Format: HTML | BibTeX | DC | EndNote | NLM | MARC | MARCXML
Published Article / ENY-ARTICLE-2008-230

Studies of Epoxy Spacers Subjected to Internal and External Partial Discharge and SF6 Byproducts

Braun, J M (Ontario Hydro Research Division, Canada) ; Chu, F Y (Ontario Hydro Research Division, Canada) ; Tyman, A (Ontario Hydro Research Division, Canada)


Abstract: Ihe reliability of gas insulated switchgear (GIS) has generally been good. However, because of the complexities involved in servicing the enclosed components, maintenance and repair times can rapidly become a serious handicap affecting substation availability, particularly at the higher voltage levels, because of the importance of high reliability of GIS for system security at the higher voltages, there is a concern over the long term ageing characteristics of GIS. Several long term ageing mechanisms have been identified. While bulk failure by electrical treeing of solid dielectrics is a recognized ageing phenomenon, failures linked to long term ageing of spacer surfaces are also coming to the fore; however the corresponding mechanism is poorly understood. Corona discharge, exposure to corrosive SF6 decomposition by-products, and particle contamination can all contribute to the surface failure mechanism(s). The objective of the present study is to develop a better understanding of this failure mechanism, to probe the effects of localized corona discharges on filled epoxies and to characterize the early phases of the internal and external surface degradation process.

Keyword(s): partial discharges ; gas insulated switchgear
Note: Proceedings of the 3rd International Conference on Conduction and Breakdown in Solid Dielectrics, Trondheim, Norway, July 3 - 6, 1989, pp. 342-346.

Fulltext :

Cited by: try citation search for ENY-ARTICLE-2008-230

Record created 2008-12-20, last modified 2008-12-21

Similar records

People who viewed this page also viewed:
(948)  Impact of Distributed Generation on Electrical Power Network - Khan, U N - ENY-ARTICLE-2008-142
(930)  Power Swing Phenomena and its Detection and Prevention - Khan, U N et al - ENY-ARTICLE-2008-140
(929)  Evaluation of compensation devices of DC arc furnaces using advanced spectrum estimation methods - Bracale, A et al - ENY-ARTICLE-2008-011
(919)  Proceedings of the Int. Conference "7th EEEIC International Workshop on Environment and Electrical Engineering" - Schwarz, H et al - ENY-PREPRINT-2008-008
(906)  Measurement of IEC Groups and Subgroups Using Advanced Spectrum Estimation Methods - Bracale, A et al - ENY-ARTICLE-2008-117

Rate this document:
Be the first to review this document.

Discuss this document:
Start a discussion about any aspect of this document.