Check: It verifies winding polarity and measures the phase angle between high and low voltage sides with an accuracy of 0.1° . It can measure the turn ratio and angle of "non-integral point" transformers.

4. Three-Phase and Single-Phase Testing: It supports both single-phase and three-phase transformers, automatically identifying the connection group (e.g., Y/y, Y/△, △/y) without manual intervention. Three-phase turn ratio value, phase angle value, error, tapping position, and tapping value can be measured in one test.

5. Tap Changer Testing: It can step through each tap position and measure the turns ratio at every stage. The user only needs to input the rated TTR once, and the TTR error at each tapping position is automatically calculated.

6. Blind Test Function: There is no need to choose the connecting method and group. When measuring Y/△ or △/Y transformers, no external short-circuit is needed, and the connecting method is shifted automatically according to the selected testing contents.

7. Comprehensive Display: It features a 5.6-inch LCD with a full English graphical operation interface, English character prompts, and multi-parameter display. Test results can be displayed as digits and hexagonal vector diagrams, making the transformer connection group clear.

8. Data Management: It has built-in large-capacity power-loss-free data storage, expandable to 1000 groups of on-site verification results. Background PC management software is provided for data transfer via USB, report generation, and printing.

9. Portable and Battery-Powered: It weighs only 3kg and has a built-in high-capacity rechargeable lithium battery, allowing more than 500 continuous measurements on a full charge without AC power.

Product Advantages

1. Comprehensive Functionality: It performs ratio, excitation current, polarity, phase angle, vector group, and tap changer testing in a single unit, eliminating the need for multiple instruments.

2. Blind Test Capability: The ability to accurately measure ratio and group number without knowing any nameplate parameters makes it exceptionally versatile and user-friendly.

3. Wide Transformer Compatibility: It adapts to various transformer types including Z-type, rectifying, electric furnace, non-hour shift phase change, traction, Scott, and reverse Scott transformers.

4. High Accuracy: Voltage measurement accuracy is 0.05% on the HV side and 0.1% on the LV side, with phase angle accuracy of 0.1° and TTR accuracy of 0.1% (0.9-200).

5. Fast Testing: A three-phase test can be completed within 40 seconds, with a single data set displayed in about 8 seconds.

6. Excellent Portability: Weighing only 3kg with a built-in battery, it is highly portable and suitable for field use in remote locations without AC power.

7. User-Friendly Interface: The large true-color LCD with full English graphical interface, touch keyboard, and vector diagram display provides a friendly human-machine dialogue and reliable circuit verification.

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 turn ratio tester comes with a thermal sensitive high-speed micro printer, which can print and retain the test results at any time.

13. The turn ratio tester 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.

1. Transformer Manufacturing: Used for factory acceptance testing to verify turns ratio, polarity, and phase displacement meet design specifications before shipment.

2. Utility Commissioning and Installation: Confirms correct winding connections and transformer readiness for energization after installation at substations or project sites.

3. Routine Maintenance Programs: Performs ratio tests and compares current readings with historical baseline data to detect gradual changes in winding condition, allowing proactive maintenance.

4. Fault Diagnosis and Troubleshooting: Helps identify root causes of abnormal performance, such as shorted turns, open windings, incorrect tap changer positioning, or internal connection errors.

5. Instrument Transformer Testing: Verifies turns ratio and no-load accuracy of CTs and PTs to identify faulty units in metering and protection circuits.

6. Field Testing at Remote Sites: Battery-powered operation and rugged design make it suitable for field testing in remote areas, industrial plants, and mining sites.

7. Testing of Special Transformers: Capable of testing rectifier transformers, furnace transformers, traction transformers, and other special-purpose types.

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: Can it test both single-phase and three-phase transformers?

A2: Yes, it supports both single-phase and three-phase transformers, including auto-transformers, distribution transformers, power transformers, and instrument voltage transformers.

Q3: How does the tester perform tap changer testing?

A3: The turn ratio tester connects to the tap changer control leads or uses an optional interface box. It then automatically runs through all tap positions, records ratio and excitation current at each step, and flags any irregular readings that indicate contact wear or mechanical issues.

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.

As 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.