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6
Maintenance, upkeep
6.1
Safety
DANGER!
System uses high voltage.
Death, serious bodily harm and damage to the switching gear may result from an electric shock.
X
Allow only authorised professionals to perform work on the surge arrester.
X
Observe the safety rules of EN 50110-1 before working on the system:
à Disconnect the system from the power supply.
à Secure the system against being switched on again.
à Ensure that the system is de-energised.
à Earth the system and short-circuit it.
à Cover or cordon off neighbouring energised parts.
The surge arresters do not contain wearing parts and are therefore maintenance-free. Replacement
parts are not needed.
6.2
Replacement after overloading or damages caused by animals
Overloading during operation can lead to damaging (e.g. traces of fire, fractures) of the surge arres-
ter from arcs.
Minimal animal bites on the sheds of the silicone housing (e.g. by birds, martens, mice etc.) do not
hinder the functioning of the surge arrester. Heavy bites do reduce the insulation capacity of the sili-
cone housing, however.
CAUTION!
Damage to the surge arrester.
Damaged surge arresters no longer protect the switchgear.
X
Check the surge arresters visually on a regular basis to ensure that they are in sound condition.
X
Replace damaged surge arresters.
X
Keep a small percentage of installed surge arresters in reserve.
6.3
Cleaning in case of heavy pollution
Thanks to the hydrophobicity of the silicone housing, normal pollution does not affect the insulation
capacity of the housing. If pollution exceeding this is present (heavy deposit layer) the surge arrester
should be cleaned.
CAUTION!
Solvents and abrasive equipment.
Damage to the silicone housing.
X
Do not use cleaning agents containing solvents besides isopropanol.
X
Do not use abrasive equipment for cleaning.
X
Do not use silicone grease or silicone oil after the cleaning.
X
Clean surge arresters either with:
à warm water and soft, lint-free cloths
à water spray with a maximum pressure of 10 bar
à soft, lint-free cloths moistened with isopropanol (isopropyl alcohol).
Apply on the whole silicone surface.
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10
Operating instructions | EN | 1HC0076149 AC
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