Dielectric fluids comprising non-halogenated mixtures of organic esters and aromatic compounds
US4276184A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 1976 |
| Grant date | Jun 30, 1981 |
| Priority date | — |
| Expiry date | Mar 30, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01B3/20
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.