Patent ID: 8115584

Claim:
An induction device for association with high voltage electric transmission systems comprising: at least one core frame, at least one winding arranged around said core frame, at least one magnetic core leg arranged in said core frame, a stack of core segments of a magnetic material being cooled by a cooling medium, arranged in compression in said core frame, core gaps being arranged to separate said core segments, and a plurality of spacers, arranged in said core gaps between the core segments, the plurality of spacers having a cross section of hexagonal shape and having an upper and a lower end-face being in contact with the core segments, characterized in that said spacers are arranged densely packed so as to form a compact filling in at least one of the core gaps, and that for at least some of the spacers the edges of the end faces of two neighboring spacers are arranged with chamfers allowing said neighboring spacers to form a common cooling duct for said cooling medium.