Abstract: A shielded banana plug attached to one end of a test lead is suitable for connection to a corresponding input receptacle in an instrument. The plug includes an inner conductor having an first nonconductive shroud which is concentric with and spaced apart from the inner conducter. The shroud extends beyond the tip of the inner conductor. A conductive shield is concentric with and outside the first nonconductive shroud and is recessed from the end of the shroud. A nonconductive outer shroud is spaced apart from and concentric with the shield and extends beyond the tip of the inner conductor. An input receptacle suitable for mating with the shielded banana plug includes an conductive inner sleeve for receiving the inner conductor, a nonconductive shroud that is concentric with and outside the inner sleeve and which extends beyond the inner sleeve, and a conductive outer sleeve for receiving the conductive shield. The input receptacle is also suitable for mating with a conventional, nonshielded banana plug.

Abstract: A gas insulated device includes a grounded tank filled with an insulating gas and having a conical insulator spacer securely mounted therein to define an interior space. A through-type electric connector extends through and is supported by the insulated spacer and an electric conductor is electrically connected to the through-type electric conductor by a conductor connector. The conductor connector closest to the insulator spacer is positioned such that electric flux lines exiting from the conductor connector intersect with the surface of the insulator spacer in a region in which an electric field has a strength equal to or less than 70% of the strength of the strongest electric field on the surface of the insulator spacer generated by a lightning impulse applied to the gas insulated device.

Abstract: In a process and device for making an electrically connection between two end sections of two cable ducts, each duct having one electrically conducting wire, embedded in a wall of the duct and enclosed on all sides it is suggested to fit a collar comprising separable elements around the end section of each cable duct, to connect the collars by an electrically conducting cable, to achieve electrical contact between the detector wire and the conducting cable and to clamp the separable elements together.

Abstract: The end flange (16) of the first encasing part (10) of the gas-insulated high-tension installation is an outer flange and includes through bores (34). A first securing ring (18) is provided on the end-face side of the end flange (16). The securing ring holds a first insulator (28). The first securing ring (18) includes through bores (36) which are in alignment with the through bores (34) and which have a stepped configuration. The step forms, in each instance, a counterabutment (42), which cooperates with the abutment (44) of the respective threaded bolt (38). To secure the first securing ring (18) on the first encasing part (10), the abutment (44) rests on the counterabutment (42) and, on the other side, the threaded bolt (38) is supported by the nut (48) on the end flange (16).

Abstract: The duct comprises an inner tube in which the wires are disposed, and this inner duct is placed inside an outer tube so as to provide a continuous inner space between the tubes, which completely surrounds the inner tube. A water inlet is in communication with the inner space and water is allowed to penetrate into the inner space upon the opening of a valve. The valve is operated by a fire detector. Upon activation of the valve in case of fire, water circulates through the inner space and is rejected into a drain. This system constitutes a fire and heat barrier for the wires of a building, for example.

Abstract: A coaxial cable conductor (20) comprises a center conductor (22) having a preselected longitudinal shape and a longitudinally split outer conductor (24). The split outer conductor (24) includes a first partial outer conductor (60) comprising a portion of the circumference of the outer conductor along its longitudinal length and a second partial outer conductor (62) comprising the remaining portion of the circumference of the outer conductor along its longitudinal length and mating with the first partial outer conductor (60) along two joints (64). The two partial outer conductors (60, 62) may be mechanically joined and sealed along the longitudinal joints against leakage of radio frequency energy, as by the application of a conductive coating along the joints. The center conductor (22) is supported within the outer conductor (24) by a plurality of electrically insulating dielectric supports (68), leaving an insulating air gap between the center conductor (22) and the outer conductor (24).

Abstract: A single-pole gas-insulated line duct has a enclosing tube and an inner conductor held centered in place in the enclosing tube by support insulators. Electrode bodies embedded in arms of the support insulators engage either in a slot between flanges of sections of the enclosing tube or lie against the inside wall of the sections with a spring-action contact member. Locking members connect the support insulators and sections of the inner conductor. Coupling members can be introduced into abutting sections of the inner conductor and demonstrate mutli-surface sliding contact elements.

Abstract: For each phase, a metal-clad line comprises a phase conductor surrounded by an aluminum sheath, with each aluminum sheath being surrounded by a sheath which is gas-tight relative to the outside. The inside of said gas-tight sheath(s) is/are filled with a gas having good dielectric properties. The aluminum sheath is made up of two half-shells with each half-shell being formed by a folded strip whose section is in the form of a semicircle terminated at each end by a shoulder and a flat, with the two half-shells being juxtaposed and assembled to each other via their flats. The invention also provides a method of manufacturing the metal-clad line which is particularly applicable to underground metal-clad lines.

