H - Electricity – 01 – F
Patent
H - Electricity
01
F
H01F 41/06 (2006.01) H01F 27/32 (2006.01) H01F 41/12 (2006.01)
Patent
CA 2105795
A dry type transformer has an iron core, high voltage windings embedded in cast resin, and low voltage windings resin encapsulated. The low voltage winding is constructed with flexible sheet conductors. Insulating material includes a means to secure the windings in place during a vacuum and pressure resin impregnation process. A unique cylinder or mandril provides a flat surface for one of the low voltage external leads to rest on during the start of the coil winding process. Cooling duct sizes and locations in the windings are varied during winding. The result is a finished coil that maintains an essentially cylindrical shape.
Purohit Dilip Rasik
Soter Timothy Alan
Fetherstonhaugh & Co.
Square D. Company
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