Dry (CRT) Transformer
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Dry (CRT) Transformer
We at Tekla Energy are manufacturing Cast resin dry type transformer (CRT) and Vacuum Pressure Impregnated Transformer ( VPI ). CRT is used in the high moisture prone areas. It is because of its primary and secondary windings are encapsulated with epoxy resin. This encapsulation helps to prevent moisture to penetrate to affect the winding material. Complete protection is achieved by this cast resin encapsulation so that the transformer can work without disruption in highly moisture prone area.
Thus this transformer is non hygroscopic. This type of transformer is available in ratings of 25 KVA to 12,500 KVA. with insulation class of F (90oC Temp. Rise). VPI type of transformer is made with the least flammable material as insulation for the windings. The windings of this transformer are made in foil or strip in a continuous layer. But for higher voltages, the winding is made of disks that are connected in series or parallel as per power rating with respect to voltage level.
The insulation of the winding is void free impregnation that is made with class H polyester resin. The primary and secondary windings with core are laced safely within a vacuum protective box. Moisture ingress protection is high and it never gets affected by moisture.
Application in following industries :
- These transformers are used in small and medium voltage distribution network for hotels
- Feeding basements or stilts of high-rise buildings, air ports
- Stadium, shopping malls, chemical, refinery plants and industries located in coastal regions
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