| 1.Check the colour of silica gel if colour change from blue to pink shall be replace. |
| 2.Check and tighten every HV. and LV. contract avoid possible Arc and Oxidation. |
| 3.Cleaning of Arcing horn checking. |
|
4.HV. and LV. Bushing cleaning. |
|
5.Tap changer swith checking. |
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6.All seals checking. |
| 7.Check the level and insulation of transformer oil. |
| 8.Test the operation of Buchholz Relay. |
|
9.Insulation check - Between HV. and LV. - Between HV. Windings and Earth - Between LV. Windings and Earth Together with checking of the humidity inside the transformer. |
| 10.Cleaning and leaking check around the tank |
| 11.Checking of norm temperature and operation of dial thermometer. |
| 12.Earth system checking. |
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