Patent ID: 8368499

Claim:
A disc winding for a power transformer or a choke with cylindrical windings, the disc winding comprising: a conductor including a plurality of parallel flat strand conductors; and a plurality of axial sections in which the winding is shared, wherein: each section comprises a plurality of discs, and each disc comprises a plurality of turns of the conductor, each disc being separated by spacers and the space between each spacer being a spacer span, each cross-over within a section is a twin cross-over in which the strand conductors are bent in two groups such that at least two of the strand conductors are comprised in the first group bent in a first spacer span, and the remaining strand conductors are comprised in the second group bent in a second spacer span adjacent the first spacer span, and a twin transposition cross-over is provided between every two axially adjacent sections such that an outermost strand conductor is bent in a third spacer span to be the innermost strand conductor and the remaining strand conductors are bent in another group in a fourth spacer span adjacent the third spacer span.