In addition to petroleum-based insulating oils, THIBIDI also provides FR3 Envirotemp insulating oil, which is a plant-based oil. This oil is environmentally friendly and has a high flash point, significantly reducing the risk of fire and explosion, thereby ensuring safety in residential areas. FR3 oil is used in transformers as per customer requirements.
Core Assembly:
- The assembly is carried out on a production line and undergoes testing at each stage. The steel core is placed on a base and the winding coils are mounted onto the core. After checking the insulation parts and positioning devices, iron
yokes are installed and securely clamped with bolts.
- The outgoing wire ends are adjusted and insulated with special paper tubes, with positioning papers and separators to prevent confusion.
- The low-voltage wire ends are tightly clamped with bolts and porcelain insulators
Drying and Oil Filling:
- Drying and Oil Filling:
- All transformer cores are dried in a special drying oven, then filled with oil in a vacuum environment using oil that has been processed through a vacuum oil filtration machine. The insulating oil meets technical specifications according to IEC standards and does not contain PCBs.

Vacuum System and Oil Pouring
In addition to petroleum-based insulating oils, THIBIDI also provides FR3 Envirotemp insulating oil, which is a plant-based oil. This environmentally friendly oil has a high flash point, significantly reducing the risk of fire and explosion, ensuring safety in residential areas. FR3 oil is used in transformers as per customer requirements.