Abstract: Polymer concrete electrical insulation including a hardened epoxy resin composition filled with an electrically non-conductive inorganic filler compositions. The polymer concrete electrical insulation system optionally may contain additives. The epoxy resin composition is based on a cycloaliphatic epoxy resin. The inorganic filler composition can be present within the range of about 76% by weight to about 86% by weight, calculated to the total weight of the polymer concrete electrical insulation system. The inorganic filler composition includes a uniform mixture of (i) an inorganic filler with an average grain size within the range of 1 micron (?m) to 100 micron (?m) [component c(i)], and (ii) an inorganic filler with an average grain size within the range of 0.1 mm (100 micron) to 2 mm [component c(ii)].

Abstract: A high-voltage insulator includes a metal armature, an insulating tube joined to the metal armature, which is adhesively bonded to the metal armature at an end formed as a supporting ring, and an axially symmetrical adhesive-bonding joint disposed around the axis of the insulating tube. An annular grove, which is formed in the metal armature, is disposed around the axis of the insulating tube and receives an end portion of the supporting ring. Sealing surfaces are respectively formed in the groove and in the supporting ring. The sealing surfaces are arranged and formed in such a way that, when the insulating tube and the metal armature are joined, they slide on one another, thereby forming a seal, and the supporting ring acting as a displacement body presses adhesive that has been introduced into the groove before the joining into the adhesive-bonding joint.

Abstract: A high-voltage insulator includes a metal armature, an insulating tube joined to the metal armature, which is adhesively bonded to the metal armature at an end formed as a supporting ring, and an axially symmetrical adhesive-bonding joint disposed around the axis of the insulating tube. An annular grove, which is formed in the metal armature, is disposed around the axis of the insulating tube and receives an end portion of the supporting ring. Sealing surfaces are respectively formed in the groove and in the supporting ring. The sealing surfaces are arranged and formed in such a way that, when the insulating tube and the metal armature are joined, they slide on one another, thereby forming a seal, and the supporting ring acting as a displacement body presses adhesive that has been introduced into the groove before the joining into the adhesive-bonding joint.

Abstract: Polymer concrete electrical insulation including a hardened epoxy resin composition filled with an electrically non-conductive inorganic filler compositions. The polymer concrete electrical insulation system optionally may contain additives. The epoxy resin composition is based on a cycloaliphatic epoxy resin. The inorganic filler composition can be present within the range of about 76% by weight to about 86% by weight, calculated to the total weight of the polymer concrete electrical insulation system. The inorganic filler composition includes a uniform mixture of (i) an inorganic filler with an average grain size within the range of 1 micron (?m) to 100 micron (?m) [component c(i)], and (ii) an inorganic filler with an average grain size within the range of 0.1 mm (100 micron) to 2 mm [component c(ii)].

Abstract: An exemplary isolating tube, and production method thereof, includes a mechanically load-bearing plastic tube composed of a fiber-reinforced polymer for use in a cooling element which can be loaded with high voltage, during whose operation the isolating tube forms an electrical isolation gap and in the tube interior carries an agent which flows as a liquid and/or vapor. The isolating tube can have a diffusion barrier which is held coaxially by the plastic tube. Such an isolating tube can be produced using an exemplary novel method for production.

Abstract: The shaft includes two electrically conducting connecting pieces (2, 3), which can be connected to different electric potentials, and also an insulating tube (4), which can be subjected to torsional loading. The two connecting pieces (2, 3) are respectively fastened to one of the two ends of the insulating tube (4). In order that the shaft can also transmit great torques, the following means are provided for fastening at least one of the two connecting pieces (2, 3): An adhesive joint (5), which is formed by a cone (6) formed into one end of the insulating tube (4) and made to run from the circumferential surface (7) to the inner surface (8) of the insulating tube (4) and also by a mating cone (9) formed into the at least one connecting piece (2, 3), and by a gap (10) formed by the cone (6) and mating cone (9) and filled with adhesive.

Abstract: An insulating part (20) is provided for a high voltage switch of a metal-enclosed circuit-breaker system and is executed as a pressure-gelated casting on the base of a polymeric composite material. It comprises a base-plate (21) with a centrally arranged large through-hole (23) for receiving a current terminal lead of the high voltage switch and with small through-holes (24, 25) for receiving fastening screws. The insulating part further comprises two bearing blocks (22) for receiving a shaft of a movable contact of a contact arrangement of the switch and at least a first collar (26) which surrounds the large through-hole (23). For reason of the execution as a pressure-gelated casting the insulating part (20) can be manufactured easily with low costs but with high precision. In general a finish-maching of the casting is not required.

Abstract: A high-voltage insulator contains, in a coaxial arrangement: an insulating tube with an end in the form of a bearing ring, a hollow metal armature held on the bearing ring, an adhesive-bonding joint, which is provided between an adhesive-bonding area of the bearing ring and an adhesive-bonding area of the metal armature and is filled in a vacuum-tight manner with a cured adhesive layer, and a cavity, which is extended along the axis of the insulating tube and is radially delimited by the insulating tube and the metal armature. At least one predominantly radially guided adhesive channel is arranged between the cavity and the adhesive-bonding joint, which adhesive channel is sealed with cured adhesive and has a cross section which is sufficient for guiding uncured adhesive from the cavity into the adhesive-bonding joint prior to the formation of the cured adhesive layer.

