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US3293354A - Connection of electrically insulated high-voltage conductors - Google Patents

Connection of electrically insulated high-voltage conductors Download PDF

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Publication number
US3293354A
US3293354A US245930A US24593062A US3293354A US 3293354 A US3293354 A US 3293354A US 245930 A US245930 A US 245930A US 24593062 A US24593062 A US 24593062A US 3293354 A US3293354 A US 3293354A
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US
United States
Prior art keywords
insulating
gap
sheath
conductors
connection
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
US245930A
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English (en)
Inventor
Clason Jan Christiaan
Eyssink Johannes Ge Franciscus
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.)
Hazemeijer BV
Original Assignee
Hazemeijer BV
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 Hazemeijer BV filed Critical Hazemeijer BV
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Publication of US3293354A publication Critical patent/US3293354A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/08—Arrangements to facilitate replacement of a switch, e.g. cartridge housing
    • H01H9/085—Arrangements to facilitate replacement of a switch, e.g. cartridge housing contact separation effected by removing contact carrying element
    • 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
    • H02G15/00—Cable fittings
    • H02G15/08—Cable junctions

Definitions

  • the invention relates to a connection of electrically insulated high-voltage conductors, comprising an electrically loaded gap between insulating parts added to said conductors, which parts consist of solid insulating material, such as casting resin, a flexible insulating filler under pressure being present in the gap.
  • FIG. 7 shows an isolating switch embedded in casting resin, the insulation of which is equipped at each end with a detachable cylindrical part so as to make the embedded parts accessible.
  • the gaps formed between these cylindrical parts and the rest of the switch insulation are filled with a liquid insulating material.
  • connection of a new type which differs from the conventional connections in that in the connection according to the invention with insulating parts having transverse dimensions remaining substantially constant over the entire length of the gap formed between them one of the insulating parts is equipped with an outer sheath of filler material, which sheath is anchored to its free end, the outer dimensions of said sheath being larger than the inner dimensions of the other insulating part, and has been inserted, together with said sheath, into the latter part so tightly that the air between the filler sheath and the insulating parts has been expelled.
  • the insulating pants are preferably constructed in such a way that the gap present between them forms a space that is closed at least at one end, while the filler sheath is kept under pressure in this space by a force derived from a compression spring.
  • the filler sheath which has to be anchored to the end of the part in question since otherwise it will be rolled back when the connection is telescoped together, may advantageously be cup-shaped, the bottom of the cup forming the anchorage.
  • the removal of the air between the bottom of the cup-shaped filler sheath and the adjacent insulating parts can be provided for by one or more special measures.
  • FIG. 1 is a cross-section of a connection of two conductors embedded in insulating material.
  • FIG. 2 is a three-phase construction of a connection between a cable not filled with oil and an embedded conductor extending beyond an insulating part.
  • FIG. 1 shows two insulating parts 1 and 2, in each of which a conductor 3 is embedded.
  • the conductors 3 are interconnected by means of a conductor 4 which may be hollow and cylindrical, for instance, said conductor 4 being enclosed in a cylindrical insulating part 5.
  • the insulating part 5 is fitted at both ends with a cup-shaped sheath 6 of flexible insulating material, such as butyl rubber, neoprene, or the like and has been inserted tightly, together with said sheaths 6, into likewise cylindrical spaces in the insulating parts 1 and 2.
  • the thickness of the material of the sheaths 6 is so chosen that the outer diameter of the part 5 with the sheath 6 fitted thereon is larger than the inner diameters of the spaces in the parts 1 and 2, in consequence of which the air between the sheaths 6 and the insulating parts 1, 2, and 5 is expelled as the connection is telescoped together.
  • the sheaths 6 are lightly greased beforehand, on the outside as well as on the inside, with silicone grease, for instance.
  • the unit is constructed in such a way that the gap is shut off on the side of the pierced part of the cup-shaped sheaths, while on the other side the sheaths are kept under pressure by a compression spring 8 mounted in that place between rings 7 fitting into the gap.
  • the insulating parts 1 and 2 each may be a part of a section of a switching device which may be separated by moving them apart.
  • the embedded conductors 3 may be connected to the supply terminals of the switch, while the conductors 4 are bus conductors connecting the conductors 3 of successive sections of the switching device.
  • the connection shown in FIG. 1 is assembled by fi-rst applying the sheaths or sleeves 6 and eventually the spring 8 on the insulating member 5 of the bu conductor 4, then placing this construction between the moved apart insulating parts 1 and 2 and finally moving these parts towards each other to the positions shown inthe figure.
  • FIG. 2 shows the conection of three cables 11, not filled with oil, with three conductors 13 extending beyond the insulating part 12 of a three-phase high voltage apparatus for instance. Wherever the connecting members between the cable cores and the conductors 13 are of no further interest for the invention, they are not shown.
  • each other against contact as well as against spark-over among the conductors each of them is surrounded by a cylindrical sleeve 14 of insulating material extending from the insulation of the conductors 13 to beyond the cable insulation.
  • the sleeves 14 have been pushed tightly on the cylindrical end portions of the insulating part 12, which have previously been fitted with lightly greased cup- Here too the air between the filler sheaths 15 and the insulating parts 12 and 14 has been expelled owing to the fact that the outer diameters of the end portions with the sheaths have been chosen larger than the inner diameters of the sleeves. .In the place where the sides of the cup-shaped filler sheaths 15 merge into the pierced bottom portion the sleeves 14 are slightly narrowed, so as to keep the sheaths pressed against the end portions.
  • the conductors 13 may be the terminals protruding from the insulating body 12 of a switching device and which are to be connected to the cables 11.
  • each connection is surrounded by a cylindrical sleeve 14. This structure is assembled by applying sheaths or sleeves 15 on the cylindrical end portions of the body 12 and sleeves 15 around the respective cables 11 and then, after the connection has been made, pushing the sleeves 14 over the sheaths 15 on the body 12.
  • each .filler sheath round the end portion in question a ring fitting into the gap and containing a compression spring.
  • the part of the sleeve enclosing the sheath may,jfor instance, also be cup-shaped, the bottom part being equipped with a raised edge which fits against the lower side of the end portion.
  • the sleeves 14 are further equipped with an outwardly extending flange 16 with which they rest on an inwardly extending part of a protective cap 17 consisting of two portions and surrounding the whole unit.
  • This cap grips about the outwardly extending flange 18 of the insulating part 12 and is kept in place by pins 19 fitted in lugs of the part 12.
  • a semi-permanent connection between electrically insulated high-voltage conductors comprising insulating parts surrounding the conductors and separated by a gap containing a member of flexible insulating material held under pressure in said gap, the insulating parts having constant transverse dimensions over the entire length of the gap formed between them, the insulating member consisting of a filler sheath in the form of a sleeve covering the inner insulating part and being anchored to the free end thereof, said sheath having outer dimensions larger than the inner dimensions of the outer insulating part, the insulating parts being joined together by compression, in the gap so that the air between this sheath and the insulating parts is permanently expelled.

