DEHYDRATION

We have Dehydration Facility upto 100 MVA 220 kV Class
Another main component besides the core and the winding is the tank of a Power Transformer. It accommodates the active part and the oil filling. After vacuum drying process the active part is removed from the Oven and all components subject to the shrinkage are tightened again. The core & cel assembly is then placed into the tank and property lacked up during the transformer manufacturing process.

The temperature and exposure time is monitored during this time to ensure that the transformer is not too cool by the time it is get off from the oven. While in higher rating transformer, the vacuum is drawn for a period of time dependent on the voltage of the unit and time for which the active part was exposed to the atmosphere and the humidity at the time. The vacuum period is between 12 to 35 hours. Meanwhile the external wiring and termination work to be completed as per customer requirements.