Oil immersed distribution transformers

The transformers are built in accordance with IEC 60076 standards (or other International standards) and with efficiency as per EN 50464-1.
The core is built up of cold rolled oriented grain steel sheet with low specific losses, insulated on both sides by a thin inorganic coating (Carlyte). 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.
  • Technical features

    Standard: the transformers are built in accordance with IEC 60076 standards (or other International standards) and with efficiency as per EN 50464-1.
    Core: the core is built up of cold rolled oriented grain steel sheet with low specific losses, insulated on both sides by a thin inorganic coating (Carlyte). The single sheets composing the core are cut at 45°. Uniform pressing, stiffness and solidity of the columns assure a low noise level.
    Windings: the windings are made of electrolytic copper. Wide oil ducts, obtained by corrugated and pressed cardboard, allow a perfect oil circulation, also inside the windings. Before assembling, the windings are submitted to drying and impregnation process. Tank: the tank is made of welded reinforced steel sheet, internally and externally painted with special epoxy enamel, corrosion proof. The cooling is obtained by means of radiators or corrugated steel (fins).
    Bushings: are made of brown porcelain, in accordance with UNELDIN- ANSI standard or other required.
    Oil: 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.
    Standard accessories: off load tap changer, oil conservator, oil level indicator, oil filling and drain vent, air vent, dehydrating breather connection, thermometer pocket, earthing terminal, lifting lugs, bidirectional wheels.
    Optional accessories: cable box for MV and or LV bushings; thermometer dial type with electric contacts, Buchholz relay, dehydrating breather, MV tap changer, centralization box.
    Test: all transformers are singly tested with routine test, according to IEC 60076 standards. Upon request the following type test can be carried out: temperature rise, full wave impulse test, noise level.
    Installation: inside and outside.
  • Functional characteristics

    Reliability: the secular production experience of oil transformers guarantee a safe product.

    Ambient: the transformers are apt for humid ambient, with electric conducting dust. If foreseen they can be installed in safety increased or explosion proof area and by using an appropriate oil, they can stand a temperature below -25°C.

    Noise: noise level is reduced and limited from oil and tank.

    Partial discharges: reduced or none.

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