Electrical energy storage device (1), including at least one electrical component (2) and a busbar (5) for electrical power distribution, where the electrical component (2) is arranged on the busbar (5), and at least a first contact side (11) and/or a second contact side (12) of the electrical component (2) is connected to the busbar (5) by a contact element (8), and wherein the contact element (8) is formed at least partially as a mesh (7). The electrical component (2) is preferably 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 capacitor component includes a lamination portion in which first and second internal electrodes are disposed to face each other in a first direction and separated from each other by a dielectric layer, and a body comprising the lamination portion and first and second connection portions disposed on both sides of the lamination portion in a second direction, perpendicular to the first direction, and connected to the first and second internal electrodes. The first and second connection portions each include a metal layer including nickel and disposed on the lamination portion and a ceramic layer disposed on the metal layer, and an average thickness of each of the first and second internal electrodes is 0.4 μm or less.

A capacitor component includes a lamination portion in which first and second internal electrodes are disposed to face each other in a first direction and separated from each other by a dielectric layer, and a body comprising the lamination portion and first and second connection portions disposed on both sides of the lamination portion in a second direction, perpendicular to the first direction, and connected to the first and second internal electrodes. The first and second connection portions each include a metal layer including nickel and disposed on the lamination portion and a ceramic layer disposed on the metal layer, and an average thickness of each of the first and second internal electrodes is 0.4 μm or less.

A method for the assembly of a metal part and a ceramic part, including the following steps: supplying a solid ceramic part of the alumina type; supplying a solid metal part, the metal being selected from platinum and tantalum, or an alloy including a majority of one of these metals; depositing at least one layer, called interface layer, on at least one of the solid parts, the interface layer containing magnesium oxide; bringing into contact the solid metal part and the solid ceramic part such that the interface layer is located between the solid parts; and hot densification under pressure of the solid parts brought into contact, to create a close bond between the solid parts and form a spinel from the interface layer. An electrical device, such as a capacitive sensor having a sensitive part produced according to the present method, is also provided.

A non-contact AC voltage measurement device 100 applied to a conductor 12 of an electric wire 16, the device 100 being characterized in that a first electrode 32 is provided outside the electric wire 16, whereby a coupling capacitance 34 is formed between the conductor 12 and the first electrode 32, a parallel circuit 38 having a capacitor 40 and an opening/closing means 50 connected in parallel to the capacitor 40 is provided, the parallel circuit is connected in series to the coupling capacitance, and a first current I.sub.1 which flows through the parallel circuit 38 when the opening/closing means 50 of the parallel circuit 38 is closed and a second current I.sub.2 which flows through the parallel circuit 38 when the opening/closing means 50 is open are measured for the purpose of measuring the AC voltage 8 applied to the conductor 12.

A voltage division device includes a core region with a capacitor arrangement arranged in the core region and an electrical resistor arranged in the core region. A first electrode of the capacitor arrangement has a coupling member for connection with a voltage-carrying element, and a second electrode of the capacitor arrangement has a grounding member for connection with a grounding element. The first electrode and the second electrode are connected in an electrically conductive manner via the electrical resistor. The first electrode and the second electrode include multiple electrically conductive, substantially finger-shaped or rod-shaped modulation elements. arrangement of such a voltage division device on a connecting part of switchgear of a power grid is further provided.

A voltage division device includes a core region with a capacitor arrangement arranged in the core region and an electrical resistor arranged in the core region. A first electrode of the capacitor arrangement has a coupling member for connection with a voltage-carrying element, and a second electrode of the capacitor arrangement has a grounding member for connection with a grounding element. The first electrode and the second electrode are connected in an electrically conductive manner via the electrical resistor. The first electrode and the second electrode include multiple electrically conductive, substantially finger-shaped or rod-shaped modulation elements. arrangement of such a voltage division device on a connecting part of switchgear of a power grid is further provided.

Polyphase electrical machine with n phases, n≥3, including a casing defining a longitudinal axis, a stator and a rotor including a mechanical drive shaft, the electrical machine being equipped with a power electronics and a coolant circuit and the power electronics is formed of n power electronic modules evenly distributed over an inner circumference of a longitudinal extension of the casing whose outer circumference is covered with a single annular DC bus decoupling capacitor electrically connected to the n power electronic modules, the coolant circuit including a plurality of U-shaped tubes with a tubular outgoing part extending over an entire length of the casing and including the longitudinal casing extension and a shorter tubular return part, extending over a casing length excluding the longitudinal casing extension.

Polyphase electrical machine with n phases, n≥3, including a casing defining a longitudinal axis, a stator and a rotor including a mechanical drive shaft, the electrical machine being equipped with a power electronics and a coolant circuit and the power electronics is formed of n power electronic modules evenly distributed over an inner circumference of a longitudinal extension of the casing whose outer circumference is covered with a single annular DC bus decoupling capacitor electrically connected to the n power electronic modules, the coolant circuit including a plurality of U-shaped tubes with a tubular outgoing part extending over an entire length of the casing and including the longitudinal casing extension and a shorter tubular return part, extending over a casing length excluding the longitudinal casing extension.