US3786174A - Insulation gas filled encapsulated high voltage electrical conductor - Google Patents

Insulation gas filled encapsulated high voltage electrical conductor Download PDF

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Publication number
US3786174A
US3786174A US00272875A US3786174DA US3786174A US 3786174 A US3786174 A US 3786174A US 00272875 A US00272875 A US 00272875A US 3786174D A US3786174D A US 3786174DA US 3786174 A US3786174 A US 3786174A
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US
United States
Prior art keywords
conductor
casing
legs
leg
voltage electrical
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00272875A
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English (en)
Inventor
D Floessel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BBC Brown Boveri AG Switzerland
Original Assignee
Bbc Brown Boveri & Cie
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bbc Brown Boveri & Cie filed Critical Bbc Brown Boveri & Cie
Application granted granted Critical
Publication of US3786174A publication Critical patent/US3786174A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G5/00—Installations of bus-bars
    • H02G5/06—Totally-enclosed installations, e.g. in metal casings
    • H02G5/066—Devices for maintaining distance between conductor and enclosure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49863—Assembling or joining with prestressing of part
    • Y10T29/4987—Elastic joining of parts
    • Y10T29/49872—Confining elastic part in socket
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/5313—Means to assemble electrical device
    • Y10T29/532—Conductor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53657—Means to assemble or disassemble to apply or remove a resilient article [e.g., tube, sleeve, etc.]

Definitions

  • ABSTRACT A high-voltage electrical conductor is encapsulated within an insulation gas filled rectilinear tubular casing and supported centrally within the casing by longitudinally spaced support-insulators each of which is provided with three radially directed legs spaced 120 apart about the conductor.
  • Two of the legs have fixed positions on the insulatorstructure but the third leg is spring-loaded for movement in the radial direction from a retracted, latched position to a radially outward unlatched position;
  • a carriage running on wheels or rolls is used to transport the insulator-conductor structure into the casing with the third leg in its retracted, latched position and with the outer ends of all three legs spaced from the casing wall so that no undesirable contact therebetween takes place during the transporting operation.
  • the latch for the third leg is released causing this leg to move outward and press firmly against the casing wall accompanied by a like movement of the other two fixed legs into pressure contact with the casing wall.
  • the present invention relates to an improvement in the construction of insulation gas-filled tubular encased i.e. encapsulated high-voltage electrical conductor. More particularly, the invention concerns an enclosed high-voltage conductor of the general type wherein the conductor is held in place centrally within a rectilinear, grounded metallic casing by means of support insulators which are spaced longitudinally along the conductor.
  • Enclosed high-voltage conductor structures of this type are known to the industry, reference being made, for example, to the diclosure in'U.S. Pat. No. 2,428,051 wherein the conductor is supported by three legs uniformly spaced about the conductor, i.e. 120 apart in the same plane, and which extend radially into engagement with the inner wall surfaceof the cylindrical enclosing casing structure.
  • the inner-ends of the legs are fastened to the conductor and the outer ends are provided with spring means which enable the legs to be maintained in place by spring-loaded frictional contact with the inner wall surface of the casing.
  • the principal objective of the present invention is to provide an improved multi-leg support insulator construction for encased high-voltage conductors which avoids the disadvantages of the prior known constructions and which enables the multi-leg support to be inserted into the enclosing casing without any abrading effect;
  • the objective is attained in that an initial clearance is provided between all of the legs of the multi-leg support and the inner wall of the casing to permit abrasion-free insertion of the support to its appointed location within the casing, following which at least one leg of the multi-leg' support is shifted radially to engage the inner wall of the casing and develop a pressurized, holding contact between all of the legs of the support and casing.
  • the insulator support consists of a central tubular body portion which surrounds and is supported by the conductor structure and three legs which extend radially outward and are adapted to engage the inner wall of the casing but only after the insulator and conductor structure has been inserted into its proper position within the casing.
  • two of the three legs have fixed positions relative to the central body portion of the insulator and the thirdleg is movable in the radially outward direction under springpressure when released.
  • a wheeled carriage is utilized to transport the insulator-conductor assembly into the casing with all three legs out of contactwith the casing wall and the crriage is provided with means by which the spring-loaded leg is automatically released from its radially inward position when the carriage is withdrawn so that all three legs then take positions in pressure contact with the casing wall.
  • FIG. la is a longitudinal central section through a portion of the encased high-voltage conductor taken on line a a of FIG. lb showing the tri-leg insulator in the installed position, v
  • FIG. lb is a transverse section taken on line b b of FIG. 1a
  • FIG. 2a is a longitudinal control section of the same portion of the encased conductor structure taken on line a a of FIG. 2b with the tri-leg insulator still supported on the carriage and with the spring loaded third leg of the insulator still held in its radially retracted position
  • y FIG. 2b is a transverse section taken on line b b of FIG. 2a
  • the earthed tubular casing which surrounds the high-voltage conductor is indicated at 1 and is metallic, preferably aluminum.
  • the conductor structure is tubular and is constituted by conductor section 2 and 3 joined in essentially end tO-end relation by means of a coupling sleeve 4 which encloses the end portions of the conductor sections and establishes an expansion joint to accommodate temperature-induced expansion and contraction of the conductor sections.
  • An angle piece 5 secured to the end of conductor section 2 and a similar angle piece 6 secured to the end of conductor sections 3 function in conjunction with flexible conductor strap 7 secured at its opposite ends to the angle pieces to provide the necessary current conductive path between the adjacent conductor sections.
  • the hub portion of the tri-leg insulator Surrounding and supported by the coupling sleeve 4 is the hub portion of the tri-leg insulator. Integral with this hub portion are two legs 8 which extend radially and are spaced l20apart. The third leg 9 of the in sulator suppor is, however, arranged for movement in a radial direction with respect to the hub portion 8c and the other two legs 8 and is seen to pass completely through the coupling sleeve 4 and the angle piece 5.
  • leg 9 The end of the upperportion 9b of leg 9 as viewed in the drawings is engageable with the inner wall of easing l and the lower portion is reduced in cross-section to form a stem which is surrounded by a compression spring 10, one end of which bears against a shoulder formed by the junction between the upper and lower portions 9b, 9c, the other end of this apring bearing against the end of strap 7 which rests upon the ,face of the angle piece 5.
  • the lower end of leg 9 terminates in a head 11 which, as shown in FIGS. 2a, 2b is adapted to be engaged by an open-ended slot 12a provided in the chassis of a wheeled carriage 12 by which the insulator-conductor structure is installed within the casing.
  • the insulator-conductor structure After installation of the insulator-conductor structure within casing l, the latter is then filled with the pressurized insulating gas, such as SE, at a pressure of four atmospheres.
  • the pressurized insulating gas such as SE
  • An encapsulated gas-filled high-voltage electrical conductor structure comprising a'rectilinear tubular metallic gas-filled casing, a rectilinear electrical conductor extending longitudinally within said casing, and at least one support insulator structure for centering said conductor within said casing and securing it against longitudinal displacement therein, said support insulator structure comprising at least three legs mounted on said conductor and extending radially in different directions therefrom in a common plane, the outer ends of a plurality of said legs secured to said conductor in fixed position and atleast another one of said legs being movable in a radical direction from a spring-loaded retracted and latched position wherein clearance is established between the outer ends of all of said legs and the inner surface of said casing to a radially outward unlatched position effective to cause all of said legs to engage and bear against the inner surface of said casing under the spring loading of said radially movable leg.

