1. Selection of Economical Transformer.
2. Area of room for installing transformer
3. Quality of Transformer Oil.
4. Reduction in number of radiator tube of transformer.
5. Circulating current in Transformer.
6. Tolerance of Transformer Parameter.
7. Noise level of transformer.
8. Formula for noise level of transformer.
9. Limit of Harmonics.
10. Selection of fuse rating for transformer
11. Rating of lightning arrestor.
12. Factors affect the life of transformers
13. Transformer Connection Star-Star and Delta-Delta
14. Transformer connection DY11 and YD11

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