Dry-type transformer and method of manufacturing

Inductor devices – With temperature modifier – Ventilating passages

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336205, 336206, 336196, H01F 2708

Patent

active

053962109

ABSTRACT:
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 an apparatus to secure the windings in place during a vacuum and pressure resin impregnation process. The result is a coil that exhibits high short circuit protection due to the tightly bond conductors comparable to completely resin encased molded transformers at a substantially reduced cost.

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patent: 4039990 (1977-08-01), Philp
patent: 4173747 (1979-11-01), Grimes et al.
patent: 4337569 (1982-07-01), Pierce
patent: 4488134 (1984-12-01), Pfeiffer
patent: 4496926 (1985-01-01), Kubo et al.
patent: 4649640 (1987-03-01), Ito et al.
patent: 4663604 (1987-05-01), VanSchaick et al.
patent: 5036580 (1991-08-01), Fox et al.

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