Question { 21426 }

How is a 100 MVA transformer cooled?

Answer

100 MVA TRANSFORMER OF AREVA AND ABB AND EMCO COOLED BY ONAN AT 80 MVA AND ABOVE THIS ONAF METHOD.

Question { 18578 }

what is meant by transformer?

Answer

transformer is an electrical machine which is used to increase or decrease the voltage level carasponding decrease or increase in current level.but frequency does not changed in this process.
trasformer can be divided in to two catagaries on basis of working-
1. step up transformer
2. step down transformer
trasformer can be divided in to two catagaries on basis of internal structure-
1. core type
2. shell type

Question { 4458 }

what is difference between power transformer and distribution
transformers

Answer

power transformer is used at generating station and its rating is above 200kva but distribution transformer is used in distribution system to step down the transmisson voltage to distribution voltage and its rating is about 200kva it is kept in operation all the 24 hours a day whether they are carring any load or not.