FR2371804A1 - Medium tension radial field electric cable with resin-contg. coating - having uniform electric field at extremity to obviate electric discharges during use - Google Patents

Medium tension radial field electric cable with resin-contg. coating - having uniform electric field at extremity to obviate electric discharges during use

Info

Publication number
FR2371804A1
FR2371804A1 FR7634701A FR7634701A FR2371804A1 FR 2371804 A1 FR2371804 A1 FR 2371804A1 FR 7634701 A FR7634701 A FR 7634701A FR 7634701 A FR7634701 A FR 7634701A FR 2371804 A1 FR2371804 A1 FR 2371804A1
Authority
FR
France
Prior art keywords
electric
semi
coating
cable
electric field
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.)
Granted
Application number
FR7634701A
Other languages
French (fr)
Other versions
FR2371804B1 (en
Inventor
Paul
Gilbert Ballet
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.)
Societe Anonyme de Telecommunications SAT
Original Assignee
Societe Anonyme de Telecommunications SAT
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 Societe Anonyme de Telecommunications SAT filed Critical Societe Anonyme de Telecommunications SAT
Priority to FR7634701A priority Critical patent/FR2371804A1/en
Publication of FR2371804A1 publication Critical patent/FR2371804A1/en
Application granted granted Critical
Publication of FR2371804B1 publication Critical patent/FR2371804B1/fr
Granted legal-status Critical Current

Links

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
    • 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

Landscapes

  • Testing Relating To Insulation (AREA)

Abstract

The end of a radial-field medium-tension electricity cable consists of is not 1 metallic core, an insulating envelope, a semi-conducting envelope a metallic screen which is uncovered up to a short distance from the semi-conducting envelope (the latter itself being uncovered w.r.t. the insulating envelope along a length detd. by the operational voltage), and possible an exterior protective sheath. To reduce the impedance near to the end of the semi-conducting layer, a high-permittivity coating is deposited on the end of the cable in the vicinity of the semi-conducting layer. The system produces a more uniform electric field along the end of the cable. This is desirable when preparing such cables for adaptation to others, since otherwise there is a concn. of the electric field in these areas, creating insulating zones along the insulating layer and leading to the danger of electrical discharges during use. Previous methods have not overcome this problem, the present method does so by reducing the electric field by deposition of a crating with specific electrical and chemical props. The coating pref. contains epoxy, polyester, or polyurethane resin and may be fixed by e.g. polyethylene or polypropylene grill.
FR7634701A 1976-11-18 1976-11-18 Medium tension radial field electric cable with resin-contg. coating - having uniform electric field at extremity to obviate electric discharges during use Granted FR2371804A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7634701A FR2371804A1 (en) 1976-11-18 1976-11-18 Medium tension radial field electric cable with resin-contg. coating - having uniform electric field at extremity to obviate electric discharges during use

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7634701A FR2371804A1 (en) 1976-11-18 1976-11-18 Medium tension radial field electric cable with resin-contg. coating - having uniform electric field at extremity to obviate electric discharges during use

Publications (2)

Publication Number Publication Date
FR2371804A1 true FR2371804A1 (en) 1978-06-16
FR2371804B1 FR2371804B1 (en) 1981-08-07

Family

ID=9180042

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7634701A Granted FR2371804A1 (en) 1976-11-18 1976-11-18 Medium tension radial field electric cable with resin-contg. coating - having uniform electric field at extremity to obviate electric discharges during use

Country Status (1)

Country Link
FR (1) FR2371804A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2454205A2 (en) * 1978-11-21 1980-11-07 Pirelli Treficable Variable-resistance elastomer compsn. - for protecting and insulating ends of high voltage cables
FR2518837A1 (en) * 1981-12-18 1983-06-24 Fabrication Cables Elect Cie G HV radial field electric cable end preparation - using high permittivity insulating layers formed of heat shrinking polyethylene covered by nonlinear semiconductor coating
DE3712922A1 (en) * 1987-04-16 1988-11-03 Kabelmetal Electro Gmbh Hollow, article of plastic which recovers its shape under the effect of heat and process for applying an adhesive coating to the inner surface of the same
WO1998027631A1 (en) * 1996-12-16 1998-06-25 Minnesota Mining And Manufacturing Company Stress control for termination of a high voltage cable
US5804630A (en) * 1995-09-06 1998-09-08 Minnesota Mining And Manufacturing Company Epihalohydrin electrical stress controlling material
US6015629A (en) * 1995-09-06 2000-01-18 3M Innovative Properties Company Stress control for termination of a high voltage cable

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2454205A2 (en) * 1978-11-21 1980-11-07 Pirelli Treficable Variable-resistance elastomer compsn. - for protecting and insulating ends of high voltage cables
FR2518837A1 (en) * 1981-12-18 1983-06-24 Fabrication Cables Elect Cie G HV radial field electric cable end preparation - using high permittivity insulating layers formed of heat shrinking polyethylene covered by nonlinear semiconductor coating
DE3712922A1 (en) * 1987-04-16 1988-11-03 Kabelmetal Electro Gmbh Hollow, article of plastic which recovers its shape under the effect of heat and process for applying an adhesive coating to the inner surface of the same
US5804630A (en) * 1995-09-06 1998-09-08 Minnesota Mining And Manufacturing Company Epihalohydrin electrical stress controlling material
US6015629A (en) * 1995-09-06 2000-01-18 3M Innovative Properties Company Stress control for termination of a high voltage cable
US6340794B1 (en) 1995-09-06 2002-01-22 Minnesota Mining And Manufacturing Company Stress control for termination of a high voltage cable
WO1998027631A1 (en) * 1996-12-16 1998-06-25 Minnesota Mining And Manufacturing Company Stress control for termination of a high voltage cable

Also Published As

Publication number Publication date
FR2371804B1 (en) 1981-08-07

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Legal Events

Date Code Title Description
ST Notification of lapse