HT DISTRIBUTION TRANSFORMER

MAESTRO provides a wide range of Oll Filled Distribution Transformers which are conforming to the IS and International standards of quality and safety. These transformers are designed and developed using latest technologies and can be provided with a variety of terminations so as to suit the requirements for new installation of products. Optimum efficiency can be ensured by delicate proportioning of core and winding loses using CRGO M3 to M5 MOH Lamination and Electrolytic Grade 99.9% pure copper, with Transposition in LV. coil for current sharing in parallel Conductors, Electric grade mineral oll, press paper and boards. Thus better regulation is achieved resulting in longer life. Careful and precise designing also reduces noise level to the minimum.

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PRODUCT

MAESTRO make Sealed/Conventional, Single/Three Phase, 50 Hz aluminum / copper double wound, oil immersed, continuous heavy duty transformers are designed with Class A / Class F Insulation to withstand short circutt and impulse test standards. These are robust and durable machines which last for many years

CORE

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

WINDING

The winding are of different type 1)Spiral 2)Crossover 3)Helical 4)Dise designed to withstand the optimum electrical, mechanical, dynamic and thermal stresses depending upon the fand voltage. The coils are wound with electrolytic grade high conductivity annealed wire and strips covered with high Quality Insulation: All cols 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 transformers. Oll used as a coolant and insulating medium is of best quality confirming 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.

TANK & RADIATOR

The Tanks are made from prime quality mild steel sheets, plates and pipes by electrical welding. Proper bracing and stiffeners are provided for robust construction. The tanks are tested as specific pressure for leakage at joints. Sufficient cooling radiators are provided for maximum dissipation of heat during extreme amblent temperatures. The radiators are made from best grade presses steel fins or elliptical tubes

PAINTING

Tank surface exposed to atmosphere is galvanized/painted with two coats of red oxide paint to provide maximum resistance to corrosion and two coats of epoxy based anti-corrosion enamel paint. Surface in contact with oil is treated with two coats of Oil and Heat Resistant paint. This paint has more effective resistance compared to ordinary enamel paint against corrosion and oll/heat reactions.

VECTOR GTOUP

Dyn11, Various vector groups can be provided as per requirement.

TEMPERATURE RISE

Designed for maximum temperature rise at full rated load 40°C / 50°C for oil and winding of aluminum wound transformers and 45°C/50°C for oil and winding of copper wound transformers

OVERLOADING

MAESTRO Transformers are designed for overloading more than normal rating as per IS:6600

TERMINAL ARRANGEMENT

H.V. Bare Bushings or Cable Box, L. V. Bare Bushings or Cable Box. chambers can also be provided on both HV and LV Cable boxes.

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