Abstract: A coaxial-line section includes an outer conductor and an inner conductor tube centered coaxially inside the outer conductor and contacted by couplings which are supported by insulators or beads. The couplings are provided at their facing ends with a ring of laminated springs which allow the thermal expansion of the inner conductor tube. Extending inside along the inner conductor tube are two preferably bar-shaped displacement compensating elements. The axial inner end of each displacement compensating element is firmly anchored to the inner conductor tube while its axial outer free end defines with the end faces of the respective coupling a stop face.

Abstract: A device for connecting coaxial cables includes an inner bridging member rigidly connecting the inner conductors of the cables to be linked. The outer conductors of the cable are connected by a metal sleeve which resiliently surrounds and contacts both outer conductors and is clamped in circumferential direction. The sleeve is divided in distinct sections whereby those sections surrounding the conductors to be connected are provided with webs extending radially inwardly so as to provide the resilience of the sleeve.

Abstract: A high-voltage line which includes a conductor supported in a metal encapsulation which is filled with insulating gas and which consists of pipe sections, the ends of which are welded together in a gas-tight manner at specially formed annular mating surfaces. A high-voltage conductor in the interior of the metal encapsulation is supported on partitioning insulators which divide the metal encapsulation into axially spaced cylindrical spaces. Between every two partitioning insulators one or more support insulators are arranged, each of which is located in a distinctly formed annular space. The body of the support insulator is comprised of insulating material having openings in it. The mating surfaces of the two pipe ends are separated by a V-shaped annular gap and are welded together by a welding seam which fills the annular gap. The welding seam has a root which extends annularly and which is electrically in contact with the metallic outer edge of the partitioning insulator or support insulator.

Abstract: A gas-insulated transmission line includes an outer sheath and an inner conductor disposed therein, which inner conductor is formed from two inner conductor sections electrically connected together. A contact shield surrounds and electrically shields the connection of the two inner conductor sections. Insulating supports spatially support the contact shield within the outer sheath, and the contact shield physically supports the inner conductor sections. The insulating supports thus support the inner conductor through the contact shield.

Abstract: An improved gas-insulated transmission line is disclosed in which the transmission line itself is constructed in a modular fashion from elements which are joined together, typically at the final installation location, to form the transmission line. The other sheath and the inner conductor can be fabricated separately, at different locations and by different manufacturers, and transmitted to the point of final assembly and installation. A backup ring, insulator support assembly, contact shield, and connection member are separately fabricated into a single modular member, which can by itself be subjected to the testing procedures normally undertaken at the factory. This modular member, after satisfactorily passing its acceptance test, can then be shipped to the installation site.

Abstract: The central conductor of a gas-insulated flexible cable consists of separate concentric tubes which are alternately spirally corrugated and annularly corrugated so that the corrugations will not nest relative to one another and are axially movable relative to one another.

Abstract: A gas-insulated electric apparatus improved in the conductive, heat-releasing, waterproof and rustproof properties, which comprises a plurality of linearly arranged grounded metal cases; and wherein a flange is formed at both ends of all adjacent metal cases; the flanges provided at the mutually facing ends of said metal cases are tightly joined together by proper means for the electric and mechanical connection of said metal cases; and a compound prepared by mixing silicone oil with 20 to 40% by weight of zinc powder and 5 to 15% by weight of aluminum powder is applied to the surface of the junction of the flanges.

Abstract: A gas-insulated transmission line includes an outer sheath, an inner conductor, an insulating gas electrically insulating the inner conductor from the outer sheath, and insulating supports insulatably supporting the inner conductor within the outer sheath. The inner conductor is provided with flexibility by the use of main conductor sections which are joined together through a conductor hub section and flexible flexing elements. Stress shields are provided to control the electric field at the locations of the conductor hub sections where the insulating supports are contacting the inner conductor.The flexing elements are formed by sandwiching together, by fusing, a pair of thin hollow discs which are fixedly secured to both the main conductor sections and the conductor hub section.

Abstract: A gas-insulated transmission line includes an outer sheath, an inner conductor, an insulating gas electrically insulating the inner conductor from the outer sheath, and insulating supports insulatably supporting the inner conductor within the outer sheath. The inner conductor is provided with flexibility by main conductor sections which are joined together through a conductor hub section and flexible flexing elements. Stress shields are provided to control the electric field at the locations of the conductor hub sections where the insulating supports are contacting the inner conductor. A plug and socket arrangement is utilized for joining adjacent sections of the inner conductor, and a protection tube is utilized inside the hollow plug to maintain proper alignment of the joint when the transmission line is bent.

