Zakład Wytwórczy Aparatów Elektrycznych Sp. z o.o.
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5.2. Permitted repairs carried out by the user
Disconnector repairs performed if necessary by the user should not go beyond the adjustment of contacts and
mechanisms conditioning the proper operation of the apparatus.
More complicated repairs requiring dismantling of the disconnector can only be carried out by the manufactur-
er. The manufacturer is not responsible for the work of disconnectors repaired by the user, if the repair included
the performance of actions without consulting the manufacturer.
6. MAINTENANCE
Maintenance of the disconnector is recommended to be carried out after each inspection.
The scope of maintenance includes:
- cleaning insulators using such tools and cleaning substances that do not cause damage to their surface. For
cleaning shoud be used a soft, lint-free cloth.
- lubrication of main contacts with acid-free vaseline (or other conductive grease);
- replacement of contacts in the case when the surfaces of their mutual contact are significantly damaged;
- tightening of loose screw connections if needed;
- complement of damaged protective coatings.
6.1. Regular tests
After the inspection, maintenance and possible repair of the disconnector, each time it is necessary to check
the correctness of apparatus mechanical action and if necessary - perform adequate adjustment of mecha-
nisms. It is also recommended, especially in the case of doubts regarding the assessment of surface damage
of the main contacts at places of their mutual contact, to additionally check the resistance of the main current
path. This is especially important for disconnectors that conduct continuous currents with values close to their
rated current. The measured resistances should not exceed the values given in the following table 1.
Measurements of resistance of disconnector's current path and isolation should be carried out in accord-
ance with the regulations in force in the power industry.
