Abstract: A soft silicone rubber insert is compressed between the interior surface of an insulator support in a gas-insulated cable and the outer surface of a soft aluminum central conductor which is supported within the interior surface of an opening in the insulator. The flexible rubber insert prevents scratching of the surface of the aluminum conductor and the production of aluminum particles during relative movement between the insulator and the aluminum tube.

Abstract: A gas-insulated bus bar, wherein each end of a plurality of support arms for holding bus conductors substantially in the center of a case which faces the inner peripheral wall of the case is fitted with a metal member whose end spatially faces the inner peripheral wall of the case; an annular groove is formed in the end portion of the metal member; an annular sliding member prepared from an elastic electrically insulating synthetic resin capable of easily sliding over the inner peripheral wall of the case is inserted into the annular groove in a state to project from the end of the metal member to be pressed against the inner peripheral wall of the case; a radially extending hole open to the inner peripheral wall of the case is formed in said end of the metal member; a metal button is inserted into said hole in a state urged toward the inner peripheral wall of the case; and the support arms are elastically pressed against the inner peripheral wall of the case.

Abstract: A three-phase gas insulated bus has three high voltage conductors inside a grounded cylindrical metal sheath filled with an insulating gas. The conductors are integrally supported by a single spacer having three supporting parts. The spacer is radially slidably coupled with the inner wall of the sheath.

Abstract: Isolated phase bus duct includes apparatus for adjustably attaching an insulator to the inner surface of a disconnecting switch enclosure to accommodate positional and angular tolerances. The apparatus includes a base member tangential to the surface of the enclosure having a first circular aperture with angled sidewalls. A first circular positioning plate having an angled outer sidewall is seated in the first aperture and includes a second circular aperture non-concentric with the first plate. The second aperture also includes angled side walls and has mounted therein a second circular positioning plate. The second plate has a third circular aperture therein which has angled sidewalls and is non-concentric with the second plate. Seated in the third aperture is a ball plate adapted to be bolted to an insulator.

Abstract: A gas-insulated transmission line includes a cylindrical outer sheath, an inner conductor within the outer sheath, an insulating gas, and support insulators for insulatably supporting the inner conductor within the outer sheath. The support insulators have a pair of circumferentially spaced apart openings therein, and a wheel assembly is disposed within each of the support insulator openings. Each wheel assembly includes a rotatable wheel which extends outwardly of the support insulator opening and contacts the outer sheath. With such an arrangement, insertion or movement of the inner conductor within the outer sheath is done on wheels instead of with a sliding motion to thereby minimize the generation of conducting contamination particles.

Abstract: A gas-insulated transmission line is formed of a plurality of outer sheath sections joined together lengthwise, with a conductor disposed therein. A two leg insulating spacer supports the conductor within the sheath sections, and axially extending grooves on said sheath sections receive the ends of the insulating spacer.

Abstract: A three phase gas pipe cable is disclosed which has at least one gas pipe cable section in which three phase conductors are arranged in a triangular configuration within an enclosing pipe. Each phase conductor is supported by at least one supporting insulator such that the longitudinal axis of each phase conductor is substantially parallel to the longitudinal axis of the enclosing pipe. The supporting insulator is connected by a slide bearing member to the enclosing pipe. The slide bearing member accommodates an insulator foot end of the supporting insulator in such a manner that the supporting insulator is capable of motion in the direction of the longitudinal axis of the enclosing pipe.

Abstract: This invention relates to an assembly for supporting high-current bus bars, particularly those in tubular enclosures, and it solves the problem of design, as well as assembly and disassembly, of the supporting insulators of high-current bus bars. Each insulator of a high-current bus bar, particularly that in a tubular enclosure supporting the bus bar, is fastened to a bracket mounted to the opposite inner sides of the flange of an assembly-inspection hole, preferably of an oval shape, whereas two holes on both sides of the bracket form assembly-inspection spaces for the insulator and the insulator cap covered, together with the bracket, by means of a lid. Moreover, in order to make possible a slidable motion of the insulator, to which the bracket has been mounted, a special shock-absorbing member has been introduced between the cover and the bracket.

