Field relaxation shield for stationally induction apparatus

TLDR: In this article, the authors propose to take sufficient electrical potential from the face of a fibrous molded member even if it is wet, dry or thermally expanded, by mounting metallic conductive strips formed by knitting fine metallic wires on the face.

Abstract: PURPOSE:To make it possible to take sufficient electrical potential from the face of a fibrous molded member even if it is wet, dry or thermally expanded, by mounting metallic conductive strips formed by knitting fine metallic wires on the face of the fibrous molded member. CONSTITUTION:A metallic conductor 13 is formed by knitting soft metallic wires 13a such as fine copper wires into a tape shape, so that it can expand and contract by several percent in the longitudinal direction. Accordingly, if a pressboard 11 containing water corresponding to relation humidity contracts as it dries or is heated, the conductive strip 13 flexibly changes its dimensions according to any change of the basic pressboard 11 and a conductive layer 12 bonded to the surface of the pressboard 11, so that it will not be stripped thereform. Further, the conductive strip 13 has a meshed structure which allows a conductive bonding material to penetrate into the mesh when the strip is bonded to the conductive layer 12, whereby electrical connection as well as bond reliability can be improved.