At Macro Powertech we manufacture power transformers upto 20 MVA capacity with 11/22/33/66 KV class. Transformer cores are build 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 noise levels as committed. Power Transformer windings are made of electrolytic grade copper with continuously transposed conductors as per the designs requirement. The winding has axial nad radial cooling ducts to ensure effective heat dissipation in to 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. Power Transformers, core-coil assembly are 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. 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.
505, 5th Floor, Laxmideep Building, Laxmi Nagar, Distt Center , Distt Center Delhi - 110092, India
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