Every 2 years
Expertise of busbar connections, synthetic sleeves and gaskets, insulators, insulating pads, earthing system.
Each 5 years
Following to the expertise, change the damaged parts. Proceed with electrical tests (dielectric, insulation, ohmic resistance). Check of topographic elevation of the links.
Each 10 years
Mandatory replacement : synthetic sleeves or bellows, synthetic gaskets.
Systematically repair : electrical contact surfaces (flexible laminations, braids and adaptators), including the replacement of spring washers.
According to expertise carried out : replacement of the flexible laminations or braids, replacement of the elastomer spring heads of lower insulators.
Replacement of old bolting.