Answer / infodoss

i) Step up transformer
ii)step down transformer
depending upon the construction
i) single Phase
ii)Three phase
depending upon the core
i)Shell
depending upon the connection
i)Star delta
ii)Star Star
iii)Delta delta
iV)Delta star

Answer / k.babu

Current transformer
Power Transformae
Auto Transformer

Answer / ragunathan

Construction wise
1)In door
2)Out door
3)Oil imressed
4)Dry type

COOLING TYPE
1)OIL NATURAL AIR NATURAL
2)OIL NATURAL AIR FORCED
3)OIL NATURAL WATER FORCED

PURPOSE WISE
1) POWER TRANSFORMER
2) AUILIARY TRANSFORMER
3) CURRENT TRANSFORMER
4) VOLTAGE TRANSFORMER

CONNECTION WISE
1) YY0
2) YY1
3) YY11
4) DD0
5) DD1
6) DD11
7) YnD1
8) YnD11
9) DYn1
10)DYn1

Answer / e.ramasami

1.)oil type
2.)dry type

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