ABB RELION REX640 Technical Manual page 1396

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