Use flame retardant oil (silicol or Biotemp) that does not emit flame when burning, but still have to use oil drain like conventional oil machine.
Especially Biotemp oil insulator is extracted from sunflower oil, so it is non-toxic and environmentally friendly.
Easy warranty and maintenance because it can be checked with normal eyes.
The investment cost is cheaper than the dry transformer of the same capacity
Because it is not explosive, the silicol oil transformer, Biotemp is allowed to be placed in any location in the building.
Thank to the advantages mentioned above on silicol oil transformers, Biotemp is often used in basements of buildings, hotels, and commercial centers