1 Space requirement for transformer
Area
for transformer room: (As per NBC-2005)
Transformer Size Min. Transformer Room Area (M2) Min. Total Sub Station
Area(
Incoming HV,LV Panel, T.C Roof) (M2) Min.
Space Width (Meter)
1
x 160 14 90 9
2
x 160 28 118 13.5
1
x 250 15 91 9
2
x 250 30 121 13.5
1
x 400 16.5 93 9
2
x 400 33 125 13.5
3
x 400 49.5 167 18
2
x 500 36 130 14.5
3
x 500 54 172 19
2
x 630 36 132 14.5
3
x 630 54 176 19
2
x 800 39 135 14.5
3
x 800 58 181 14
2
x 1000 39 149 14.5
3
x 1000 58 197 19
-
The capacitor bank should be automatically switched type for substation of 5MVA
and higher.
- Transformer up to 25 KVA can be mounted
direct on pole.
- Transformer from 25 KVA to 250KVA can be
mounted either on “H” frame of plinth.
- Transformer above 250 KVA can be mounted
plinth only.
- Transformer above 100 MVA shall be protected
by drop out fuse or circuit breaker.
Will mostly the space for transformer are allocated depends upon the transformer size and room area size?
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