Abstract: An insulating part (20) is provided for a high voltage switch of a metal-enclosed circuit-breaker system and is executed as a pressure-gelated casting on the base of a polymeric composite material. It comprises a base-plate (21) with a centrally arranged large through-hole (23) for receiving a current terminal lead of the high voltage switch and with small through-holes (24, 25) for receiving fastening screws. The insulating part further comprises two bearing blocks (22) for receiving a shaft of a movable contact of a contact arrangement of the switch and at least a first collar (26) which surrounds the large through-hole (23). For reason of the execution as a pressure-gelated casting the insulating part (20) can be manufactured easily with low costs but with high precision. In general a finish-maching of the casting is not required.

Abstract: The bushing has a conductor and a core surrounding the conductor. The core comprises a sheet-like spacer, wherein the spacer contains filler particles. The bushing can be a resin-impregnated graded bushing impregnated with an electrically insulating matrix material. The spacer may comprise paper, in particular creped paper. The filler particles can be electrically insulating or semiconductive particles. An increased thermal conductivity of the core can be achieved.

Abstract: An isolating tube is disclosed having a mechanically load-bearing plastic tube composed of a fiber-reinforced polymer for use in a cooling element which can be loaded with high voltage, during whose operation the isolating tube forms an electrical isolation gap and in the tube interior carries an agent which flows as a liquid and/or vapor. The isolating tube has a diffusion barrier which is held coaxially by the plastic tube. Methods for production of the isolating tube are disclosed.

Abstract: The shaft includes two electrically conducting connecting pieces (2, 3), which can be connected to different electric potentials, and also an insulating tube (4), which can be subjected to torsional loading. The two connecting pieces (2, 3) are respectively fastened to one of the two ends of the insulating tube (4). In order that the shaft can also transmit great torques, the following means are provided for fastening at least one of the two connecting pieces (2, 3): An adhesive joint (5), which is formed by a cone (6) formed into one end of the insulating tube (4) and made to run from the circumferential surface (7) to the inner surface (8) of the insulating tube (4) and also by a mating cone (9) formed into the at least one connecting piece (2, 3), and by a gap (10) formed by the cone (6) and mating cone (9) and filled with adhesive.

Abstract: This hybrid circuit breaker has at least two series-connected arcing chambers which are operated by a common drive or by separate drives and are filled with different arc extinguishing media. Means are provided which ensure a sensible voltage distribution between the first and the second arcing chamber in the course of a switching process. At least one vacuum switching chamber having an insulating housing, is provided as the second arcing chamber. The aim is to provide a hybrid circuit breaker wich can be produced economically and which has high availability. This is achieved, inter alia, in that means are provided which ensure that the movement of the contacting arrangement of the first arcing chamber precedes the movement of the contact arrangement of the second arcing chamber during a disconnection process, and that the movement of the contacting arrangement of the second arcing chamber precedes the movement of the contact arrangement of the first arcing chamber during a connection process.

Abstract: This hybrid circuit breaker has at least two series-connected arcing chambers which are operated by a common drive or by separate drives and are filled with different arc extinguishing media. Means are provided which ensure a sensible voltage distribution between the first and the second arcing chamber in the course of a switching process. At least one vacuum switching chamber, having an insulating housing (46), is provided as the second arcing chamber. The aim is to provide a hybrid circuit breaker which can be produced economically and which has high availability. This is achieved, inter alia, in that means are provided which always ensure that the movement of the first arcing chamber leads the movement of the second arcing chamber during a disconnection process, and that the movement of the second arcing chamber always leads the movement of the first arcing chamber during a connection process.

Abstract: The stock contains an insulating-material matrix and a filler embedded in the matrix and is distinguished by a cellular structure. The predominant portion of the cells is filled with a material having arc-extinguishing properties or contains a material which, on exposure to an arc, forms arc-extinguishing gas. For the purpose of improving the making and breaking capacity, such a stock can advantageously be employed in a gas-blast circuit breaker in which arc-extinguishing gas is blown onto the switching arc. This involves the stock preferably being positioned at such points guiding the arc-extinguishing gas, at which the stock is exposed to the radiation of the arc and the thermal action of arc gases.

Abstract: The post insulator (6) has an insulator body (8), of cured cast resin, which can be subjected to a pressure medium, and at least one potted fitting (11) penetrating the insulator body (8) and subjected to high voltage. The metallic support body (12) has a lateral surface (15). The intention is to obtain a post insulator which is of simple structure and which is designed for comparatively high mechanical loading. This is achieved by providing the lateral surface (15) of the support body (12) with a bonding layer (13) which adheres better to the lateral surface (15) than the cured cast resin. The cured cast resin is cross-linked with the bonding layer (13).

Abstract: An electrical insulator including a thermosetting matrix and a filler composed primarily of powdered material embedded in the thermosetting matrix. The insulator has a high service life in spite of severe mechanical stressing at temperatures of up to 105.degree. C. This is achieved as a result of the thermosetting matrix having a glass transition temperature exceeding 140.degree. C. and the inclusion of a powdered filler, which has a reduced rigidity compared with the thermosetting matrix, embedded in the thermosetting matrix.