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7 Operation
Maschinenfabrik Reinhausen GmbH 2019
236
5163667/06 EN
ETOS
®
IM
Maintenance
Description
OLTC operator inter-
val
Maintenance interval for the on-load tap-changer; the interval
depends on the number of tap-change operations or on time,
and the operator can specify it.
Transformer opera-
tor interval
Time-dependent maintenance interval for the transformer,
which the operator can specify.
Table 62: Maintenance tasks
7.20.1 Setting operator interval for OLTC maintenance
You can define the maintenance interval of your choice for the on-load tap-
changer. You can define the maintenance interval as dependent on time
and/or number of tap-change operations. If the limit is reached (100 %), the
device triggers an event message (red).
Figure 181: Operator maintenance on OLTC
Interval type
You can use this parameter to define the interval type for OLTC mainte-
nance or to deactivate maintenance. You can select the following options:
▪ Deactivated: The maintenance interval is deactivated.
▪ Time: The maintenance interval is dependent on time.
▪ Counter: The maintenance interval is dependent on number of tap-change
operations.
▪ Time and counter: The maintenance interval is dependent on time and
number of tap-change operations. The limit reached first triggers the
event.
Number of tap-change operations
You can use this parameter to define the reading of the tap-change opera-
tion counter at which the device is to issue an event message.
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