Dielectric fluids comprising non-halogenated mixtures of organic

Details Dielectric fluids comprising non-halogenated mixtures of organic Dielectric fluids comprising non-halogenated mixtures of organic

1976-03-30

1981-06-30

Pitlick, Harris A.

Compositions

Fluent dielectric

O-containing

H01B 322, H01B 320

Patent

active

042761840

ABSTRACT:
Dielectric fluids are disclosed which comprise about 20 to 95% of a non-halogenated organic ester which is liquid between -20.degree. C. and 150.degree. C. and which has a dissipation factor of less than about 10% at 100.degree. C., and about 5% to 80% of a non-halogenated, aromatic hydrocarbon or ether, which is soluble in the ester, has 1 to 2 rings, and has a dissipation factor of less than about 10% at 100.degree. C. The preferred dielectric fluid is about 75 to 90% diisononyl phthalate and about 10 to 25% diphenyl oxide. An anti-oxidant and/or an additive to resist the effects of corona (partial discharges) are preferably included in the dielectric fluid. A capacitor containing a paper, film, or composite of these, impregnated with the dielectric fluid, is also disclosed.

REFERENCES:
patent: 1746977 (1930-02-01), Wilder
patent: 2007792 (1935-07-01), Clark
patent: 2176952 (1939-10-01), Berberich
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patent: 2922938 (1960-01-01), Petley
patent: 3053768 (1962-09-01), Cupper
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patent: 3673093 (1972-06-01), Rocchi
patent: 3754173 (1973-08-01), Eustance
patent: 3796934 (1974-03-01), Munch
Reynolds et al., "Evaluation of Dielectric Fluids by Gassing-Cell Tests", Proc. IEE, vol. 119, No. 4, Apr. 1972, pp. 497, 501, 502.
Sauer et al., "Stabilization of Dielectrics Operating under Direct Current Potential", Industrial & Engineering Chemistry, vol. 44, No. 1, Jan. 1952, pp. 135-140.

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