ABSTRACT
The project study and analysis of power transformer failures and restoration techniques was aimed to address epileptic nature of electricity in Nigeria which is mostly due to failures of transformers. It also gives an insight on how to repair transformers and the different equipments used to effect those repairs. The aim of the project was to identify failed transformers and restoration techniques.
The method used to achieve this project was to have a two month intensive internship in ARMOND electrical company located along Sapele road, off limit junction Benin City. This company specialises in the sale and repair of power transformers, here I got the practical knowledge on how transformer is been repaired by analyzing different faults that occurs in transformers. I also did an analysis in the period I was there on the different transformer failures and which of them occurs the most. I also learnt how to use different equipments like the clamp on meter, megger and other equipments for transformer repairs, I also designed a chart showing the different failures and the one that occurs the most.
In the course of this project I made some findings, I found out that winding failure occurs the most compared to the other failures followed closely by low insulation, the electricity providers should change the transformer oil at least every three years as this would prolong the life of the transformer and prevent total breakdown of the transformer, they should also know the maximum load of the transformer so as the community expand a higher capacity transformer should be recommended.
Learning about transformer failures and restoration techniques was an interesting and challenging experience. In all early detection of the different failures is crucial in restoring the transformer.
