Parameter Values (Range) Unit Step Default Description
5=off
Transformer type
1=Single phase
2=Three phase
2=Three phase Number of phases
of the transformer
Parameter Sel
method
1=IEC
2=IEEE
3=Manual
1=IEC Transformer pa-
rameter selection
method
Ageing rate meth-
od
1=IEC
2=IEEE
1=IEC Ageing rate calcula-
tion method
Insul paper type
1=Normal
2=Upgraded
1=Normal Type of transform-
er paper insulation
Transformer rating 1.00...500.00 MVA 0.01 2.50 Rating of the trans-
former
Initial loss of life 0...1000 1 0 Initial value for
winding insulation
loss of life in
months
Hotspot Tmp rise 50.0...350.0 °C 0.1 80.0 Hotspot tempera-
ture rise over ambi-
ent at rated load
Top oil Tmp rise 50.0...350.0 °C 0.1 65.0 Top oil temperature
rise over ambient
at rated load
Current type test 0.01...2.00 xIn 0.01 1.00 Current applied in
type testing to
reach rated hot-
spot Temp
Ratio of losses 0.1...500000.0 0.1 25.0 Ratio of load losses
at rated load to no-
load losses
CT ratio correction 0.200...5.000 0.001 0.200 Current transform-
er ratio correction
factor
Oil exponent 0.10...10.00 0.01 0.10 User defined value
for oil exponent
Winding exponent 0.10...10.00 0.01 0.10 User defined value
for winding expo-
nent
Constant K11 0.01...10.00 0.01 1.00 User defined value
of thermal model
constant K11
Constant K21 0.01...10.00 0.01 1.00 User defined value
of thermal model
constant K21
Constant K22 0.01...10.00 0.01 2.00 User defined value
of thermal model
constant K22
Oil time constant 1...20000 s 1 10800 Oil time constant in
seconds
Winding Tm con-
stant
1...20000 s 1 240 Winding time con-
stant in seconds
Alarm level Age Rte 0.00...100.00 0.01 1.00 Alarm level for aver-
age ageing rate
over set time peri-
od
Table 1329: HSARSPTR Non group settings (Advanced)
Parameter
Values (Range) Unit Step Default Description
Avg Age rate period
4=DAY
5=WEEK
6=MONTH Time period over
which average age-
ing rate is calcula-
ted
Condition monitoring functions 1MRS759142 F
1396 REX640
Technical Manual
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