US3542942A - High voltage cable termination - Google Patents

High voltage cable termination Download PDF

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Publication number
US3542942A
US3542942A US860918A US3542942DA US3542942A US 3542942 A US3542942 A US 3542942A US 860918 A US860918 A US 860918A US 3542942D A US3542942D A US 3542942DA US 3542942 A US3542942 A US 3542942A
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US
United States
Prior art keywords
cap
high voltage
voltage cable
assembly
band
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
US860918A
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English (en)
Inventor
Leonard A Johnson
Harold G Hervig
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
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 Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
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Publication of US3542942A publication Critical patent/US3542942A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • H02G15/02—Cable terminations
    • H02G15/06—Cable terminating boxes, frames or other structures
    • H02G15/064—Cable terminating boxes, frames or other structures with devices for relieving electrical stress
    • H02G15/068—Cable terminating boxes, frames or other structures with devices for relieving electrical stress connected to the cable shield only

Definitions

  • This invention relates to terminators for high voltage electrical cable having a conductive sheath.
  • the terminator combines a highly insulative and track-resistant elongate ceramic tube forming the body of the device with semiconductive elastic end caps for axially supporting the tube on the conductor.
  • the device therefore combines high insulative qualities with ease of assembly and application, and with economy of construction.
  • FIG. 1 is a view in elevation and largely in cross section of a preferred form of terminator as applied to a high voltage cable end
  • FIG. 2 is a section taken at line 2-2 of FIG. 1,
  • FIG. 3 is a vertical section of the lower end cap of the device of FIG. 1 prior to installation
  • FIG. 4 is a section taken approximately at line 44 of FIG. 1 of a portion of a structure similar to that of FIG. 1 but including an alternative form of encircling band and support.
  • the terminator of FIG. 1 includes an insulative externally annularly corrugated and grooved elongate porcelain ceramic tube 11 serving as the body of the device.
  • semiconductive rubbery cap 12 fits over the upper end of the body 11 and around the constricted neck portion 13, being held in place both by its natural resiliency and by an encircling metal retaining band 14, the latter serving also as a flashover band to prevent localized concentration within the semiconductive cap of any excessive voltages.
  • the neck 13 is externally grooved to form a narrow annular groove 15, and the cap 12 is preferably correspondingly annularly internally ridged, the ridge 16 fitting within the groove 15.
  • a similar groove and ridge construction is illustrated 'at the small end of the cap 12.
  • Nordel conductive ethylene-propylene terpolymer is an effective material of construction for such caps.
  • the lower end of the body 11 similarly terminates in a doubly annularly grooved neck 17 over which is applied a conical semiconductive elastic cap 18 of Nordel conductive polymer held in place by a retaining ring 19.
  • the inner surface 20 of the thickened lower portion of the cone 18 has a stress cone configuration and is grounded to the conductive sheath 21 of the cable 22 and preferably also through the ring 19 to an external ground 23 as shown.
  • the interior of the structure is preferably partially filled with a thixotropic insulating grease, in a quantity sufiicient substantially to fill all voids remaining after insertion of a cable end.
  • a thixotropic insulating grease in a quantity sufiicient substantially to fill all voids remaining after insertion of a cable end.
  • FIG. 1 shows the cable 22 from which a terminal portion of insulation 33 has been removed to expose the conductor 25.
  • Permanent contact with a terminally pierced connector element 26 is made through an intermediate compression or crimping sleeve 27, and the assembly is then pushed into and through the terminator 10 as shown.
  • the end cap 18 fits tightly about and provides conductive contact with the sheath 21, and the cap 12 similarly fits tightly about the element 26.
  • the grease contained within the assembly serves to fill most of the voids otherwise present and to assure water resistant connections at both ends.
  • the conductor 25 and element 26 are firmly held at the axis of the tube 11 and of the entire structure.
  • FIG. 3 shows the structure of the lower cap 18 prior to assembly on the tube 11 and cable 21, and in particular illustrates the location of diaphragm 28. This item is inset slightly from the smaller extremity of the cap for convenience in inserting the conductor 26, but sufficiently away from the surface 20 of the stress cone area to avoid undesirable electrical effects at that area.
  • the band 19 is shown as a continuous band in FIGS. 1 and 2, and must therefore be driven over the cap 12, the band 19' encircling the cap 18 is illustrated in FIG. 4 to be in the form of an adjustable clamp member having outturned ends 29 secured together by means of a bolt 30. Additionally, the ring 19' is supported on a bracket member 31 which may be attached to a pole or other supporting structure, e.g., by screw 32.
  • a high voltage cable terminator assembly comprising an insulative exteriorly annularly corrugated and glazed elongate ceramic tube having at each end a generally conical semiconductive rubbery cap having a larger end, encircling the end of said tube and being in turn encircled with a metal retaining band, and an open smaller end for fitting closely about a high voltage line component.

