Bbc Brown, Boveri & Company, Limited

Carl D Floessel

Franz Czech

Klaus Floessel

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.

Metal-encapsulated gas-insulated high-voltage line

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. When the phase conductors linearly expand as a result of differential heating of the phase conductors, each phase conductor is free to expand in the longitudinal direction thereby moving the supporting insulator associated with each individual phase conductor a corresponding amount in the axial direction with no detrimental mechanical effects to any part of the gas pipe cable. A single compensator for each phase conductor in each gas pipe cable section is sufficient to absorb the thermal expansion of each phase conductor.

Gas pipe cable

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.

Gas insulated high voltage line and method of assembling same

A direction-changing arrangement for a three-phase pipe-type gas-pressurized electrical cable constituted principally by rigid straight pipe lengths connected in series and wherein the axes of the three phase conductors supported within the pipe when viewed in cross-section form a triangle. The desired change in direction is accomplished by interposing a spherical elbow pipe between two straight pipe lengths which includes a pair of branch pipe stubs connected to the ends of the adjoining straight pipe lengths, and three curved conductor members supported within the elbow and arranged symmetrically to the plane formed by the respective axes of the two branch pipe stubs which intersect at the center of the elbow. Three intermediate conductor sections are provided and these serve to interconnect the ends of the three inner conductors within the adjoining straight pipe lengths with the ends of the three curved conductor members within the elbow.

Apparatus for changing the direction of a three-phase pipe-type

A tube enclosed pressure gas insulated electrical cable has at least one conductor supported within a tubular enclosure by means of insulators, the conductor being sectionalized longitudinally and provided with expansion joints between the ends of adjacent sections to compensate for thermal expansion of the conductor. To protect the expansion joint and prevent it from being compressed and possibly collapsing under the inherent weight of the internal conductor structure when the cable is laid down a steep slope, a protective device is provided, this being constituted by a compression spring interposed between the ends of adjacent sections at the expansion joint for counteracting the weight of the conductor on the joint.

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Fislisbach, Switzerland

Carl D Floessel