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| Transformer |
| Distribution Transformer |
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VACUUM PRESSURE RESIN
IMPREGNATED DRY TYPE |
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| APPLICATIONS |
| At all such locations where conventional oil filled transformers present a Bafety hazards, Class 'F' & 'H' & 'C' insulated dry type transformers are most suited. Some of these location are: |
| 1 |
Oil refineries |
| 2 |
Chemical plants |
| 3 |
Marine applications |
| 4 |
Metro Railways |
| 5 |
High rise buildings. |
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| Where the transformers are required near the load Centre to achieve better regulation and low distribution losses, Class 'F' & 'H' & 'C' insulated resin imprefnated dry type transformers find the application : |
| 1 |
Steel works |
| 2 |
High rise buildings. |
| 3 |
marketing/Malls |
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| Besides some of the applications mentioned above, these transformers also find a place in underground railways. |
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| VPI TECH. Vs Cast Resign |
| System |
Flexible System |
Rigid System |
| i) Technology |
VPI with FG & Nomex |
Cast Resin |
| ii) Conductor Insulation |
Fibber Glass / Nomex |
No woven polyester |
| iii) Thermal Rating |
F, H or C available as per requirement |
B or F available only. |
| Product process |
Conventional Winding and Assembly |
Cost Mould Assembly |
| Impregnation |
Vacuum Pressure Impregnation |
Vacuum Cost but no Impregnation |
| Possibility of repair |
Yes Possible to repair |
Not possible at all |
| Cracking & Tracking |
Not possible as VPI Vacuum impregnation system provides good amount of flexibility. Hence, outer surface can not devlop cracks etc. |
Cast Transformer Epoxy Resin, can develop cracks as co-efficient of expansion of defferent at high temperature. |
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