The present invention refers to a structure comprising a biaxially oriented polypropylene (BOPP) film having at least one layer comprising a homopolymer of propylene which layer is in contact with an oil phase, the homopolymer of propylene has a) a content of isotactic pentads in the range from 95% to 98%, and b) a content of ash of not more than 30 ppm, based on the total weight of the homopolymer of propylene, characterized in that the oil phase has an absorbance value of ≤0.1, relative to the pure oil, as determined spectrophotometrically at a wavelength of 860 nm by the reduction of transmitted light intensity. The present invention further refers to the use of a biaxially oriented polypropylene (BOPP) film for making capacitors comprising said structure, wherein the oil phase has an absorbance value of ≤0.1, relative to the pure oil, as determined spectrophotometrically at a wavelength of 860 nm by the reduction of transmitted light intensity as well as the use of the homopolymer of propylene for increasing the life time of a capacitor.

The present invention refers to a structure comprising a biaxially oriented polypropylene (BOPP) film having at least one layer comprising a homopolymer of propylene which layer is in contact with an oil phase, the homopolymer of propylene has a) a content of isotactic pentads in the range from 95% to 98%, and b) a content of ash of not more than 30 ppm, based on the total weight of the homopolymer of propylene, characterized in that the oil phase has an absorbance value of ≤0.1, relative to the pure oil, as determined spectrophotometrically at a wavelength of 860 nm by the reduction of transmitted light intensity. The present invention further refers to the use of a biaxially oriented polypropylene (BOPP) film for making capacitors comprising said structure, wherein the oil phase has an absorbance value of ≤0.1, relative to the pure oil, as determined spectrophotometrically at a wavelength of 860 nm by the reduction of transmitted light intensity as well as the use of the homopolymer of propylene for increasing the life time of a capacitor.

The disclosure provides a chemical reduction of a metal in a cable of an electrical network, which brings about an improvement in the conductive properties of said metal and a reduction in losses during electric power transmission. The invention discloses a reducing compound with a high concentration of quasi-free electrons, which is obtained as a result of the solvation of metals selected from group I and group II of the main group of the periodic table of elements and of amines selected from the group consisting of: pyridine, and dimethylformamide dispersed in a liquid oligomer, with a metal:amine:dielectric molar ratio of 1:2:1.5, allowing, in an alternating electromagnetic field, to initiate a pulsed injection of electrons into the network with a periodicity equal to frequency of alternation of the voltage.

A parallel plate capacitor including a cathode core that further includes a pair of parallel electrodes and a dielectric material layer positioned between the pair of parallel electrodes. The capacitor also includes a dielectric liquid medium, where the cathode core is at least partially submerged in the dielectric liquid medium.

A parallel plate capacitor including a cathode core that further includes a pair of parallel electrodes and a dielectric material layer positioned between the pair of parallel electrodes. The capacitor also includes a dielectric liquid medium, where the cathode core is at least partially submerged in the dielectric liquid medium.

A multi-material electrode device is disclosed. The multi-material electrode device includes a first electrode, a dielectric material coupled to the first electrode, and a second electrode coupled to the dielectric material. In the multi-material electrode device, the first electrode and the second electrode do not include the same material.

A power capacitor includes a body that defines an interior space; and at least one capacitive device in the interior space. The capacitive device includes a first electrode; and a second electrode separated from the second electrode. The power capacitor also includes a dielectric nanofluid in the interior space and between the first electrode and the second electrode, the dielectric nanofluid including: a base dielectric fluid; and nanoparticles dispersed in the base dielectric fluid.

A capacitor insulation system is disclosed in the present application. The insulation system includes a dielectric fluid containing a first voltage stabilizing additive of a first concentration. The insulation system further includes a dielectric film containing the first voltage stabilizing additive of a second concentration and impregnated in the dielectric fluid. The first concentration is greater than the second concentration. The insulation system prepared according to the present disclosure can provide an increased and quite stable dielectric strength.

A capacitor insulation system is disclosed in the present application. The insulation system includes a dielectric fluid containing a first voltage stabilizing additive of a first concentration. The insulation system further includes a dielectric film containing the first voltage stabilizing additive of a second concentration and impregnated in the dielectric fluid. The first concentration is greater than the second concentration. The insulation system prepared according to the present disclosure can provide an increased and quite stable dielectric strength.

A capacitor assembly and a method of assembling a capacitor assembly are provided. The capacitor assembly has at least two capacitor stacks, which have a layer structure including a top layer and a bottom layer. A support assembly supports the capacitor stacks. The capacitor stacks are stacked on top of each other in the support assembly. The support assembly has a compression member which compresses the at least two capacitor stacks in a direction substantially perpendicular to the layer structure. A pressure distribution arrangement adjusts the distribution of the pressure applied to the capacitor stacks by the compression member.