| abstract |
FIELD: chemistry. n SUBSTANCE: invention relates to an apparatus selected from the group consisting of electric devices and power equipment, comprising a liquid-conductive composition containing a dielectric fluid on ester basis and the additive in a concentration from 3 to 10% by weight of mentioned composition, wherein mentioned additive is dissolved in mentioned dielectric fluid and has a first electron excitation energy in the range of 1 to 4 eV, which is lower than the excitation energy of the first electron of mentioned dielectric fluid, and wherein the additive is selected from the azo compounds of the formula n : n wherein R 5 is selected from phenyl, 2-oxazolyl, 2-thiazolyl and 2-imidazolyl; and R 6 is selected from phenyl and 2-thiazolyl; or from the compounds of the formula n , n where R 1 and R 2 are alkyl chains. The invention also relates to an electrically insulating liquid composition. n EFFECT: used dielectric liquid has a reduced speed of LI streamer. n 5 cl, 3 ex, 4 dwg |