Distribution Transformer Assembly

Product Description
ABC make Sealed/Conventional, Single/Three Phase, 50 Hz Aluminium/Copper double wound, Oil immersed, Oil immersed, Continuous heavy duty transformers are designed with A Class/F class insulation to withstand short circuit and impulse test standards.

Standard Transformers are designed and manufactured conforming to the following Indian Standard Specification, with latest version.

Core
Core is made from best grade imported cold rolled grain oriented silicon steel laminations with the latest technique of annealing. Interleaved and mitred joints reduce the core losses and magnetizing current considerably. Core is specially designed to sustain over fluxing up to 12.5%. Individual stamping is insulating on both side with oil resistant and temperature resistant insulating material. Core is clamped with steel channels rigidly to reduce the cartite sound level and earthed with electrical grade copper sheet.

Winding
The winding can be any type (i)spiral (ii)crossover (iii)helical (iv)disc, designed to withstand the optimum electrical, mechanical, dynamic and thermal stresses depending upon the current and voltage.

The coils are wound with electrolytic grade high conductivity, annealed wire and strips covered with high quality insulation. All coils are reinforced, insulated and impregnated with insulating varnish to with stand the effect of short circuits and impulse voltage shocks. Cooling ducts are provided to minimize the hotspot temperature and temperature gradient between winding and oil.

Insulation and Oil
The insulation material like pre-compressed boards, blocks, corrugated cylinders, bakelite tubes, insulating tapes, empire sleeves, glass sleeves varnish, epoxy bushing, porcelain bushing etc. are used of best quality to ensure long life of the transformers. Oil used as a coolant and insulating medium is of best quality conforming to IS:335. Before filling in to the transformers, oil is centrifuged, dehydrated and filtered through 'Stream Line Filtration Plant' and tested to ensure free from moisture.

Terminal Arrangement
A choice of four terminal arrangement

Bare Bushing cable box bare bushing cable box.