Abstract
The results of tests on 800 kV toughened glass post insulators are presented and analytical study to define their dynamic behavior when associated with connections and a supporting chassis under extreme service conditions (earthquake, short-circuit) is described. The findings show that the performance of toughened glass post insulators under high-amplitude dynamic loads permits even the most stringent specifications to be satisfied with a high safety margin. Under forced vibrations, the acceleration at the top of the insulator necessary to cause breakage was 5.6 g (g=9.81 m/s/sup 2/), which is at least three times larger than that required by specifications for Venezuela and the US West Coast.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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