Hermetically sealed, non-venting electrical apparatus with diele

Details Hermetically sealed, non-venting electrical apparatus with diele Hermetically sealed, non-venting electrical apparatus with diele

1995-12-21

1998-04-07

Spyrou, Cassandra C.

Inductor devices

With temperature modifier

336 57, 336 58, 336 60, 336 61, 336 90, 336 94, H01F 2708, H01F 2710, H01F 2702

Patent

active

057369151

ABSTRACT:
An electrical apparatus, such as a transformer, includes an expandable internal chamber that is nonventing and completely and permanently sealed from the ambient environment. The chamber houses a core and coil assembly or other current-carrying conductor and is completely filled with dielectric fluid having a pressure less than one atmosphere. The enclosure walls are flexible and are permitted to bow inwardly and outwardly as the volume of the dielectric fluid changes due to thermal expansion and contraction. A method of processing the dielectric fluid and filling and sealing the transformer at sub-atmospheric pressure is also disclosed.

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Article entitled "Contoured Transformer Unveiled," p. 42 from Transmission & Distribution.

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