Abstract: A flange fitted around a round cylindrical condenser core of a bushing is described. The flange comprises an annular lower flange part arranged to fit around a radial shoulder of the condenser core such that a lower shoulder chamfer of the shoulder rests against lower flange chamfer of the lower flange part around the circumference of the condenser core; and an annular upper flange part fastened to the lower flange part and fits around the condenser core above an upper shoulder chamfer of the shoulder. An upper flange chamfer of the upper flange part is between an upper sealing element and a lower sealing element, forming an annular chamfer space is formed between the upper flange chamfer and the upper shoulder chamfer between the upper and lower sealing elements. The flange comprises an injection through hole for a filler material to be injected there through to fill the chamfer space.

Abstract: A cable leadthrough device for leading a cable through an opening in a wall, having a housing that can be fastened in the area of the opening, wherein the cable can be led through the housing along a leadthrough channel parallel to a leadthrough axis, and also having a strain relief device—with at least one clamping element for clamping a cable led through the leadthrough channel, wherein the clamping element is mounted so as to be movable on the housing, by a guide device, along a guide axis inclined in relation to the leadthrough axis, between a clamping position, in which it radially narrows the leadthrough channel, and a release position, in which it releases the leadthrough channel, and a force application system being provided for generating a driving force with a force component that acts along the guide axis and pushes the clamping element towards its clamping position.

Abstract: An arrester for lightning protection of electrical equipment or power transmission lines is disclosed. The arrester comprises an insulating body made of a dielectric and five or more electrodes mechanically connected to the insulating body and arranged to allow the formation of an electric discharge between adjacent electrodes under the influence of lightning overvoltage. The electrodes are located inside the insulating body and separated from its surface by a layer of insulation. Adjacent electrodes exit into discharge chambers having outlets to the surface of the insulating body. At least a part of the discharge chambers is provided with pressurizing chambers located near the electrodes and connected to the discharge chambers through the discharge gaps between adjacent electrodes.

Abstract: A clamping insulator for securing electrical wires to support structures comprising an insulating second clamp member, and an insulating first clamp member that is hingebly connected to the insulating second clamp member and an eyebolt, wherein the hinge is positioned at an angle relative to the electrical wire, the first clamp member is simply flipped over upon the second clamp member to secure the wire in place, the eyebolt both secures the first and second clamp members in the closed position and allows easy access for a lineman with a hot stick, and, in the closed position, the eyebolt is positioned at a compound angle relative to the ground and supporting structure it sits upon to provide easy access for a hot stick.

Abstract: A cable support device includes a body having a first bracket and a cap having a first hinge. The cable support device further includes a transition piece disposed between the body and the cap. The transition piece includes an integrally formed body portion and oppositely-facing cap portion. The body portion has an inner surface defining a body portion groove extending longitudinally from a first end to an opposite end of the body portion. The body portion further includes a second bracket. The cap portion has an inner surface defining a cap portion groove extending longitudinally from a first end to an opposite end of the cap portion. The cap portion further includes a second hinge.

Abstract: A stringing messenger clamp for use in overhead transmission and distribution systems and method of installing a messenger cable is provided. The stringing messenger clamp includes a bracket and an assembly body supported by the bracket, wherein the assembly body has a cable channel sized to receive a portion of a messenger cable. An assembly clamp is movable with respect to the assembly body and closable upon the cable channel. When the assembly clamp is in a closed position, it retains in place the portion of the messenger cable within the cable channel.

Abstract: A spout assembly is provided. The spout assembly includes a spout and a spout base. The spout base has a cross-sectional area that is smaller than a spout sized to enclose an electrical switching apparatus electrical coupling. That is, the spout base includes a CT support surface with a cross-sectional area that is smaller than the spout cross-sectional area. Current transformers are disposed upon the spout base CT support surface.

Abstract: An electrical bushing for providing electrical insulation of a conductor extending through the bushing is disclosed. The bushing includes: one conductive foil concentrically arranged around the conductor location; and one FGM part, made from a field grading material and partly arranged in the extension of part of a foil edge of a conductive foil. The FGM part and the conductive foil, in the extension of which the FGM part is arranged, are in electrical contact.

Abstract: A direct current cable termination apparatus for terminating a high voltage direct current cable, the apparatus includes a current-carrying device including a terminal portion of the direct current cable, the cable including an electrical conductor, a electrically insulating layer located outside of the electrical conductor, and a conductive shield located outside of the insulating layer and the electrical conductor; and a housing including a tubular outer shell with an inner periphery and formed by an electrically insulating and polymer-containing material. The current-carrying device is adapted to extend in the axial direction of the outer shell. Along at least a part of the axial extension of the current-carrying device the outer shell extends axially with a space between its inner periphery and the current-carrying device. The housing is adapted to separate the space from an atmosphere outside the outer shell, and the space is filled with an electrically insulating fluid.

Abstract: A corona resistant high voltage bushing assembly includes an insulating sleeve to surround a conductor, a flange located on an outside surface of the insulating sleeve, and a first band of semiconductive glaze located on the outer surface of the insulating sleeve spaced apart from an end of the insulating sleeve.

