Abstract: A test to prove the performance of extremely non-uniform polluted single unit metal oxide (MO) and gapped arresters (SiCA) is presented. The test procedure used represents the worst case condition which can occur especially under a small wetting rate and at severe polluted arrester housings. The resulting temperature increase of metal or silicon carbide varistors was measured. Internal partial discharges or internal arcing during the test were also investigated. Currents, power dissipation, voltage distribution along varistors and pollution layer and lightning sparkover voltage were measured or have been calculated.

Keyword(s): metal oxide arrester ; gapped arrester ; pollution ; partial discharge
Note: Ninth International Symposium on High Voltage Engineering, Graz, Austria, Aug-Sep, 1995, pp. 3220-1 - 3220-4.


Fulltext : http://zet10.ipee.pwr.wroc.pl/record/293/files/

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