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Minimum approach distance calculation for save live works in presence of line composite insulators according to IEC 61472 criteria

pubblicazioni - Memoria

Minimum approach distance calculation for save live works in presence of line composite insulators according to IEC 61472 criteria

Activity carried out to prepare proposal for the maintenance of IEC Standard 61472 are described. Laboratory tests permitted to define a distance calculation method to be applied to composite insulators, similar to that prescribed by the Standard for cap and pin insulators.

The behaviour of damaged composite insulators was considered, their electromechanical residual performances were assessed and the length and position of damages still allowing safe Live Line Works were determined. Some considerations about the effectiveness of diagnostic methods in detection of damaged insulators are also given, based on laboratory and field tests on artificially damaged insulators.

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