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7 Operation
Maschinenfabrik Reinhausen GmbH 2019
189
5163667/06 EN
ETOS
®
IM
– Ratio of the evaluated power loss
– IEC: Oil exponent
– IEEE: Oil exponent
– Increase of the upper oil temperature
– Increase of the hot-spot temperature
– IEC: k11
– Insulating paper
– Anticipated service life
To perform the hot-spot forecast, proceed as follows:
1. Go to
Information > Forecast values
.
2. Enter the desired values for
ambient temperature
and
load factor
.
3. Press the
Start calculation
button.
ð
The diagram appears.
4. Optional: Press
to save the calculated values as a csv file.
5. If required, press
Adjust values
to make changes to the values entered.
7.12.3 Setting calculation of transformer's loss of life (optional)
In order to calculate the transformer's aging rate, you need to set the follow-
ing parameters:
▪ Insulating paper
▪ Transformer age
▪ Anticipated service life
Figure 140: Relative aging rate
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