Dielectric strength measurement for different materials during dry band arcing and flashover

Adeel Ahmad, Azam Nekahi, Arshad Khan

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The polymer insulators are gaining significant importance and become primitive choice in high voltage power transmission system. However, due to organic nature of these insulators, aging and degradation seems to be significant under the polluted environment. The formation of pollution layer is one of the major causes of this degradation activity which causes the unequal field distribution around the insulator string. The aim of this paper is to comparatively analyze the dielectric strength during dry arcing band and flashover performance of silicon rubber with polyethylene, epoxy resin and EPDM based polymer insulators. For this purpose, these polymer insulators are modelled and simulated on COMSOL Multiphysics, a finite element-based software, and a uniform layer with 3mm thickness of solid water as pollution has been added on their surface. Then, their dielectric strength during dry bands arcing by creating the dry bands of 5 cm on different surface locations has been analyzed and compared. After that the dielectric strength during flashover, non-uniform or sharp edges of pollution layers are designed on the sheds of polymer insulators has been compared and analyze. The results show a promising trend in terms of quantifying the distribution of electric filed and can further be used as a base model to analyze them to do further investigation.

Original languageEnglish
Title of host publication2022 IEEE 4th International Conference on Dielectrics (ICD)
Number of pages5
ISBN (Electronic)9781665418331
ISBN (Print)9781665418348
Publication statusPublished - 29 Aug 2022
EventIEEE 2022 International Conference on Dielectrics - University of Palermo and online, Palermo, Italy
Duration: 3 Jul 20227 Jul 2022
https://ieee-icd.org/ (Link to conference website)

Publication series

NameICD 2022 - IEEE 2022 4th International Conference on Dielectrics, Proceedings


ConferenceIEEE 2022 International Conference on Dielectrics
Abbreviated titleICD 2022
Internet address


  • Dry band arc
  • Ethylene Propylene Diene Monomer (EPDM)
  • flash over
  • silicon rubber (SIR)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Polymers and Plastics


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