The oil immersed distribution transformer are built in accordance with IEC 60076 standards.For European market ,the calculation is made according to Ecodesign regulation, norms EN 50588-1.The distribution transformer core is built up of cold rolled oriented grain steel sheet with low specific losses, insulated on both sides by a thin inorganic coating. The single sheets composing the core are cut at 45°. Uniform pressing, stiffness and solidity of the columns assure a low noise level. the transformers are filled with mineral oil, according to IEC standards. The oil is previously treated and dried. Upon demand, filling can be made by using insulating silicon oil or vegetable and biodegradable.
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