Abstract: A composite insulator includes an insulating elongated core, a protective layer surrounding the elongated core, the protective layer including an outer surface with a shed profile and an adhesive primer layer disposed between the elongated core and the protective layer for adhering the protective layer to the elongated core, the adhesive primer layer including a coupling agent and particles of a low resistivity material. The method for producing a composite insulator includes preparing a first solution including a solvent, a coupling agent and particles of a low resistivity material, applying the first solution on at least a part of an envelope surface of an insulating elongated core and thus forming one or more first adhesive primer layers and applying a protective layer onto the first adhesive primer layer on the elongated core, wherein the protective layer includes an outer surface with a shed profile.

Abstract: A method for controlling personal protective equipment. The method includes positioning of a person equipped with personal protective equipment next to an electrical enclosure, wherein a specific personal protective equipment requirement is defined for the electrical enclosure. The method further includes scanning the personal protective equipment in a contact-less manner while the person is next to the electrical enclosure. Thereby scanned personal protective equipment information are generated. The method further includes comparing the scanned personal protective equipment information with the specific personal protective equipment requirement and evaluating, based on the comparison, whether the personal protective equipment is in accordance with the specific personal protective equipment requirement. The method further includes providing a feedback indicating whether or not the personal protective equipment is in accordance with the specific personal protective equipment requirement.

Abstract: A composite insulator includes an insulating elongated core, a protective layer surrounding the elongated core, the protective layer including an outer surface with a shed profile and an adhesive primer layer disposed between the elongated core and the protective layer for adhering the protective layer to the elongated core, the adhesive primer layer including a coupling agent and particles of a low resistivity material. The method for producing a composite insulator includes preparing a first solution including a solvent, a coupling agent and particles of a low resistivity material, applying the first solution on at least a part of an envelope surface of an insulating elongated core and thus forming one or more first adhesive primer layers and applying a protective layer onto the first adhesive primer layer on the elongated core, wherein the protective layer includes an outer surface with a shed profile.

Abstract: The present disclosure relates to a filled silicone rubber material 2 including at least 20 wt % of alumina tri-hydrate as a filler 4 dispersed in SiR 5 to below the percolation threshold. The ATH is a mixture of a first ATH powder and a second ATH powder. The particle size distribution of the first and second ATH powders are such that the d90 value of the second ATH powder is less than the d10 value of the first ATH powder. The disclosure also relates to an insulator 1 made from the filled SiR material 2, and to a use of the insulator in a high-voltage direct current application.

Abstract: The present disclosure relates to a filled silicone rubber material 2 including at least 20 wt % of alumina tri-hydrate as a filler 4 dispersed in SiR 5 to below the percolation threshold. The ATH is a mixture of a first ATH powder and a second ATH powder. The particle size distribution of the first and second ATH powders are such that the d90 value of the second ATH powder is less than the d10 value of the first ATH powder. The disclosure also relates to an insulator 1 made from the filled SiR material 2, and to a use of the insulator in a high-voltage direct current application.

Abstract: A polymer composition including: a) a polymer matrix; b) a polymeric antioxidant compatible with the polymer matrix, and having pendant phenol antioxidant moieties; and c) a mono- or oligo-functional phenol antioxidant. The invention further discloses film capacitors and power system components having such polymer compositions.

Abstract: Embodiments of the present disclosure provide an electrical insulating material and a method for preparing an electrical insulating element. The electrical insulating material contains matrix component, filler component and liquid hydrophobic component; wherein the matrix component comprises saturated styrenic block copolymer. The electrical insulating material based on saturated styrenic block copolymer has good UV resistivity, tracking and erosion resistance, thermal stability, and lower dielectric constant and dielectric loss. It is also easy and cheap for producing.

Abstract: The invention relates generally to field grading materials and, more particularly, to field grading materials including graphene oxide, reduced graphene oxide, or both, exhibiting non-linear resistivity. In one embodiment, the invention provides a composite material comprising: a polymer material; and reduced graphene oxide distributed within the polymer material.

Abstract: An electrical insulation system includes a first insulation layer having a first polymer and a first filler in the form of nanoparticles, and a second insulation layer including a second polymer and a second filler in the form of either chromium oxide, Cr2O3, iron oxide, Fe2O3, or a mixture of chromium oxide and iron oxide. At least one of the insulation layers is in the form of a solid and flat sheet. An insulation system combining the first insulation layer with well dispersed nanoparticles and the second insulation layer filled with Cr2O3particles and/or Fe2O3 particles.

Abstract: An electrical conductor provided with an electrical insulation system surrounding the conductor, the insulation includes a first insulation layer surrounding the conductor and a second insulation layer surrounding the first insulation layer. The second insulation layer includes a second polymer and a second filler in the form of chromium oxide (Cr2O3), iron oxide (Fe2O3), or a mixture of chromium oxide and iron oxide, wherein the first insulation layer includes a first polymer and a first filler including dispersed nanoparticles.

