ABB Relion REG670, Applications Manual

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Parameter Value Note
Tap changer ±9 1.67% of 230 kV
Winding 1 rated current 696 A
Winding 2 rated current 1255 A
Winding 3 rated current 577 A
Connection Type YNyn0d1
Cooling ONAF
p.u. Impedance 0.120
At Base 500 MVA
CT ratio Winding 1 1000/1 A
CT ratio Winding 2 2000/1 A
CT ratio Winding 3 1000/1 A
17.10.3.2 Setting parameters for insulation loss of life calculation function (LOL1)
Table 73: 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
On
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
Table continues on next page
Section 17
1MRK 502 071-UEN -
Monitoring
666 Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062
Application manual