Product parameters:
Transformer winding deformation tester (low voltage impedance method) is an intelligent instrument specifically designed for measuring the impedance characteristics of large and medium-sized transformers. The testing instrument adopts high-precision synchronous AC sampling and FFT digital signal processing techniques for voltage and current, ensuring accurate and stable measurement data. The instrument adopts three-phase automatic measurement or single-phase measurement methods, reliably short circuiting the low-voltage side. After inputting transformer parameters, the instrument can automatically test and calculate the impedance and impedance error percentage of each phase. Displaying voltage and current waveforms during the testing process is more suitable for on-site use.
Technical parameters:
Measuring speed | Single-phase winding 1 min -2 min |
Output voltage | Vpp-20v, automatically adjusted during testing |
Output impedance | 50Ω |
Input impedance | 1MΩ (response channel built-in 50Ω matching resistance) |
Sweep range | 100 hz - 2 MHZ |
Frequency accuracy | 0.005% |
Sampling frequency | 100MSPS |
Sweep mode | Linear or logarithmic, sweep frequency and points can be set arbitrarily |
Curve display | Amplitude-frequency curve |
Wide measurement dynamic range | -120dB to 20dB |
Impedance method to measure voltage | 0 ~ 220V |
Impedance method measures current | 0 to 10A |
Impedance frequency | 50Hz/60Hz |
Feature:
1. The frequency response method uses the sweep frequency method to measure the characteristics of transformer windings. Without lifting or disassembling the transformer cover, by detecting the amplitude frequency response characteristics of each winding, the distortion, bulging, or displacement of the winding can be accurately measured for transformers of 66kV and above.
2. The frequency response method has a fast measurement speed and takes 1-2 minutes to measure a single winding.
3. The frequency response method has a very high frequency accuracy, with a frequency accuracy of 0.005%.
4. The instrument adopts 5000V voltage isolation to fully protect the safety of the testing computer.
5. The instrument has an oscilloscope function, which facilitates real-time monitoring of testing conditions.
6. The frequency response method can simultaneously load 9 curves, automatically calculate the relevant parameters of each curve, diagnose the deformation of the winding, and provide diagnostic reference conclusions.
7. The frequency response method uses powerful analysis software, and the software and hardware indicators meet the power industry standard DL/T911-2016 and the international electrical standard IEC60076-18.
8. The short-circuit impedance method does not require an external voltage regulator, and can automatically apply voltage to the AB, BC, and CA high-voltage windings of the transformer, synchronously collect data, and automatically calculate the impedance error percentage. The test results are very intuitive.
9. The short-circuit impedance method is suitable for impedance testing of transformers of any size and capacity.
10. During the short-circuit impedance method testing process, the waveform diagram of the test current and voltage is displayed, which facilitates real-time monitoring of the testing situation.
11. The instrument has the function of measuring inductance.
12. Adopting the Windows platform, compatible with Windows 2000/Windows XP/Windows 7/Windows 8/Windows 10 and Windows 11.
13. Using a database to store test data, the management of test data is simple and convenient.
14. The software management function is powerful, fully considering the needs of on-site use. Automatically save and export measurement data to generate Word version test reports (with corresponding Office software installed) or JPG image reports, making it convenient for users to generate test reports.
15. The software has a high degree of intelligence, and after the input and output signals are connected, all measurement work can be completed with just one key press.
16. The software interface is simple and intuitive. The analysis, storage, report export, printing and other menus will only automatically pop up the next required menu after completing the current step, which is more convenient.
