The effect of molecular structure on the properties of dielectric fluids

Author

Forster, E.O. ; Mazzetti, C. ; Pompili, M. ; Cecere, R.

Author_Institution

Dept. of Electr. Eng., Rome Univ., Italy

Volume

26

Issue

4

fYear

1991

fDate

8/1/1991 12:00:00 AM

Firstpage

749

Lastpage

754

Abstract

The dielectric properties of six test fluids (MDBT, DTE, DINP, PXE, PFPE, and PPMS) were evaluated under AC and DC stresses. The data suggest that DC conduction is less sensitive to molecular structure effects than to impurities while AC conduction reflects more molecular characteristics. Within a family of fluids such as liquid aliphatic hydrocarbons, both the AC and DC breakdown level are adversely affected by impurities which increase their conductivities. Among different types of fluids, molecular structure has a significant impact on DC impulse breakdown. Conventional (50 or 60 Hz) AC breakdown appears to be much less sensitive to structural effects

Keywords

dielectric properties of liquids and solutions; electric breakdown of liquids; electrical conductivity of liquids; organic compounds; organic insulating materials; 50 to 60 Hz; AC conduction; AC stresses; DC conduction; DC stresses; DINP; DTE; MDBT; PFPE; PPMS; PXE; breakdown level; dielectric properties; fluids; impurities; liquid aliphatic hydrocarbons; molecular characteristics; molecular structure effects; Breakdown voltage; Dielectrics; Electric breakdown; Electrons; Helium; Hydrocarbons; Impurities; Liquids; Testing; Visualization;

fLanguage

English

Journal_Title

Electrical Insulation, IEEE Transactions on

Publisher

ieee

ISSN

0018-9367

Type

jour

DOI

10.1109/14.83698

Filename

83698