How to check dry-type transformer

⒈ Whether there are abnormal sounds and vibrations.
⒉ Whether there are local overheating, harmful gas corrosion, etc., which cause discoloration caused by creepage marks and carbonization on the insulation surface.
⒊ Whether the air cooling device of the transformer operates normally.
⒋ The high and low voltage joints should not be overheated. The cable head should not have leakage or creepage.
⒌ The ​​temperature rise of the winding should be monitored according to the insulation material grade used by the transformer, and the temperature rise should not exceed the specified value.
⒍ The supporting porcelain bottle should be free of cracks and discharge marks.
⒎ Check whether the winding pressing parts are loose.
⒏ Indoor ventilation and iron core air ducts should be free of dust and debris, and the iron core should not be rusted or corroded.