Abstract: A gas insulated, high-voltage electric line, as well as a method and apparatus for assembling the high-voltage line, is disclosed. The high-voltage line includes a pipe jacket as well as a conductor centrally arranged within the pipe jacket. A carrier ring encircles the conductor at each of a plurality of stations along a longitudinal axis of the pipe jacket. Each carrier ring carries a plurality of radially directed insulators. Interposed between each insulator and its respective carrier ring is a spring which urges the insulator radially outwardly toward, and into engagement with, the inner surface of the pipe jacket.

Abstract: A bus conductor support system includes a tubular bus conductor removably mounted on an insulator assembly in a hollow conductive tubular enclosure. The tubular enclosure is secured to a mounting platform. Access openings are provided in the tubular enclosure for servicing purposes. One end of the insulator assembly is removably secured to the hollow tubular enclosure in a manner which allows easy access thereto through an access opening in the tubular enclosure. The bus conductor is removably mounted on an opposing end of the insulator assembly in a manner which also allows easy access thereto through the same access opening in the tubular enclosure. In one embodiment, a single side access opening in the tubular enclosure is in proximate relation to securing means for the insulator assembly and mounting means for the bus conductor.

Abstract: Separate conductive foils, riveted in electrical connection to each end of the ground bus in a busway section, are wrapped over the flange of the busway section housing. Upon joining two busway sections end-to-end, the foils of adjacent ground bus ends are sandwiched between the lapped flanges of adjacent busway sections. The ground bus joint is perfected by bolts clamping the lapped flanges together.

Abstract: A control center characterized by vertical bus bars supported by dielectric insulators which are disposed in vertically spaced pairs along the bus bars and which are molded with a configuration to accommodate bus bars of various shapes and sizes.

Abstract: In environments utilizing highly explosive or flammable materials and in hospital operating rooms, the use of isolated power and an equipotential grounding system is essential. The distribution of isolated power and an equipotential ground on the surface areas of such enivornments is accomplished by a duct which is essentially an extruded aluminum channel that fastens to the wall with mounting screws. The channel has a main body portion and a cover plate that snap fits to the body portion. The channel is adapted to be utilized in sections, each section being readily attachable to another section. A ground bus bar is carried in the channel to which all ground leads are directly connected. In an alternate embodiment, the duct is adaptable to effectively provide two separate channels by the insertion of a partition which is held in place by holding fingers.

Abstract: In electric switchgear for high voltages a busbar system, of which each busbar consists of two identical rod-shaped conductors which are fastened by bolts to supporting insulators in specularly symmetric fashion.

Abstract: A supporting rail for supporting electrical fixtures or the like. The device comprises an extruded plastic elongate member which is formed at least in part by spaced inner and outer walls that are joined at spaced locations about the cross-sectional periphery of the member. The spaced walls define therebetween longitudinally extending hollow channels for carrying wires or the like, and the inner wall encloses an elongate inner chamber which is open along its length. A structurally rigid rail is thus provided but without requiring the use of substantially solid construction in the extruded rail.

Abstract: A gas-insulated transmission line including an elongated outer sheath and a plurality of elongated inner conductors disposed within the outer sheath. An insulating gas electrically insulates the conductors from the sheath, and support means insulatably support the conductors within the sheath. The interior of the outer sheath is separated into a plurality of discrete compartments by walls, with each compartment having disposed therein one of the inner conductors. The compartmentalization of the outer sheath minimizes the possibility of a fault being transferred from one inner conductor to the other conductors.

Abstract: An electrical distribution switchboard including a multiphase horizontal main bus and a multiphase vertical riser bus. A plurality of protective members are provided, each being vacuum formed from a thermoplastic carbonate-linked polymer material. Separate protective members are provided for each individual phase conductor of the horizontal and vertical bus.

