Dielectric properties of ETFE wiring insulation as a function of thermal exposure

Li, Li; Bowler, Nicola; Yoon, Sung Ho; Kessler, Michael R.

doi:10.1109/ceidp.2009.5377783

Cited by 2 publications

(1 citation statement)

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“…Also, a higher quantity of homocharge accumulation for a dielectric with higher permittivity can weaken the ionization process ahead of the discharges as reported in [23]. Besides, the relative permittivity of ETFE with descending trend from 2.55 at 25°C to 2.45 at 130°C (measured at 1.15 kHz in [24]) is lower than the permittivity of PEEK reported around 3.3 [25]. Taking into account the factors aforementioned, the PD continuation with a lower possibility for PEEK with respect to ETFE during the second stage of the tests on the samples can be partially associated with higher permittivity of PEEK than ETFE.…”

Section: Discussionmentioning

confidence: 92%

Temperature‐dependent partial discharge characteristics of high temperature materials at DC voltage for hybrid propulsion systems

Shahsavarian

Lents

et al. 2021

High Voltage

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The safe and reliable operation of insulation material used in key high voltage components under extreme environmental conditions represents the major concerns for manufacturers and operators of More Electric Aircrafts (MEA). Surface discharge occurring in high current carrying components in DC power system diminishes the insulation material's performance and life, especially at high-temperature conditions. Here, the surface discharge behaviour of two commonly used high-temperature insulation materials, ethylene-tetrafluoroethylene (ETFE) and polyetheretherketone (PEEK) is studied at different temperatures under ramp and DC voltages. Extracted partial discharge (PD) features are presented and the impact of voltage polarity on surface discharge propagation is discussed. Our studies reveal that, while both materials exhibit non-linear PD behaviour with respect to their electrical conductivity, ETFE generally shows PDs with higher intensity at high temperature above 100°C with a higher possibility of surface discharge due to its lower permittivity. Overall, the PD mechanism in high-temperature, DC voltage applications is explored, and a basis for the selection of high-temperature PD suppressing materials is developed.This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made.

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Section: Discussionmentioning

confidence: 92%