Abstract: The invention relates generally to field grading materials and, more particularly, to field grading materials including graphene oxide, reduced graphene oxide, or both, exhibiting non-linear resistivity. In one embodiment, the invention provides a composite material comprising: a polymer material; and reduced graphene oxide distributed within the polymer material.

Abstract: An electrical insulation system includes a first insulation layer having a first polymer and a first filler in the form of nanoparticles, and a second insulation layer including a second polymer and a second filler in the form of either chromium oxide, Cr2O3, iron oxide, Fe2O3, or a mixture of chromium oxide and iron oxide. At least one of the insulation layers is in the form of a solid and flat sheet. By an insulation system combining the first insulation layer with well dispersed nanoparticles and the second insulation layer filled with Cr2O3 particles and/or Fe2O3 particles, a synergetic effect of the two insulation layers provides an excellent shield and resistance of the insulation system against electrical discharges. The sheet material allows anybody to put together an insulation system without any special equipment.

Abstract: The invention relates to an electric insulation material including modified nanoparticles, a porous substrate and polymer matrix, wherein the modified nanoparticles include a nanoparticle and a diblock copolymer covalently attached to the nanoparticle, the diblock copolymer including a first block polymer of molecular weight greater than 1000 and a glass transition temperature below room temperature attached to the nanoparticle and a second block polymer of molecular weight greater than 1000 covalently linked to the first block polymer, wherein the second block polymer and the matrix both possess the same chemical functionality. Other electrical insulation materials and methods of making such electrical insulation materials are also disclosed.

Abstract: A high voltage surge arrester, including a varistor element arranged so as to be connected to a high voltage source and to carry a high voltage when being positioned in its operative position, and an electric insulator that encloses and is in contact with the varistor element and forms an outer surface of the apparatus, wherein the electric insulator includes a silicone-based rubber. The silicone based rubber includes particles chosen from the group consisting of Al2O3, BN and ZnO, to such an extent that the thermal conductivity of the silicone-based rubber is equal to or above 0.8 W/mK.

Abstract: An electric insulation device, including a chamber and an electrically insulating element formed by a cast polymer solidified into an elastic state inside the chamber. The electrically insulating element includes a plurality of particles of a ceramic that has a higher thermal conductivity than the one of the polymer.

Abstract: An electrical conductor provided with an electrical insulation system surrounding the conductor, the insulation includes a first insulation layer surrounding the conductor and a second insulation layer surrounding the first insulation layer. The second insulation layer includes a second polymer and a second filler in the form of chromium oxide (Cr2O3), iron oxide (Fe2O3), or a mixture of chromium oxide and iron oxide, wherein the first insulation layer includes a first polymer and a first filler including dispersed nanoparticles.

Abstract: A high voltage surge arrester, including a varistor element arranged so as to be connected to a high voltage source and to carry a high voltage when being positioned in its operative position, and an electric insulator that encloses and is in contact with the varistor element and forms an outer surface of the apparatus, wherein the electric insulator includes a silicone-based rubber. The silicone based rubber includes particles chosen from the group consisting of Al2O3, BN and ZnO, to such an extent that the thermal conductivity of the silicone-based rubber is equal to or above 0.8 W/mK.

Abstract: The invention relates to an electric insulation material including modified nanoparticles, a porous substrate and polymer matrix, wherein the modified nanoparticles include a nanoparticle and a diblock copolymer covalently attached to the nanoparticle, the diblock copolymer including a first block polymer of molecular weight greater than 1000 and a glass transition temperature below room temperature attached to the nanoparticle and a second block polymer of molecular weight greater than 1000 covalently linked to the first block polymer, wherein the second block polymer and the matrix both possess the same chemical functionality. Other electrical insulation materials and methods of making such electrical insulation materials are also disclosed.

Abstract: A high temperature vulcanized silicone rubber is disclosed and includes a high temperature vulcanized silicone rubber as a silicone base and melamine cyanurate as a filler and at least one inorganic filler which is different from melamine cyanurate, and optionally further additives. A total filler content can be within a range of 40 parts (by weight) to 230 parts (by weight) per 100 parts (by weight) of silicone base; wherein (i) the melamine cyanurate is present within a range of 2 parts (by weight) to 40 parts (by weight) per 100 parts (by weight) of silicone base; and (ii) the at least one inorganic filler is an electrical insulator.

Abstract: An electric insulation device, including a chamber and an electrically insulating element formed by a cast polymer solidified into an elastic state inside the chamber. The electrically insulating element includes a plurality of particles of a ceramic that has a higher thermal conductivity than the one of the polymer.