After DC resistance test and other DC tests, large power transformers and transformers will generate a large amount of residual magnetism, which will have a significant impact on the normal operation of transformers and transformers
1. Causing the relay protection device of the transformer to malfunction, resulting in the failure of the transformer's operation;
2. The excitation inrush current generated by residual magnetism can cause damage to transformers due to excessive electrical force
3. The excitation inrush current generated by residual magnetization can cause the magnetic circuit of the transformer to be excessively magnetized, significantly reducing measurement accuracy and the operation of the relay protection device
4. The large number of harmonics in the excitation inrush current generated by remanence cause serious pollution to the power quality of the power grid;

1. The instrument adopts a high-tech composite AC/DC frequency conversion attenuation principle;
2. The instrument can measure and display the residual magnetization curve before and after demagnetization.
3. Flexible testing wiring can achieve demagnetization by demagnetizing only one phase;
4. One click testing, which can choose from: one click standard demagnetization or one click fast demagnetization;
5. Rapid demagnetization: demagnetization has been reduced from the traditional 30 minutes to a minimum of 2 minutes;
6. Significant demagnetization effect - increased from 80% to over 90% in a single use;
7. Four wire wiring, which can directly use the current wire for DC resistance testing, making it convenient to match with DC resistance testing;
8. Adopting a 5-inch color LCD display screen for clear and intuitive display;
9. The operation adopts a resistive touch screen, which is small in size, light in weight, and suitable for on-site operation
10. The test results can be saved, with 99 sets saved, and the results can be retrieved and queried. Equipped with a high-speed printer, the test results can be printed out.
11. Suitable for eliminating residual magnetism before power transformers and mutual inductors are put into operation; Especially for large capacity transformers with voltage levels of 110kV and above;

1. Demagnetization current: 1ma~10A can be set;
2. Demagnetization mode: standard demagnetization, rapid demagnetization;
3. Demagnetization time: Fast mode: about 2 minutes/time (regardless of voltage level and capacity)
4. Standard mode: Approximately 5 minutes per session (regardless of voltage level and capacity)
5. Demagnetization effect: standard - greater than 90%/single quick - greater than 80%/single time
6. Demagnetization progress: 0-100% automatic recording of demagnetization data
7. Working power supply: AC 220V ± 10%, machine size: 37 X 26 X 28 centimeters
8. Environmental temperature: -25 ℃~50 ℃, weight: 10kg (excluding testing line)