It’s obvious, if you wish to have a transformer with long and trouble free service life, you should be able to provide it a reasonable amount of required maintenance. Oil cooled transformers manufacturers are sharing basic maintenance procedures that service men should follow to detect and fix all the faults of the unit. Methods to consider are as under-
A condition assessment should be able to detect initial changes in condition for any things that are smaller as compared to the deterioration required for failure. The measurement allows detecting early failure symptoms that may be more complex for transformers with smaller power rating.
Condition based monitoring (CBM)
Condition based monitoring involves monitoring of the changing condition of any item on an ‘as and when’ basis.
On-line condition monitoring (OLCM)
This type of monitoring involves data, measurements or samples collection during when the transformer is energized at the site.
Time based maintenance (TBM)
This type of monitoring includes regular, programmed inspection that is followed by any testing and reconditioning whenever required. Records are made for any abnormalities during service.
Why maintenance is required for a transformer?
Every maintenance service provider works with an objective, i.e. to preserve the original properties of the transformer unit and its parts in order to make it function properly.
Moisture, excessive heat, dirt, over loading, mishandling are the real causes of insulation deterioration. The severe environment and weathering condition result in corrosion, which causes rusting of cooling radiators or fins. It also damages the terminal bushings if outer porcelain shell is used.
The service professionals must check that external circuits are disconnected before starting the maintenance work for the transformer. Certain factors that can influence maintenance practice and effort of the service professionals are as under-
There are few liquids other than conventional insulating oil, with high ignition point and are considered as environment friendly. One of them is mineral insulating oil that functions as a coolant and insulant in the transformer. To keep the oil in good condition, regular service maintenance is needed which help prevent deterioration of the solid insulation materials inside the transformer unit. Oil cooled transformers need to undergo these services to have longer service life.
If you are making any order for oil immersed transformer, get in touch with your local dealer for best offers.
Step up or step down transformers are used to regulate electricity voltage. And when a transformer fails, it may result in fire. To prevent fire accidents due to transformer failure, transformer repairing and maintenance services providers offer the best service for different types of transformers.
What causes transformers fire?
When electricity voltage supply is higher than the recommended rate, the sudden surge can cause fire mishaps in a transformer. When a transformer detects any change in electricity supply, it automatically turns off. However, it can take up to 60 ms for the automatic shutdown, but still it may be slower to prevent the electrical overload.
Transformer includes a chamber that has gallons of mineral oil. This oil is used to keep the temperature of circuits cool. When there is excessive power supply, the circuits may fry and melt. This may result in sparks and burn the mineral oil of chamber. It can be anything- a corroded or old wire to set transformer on fire.
Transformers nearby the sea can get into hazardous condition due to underground electrical systems as salt from sea water will act as a corrosive agent.
Older transformers can be burn when their insulation fails.
Other Common Reasons to Transformer Failure-
How to prevent transformer from burn?
The only way to protect your transformer from failure and explosion is to perform transformer maintenance checks daily, every month, and annually.
Some transformer maintenance checks to be performed on daily basis –
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