During normal operation and testing, residual magnetism will be generated in the iron core of a large capacity transformer. When the capacity of the transformer is large, the harm of residual magnetism will also increase accordingly. Residual magnetism may cause misoperation of relay protection devices, resulting in the failure of transformer operation; At the same time, residual magnetism may also cause abnormal test results and affect the quality of electricity after transmission. Therefore, when abnormal phenomena or faults occur due to residual magnetism during the operation of transformers, they should be taken seriously. For this purpose, our company has developed a series of transformer demagnetization products. Our company is one of the earliest manufacturers in China to develop and produce demagnetization instruments, and has accumulated a wealth of practical experience.

The demagnetization instrument for power transformers is a new generation demagnetization instrument independently developed by our company. By adopting a reasonable composite current method technology, it is possible to quickly demagnetize power transformers and mutual inductors. For three-phase transformers, demagnetizing only one phase is sufficient, which is more time-saving and efficient.

1. The composite current demagnetization method used in the instrument results in minimal current impact during the demagnetization process.

2. The demagnetization efficiency is high, and only one phase of the three-phase transformer can be demagnetized, saving a lot of time.

3. The progress percentage and demagnetization progress indicator bar of the demagnetization process are intuitive and clear, and the demagnetization current curve graph is displayed.
4. The wiring is simple and can be directly demagnetized using the test line of the DC resistor.

5. Adopting digital current adjustment, the control accuracy of current is high.

6. Adopting a 5-inch color touch screen control makes it easier to operate.

7. The test results are automatically stored, recording demagnetization current data without the need for manual storage.

8. The report can be printed directly and stored on a USB drive.

9. High degree of intelligence, after setting the parameters, most measurement tasks can be completed with just one key press.

10. The software interface is simple and intuitive, with clear menus for storage, report export, printing, and more.

Main technical indicators
Input type: Current method
Output voltage: Vpp-40V, automatically adjusted during testing
Output current: 5A, 4A, 3A, 2A, 1A, selectable
Demagnetization progress: 0-100%
Minimum resolution: 0.1%
Supply voltage: AC100V-240V ± 10%
Frequency: 50Hz/60Hz
Working environment: -10 ℃~50 ℃ ≤ 85% RH
 
Main features of testing software
Adopting an embedded system, there is no risk of software poisoning.
Using directory based storage to save test data, the management of test data is simple and convenient.
The testing system can directly print data.
Support USB data export function.
The software has a high degree of intelligence, and after connecting the input and output signals, most measurement tasks can be completed with just one key press.
The software interface is simple, intuitive, and practical.