Winding Manufacturing:
Low voltage windings of the distribution transformers are wound in foil type.Foil winding machine used in BEST. High voltage windings are wound in cylindrical winding machines. Different winding techniques are used in BEST according to rated power, voltage and vector group of the transformers.

Assembly:
Magnetic core, windings and other parts are assembled in Assembly shop. Before filling the transformer with oil, the actice part is dried in the oven under the kerosine vapour at high temperature (135 C max) and full vacuum.

Tank Manufacturing:
Transformer tank, cover, oil conservator and main metalic parts are also manufactured in the BEST by advanced techniques. Plasma cutting machine is used to process cover holes and some other parts such as fixing parts and lifting lugs. Sandblasting cleaning process is applied to the tank and cover of the transformers and if required they are also treated with chemical cleaners.They are degrased and phosphated by hot water solution spraying against rust and corrosion.
BEST, now, with our new mechanical factory has a capacity to manufacture all kind of mechanical parts (tanks, covers, conservators, etc.) up to 32T weights, i.e. up to 600 MVA.