6 Functions and settings
Maschinenfabrik Reinhausen GmbH 2016
143
5163667/00 EN
TRAFOGUARD® ISM®
2.
Select
Name plate
from the selection list.
ð
The name plate data is displayed.
Maintenance (optional)
The device monitors the following maintenance:
Maintenance
Description
OLTC mainte-
nance
The on-load tap-changer must be maintained in ac-
cordance with the MR standards.
OLTC replace-
ment
The on-load tap-changer must be replaced with a
new on-load tap-changer.
DSI replacement
The diverter switch insert must be replaced with a
new diverter switch insert.
Contact wear
The main switching contacts or transition contacts of
the on-load tap-changer must be replaced.
Oil change and
cleaning
The oil must be changed and the diverter switch in-
sert, oil compartment, and oil conservator must be
cleaned.
Selector mainte-
nance
The on-load tap-changer's selector must be main-
tained.
Oil sample
After maintenance: The oil must be replaced; the limit
values specified by MR for added insulating oil must
be observed.
During operation: An oil sample must be taken and
analyzed; the limit values specified by MR for added
insulating oil must be observed.
Oil filter unit
The oil filter of the oil filter unit must be replaced.
OLTC operator
interval
Maintenance interval for the on-load tap-changer de-
pendent on number of tap-change operations or time,
which the operator can specify.
Transformer op-
erator interval
Time-dependent maintenance interval for the trans-
former, which the operator can specify.
Table 32: Maintenance
6.19
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