An impregnating resin, e.g., a catalytically hardenable impregnating resin for the conductor of an electrical machine, may include at least one reactive resin mixed with at least one reactive diluent and a hardening catalyst, e.g., for cationic, anionic or coordinate polymerization of the impregnating resin. The properties of the impregnating resin or use thereof may be improved by virtue of the reactive diluent containing a heterocyclic four-membered ring. The impregnating resin may be part of a main insulation of a conductor arrangement, which may in turn be installed in an electrical coil or other electrical machine.

An internal combustion engine ignition coil according to the present invention includes: a central iron core; a primary coil disposed on an outer circumference of the central iron core; a secondary coil disposed on an outer circumference of the primary coil; a side iron core disposed on an outer circumference of the secondary coil; and an insulating material sealing the central iron core, the primary coil, and the secondary coil on an inner side of the side iron core. A first layered silicate having a particle diameter less than a winding diameter of the secondary coil is present at a higher concentration in a vicinity of the secondary coil than that in a vicinity of the side iron core in the insulating material. A second layered silicate having a particle diameter greater than the winding diameter of the secondary coil is present at a higher concentration than that of the first layered silicate between the outer circumference side of the secondary coil and the side iron core. The second layered silicate has an aspect ratio of 50 or more, the aspect ratio being a ratio of a long side of a particle of the layered silicate to a thickness of the particle.

An insulating material and its method of use of insulating material for rotating machines such as motors and generators. The insulating material includes a resin embedded with a filler that is not based only on a monomodal nanoparticle size particle distribution. Radiation erodes the material and is conductive to the formation of in situ protective layers on the body to be insulated.

An insulating material and its method of use of insulating material for rotating machines such as motors and generators. The insulating material includes a resin embedded with a filler that is not based only on a monomodal nanoparticle size particle distribution. Radiation erodes the material and is conductive to the formation of in situ protective layers on the body to be insulated.

A cable assembly for a flame sensor apparatus includes an inner conductor electrically connected to a photodiode that generates a current. The inner conductor transmits the current from the photodiode. A first insulating layer circumferentially surrounds the inner conductor. The first insulating layer includes a mineral insulation material. An inner sheath circumferentially surrounds the first insulating layer. The inner sheath includes an electrically conductive material. A second insulating layer circumferentially surrounds the inner sheath. The second insulating layer includes a mineral insulation material. An outer sheath circumferentially surrounds the second insulating layer. The outer sheath includes an electrically conductive material. The cable assembly is for use in temperatures up to about 300 degrees Celsius or greater. A method of attaching a cable assembly for a flame sensor apparatus.

A cable assembly for a flame sensor apparatus includes an inner conductor electrically connected to a photodiode that generates a current. The inner conductor transmits the current from the photodiode. A first insulating layer circumferentially surrounds the inner conductor. The first insulating layer includes a mineral insulation material. An inner sheath circumferentially surrounds the first insulating layer. The inner sheath includes an electrically conductive material. A second insulating layer circumferentially surrounds the inner sheath. The second insulating layer includes a mineral insulation material. An outer sheath circumferentially surrounds the second insulating layer. The outer sheath includes an electrically conductive material. The cable assembly is for use in temperatures up to about 300 degrees Celsius or greater. A method of attaching a cable assembly for a flame sensor apparatus.

A nonlinear resistive coating material 20 in an embodiment includes: a matrix resin 22 made of an epoxy resin which is cured by adding a curing agent thereto; ZnO-containing particles 21 dispersedly contained in the matrix resin 22 and made of a sintered compact containing ZnO as a main component; and semiconductive surface-treated whiskers 10 dispersedly contained in the matrix resin 22 and made of ZnO subjected to titanate coupling surface modification treatment.

A nonlinear resistive coating material 20 in an embodiment includes: a matrix resin 22 made of an epoxy resin which is cured by adding a curing agent thereto; ZnO-containing particles 21 dispersedly contained in the matrix resin 22 and made of a sintered compact containing ZnO as a main component; and semiconductive surface-treated whiskers 10 dispersedly contained in the matrix resin 22 and made of ZnO subjected to titanate coupling surface modification treatment.

The invention relates to an electrical device (1, 20, 30) comprising a semi-conductive cross-linked layer (3, 4, 5, 21, 22, 23, 31, 32) produced from a polymer composition comprising: at least one polymer A comprising at least one epoxy function, and a cross-linking agent B comprising at least one reactive function that can react with the epoxy function of said polymer A in order to allow the cross-linking of said polymer A, characterised in that the polymer composition also comprises an electrically conductive filler having a specific surface area BET of at least 100 m2/g according to the ASTM standard D 6556.

The invention relates to an electrical device (1, 20, 30) comprising a semi-conductive cross-linked layer (3, 4, 5, 21, 22, 23, 31, 32) produced from a polymer composition comprising: at least one polymer A comprising at least one epoxy function, and a cross-linking agent B comprising at least one reactive function that can react with the epoxy function of said polymer A in order to allow the cross-linking of said polymer A, characterised in that the polymer composition also comprises an electrically conductive filler having a specific surface area BET of at least 100 m2/g according to the ASTM standard D 6556.