Abstract: A high voltage bushing assembly includes an insulating sleeve which is made of high strength alumina porcelain to surround a conductor, a flange located on an outside surface of the insulating sleeve, and a band of semiconductive glaze located on the outer surface of the insulating sleeve spaced apart from an end of the insulating sleeve.

Abstract: An attachment system for cables (7), in particular for wind turbines, has a base body (1, 3) securable to a support structure and forming cable bushings (5) with openings for cables (7). The openings can be closed by a cover (17) applying retaining forces to the cables (7). The cable bushings (5) on the base body (1, 3) are arranged at least over part of a ring, with an outside opening. The cover (17) has retaining bodies lockable to the base body (1, 3) for preliminary fixing of the cables (7) inserted into the cable bushings (5) and a tightening strap (17) encompassing the base body (1, 3) and applying retaining forces to the cables (7) via the retaining bodies.

Abstract: The invention relates to a high voltage device for providing electrical insulation of a conductor extending through the device. The device includes a hollow insulator; a conductor extending through the hollow insulator; a field gradient decreasing arrangement including a condenser core and a voltage grading shield. The condenser core and the voltage grading shield are arranged around the conductor inside the hollow insulator in a manner so that the voltage grading shield is arranged around at least part of the condenser core.

Abstract: The disclosure relates to an insulator for positioning an electrical conductor in a gas chamber in a housing of a gas-insulated switchgear assembly, which comprises an electrically insulating disc-shaped carrier element with at least one cutout for passing through an electrical conductor. At least one notch for accommodating a clamp element is arranged on the outer circumference of the carrier element at least one point.

Abstract: An electric insulation arrangement including a field grading material including a matrix including a dielectric material. A plurality of micro varistor particles is distributed in the matrix. A plurality of bridge particles include an electrically conducting material and form electrically conducting bridges between individual micro varistor particles. The bridge particles form a percolating network together with the micro particles but do not form a percolating network by interconnection between themselves.

Abstract: An integrated insulator sealing and shielding assembly includes a rubber housing having a plurality of radial weathersheds and a tapered end adjacent an endmost radial weathershed. A metal fitting is disposed adjacent to the endmost radial weathershed and receives the tapered end. A collar assembly is disposed at an upper end of the metal fitting and includes two apertures between an outer surface thereof and the rubber housing for receiving a sealant. At least one sealing surface, preferably four, is disposed between the collar assembly and a bottom end of the rubber housing for securing the connection therebetween.

Abstract: A high voltage bushing including a voltage grading shield in two parts.

Abstract: Device for the protection from effects of an electric field, of the metal parts of chains of insulators of already mounted and operational high-voltage transmission lines includes: a fastening/support plate; anchoring elements to anchor the plate to the suspension yoke of the conductors of the transmission line, the anchoring elements being adjustably mounted on the plate according to at least two degrees of freedom; and at least one guard ring, which may be anchored on the plate with fastening elements. The plate has an upturned-U cross-section and its upper surface is formed by geometrically coupling with the lower surface of the suspension yoke. The anchoring elements include a pair of arms articulately, mounted on the plate; such articulation including, for each arm, a pin pivotally, mounted within seats formed in the plate perpendicularly to the longitudinal axis thereof, and a pair of holes running through the pin.

Abstract: An improved apparatus for deconcentrating an electric field, surrounding a high voltage insulator. A clamp assembly centrally formed within a coronal ring permitting positive placement of the coronal ring about an insulator end fitting. The clamping assembly includes an integral clamp with a U-shaped opening for engaging a cylindrical portion of an insulator end fitting. Two keeper clamps are pivotally mounted superjacent to the integral clamp, each keeper clamp having a smaller U-shaped opening both of which engage a portion of the insulator end fitting and pivot toward each other between an insulator receiving position and an insulator securing position, securing the insulator between the integral clamp and the two keeper clamps. A captive fastener such as a bolt extends upwardly through the clamp and the keeper clamps to secure the keeper clamps in position against the insulator end fitting and the integral clamp to secure the corona ring in position relative the insulator end fitting.

Abstract: A high-voltage bushing for insulating a conductor going through a metallic wall is described herein. To allow a conventional current transformer to be used to monitor the current flowing through the conductor, an external shield is embedded in the tubular body of the bushing and electrically connected to the metallic wall. An internal shield, also embedded in the tubular body of the bushing and electrically connected to the conductor, is provided to prevent the electric field to generate high levels of partial discharge in the air surrounding the conductor in the tubular body.

Abstract: An electric power transmission line with protection devices against lightening overvoltages in the form of a lighting arrester with a surface discharge. Having a relatively long discharge path, the impulse lightening flashover does not lap over a power arc of operational frequency and, after passing of the lightening overvoltage impulse current, the line will continue a trouble-free operation without being disconnected. Simple and reliable arrester designs are disclosed among which are fittings with dielectric covers and insulators, integrating their direct functions with the lightening arrester's functions.

