Abstract: An electrical apparatus including a coil, at least one composition including at least one dielectric fluid, preferably a dielectric liquid, and at least one material in gelled form, which are arranged inside the cavity of a housing, and wherein the ratio between the maximum volume occupied by the material in gelled form and the total volume of the cavity is less than 50%. Also, the use of a material in gelled form to prevent and/or minimize leaks of a composition including at least one dielectric fluid within an electrical apparatus, in particular a transformer or a capacitor.

Abstract: The present invention relates to the use of a, preferably single-phase, heat transfer composition, comprising at least one aromatic synthetic dielectric fluid chosen from alkylbenzenes, alkyldiphenylethanes, alkylnaphthalenes, methylpolyarylmethanes, and mixtures thereof, for regulating the temperature of a battery. The present invention also relates to a battery comprising such a heat transfer composition.

Abstract: The present invention relates to the use, for the retrofilling of a transformer, of at least one dielectric fluid of general formula (1): (A?X)n?B??(1) in which A and B, which are identical or different, represent, independently of each other, an optionally substituted aromatic ring, X represents a spacer group and n represents 0, 1, 2 or 3. The invention also relates to a transformer containing at least one dielectric fluid of general formula (1) and an amount of PCBs of less than 20%.

Abstract: The present invention relates to the use, for increasing the power of a transformer, of at least one dielectric fluid of general formula (1): (A-X)n-B??(1) in which A and B, which are identical or different, represent, independently of each other, an optionally substituted aromatic ring, X represents a spacer group and n represents 0, 1, 2 or 3. The invention also relates to a transformer containing at least one dielectric fluid of general formula (1).

Abstract: A composition including: (a) from 30 to 70% by weight of a mixture of benzyltoluene and dibenzyltoluene, and (b) from 70 to 30% by weight of at least one compound chosen from the C4-C8 aromatic compounds enclosing two benzene rings condensed or bonded to each other by a bond or by a spacer group other than —CH2-, the oligomers of same and the mixtures of same, excluding phenylxylylethane. Also, the use of this composition, with or without phenylxylylethane, depending on the case, as a dielectric and/or heat-transfer fluid, in particular in use conditions at very low temperatures, such as temperatures lower than ?40° C., or indeed lower than ?60° C. Also, mixtures of these compositions with mineral oils and/or natural or synthetic esters. Finally, devices, in particular electrical devices, incorporating this composition.

Abstract: A composition including: (a) from 30 to 70% by weight of a mixture of benzyltoluene and dibenzyltoluene, and (b) from 70 to 30% by weight of at least one compound chosen from the C4-C8 aromatic compounds enclosing two benzene rings condensed or bonded to each other by a bond or by a spacer group other than —CH2-, the oligomers of same and the mixtures of same, excluding phenylxylylethane. Also, the use of this composition, with or without phenylxylylethane, depending on the case, as a dielectric and/or heat-transfer fluid, in particular in use conditions at very low temperatures, such as temperatures lower than ?40° C., or indeed lower than ?60° C. Also, mixtures of these compositions with mineral oils and/or natural or synthetic esters. Finally, devices, in particular electrical devices, incorporating this composition.