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US245930A 1961-12-20 1962-12-19 Connection of electrically insulated high-voltage conductors Expired - Lifetime US3293354A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL272750 1961-12-20

Publications (1)

Publication Number Publication Date
US3293354A true US3293354A (en) 1966-12-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
US245930A Expired - Lifetime US3293354A (en) 1961-12-20 1962-12-19 Connection of electrically insulated high-voltage conductors

Country Status (3)

Country Link
US (1) US3293354A (fr)
BE (1) BE626360A (fr)
GB (1) GB1023952A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180034251A1 (en) * 2015-05-26 2018-02-01 Mitsubishi Electric Corporation Electric device and method for manufacturing electric device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2280711A (en) * 1941-04-25 1942-04-21 Machlett Lab Inc High tension apparatus
US2857557A (en) * 1953-03-06 1958-10-21 Moser Glaser & Co Ag High voltage substation
US2894054A (en) * 1954-06-25 1959-07-07 Reyrolle A & Co Ltd Voltage grading in high-voltage switchgear insulation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2280711A (en) * 1941-04-25 1942-04-21 Machlett Lab Inc High tension apparatus
US2857557A (en) * 1953-03-06 1958-10-21 Moser Glaser & Co Ag High voltage substation
US2894054A (en) * 1954-06-25 1959-07-07 Reyrolle A & Co Ltd Voltage grading in high-voltage switchgear insulation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20180034251A1 (en) * 2015-05-26 2018-02-01 Mitsubishi Electric Corporation Electric device and method for manufacturing electric device
US10033169B2 (en) * 2015-05-26 2018-07-24 Mitsubishi Electric Corporation Electric device and method for manufacturing electric device

Also Published As

Publication number Publication date
GB1023952A (en) 1966-03-30
BE626360A (fr)

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