Oil Cooled Transformers

Core: The Core is build up from interleaved low loss cold rolled, grain oriented Silicon Steel laminations. Individual stampings are coated on both sides with an insulating material, which is both oil and temperature resistant. The core limbs are securely bound with heavy duty webbed cotton taps and the yokes are firmly clamped between steel channels, all cores have mitered joints. Windings: Transformer windings are designed to meet three fundamental requirements such as mechanical, thermal and electrical. They are cylindrical in shape and are assembled concentrically. The low-tension windings are of the helical type, single or multilayer, using flat copper strips, depending upon the size and current rating of the transformer. The high-tension windings consist of paper covered conductors (round and strips) depending upon the current rating of the transformer. For higher capacity continuous disc windings are used. The windings are rigidly supported by pressboard washers and spacers.