An effective maintenance plan requires of:

You need to register: The values ​​of current, load voltages,temperature of dielectric oil and windings, nitrogen pressure, oil level. Transformer general inspection and unusual sounds.

A several electrical tests are performed on the transformer, unit and transformation chamber cleaning is necessary every 2 or 3 years depending on the loadability of the equipment.

The oil sample is taken in a suitable container used for this purpose. It is used to determine the quality of the oil and to diagnose the condition of the paper – oil insulation system to perform an adequate maintenance to the transformer.

It allows to detect the concentration of combustible gases and their composition ratio to incipient or advanced failure of internal discharges, crown effects and cellulose or oil overheating, allowing us to program an internal inspection of the unit and avoid important faults in the transformer.