The following factors are taken into consideration at the time of installing transformers.
Proper foundation-
- The foundation must be strong enough to bear the load of transformer without any vibration and must be made with proper floor label and plinth label.
- The label of concrete plinth should be above the maximum flood label.
- Suitable rail tracks should be provided where rulers are used with the transformer.
Proper spacing for movement or maintenance-
- Minimum clearance between the transformer and wall should be as walls on four side is 1.25 meter.
- Walls on three side= 1.1 meter
- Wall on back side only= 0.51 meter
- Wall on two sides= 0.75 meter
- Ventilation area for outlet= 2m2 for 1000 KVA
- For inlet 1m2 for 1000 KVA
Location of switchgear-
The switchgear should be installed in a separate room. And power and controlled cables should be run in separate conduit pipe.
Proper cable trenches-
The cable should be installed in proper trenches, conduits, ducts or metal channels to protect them from moisture or any mechanical damage.
Provision for drainage of oil-
- Provision should be made for proper drainage of oil leaking from transformer.
- Proper slop to maintain and soak peat filled with sand and gravel should be provided with manholes.
- Gravel should be spread all around.
Fire protection-
Carbon tetra-chloride and foam type fire extinguishers and buckets filled with sand should be kept, ready for this purpose.
Noise reduction-
The transformer must be mounted on a non reflecting resistance pad and non vibrating surface to reduce the noise label considerably.
Cable boxes-
Transformer is fitted with cable boxes and is connected by paper insulated power cables.
Provision of supports of bushing-
LT cables should be supported on wooden support along with angle iron to avoid bending of cables coming out of the transformer otherwise the bushing will be cracked.
