Parameter
Value
Note
CT ratio Winding 1
1000/1 A
CT ratio Winding 2
2000/1 A
CT ratio Winding 3
1000/1 A
18.11.3.2
Setting parameters for insulation loss of life calculation function (LOL1)
GUID-6869A06A-4DDC-4FB5-AC56-5463F3709862 v1
Table 74:
Setting parameters for insulation loss of life calculation function (LOL1)
Setting
Short Description
Selected value
Operation
Activation of transformer insulation loss
of life calculation function
Enabled
TrafoRating
Set the transformer rated power of the
function on which the parameters are
selected
500 MVA
TrafoType
Select the transformer number of phases
Three phase
NoOfWindings
Select the transformer number of
windings
Three winding
ConstSelection
Select the standard from which the
transformer parameters should be taken
IEC
CurrSelectMode
Select the method for the determination
of current on which the load factor needs
to be calculated
Maximum
TempeUnitMode
Select the unit of temperature should be
used in the function
°C
AvailableCT
Select the available CT connections on
the windings
All windings
RatedVoltageW1
Set the winding 1 rated nominal voltage
415.0 kV
RatedVoltageW2
Set the winding 2 rated nominal voltage
230.0 kV
RatedVoltageW3
Set the winding 3 rated nominal voltage
20.0 kV
UPerTap
Set the voltage increment or decrement
between two successive tap positions
Tap changer is with
winding 2 and it is
mentioned that
voltage difference
1.67 % of winding 2
rated voltage.
3.84 kV
OilTmConstMode
Select the transformer oil time constant
mode of input to the function
Standard
OilTimeConst
Set the transformer oil time constant
when the oil time constant mode is
selected as
User defined
9000.0 sec
Table continues on next page
Section 18
1MRK 504 163-UUS A
Monitoring
914
Transformer protection RET670 2.2 ANSI
Application manual
Summary of Contents for RELION RET670
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