INMR Volume 21 - Number 2 (Issue 100) | Page 64

Photo: INMR ©

I This

Eskom line near coast still equipped with porcelain long rods but apparently operates at lower voltage than design limit.
“ Many design engineers worldwide thought that IEC 61109 Annex C was sufficient to guide insulator specification at voltages of 132 kV and below, as at higher transmission voltages. But we quickly found that it was simply not applicable to our service environment.”
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