Cooling ducts for transformers' winding

摘要

Winding arrangement (300) for an electric installation, the winding arrangement (300) comprising an electric conductor (309) and a plurality of cooling ducts (301-304), wherein the electric conductor is coiled up forming several layers (321-327) around an axis (330), wherein:
- each cooling duct (301-304) of said plurality of cooling ducts extends between a pair of adjacent layers (321-327) of the coiled electric conductor (309) in axial direction through the winding arrangement (300) and in tangential direction not entirely around the axis (330);
the cooling ducts (301-304) of the plurality of cooling ducts are distributed among more than one pair of adjacent layers (321-327) such that the winding arrangement (300) is essentially cylindrical.