What should be paid attention to when inspecting dry transformers？

Inspection of dry transformers

1. Is there any abnormal sound and vibration. .

2. Whether there is local overheating. Harmful gas corrosion and other discoloration caused by creepage traces and carbonization on the insulating surface. .

3. Whether the air-cooling device of the dry transformer is operating normally. .

4. There should be no overheating of high and low voltage joints. There should be no leakage and creepage at the cable head. .

5. The temperature rise of the winding should be based on the insulation material grade used by the dry transformer, and the monitoring temperature rise should not exceed the specified value. .

6. The supporting porcelain bottle should be free of cracks and discharge traces. .

7. Check whether the winding pressure piece is loose. .

8. Indoor ventilation should be. The iron core air duct should be free of dust and debris, and the iron core should not be rusted or corroded.