Transformer winding deformation tester is to quantify the response change of the internal winding parameters of the transformer in different frequency domains, and determine the degree of change of the internal winding of the transformer according to the size of the change value, the amplitude of the frequency response change, the region and the trend of the frequency response change, and then determine whether the transformer has been seriously damaged and whether it needs to be overrepaired according to the measurement results.

For the transformer in operation, the fault degree can also be judged by comparing the difference of the characteristic maps between the coils of the faulty transformer, regardless of whether the characteristic maps in the frequency domain have been saved in the past. Of course, if you save a set of the original winding characteristics of the transformer, it is easier to provide a strong basis for the operation of the transformer, post-accident analysis and maintenance.

The single-machine transformer winding deformation tester designed and produced by our company is based on the "DLT911-2016 power transformer winding deformation frequency response analysis method", using frequency response method to measure and analyze transformer internal faults. Suitable for 66KV and above voltage grade power transformers, and other special purpose transformers.

The instrument adopts 32-bit ARM chip + DDS frequency synthesis chip, with 16-bit high-precision A/D chip and large-size touch screen LCD, which has the advantages of small size, light weight, high precision, fast speed and easy operation.

The device can run on a single machine or online with a PC.

Technical characteristics
1. Support both frequency method and impedance method.
2.32 bit ARM processor and DDS frequency synthesis technology.
3.16-bit high precision A/D sampling.
4.USB port for data transfer.
5.10.1 inch color LCD Chinese display, touch screen operation.
6. Single machine/online operation. Single machine operation mode, no computer control on site.
Online mode connects to a PC or laptop using a USB communication cable.
7. Built-in printer, on-site printing 2D graphics and test results.
8. Support horizontal and vertical data comparison, support 2D, 3D and logarithmic graphics display.
9. Built-in large capacity FLASH storage, a total of 200 groups of data can be stored, and at any time query or U disk transfer.
10. The client of the upper computer, to achieve database management, a variety of graphics mode, multiple curve comparison, graph scaling, pdf report and printing.
11. The instrument meets the technical conditions of the power standard "DL/T911-2004 Frequency Response Analysis Method of Power Transformer winding Deformation" and "DLT 1093-2018 Guide for the Detection and Judgment of Power Transformer Winding Deformation".

Detailed parameter
Frequency response method
1. Sweep frequency range: 1KHZ ~ 2000KHZ (2MHZ).
2. Sweep resolution: minimum 0.1khz.
3. Output signal amplitude: 20Vp-p
4. Output frequency accuracy: 0.001%
5. Frequency response range: -120 dB ~ +20 dB
6. Frequency response resolution: 0.1dB
7. Input impedance: 1MΩ
8. Output impedance: 50Ω
9. Measurement speed: about 50 seconds/phase (1MHZ)