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  • Cable Accessories (AREA)
US860918A 1969-09-25 1969-09-25 High voltage cable termination Expired - Lifetime US3542942A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US86091869A 1969-09-25 1969-09-25

Publications (1)

Publication Number Publication Date
US3542942A true US3542942A (en) 1970-11-24

Family

ID=25334363

Family Applications (1)

Application Number Title Priority Date Filing Date
US860918A Expired - Lifetime US3542942A (en) 1969-09-25 1969-09-25 High voltage cable termination

Country Status (9)

Country Link
US (1) US3542942A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS4929383B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CA (1) CA920674A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH (1) CH518024A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2062580A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1318606A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
NO (1) NO129430B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
SE (1) SE377743B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
ZA (1) ZA706526B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4814583U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1971-06-28 1973-02-17
US3730970A (en) * 1971-10-04 1973-05-01 Minnesota Mining & Mfg Terminal with grease retaining members
US3777050A (en) * 1971-12-30 1973-12-04 American Esna Corp Shielding tape grounding device for high voltage cables
JPS495691U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1972-04-15 1974-01-18
US3877775A (en) * 1973-08-27 1975-04-15 Atomic Energy Commission Cable connector
US3878313A (en) * 1974-10-04 1975-04-15 Minnesota Mining & Mfg Pre-assembled cable termination
USRE28837E (en) * 1971-12-30 1976-06-01 Amerace Corporation Shielding tape grounding device for high voltage cables
US4327245A (en) * 1979-06-21 1982-04-27 Industrie Pirelli, S.P.A. Sealing end for direct current electric cables
GB2241388A (en) * 1989-12-08 1991-08-28 Pratley Investments Shroud for a cable gland
US5567230A (en) * 1995-04-05 1996-10-22 Sinclair; Hugh J. Air filter for use with aircraft ventilation systems
CN106025996A (zh) * 2016-07-25 2016-10-12 常州市拓源电缆成套有限公司 用于铁路的防水户外电缆终端
CN106207939A (zh) * 2016-07-25 2016-12-07 常州市拓源电缆成套有限公司 用于铁路的27500伏电力户外电缆终端

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3322883A (en) * 1966-05-03 1967-05-30 G & W Electric Speciality Co Prefilled cable termination system
US3377420A (en) * 1965-04-16 1968-04-09 Elastic Stop Nut Corp Device for terminating outdoor electric cables

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3377420A (en) * 1965-04-16 1968-04-09 Elastic Stop Nut Corp Device for terminating outdoor electric cables
US3322883A (en) * 1966-05-03 1967-05-30 G & W Electric Speciality Co Prefilled cable termination system

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4814583U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1971-06-28 1973-02-17
US3730970A (en) * 1971-10-04 1973-05-01 Minnesota Mining & Mfg Terminal with grease retaining members
USRE28837E (en) * 1971-12-30 1976-06-01 Amerace Corporation Shielding tape grounding device for high voltage cables
US3777050A (en) * 1971-12-30 1973-12-04 American Esna Corp Shielding tape grounding device for high voltage cables
JPS495691U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1972-04-15 1974-01-18
US3877775A (en) * 1973-08-27 1975-04-15 Atomic Energy Commission Cable connector
US3878313A (en) * 1974-10-04 1975-04-15 Minnesota Mining & Mfg Pre-assembled cable termination
US4327245A (en) * 1979-06-21 1982-04-27 Industrie Pirelli, S.P.A. Sealing end for direct current electric cables
GB2241388A (en) * 1989-12-08 1991-08-28 Pratley Investments Shroud for a cable gland
GB2241388B (en) * 1989-12-08 1994-08-17 Pratley Investments Shroud for a cable gland
US5567230A (en) * 1995-04-05 1996-10-22 Sinclair; Hugh J. Air filter for use with aircraft ventilation systems
CN106025996A (zh) * 2016-07-25 2016-10-12 常州市拓源电缆成套有限公司 用于铁路的防水户外电缆终端
CN106207939A (zh) * 2016-07-25 2016-12-07 常州市拓源电缆成套有限公司 用于铁路的27500伏电力户外电缆终端

Also Published As

Publication number Publication date
CA920674A (en) 1973-02-06
SE377743B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1975-07-21
NO129430B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-04-08
JPS4929383B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1974-08-03
GB1318606A (en) 1973-05-31
ZA706526B (en) 1971-04-28
FR2062580A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1971-06-25
DE2047840B2 (de) 1973-01-25
CH518024A (de) 1972-01-15
DE2047840A1 (de) 1971-04-01

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