High voltage windings for shell-form power transformers

Details High voltage windings for shell-form power transformers High voltage windings for shell-form power transformers

H - Electricity

01

F

336/50

H01F 27/28 (2006.01) H01F 27/32 (2006.01)

Patent

CA 1301269

ABSTRACT A high voltage electrical winding 27 for shell form transformers 7 is disclosed that reduces eddy current and circulating current losses within the winding. The winding is fabricated from an elongated conductor bundle 40 that is spirally wound into a plurality of turns. The conductor bundle 40 is formed from a multiplicity of enamel coated elongated conductor strands 45 arranged in side by side relation. Each of the conductor strands has a rectangular cross section with a thickness of less than approximately 40 mils between contacting surfaces. The strand's cross sectional height is preferably less than 120 mils. The conductor strands 45 are mounted side by side such that their respective contact surfaces abut. The conductor bundle is preferably wrapped in an adhesive tape 57 to give the bundle some structural support and to provide insulation between winding turns. The disclosed winding also has very good mechanical strength and impulse distribution.

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