Abstract: A gas insulated transmission line having radially flexible field control means for reducing the electric field along the periphery of the inner conductor at predetermined locations wherein the support insulators are located. The radially flexible field control means of the invention includes several structural variations of the inner conductor, wherein careful controlling of the length to depth of surface depressions produces regions of reduced electric field. Several embodiments of the invention dispose a flexible connector at the predetermined location along the inner conductor where the surface depressions that control the reduced electric field are located.

Abstract: A gas-insulated transmission line includes an outer sheath, an inner conductor, an insulating gas electrically insulating the inner conductor from the outer sheath, and insulating supports insulatably supporting the inner conductor within the outer sheath. The inner conductor is provided with flexibility by use of main conductor sections which are joined together through a conductor hub section and flexible flexing elements. Stress shields are provided to control the electric field at the locations of the conductor hub sections where the insulating supports are contacting the inner conductor.The flexing elements and the stress shields may also be utilized in connection with a plug and socket arrangement for providing electrical connection between main conductor sections.

Abstract: The invention relates to an installation for transmitting electrical power which includes a safety device for providing protection against the effects of electric arcs, said installation including a metal casing (5) filled with a dielectric gas under pressure and having a coaxial central conductor (1,2). In such an installation, where a conductor (1,2) and a casing (5) are held in position relative to each other by a transverse insulator (8), said safety device comprises a tubular electrode (9) situated close to the casing (5) and to the insulator (8) and upstream therefrom relative to the direction of power transmission. The tubular electrode is electrically connected to the casing (5) by conductors (12) which are disposed at a small number of points around its periphery. The invention applies to protecting high-tension electric installations contained in metal casings.

Abstract: The disclosure concerns a detachable coupling for a pressure-medium-filled high frequency line and/or for a coaxial line and/or for a hollow wave guide. The abutting ends of two sections of the line are gas sealed. A valve arrangement at the abutting ends opens the communication between the line ends when the line sections are coupled and seals the line sections when the line sections are separated. Various valving arrangements are illustrated for various types of lines, coaxial lines and wave guides.

Abstract: An article for connecting together two substrates, for example the inner conductors of two coaxial cables to be spliced, comprises a sleeve having axially slidably mounted thereon at least one spacer, which spacer enables any member subsequently positioned around the sleeve to be spaced at a desired distance from the sleeve. The method, also described, of using the article to join substrates has the advantage that the substrates can be connected without the need to bend them substantially, so preventing damage to the substrates.

Abstract: A gas-insulated transmission line includes two transmission line sections each of which are formed of a corrugated outer housing enclosing an inner high-voltage conductor disposed therein, with insulating support means supporting the inner conductor within the outer housing and an insulating gas providing electrical insulation therebetween. The outer housings in each section have smooth end sections at the longitudinal ends thereof which are joined together by joining means which provide for a sealing fixed joint.

Abstract: A termination for the stranded cable used in a gas-insulated bus is disclosed, where the termination consists of an expander structure which wedges into a central area of the stranded cable and presses the stranded cable against an outer conductive retainer cylinder. The expander structure consists of a cylindrical double-ended body which receives sliding wedges at its opposite ends which are drawn together by the operation of an externally accessible bolt. The sliding wedges are keyed to the cylindrical member to prevent relative rotation of the sliding wedges relative to the cylindrical member as the wedges are drawn together.

Abstract: A metal ring adjacent the support insulator of a gas-insulated bus lines the interior of the outer grounded housing. The ring is formed to define at least a portion of a turn around the central bus so that, in the event of an arc from the central bus to the outer grounded housing, the arc root will fall on the interior of the metal ring and the arc current will create a magnetic field which will cause the arc root to rotate around the interior of the metal ring.

Abstract: A coupling for sealingly joining together two sections of gas-containing pipe. The coupling comprises an annular housing having two end sections with an inside diameter substantially the same as the pipe outside diameter, and an intermediate section with an inside diameter greater than the pipe outside diameter and forming an annular space therebetween. The two end sections are capable of being welded to the pipe, and into the annular intermediate space is inserted an annular elongated C-shaped sleeve. Also included are pressurization means for compressing the sleeve against the pipe sections to seal the joint therebetween.

