Design Philosophy Transformers

Design Philosophy

Over sixty years of design experience and computer-aided design tools combine to ensure the quality, reliability and efficiency of our transformers.

The design process begins with accessing design data from our database, followed by the generation of alternative core and coil designs, finally completing with the selection of the most optimum design. Many of our transformers have successfully undergone short-circuit test at the Central Power Research Institute (CPRI).

All our transformers are designed as per the IS, IEC standards, in line with the customer’s requirements. The transformers are designed and validated on high-end design software imported from a recognized and reputed technical institute.

Core

The Core is built from prime grade silicon steel laminations.

Hi-B grade material, step lap construction and boltless assembly reduce the core losses. Limbs are clamped with specified design pressure with the help of resin bonded glass bands. Oil ducts enable effective cooling.

Windings

Windings are assembled on the core, and radially supported by pre-compressed pressboard spacers to withstand radial forces generated under short-circuit condition. Clamping the windings in position counters out-of-balance axial forces and ensures that they are held in position throughout the transformer’s life.

Special extra flexible, insulted copper cables, which are rigidly braced in position, connect the ends and taping leads of the windings.

The core and the coil assembly are dried in a vapour phase drying plant from MICAFIL.

The coils are hydraulically pressed and locked with pressure blocks to provide rigidity. The core-coil assembly is located and locked in the tank to prevent movement of the active part in transit.

The tank is filled with oil under vacuum conditions to attain a moisture and gas content well within the desired specification levels.

The transformer is made ready for final inspection after assembling the bushings, conservator, radiator and other accessories.

Core and Winding Assembly

Windings are assembled on the core, and radially supported by pre-compressed pressboard spacers to withstand radial forces generated under short-circuit condition. Clamping the windings in position counters out-of-balance axial forces and ensures that they are held in position throughout the transformer’s life.

Special extra flexible, insulted copper cables, which are rigidly braced in position, connect the ends and taping leads of the windings.

The core and the coil assembly are dried in a vapour phase drying plant from MICAFIL.

The coils are hydraulically pressed and locked with pressure blocks to provide rigidity. The core-coil assembly is located and locked in the tank to prevent movement of the active part in transit.

The tank is filled with oil under vacuum conditions to attain a moisture and gas content well within the desired specification levels.

The transformer is made ready for final inspection after assembling the bushings, conservator, radiator and other accessories.

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