space requirement for transformer

1     Space requirement for transformer 

SPACE REQUIRED FOR TRANSFORMER INSTALLATION 

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.