Manufacturing Standards
The transformers are built in accordance with IS 2026/IS 11171 and IEC 726 standards

Core
The core is built of cold rolled oriented grain steel with low specific losses, insulated on both sides by a thin inorganic coating (Carlyte). The sheets composing the core are cut at 45 degrees C. Uniform pressing, stiffness and solidity of the columns assure a low noise level.

High Voltage Windings
The high voltage windings are realized by disc/ Comb winding, depending on the feeding voltage and transformer power. The copper conductor is NOMEX/FIREGLASS insulated or class H enamel. Adequate axial channels between the layers of windings grant a uniform cooling. Insulation between high and low voltage and core is made by fibreglass cylinders. All the winding are dried in an oven and impregnated under vacuum by using class F/H insulating Varnishes/ Resin.

Low Voltage Windings
The low voltage windings are made of copper Strip/Foil (Above 1000 KVA). This modern technology assures an excellent resistance to electrodynamic stresses, much higher than the one obtained with traditional elix windings. The insulation between windings is obtained by using class F/H material.