A surge arrester connected to a laboratory analogue of an isolated distribution line or cable with trapped charge has been tested for its performance against lightning surges. The line/cable system has been substituted by an equivalent capacitance which has been previously charged from a direct-voltage source. A single-stage capacitor bank is triggered to provide a lightning impulse test current. Both the discharge current and the residual voltage across the arrester were measured. Such tests have been performed upon different metal-oxide arresters of the same rating. Variable results were found. In some cases the residual voltage at peak current was found to be significantly influenced by the pre-conditioning caused by trapped charge.
|Number of pages||4|
|Publication status||Published - 1994|
|Event||Proceedings of the 29th Universities Power Engineering Conference. Part 2 (of 2) - Galway, Irel|
Duration: Sept 14 1994 → Sept 16 1994
|Other||Proceedings of the 29th Universities Power Engineering Conference. Part 2 (of 2)|
|Period||9/14/94 → 9/16/94|
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