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Examination of Longitudinal AC Breakdown Strength of Dielectric Surfaces as a function of Elastic Modulus

Examination of Longitudinal AC Breakdown Strength of Dielectric Surfaces as a function of Elastic Modulus

Kategori
Vitenskapelig artikkel
Sammendrag
This paper examines the influence of the elastic modulus
of the polymer insulation on the tangential AC breakdown
strength (BDS) of polymer interfaces theoretically
and experimentally. In the experiments, four different
materials with different elastic moduli, namely crosslinked
polyethylene (XLPE), cured end product of epoxy
resin (EPOXY), polyether ether ketone (PEEK) and silicone
rubber (SiR) were employed under various contact
pressures. The BDS of each interface increased as the
contact pressure was augmented. As the contact pressure
became threefold, the interfacial BDS rose by a factor of
2:4, 1:7, 1:8, and 1:4 in the case of the PEEK, EPOXY,
XLPE and SiR interface, in a sequence following the decrease
of the elastic modulus. Under the same contact
pressure, it was observed that the lower the elastic modulus,
the higher the BDS. The employed contact theory
also suggested a decreasing BDS as the modulus was augmented; however, the experimental results tended to deviate
widely from the estimated results as the pressure was
significantly increased.
Oppdragsgiver
  • Research Council of Norway (RCN) / 228344
Språk
Engelsk
Forfatter(e)
Institusjon(er)
  • Norges teknisk-naturvitenskapelige universitet
  • SINTEF Energi AS / Elkraftteknologi
År
2017
Publisert i
Proceedings of the Nordic Insulation Symposium
ISSN
2535-3969
Årgang
25
Hefte nr.
1