After DC resistance test and other DC tests, large power transformer transformers will generate a large amount of residual magnetism, which will greatly affect the normal operation of the transformer and transformer
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 magnetized, reducing measurement accuracy and the action 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. Adopting a new principle of DC frequency conversion attenuation;

2. Flexible testing wiring can achieve demagnetization by demagnetizing only one phase;

3. Rapid demagnetization: demagnetization has been reduced from the traditional 30 minutes to a minimum of 2 minutes;

4. Significant demagnetization effect - increased from 80% to over 90% in a single use;

5. Four wire wiring, which can directly use the current wire for DC resistance testing, making it convenient to match with DC resistance testing;

6. Clear interface, real-time display of demagnetization progress; This product has a small volume and light weight, making it very suitable for on-site use.

7. 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;

Demagnetization current: 1ma~10A can be set;

Demagnetization mode: fine demagnetization, standard demagnetization, rapid demagnetization;

Demagnetization time: Fine demagnetization: about 10 minutes/time (regardless of voltage level and capacity)

Standard demagnetization: about 5 minutes/time (regardless of voltage level and capacity)

Rapid demagnetization: about 3 minutes/time (regardless of voltage level and capacity)

Demagnetization progress: 0-100% automatic recording of demagnetization time;

Working power supply: AC 220V ± 10%;, Size: 32X26X25cm

Environmental temperature: -25 ℃~50 ℃, weight: 5kg (excluding testing line)