Abstract: The cable connection for low-temperature cable in which a pair of cable ends are joined. Each cable comprises a plurality of generally coaxial ducts defining a central compartment traversed by the electrical conductor or a plurality of electrical conductors in a sheath of electrical insulation and a pair of evacuated (vacuum) compartments surrounding the central compartment. Between the two vacuum compartments there is provided a coolant-filled compartment. In the connector, the evacuated compartments of the two cable ends overlap axially and the connection is formed by rigid, preferably cylindrical, walls.

Abstract: A coupling flex-plate member comprising a circular metallic member having a centrally-disposed annular groove provided therein, providing a generally H-shaped cross-section, is fixedly secured to the confronting ends of adjacent inner high-voltage tubular conductors of a gas-insulated transmission line to permit a limited, but sufficient flexibility, of the inner conductor sections, or conductor buses. A low-strength high-conductivity material is used for the coupling flex-plate member, and permits an axial bending in a spring-like fashion until material yielding occurs. Inaccuracies during fabrication and assembly of the component parts are accommodated by the use of such a coupling flex-plate member without damaging adjacent components, especially spacing insulators, which are, of course, brittle and subject to fracture.

Abstract: A sectionalized horizontal enclosing sheath for high voltage, gas-insulated electric bus apparatus comprises axially adjacent sheath members in spaced-apart relation connected by an annular coupling band. Juxtaposed ends of the band cooperate with the spaced apart sheath members to define an elongated transverse aperture in a bottom wall of the sheath and between the coupled sheath members. A box-like receptacle for trapping free conducting particles within the sheath is affixed over the aperture externally of the sheath.

Abstract: Gas-filled enclosed electric bus apparatus having an enlarged spherical elbow joint is provided with a joint housing having a deep particle trap directly beneath the spherical joint and at least one narrow entrance slot in the housing bottom wall. Each slot extends transversely of the longitudinal axis of a horizontal conductor connected at the joint and the housing bottom wall is inclined in all directions toward the trap.

Abstract: Enclosed gas-insulated electric bus apparatus especially designed for use in horizontal disposition with high unidirectional system voltage includes deep trench-like electrostatic particle traps and inclined ramps leading to the traps. A method for entrapping such particles prior to the application of system voltage comprises preliminary imposition of an alternating conditioning voltage of relatively low magnitude from a low power source, preferably in steps of increasing magnitude.

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: Method and apparatus for forming a joint in a high voltage gas insulated electrical system wherein an outer spherical joint member surrounds an inner spherical joint member which is supported from only one of the inner housing conductors. The inner housing conductor which supports the inner sphere is supported where it extends into the outer housing sphere from a circular insulating member. The circulating insulating spacer and support is rigidly connected to a flanged opening formed on the outer housing sphere. The inner sphere which is rigidly supported is provided with a plurality of sliding contact openings for engaging other inner conductors of the additional bus sections to be joined. The outer spherical housing is formed from two hemispheres each of which has an opening formed therein. The plane defined by the opening into the hemisphere is transverse to the plane defined by the free ends of the hemisphere.

Abstract: A high voltage cable filled with an insulation gas under an operating pressure of more than 1 Bar, in which one or more conductors are supported by insulators, embedded in a tubular sheath of interconnected rigid elements and in which the gas-filled spaces of adjacent segments are connected together through a sealing element which is open under operating conditions and is closed when the pressures in the adjacent segments differ by more than a predetermined pressure difference.

Abstract: A pipe coupler utilized for connecting two sections of pipe to prevent the escape of gas from within the pipe through the joint therebetween. An annular coupling member comprises two end sections and an intermediate section therebetween, with the two end sections having an inside diameter substantially the same as the outside diameter of the pipe sections, while the inside diameter of the intermediate section is greater. The two pipe sections are disposed within the coupling member, with the joint positioned longitudinally within the intermediate section. The two pipe sections and the intermediate section form an annular space therebetween, and in this annular space is positioned an annular sealing gasket. The sealing gasket has an inside diameter substantially the same as the pipe outside diameter, and has a radially outwardly extension positioned therearound.

Abstract: High voltage apparatus having a voltage carrying part such as a conductor enclosed by a housing with a gas, such as SF.sub.6 under pressure, used as insulation in the housing in which, in order to prevent burn-off of the housing and the voltage carrying part in the event of an accidental standing arc, the wall of the housing and, optionally, the voltage carrying part are provided, in the area most likely to be exposed to an accidental standing arc, with a reinforcement against burn-off which includes means to relieve compressed gas pressure and is designed so as to have a heat insulating effect for the wall of the housing.