Answer Posted / 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
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