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Distribution & Power Transformer
Distribution & Power Transformer
Icon Powertech is a manufacturer and exporter of automatic voltage stabilisers, transformers with built-in stabilisers, rectifier equipment and special purpose transformers. The company offers a Distribution and Power Transformer, for efficient power supply. Single phase distribution transformers are suitable for up to 25 kVA, designed with protection circuit; and three phase distribution transformers up to 2000 kVA, 11/22/33/66 kV class. The company manufactures power transformers up to 20 MVA capacity with 11/22/33 kV class. Transformer cores are built with CRGO, low loss silicon steel laminations. Use of Hi-B grade and laser scribed laminations for the core significantly reduces no load losses and nose levels as committed. Power transformer windings are made of electrolytic grade copper with continuously transported conductors as per the designs requirement. The winding has axial and radial cooling ducts to ensure effective heat dissipation into the oil and eliminating the hot spots. For high voltage windings, disc coils with excellent mechanical strength are used to take the stresses due to voltage level. A special interleaved or shielded construction offers most uniform voltage distribution despite system transients. The core-coil assembly of power transformers is rigidly supported by a common pressure ring of densified wood at the top and bottom, for precise alignment. Well profiled angled rings are placed between HV and LV windings to reduce voltage stress levels. The ends and tapping leads to all the windings are connected by special extra flexible, insulated copper cables, which are rigidly braced in position. The core-coil assembly is put into the tank with proper locating arrangements. The tank is then filled with hot oil, filtrated by high vacuum oil filtration plant. In power transformers, tanks are built with mild steel plates to withstand full vacuum, conforming to the international standards. Lugs for jacking, lifting and hauling are routinely tested for dye penetration. Tanks have welded or bolted top cover. Tanks are shot blasted to get a surface finish to have double coat of epoxy paint after double coat of epoxy primer. The transformer is made ready for final inspection after assembly of bushings, conservator, radiators, etc.