Patent ID: 8456264

Claim:
A stationary induction apparatus having a partial coil assembly constituted of a plurality of partial coils disposed to be opposed and to overlap with each other, comprising: refrigerant flow paths formed on both sides of each of the plurality of partial coils; and an inter-partial-coil supporting portion that is disposed between adjacent partial coils to cover an entire overlapping region between the adjacent partial coils, supports each of the adjacent partial coils in an insulated state so that a space is secured between the adjacent partial coils, and forms one of the refrigerant flow paths between the adjacent partial coils, wherein the inter-partial-coil supporting portion has a first surface that is opposed to one of the adjacent partial coils, and a second surface that is a surface opposite to the first surface and is opposed to another one of the adjacent partial coils, wherein on at least one of the first surface and the second surface of the inter-partial-coil supporting portion, there are a plurality of inter-partial-coil protrusions which are disposed to protrude from the at least one of the first surface and the second surface, and which are disposed with spaces for forming one of the refrigerant flow paths together, wherein between the inter-partial-coil protrusions of the inter-partial-coil supporting portion, there are formed a plurality of openings communicating to the one of the refrigerant flow paths for guiding a refrigerant to the outer surface of the partial coil, a plurality of openings cover the entire overlapping region between the adjacent partial coils.