Abstract:
The invention relates to a method for producing a contact piece, for use in a vacuum interrupter chamber, especially in a low, medium or high voltage vacuum interrupter chamber, according to the preamble of claim 1, and to a contact piece for a medium voltage vacuum interrupter chamber according to the preamble of claim 12. The aim of the invention is to improve multi-layer contact systems in such a manner that even larger layer thicknesses can be used to improve the electrical properties. For this purpose, the contact piece is constituted of at least two layers with a solder film inserted thereinbetween, said layers being welded together in a vacuum furnace in a desired relative position to each other. The two-layer structure can also be achieved by a powder layering process. For this purpose, the powder layers are compressed in a compression mold and then sintered in the furnace to give the finished contact piece blank.
Abstract:
The invention relates to a method for producing molded parts for low-voltage, medium-voltage and high-voltage switchgear and to the corresponding switchgear according to the preamble of patent claims 1, 2, 3 and 17. The aim of the invention is to remove the disadvantages mentioned in the description while providing an advantageous method. According to the invention, a mixture of spheres having a defined distribution of diameters of a size Dx are introduced into the casting compound and the components are cast directly.
Abstract:
The invention relates to a medium voltage switchgear assembly which comprises at least one disconnector and whose drive unit is disposed inside or outside a gas chamber according to the generic part of claim 1. In order to further develop a switchgear assembly of the generic type so as to render the same more compact and more functional, the disconnector is embodied as a three-position vacuum chamber switch.
Abstract:
The invention relates to a method for producing molded parts for low-voltage, medium-voltage and high-voltage switchgear and to the corresponding switchgear according to the preamble of patent claims 1, 2, 3 and 17. The aim of the invention is to remove the disadvantages mentioned in the description while providing an advantageous method. According to the invention, a mixture of spheres having a defined distribution of diameters of a size Dx are introduced into the casting compound and the components are cast directly.
Abstract:
The invention relates to a shielding element for the use in medium voltage switchgears with vacuum interrupters with at least two contacts, which are movable along a switching path between closed and open contact position, wherein the shielding element is positioned around the contact position region in the vacuum interrupter, according to claim 1. In order to enhance the energy absorbance behavior of the at least the shielding, at least the inner surface of the shielding is applied with a topographic structure which is a rough at least partly disordered surface structure.
Abstract:
A low- voltage, medium- voltage or high-voltage switchgear assembly with at least one moveable contact piece, in which the moveable contact is connected to a connection piece electrically with a flexible connecting means. In order in this case to produce a connection between the connector strip and the connection piece of the pole part, which connection has an electrical and thermal resistance which is as low as possible, the invention proposes that the flexible connecting means is connected to the connection piece directly or with an intermediate piece, which can be connected to the connection piece, cohesively or at least unreleasably.
Abstract:
The invention relates to a method for production of a contact piece for a switchgear assembly, and to a contact piece itself, as claimed in the preamble of patent claims 1 and 15. In order in this case to introduce the slot and to apply a contact outer contour directly during the powder-metallurgical production process of the contact material, the ivention proposes that contouring, in particular via a thin plastic film, in the form of a slot or slots is introduced into the component and/or into the contact piece and/or into the powder-metal material, which is located in a mold, essentially in a direction parallel to the normal to the surface of the component or contact piece.
Abstract:
The invention relates to a switching device having a vacuum interrupter chamber, in which at least one movable contact piece is arranged according to the preamble of claim 1. In order to considerably increase the switching performance and the dielectric strength, it is proposed according to the invention that two contact arrangements connected in series within a vacuum interrupter chamber are arranged with a total of two disclosed contact surfaces.
Abstract:
The invention relates to a method for producing contact makers for vacuum switching chambers, which are used in low-voltage, medium-high voltage, and high-voltage engineering, during which the contact makers are provided with slots extending from the middle area of the contact to the edge. The invention also relates to the contact maker itself in accordance with the preamble of patent claims 1 and 14. In order to improve a method for producing contact makers in vacuum switching chambers as well as a contact maker of the type in question so that the production method is distinctly less complicated, and the contact maker is sufficient for the highest functional demands, the invention provides that the contact makers are produced in a powder metallurgical process in which they are provided with near final contours and near final dimensions. During this process, said slots are already made in the green compact and are fixed during a subsequent sintering.
Abstract:
The invention relates to a pole part for medium voltage use, with an insulating coverage made of duroplastic or thermoplastic material, and method for manufacture the same, according to the preamble of claims 1 and 4. In order to enhance the manufacture of pole parts, in that way, that the ready pole part could be easier released out of the mould, and additionally that the interface between elements made of different materials are tightly closed, in order to generate reproducable dielectric withstand performance in the manufacture, the transition area between different elements of the pole part are commonly flat in such a way, that rounded edges and/or steps are avoided.