High voltage transformer and method.

摘要

A high voltage transformer includes a gas permeable crepe paper envelope (15, 27) wrapped around the transformer windings (5, 7, 21). The windings and crepe paper envelope are encapsulated in a gas impermeable material (31) using standard resin casting techniques and then impregnated with gaseous SF6 (35) which is a self-healing dielectric gas. The crepe paper envelope prevents the resin coating material from penetrating the windings, thus allowing better diffusion and contact of the dielectric gas with the windings.