Dressing

They are wound on modern winding machines:

Distribution Transformers Windings: Layer insulation in low voltage winding conductor copper plate windings is provided by thermally improved resin paper (DPP).

High Voltage winding conductor copper Windings are enamel coated round copper wire, insulation paper covered flat copper wire. Layer windings are wound with computer-controlled fully automatic machines, the layer insulation is formed in the form of a wedge with strip-shaped electrical insulation papers (electrical kraft, thermally improved kraft and resin thermal paper). This layer insulation structure not only increases the resistance of the winding against excessive voltage pulses; This method allows to obtain void-free, solid coils with excellent properties.

Power Transformers Windings:

Low voltage and high voltage winding conductor is copper. Windings are wound using copper wire covered with insulation paper as layer winding, continuous disk winding, helical winding or screw winding, depending on the transformer power.