Landscapes

  • Insulators (AREA)
  • Installation Of Bus-Bars (AREA)
  • Insulating Bodies (AREA)
US00272875A 1971-09-13 1972-07-18 Insulation gas filled encapsulated high voltage electrical conductor Expired - Lifetime US3786174A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1329571A CH536565A (de) 1971-09-13 1971-09-13 Isoliergasgefüllt gekapselte elektrische Hochspannungsleitung

Publications (1)

Publication Number Publication Date
US3786174A true US3786174A (en) 1974-01-15

Family

ID=4391145

Family Applications (1)

Application Number Title Priority Date Filing Date
US00272875A Expired - Lifetime US3786174A (en) 1971-09-13 1972-07-18 Insulation gas filled encapsulated high voltage electrical conductor

Country Status (6)

Country Link
US (1) US3786174A (de)
JP (1) JPS4837672A (de)
CH (1) CH536565A (de)
DE (2) DE2147787C3 (de)
FR (1) FR2152837B1 (de)
IT (1) IT967333B (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4038486A (en) * 1975-06-10 1977-07-26 Westinghouse Electric Corporation Supporting insulator assembly for gas-insulated equipment
US4084064A (en) * 1977-09-02 1978-04-11 Westinghouse Electric Corporation Particle trap contact for gas insulated transmission lines
US4085807A (en) * 1977-05-16 1978-04-25 Westinghouse Electric Corporation Gas-insulated transmission line with closed particle trap
US4105859A (en) * 1976-09-03 1978-08-08 Westinghouse Electric Corp. Compartmentalized gas insulated transmission line
US4296271A (en) * 1979-04-09 1981-10-20 Bbc Brown, Boveri & Company Limited Gas insulated high voltage line and method of assembling same
US20140202765A1 (en) * 2009-09-14 2014-07-24 Roger W. Faulkner Underground Modular High-Voltage Direct Current Electric Power Transmission System

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2542514B1 (fr) * 1983-03-07 1985-06-28 Merlin Gerin Procede et dispositif de montage d'une barre blindee d'une installation electrique

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4038486A (en) * 1975-06-10 1977-07-26 Westinghouse Electric Corporation Supporting insulator assembly for gas-insulated equipment
US4105859A (en) * 1976-09-03 1978-08-08 Westinghouse Electric Corp. Compartmentalized gas insulated transmission line
US4085807A (en) * 1977-05-16 1978-04-25 Westinghouse Electric Corporation Gas-insulated transmission line with closed particle trap
US4084064A (en) * 1977-09-02 1978-04-11 Westinghouse Electric Corporation Particle trap contact for gas insulated transmission lines
US4296271A (en) * 1979-04-09 1981-10-20 Bbc Brown, Boveri & Company Limited Gas insulated high voltage line and method of assembling same
US20140202765A1 (en) * 2009-09-14 2014-07-24 Roger W. Faulkner Underground Modular High-Voltage Direct Current Electric Power Transmission System
CN105207130A (zh) * 2009-09-14 2015-12-30 罗杰.福克纳 地下模块化高压直流电力传输系统
US9590409B2 (en) * 2009-09-14 2017-03-07 Alevo International, S.A. Underground modular high-voltage direct current electric power transmission system
CN105207130B (zh) * 2009-09-14 2018-11-23 阿雷沃国际公司 地下模块化高压直流电力传输系统

Also Published As

Publication number Publication date
FR2152837A1 (de) 1973-04-27
DE2147787C3 (de) 1980-09-11
FR2152837B1 (de) 1977-01-14
IT967333B (it) 1974-02-28
DE2147787B2 (de) 1979-12-13
CH536565A (de) 1973-04-30
DE7136336U (de) 1973-06-20
DE2147787A1 (de) 1973-03-22
JPS4837672A (de) 1973-06-02

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