Cristin-resultat-ID: 1047551
Sist endret: 9. september 2013, 10:41
NVI-rapporteringsår: 2013
Resultat
Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
2013

Axial Water Ingress MV XLPE Cable Designs with Watertight Barrier

Bidragsytere:
  • Knut Brede Liland
  • Svein Magne Hellesø
  • Sverre Hvidsten
  • Karl Magnus Bengtsson og
  • Arve Ryen

Bok

Proceedings of the 23rd Nordic Insulation Symposium - NORDI-IS13
ISBN:
  • 978-82-321-0274-7

Utgiver

Akademika forlag
NVI-nivå 1

Om resultatet

Vitenskapelig Kapittel/Artikkel/Konferanseartikkel
Publiseringsår: 2013
Sider: 197 - 201
ISBN:
  • 978-82-321-0274-7

Klassifisering

Fagfelt (NPI)

Fagfelt: Elektrofag
- Fagområde: Realfag og teknologi

Beskrivelse Beskrivelse

Tittel

Axial Water Ingress MV XLPE Cable Designs with Watertight Barrier

Sammendrag

Humidity can enter the insulation system when the outer sheath of a cable becomes damaged. The relative humidity can then increase above a critical value (70 % RH), facilitating initiation and growth of water trees. The purpose of this experimental and numerical work is to determine how fast water vapour will diffuse axially in a soaked cable with a damaged outer sheath. Before drying (evacuation) relative humidity and temperature sensors were placed within the outer sheath at different axial positions. After the drying process a hole was cut at the cable end facilitating water ingress. Numerical calculations of axial water diffusion were performed using Comsol. The numerical calculations show that the axial water vapour diffusion in the cable is slow and dependent of the air gap close to the swelling tape. After 430 days the measured humidity at 0.5 m had increased by about 75 % (initial 20%), and the sensor at 1 m had increased by 40%. Numerical calculations show a slower increase in the relative humidity. The actual axial liquid water penetration extensions, is yet not determined. The numerical calculations show that this is an important factor, as the calculations seem to be in more agreement with measurements when adjusting the position of the water front.

Bidragsytere

Knut Brede Liland

  • Tilknyttet:
    Forfatter
    ved Elkraftteknologi ved SINTEF Energi AS

Svein Magne Hellesø

  • Tilknyttet:
    Forfatter
    ved Elkraftteknologi ved SINTEF Energi AS

Sverre Hvidsten

  • Tilknyttet:
    Forfatter
    ved Elkraftteknologi ved SINTEF Energi AS

Karl Magnus Bengtsson

  • Tilknyttet:
    Forfatter
    ved Nexans Norway AS

Arve Ryen

  • Tilknyttet:
    Forfatter
    ved Nexans Norway AS
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Resultatet er en del av Resultatet er en del av

Proceedings of the 23rd Nordic Insulation Symposium - NORDI-IS13.

NTNU, Institutt for elkraftteknikk. 2013, Akademika forlag. Vitenskapelig antologi/Konferanseserie
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