ABB
Operating instructions for POLIM
©
-D surge arrester
Doc. 1HC0010173 AB
EN
15
6.2.
Replacement after overloading or damages caused by ani-
mals
Overloading during operation can lead to damaging (e.g. traces of fire, fractures) of
the surge arrester 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 re-
duce the insulation capacity of the silicone 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 surge arresters, when disconnecting device has operated.
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 af-
fect 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.
:
Do
not
use cleaning agents containing solvents besides isopropanol
:
Do
not
use abrasive equipment for cleaning.
:
Do
not
use silicone grease or silicone oil after the cleaning.
X
Clean surge arresters either with
–
warm water and soft, lint-free cloths
–
water spray with a maximum pressure of 10 bar
–
soft, lint-free cloths moistened with isopropanol (isopropyl alcohol).
Apply on the whole silicone surface