Abstract: An electric current conducting bar of generally X-shaped configuration in transverse cross-section for use in an electric transmission system wherein a plurality of said bars of modular lengths, jointed in longitudinally alined end-to-end relation by various coupling assemblies, are fitted with insulating sheaths of generally inverted U-shape, also of modular lengths, which protectively cover not only the conductor rail per se and their coupling assemblies but also the current collector shoe which moves in electrical contact with the bar without any utilization of the insulating sheath primarily as a guide for the collector shoe. In a modified form of the X-shaped bar, the upper branches thereof are extended horizontally outward from opposite sides of the mid-section of the bar to provide the latter with a flat top having opposed longitudinally extending edges which are respectively accommodated in opposed longitudinally extending inner grooves formed in the insulated sheath.

Abstract: A contamination control device for use in a gas-insulated transmission bus consisting of a cylindrical center conductor coaxially mounted within a grounded cylindrical enclosure. The contamination control device is electrically connected to the interior surface of the grounded outer shell and positioned along an axial line at the lowest vertical position thereon. The contamination control device comprises an elongated metallic member having a generally curved cross-section in a first plane perpendicular to the axis of the bus and having an arcuate cross-section in a second plane lying along the axis of the bus. Each opposed end of the metallic member and its opposing sides are tapered to form a pair of generally converging and downward sloping surfaces to trap randomly moving conductive particles in the relatively field-free region between the metallic member and the interior surface of the grounded outer shell.

Abstract: A switchboard construction utilizes modular, insulative mounting panels to both electrically isolate and physically mount the various busbars, as well as, via line straps, the various electrical devices to the cabinet frame. The mounting panels installed vertically end-to-end also serve as rear barriers for the compartments accommodating the electrical devices. Barrier sheets secured to the front and back of the panels shield personnel from live parts. Load straps pass through apertures in the panels and vertical buses to the rear of the cabinet for convenient load connection. Horizontal bus sections are joined, electrically connected to and mounted by the vertical buses at common locations.

Abstract: An improved supporting insulator assembly is provided for high-voltage metal-enclosed gas-insulated equipment in which the peripheral flange portion is formed of two separate members, one member being an internal insulating spacer-member supporting the inner high-voltage conductor, and the other member being, optionally, of insulating or metallic material, and constituting an outer annular ring-shaped clamping support member, the latter being under high-loading pressure between the two confronting metallic flange portions of the outer metallic grounded casings, or pipe sections.

Abstract: A rail construction for rail-type electrification systems, comprising a conducting rail member having a cross-sectional configuration somewhat like a pair of channel shapes disposed back to back. One channel shape is used for suspension or mounting, as well as rigidity. The other channel shape contains a stainless steel insert in the form of a flat contact member which is secured in place by being pinched between opposed wall areas of flanges of the rail member, in consequence of the flanges being swaged or displaced beyond their elastic limit to effect a gripping of the contact member. The inner walls of the flanges, which adjoin the elongate contact member, constitute metal guideways that assure a positive tracking of the collector shoe. Any small relative movements between the conducting rail member and the stainless steel insert, as occasioned by temperature changes for example, cannot result in loosening of the insert or deterioration of the electrical conductance thereto.

Abstract: An elongated section of bus duct having U-shaped insulating pieces surrounding the longitudinally extending edges of the stacked bus bars and a flat insulating sheet of a material which does not adhere to the U-shaped insulating pieces disposed between the bus bars. The flat insulating sheets can also be disposed between the housing and the outside stacked bus bars which are compressed by the housing. The non self-adhering U-shaped pieces and the flat insulating sheets permit the insulated bus bars to slide with respect to each other due to differentials in expansion and contraction of the bus bars. The sliding action, of the U-shaped insulating pieces and the flat insulating sheet, prevents rupture of the primary insulation layer which is applied to the bus bars and which is self-adhering at operating temperatures and pressures.