Electrical insulating properties of some varnish compositions

Abstract

The dielectric constant (E′), dielectric loss (E″) and power factor (tan §) were measured for various excess hydroxyl content resins (polyesteramide, alkyd/polyesteramide and alkyd resins) and also for their corresponding dry films. Measurements were conducted within the frequency band 105 to 107 Hz and temperature range 20–50°C. The various parameters affecting the dielectric behaviour of resin varnishes and their dry films are discussed. Also the effect of ageing at 110°C upon the dielectric behaviour of dry films is another parameter taken into consideration.

Citation

Salman, A.A., El‐Anwar, I. and Mohamed, M.D.M. (1989), "Electrical insulating properties of some varnish compositions", Pigment & Resin Technology, Vol. 18 No. 11, pp. 4-16. https://doi.org/10.1108/eb042665