 The transformer Material (Characteristics) Analyzer is a novel instrument developed and designed by our company's R&D team specifically to address issues such as unscrupulous power users evading basic electricity fees or unauthorized capacity expansion, as well as unethical manufacturers substituting aluminum for copper in transformer production. It is a high-precision instrument dedicated to the measurement of transformer capacity, characteristic parameters, and the material composition of dry-type transformers.

 With the advancement of science and technology, material properties have undergone significant changes. Consequently, some transformer suppliers have attempted to pass off aluminum-wound transformers as copper-wound ones, causing substantial financial losses to purchasing entities. This issue has long plagued power supply bureaus; acting upon their invitation and guidance, our company has developed and manufactured this Material Analyzer—based on the distinct electrical characteristics of copper and aluminum—specifically designed to test and identify the material composition of transformers.

 This product features a 7-inch, full-color, high-resolution LCD touchscreen display with a Chinese-language interface. It offers simple, fast, and menu-driven operation, ensuring a user-friendly human-machine interface. The instrument is equipped with a high-performance internal rechargeable battery, allowing it to operate without the need for an external power supply. A single full charge enables continuous measurement of over 100 transformers. Furthermore, the instrument provides an internal, high-precision, three-phase 50Hz sinusoidal AC test power source; this eliminates the need for external three-phase power supplies, voltage regulators, current boosters, or other auxiliary equipment when measuring transformer capacity and short-circuit (load) losses, thereby significantly enhancing operational efficiency.

 This instrument serves as a multi-functional measurement device, effectively consolidating the capabilities of three traditional instruments: an Active Transformer Capacity Tester, a Transformer Characteristic Parameter Tester, and a Transformer Winding Material Analyzer. It is capable of performing precise measurements of a comprehensive range of power-frequency parameters—including capacity, type, no-load current, no-load loss, short-circuit (load) loss, and impedance voltage—across various types of transformers.

Key Features

 1. Employs an ARM + FPGA + ADC architecture, coupled with the RT-Thread real-time operating system, resulting in a more robust system and significantly higher measurement accuracy.

 2. Features a 7-inch, high-brightness color LCD touchscreen display with a Win8-style user interface, supporting Chinese character input and offering a fully Chinese-language menu system.

 3. Includes a comprehensive built-in electronic help system; every operational step is accompanied by corresponding wiring diagrams and textual descriptions, ensuring intuitive and straightforward operation. 4. Features built-in large-capacity storage and USB communication capabilities; all on-site test data can be saved and, upon customer request, uploaded to a PC.

5. Includes a remote program upgrade function, allowing the instrument's firmware to be updated remotely in accordance with customer requirements.

6. Real-time status monitoring of voltage and current channels is available across all testing interfaces.

7. Provides harmonic analysis for voltage and current channels during various transformer characteristic tests, with results displayed visually using bar charts.

8. A single interface simultaneously displays real-time test circuit parameters—including voltage, current, frequency, power factor, active power, reactive power, and apparent power—and generates vector diagrams to facilitate the verification of on-site wiring connections.

9. Comes standard with specialized low-voltage short-circuit cables designed for field use; these cables securely connect to the terminals of the transformer under test without the need for screws or wrenches, thereby streamlining on-site testing procedures.

10. Capable of measuring the capacity of various distribution and power transformers directly on-site without the need for an external power supply, making the testing process more convenient and efficient.

11. When combined with an external power source and auxiliary equipment (such as voltage regulators, step-up transformers, or current boosters), the instrument can measure a comprehensive range of transformer characteristics, including no-load current, no-load loss, impedance voltage, and load loss.

12. All test results undergo automatic correction. Users simply input relevant parameters (e.g., temperature, no-load correction coefficients, etc.), and the instrument automatically applies various corrections—such as waveform distortion correction, temperature correction, and corrections for non-rated voltage/current conditions—to ensure a higher level of accuracy in the test results.

13. During transformer characteristic measurements, the instrument offers a maximum voltage range of up to 750V and a maximum current range of up to 100A, and is equipped with internal protection circuitry to ensure safe operation. During measurement, there is no need to switch ranges; this not only ensures measurement accuracy but also eliminates the risk of damaging the instrument due to an incorrect range selection.

14. When testing transformer characteristics, both the voltage and current measurement ranges can be expanded with great flexibility and ease simply by connecting external voltage transformers (VTs) and current transformers (CTs), thereby significantly extending the instrument's testing scope.

15. Based on the no-load and load loss results obtained from the tests, the instrument can automatically assess the performance level of three-phase oil-immersed distribution transformers and power transformers, providing immediate reference information for on-site personnel.

16. The DC resistance test function offers a selection of six output current levels, with a maximum output capability of 10A.

17. Parameter configuration capabilities have been significantly enhanced, allowing users to specify details such as the transformer's test winding, tap position, test phase, specimen temperature, and temperature correction values.

18. Features an audible discharge alarm to help prevent operational errors.

Technical Specifications

1. Built-in Power Supply Output Range

Voltage: 0–10V

Current: 0–10A

2. Characteristic Channel Test Ranges and Accuracy

Voltage Range: AC 750V. Accuracy: ±0.2% (F.S.) ±1 digit

Current Range: AC 100A. Accuracy: ±0.2% (F.S.) ±1 digit

3. DC Resistance Measurement Range

0.001Ω – 0.1Ω (10A)

0.03Ω – 1Ω (5A)

0.06Ω – 5Ω (1A)

0.1Ω – 50Ω (200mA)

0.3Ω – 200Ω (40mA)

100Ω – 100kΩ (<5mA)

4. DC Resistance Measurement Accuracy

0.2% ±2μΩ

5. Resolution

0.1μΩ

6. Measurement Accuracy for Power and Other Parameters

Power: ±0.5% (F.S.) (CosΦ > 0.1)

±1.0% (F.S.) (0.02 < CosΦ < 0.1)

No-load (Load) Loss Measurement: ±2% (0.1 ≤ CosΦ ≤ 1)

7. Transformer Capacity Measurement Range

6.3 – 125,000 kVA

8. Operating Temperature

-20°C – +60°C

9. Charger Power Supply Requirements

Mains Power: AC 160V – 265V