Sealed and cooled enclosure with voltage isolation

Details Sealed and cooled enclosure with voltage isolation Sealed and cooled enclosure with voltage isolation

2011-04-12

2011-04-12

Patel, Dhiru R (Department: 2835)

Electricity: conductors and insulators

With fluids or vacuum

Boxes and housings

C174S015100, C361S676000

Reexamination Certificate

active

07923630

ABSTRACT:
An enclosure (4) for electrical apparatus (6) has a sealable outlet (8) for partially evacuating the enclosure and a sealable inlet (9)for partially filling the enclosure with a liquid (7) having a vapor pressure at operating temperatures of the apparatus suitable to enhance electrical isolation of the electrical apparatus and suitable to provide convective cooling of the electrical apparatus. The vapor preferably provides a voltage hold-off sufficiently high for operating voltages of the electrical apparatus and has a relative permittivity sufficiently low to prevent stray capacitance in the electrical apparatus above a predetermined limit.

REFERENCES:
patent: 4100366 (1978-07-01), Mears
patent: 4440971 (1984-04-01), Harrold
patent: 4694375 (1987-09-01), Devins et al.
patent: 6184459 (2001-02-01), McShane et al.
patent: 6717812 (2004-04-01), Pinjala et al.
patent: 2005/0157480 (2005-07-01), Sun et al.
patent: 2161989 (1986-01-01), None
patent: WO 2005/081401 (2005-09-01), None
United Kingdom Search Report dated Jul. 16, 2007 priority application GB 0706196.3.

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