Abstract: An improved apparatus for deconcentrating an electric field surrounding a high voltage insulator. A clamp assembly centrally formed within a coronal ring permits positive placement of the coronal ring about an insulator end fitting. The clamping assembly comprises an integral clamp with a u-shaped opening for engaging a cylindrical portion of an insulator end fitting. A keeper clamp mounts superjacent to the integral clamp and a smaller second u-shaped opening engages a portion of the insulator end fitting having a smaller diameter. A captive fastener such as a bolt extends upwardly through the clamp and keeper clamp to secure the keeper clamp in position against the insulator end fitting and the integral clamp to secure the corona ring in position relative the insulator end fitting and sheds. The varied sized openings of the clamp and keeper clamp prevent inverted installation of the corona ring.

Abstract: A bushing wherein the voltage stress across the surface of the bushing is alleviated by placement of a layer of insulating material in direct contact with the surface. The insulating material is preferably a high-voltage type, heat-shrinkable, halogen-free polyolefin, and is preferably fully shrunk to conform to the contours of the outer surface of the bushing.

Abstract: An explosion-proof porcelain housing for a gas-filled insulating apparatus includes a hollow porcelain housing body having a tapered inner surface, and a resin lined on the inner surface of the porcelain housing body. The thickness of the resin lining decreases along the tapered inner surface.

Abstract: A support assembly for non-metallic cable incorporating a metallic support fitting and a preformed metallic stress limiter, the latter including a generally mushroom-shaped hollow body having a tubular stem portion inserted between one end of the support fitting and the cable, and a generally part-toroidal head portion having an outer profile which is smoothly curving.

Abstract: A corona shield assembly for connection to various portions of a transmission line subassembly having two sets of oppositely mounted corona shields, each corona shield being bolted directly to a portion of the transmission line subassembly such that the corona shields extend substantially over the subassembly portion of the transmission line. A pair of bolts mate with holes in the individual corona shields and with corresponding aligning holes in the transmission line subassembly to mount the corona shields over the desired portions of the transmission line subassembly.

Abstract: A high voltage arcing horn device for safely dissipating electrical arcs caused by power surges in high voltage power lines, the device being provided with a first rigid electrode electrically connected to one of a pair of electrically isolated conductor terminals of an insulator, and a second rigid electrode electrically connected to the other of the conductor terminals, the electrodes including proximal portions fixedly clamped to the terminals and extending in predetermined spaced relationship adjacent the insulator and having distal end portions disposed in predetermined, parallel, spaced relationship one to the other.

Abstract: A corona tube is provided wherein the tube is flexible so that it can fit on any three dimensional container rim. The tube can be a flexible steel tube which is a standard commercial variety of corrugated steel tube which is usually used to contain wires or the like. The tube has a slotted edge along its length, is cut to a length to the periphery of the rim and bent in the shape of the rim. The slot of the flexible tube is placed over the edge of the rim and thereafter the tube can be welded to the rim.

Abstract: In order to prevent sparking or corona effects in the high voltage carrying parts of the outdoor high voltage circuit breaker, shielding electrodes are provided. The shielding electrodes are angular frames. The frames are formed of hollow cylindrical straight rods and of substantially spherical corner pieces which connect the rods with each other. With this design, there are minimum costs of the component parts for shielding electrodes of varying size and shape.

Abstract: An insulated distribution conductor separated from the substation by one or more fuses is protected from arc damage by a clamp device having sufficient mass to absorb the arc energy and thereby prevent burndown and diameter reduction of the conductor at a point where the insulation covering has been removed. The clamp comprises two members which are bolted together to surround the bare section of the conductor and provide additional heat-absorbing mass at the point where the arc tends to dwell, i.e. at the end face of the insulation covering farthest from the power source.

Abstract: A covered distribution wire is provided with a clamp device having sufficient mass to provide conductor protection against damage from fault current arcs over a section of the conductor where the insulation cover is removed for interconnection or insulator support purposes. The clamp comprises two members which are bolted together to surround the conductor section such that an enlarged disc-like end clamp portion is positioned about the conductor within one and a half centimeters of an end face of the adjacent wire cover. The two members are secured together such that a pair of slots exists between them along opposite sides of the conductor section with splatter barriers located on one end thereof. The slots are tapered with increasing width in the radially outward direction with the minimum width being great enough to avoid weldment and the maximum width being less than that which allows fault arc travel through the slot to the conductor section.

Abstract: A lightning arrester device comprises a serial connection of a non-linear resistor and a linear resistor as a lightning arrester and a pair of electrodes disposed at both ends of the lightning arrester with a spark gap being defined between the electrodes thereby preventing a damage of the lightning arrester caused by direct lightning to a power transmission line.

Abstract: A dielectric corona ring to provide field shaping by spreading or deconceating an electric field for reduction or elimination of ionization of air near a high voltage insulator.

Abstract: The invention is directed to a control electrode for high-voltage apparatus which alters the electric field in the vicinity of the voltage-carrying parts. The control electrode includes a formed body of a conductive plastic foam material. The control electrode is suitable, for example, for multipole medium-voltage switching apparatus wherein the pole spacing can be reduced with the air of control electrodes of the invention.