ABB Relion 670 Series Applications Manual page 489

1MRK 511 401-UUS F
WrnHPTmpLev1 : This setting is used to set the level 1 value for hot spot temperature warning.
WrnHPTmpLev2 : This setting is used to set the level 2 value for hot spot temperature warning. This
should be more than the
tDelayToAlarm1 : This setting is used to set the time delay for the level 1 hot spot temperature
alarm. This time setting can be less than the winding time constant. For example if the winding
time constant is 420 sec, this setting can be 400 sec.
tDelayToAlarm2 : This setting is used to set the time delay for the level 2 hot spot temperature
alarm. This should be less than time setting in
17.11.3 Setting example
17.11.3.1 Transformer Rated Data
Table 54: Transformer Rated Data
Parameter
Frequency
Rated Power
Voltage ratio
Tap changer
Winding 1 rated current
Winding 2 rated current
Winding 3 rated current
Connection Type
Cooling
p.u. Impedance
At Base
CT ratio Winding 1
CT ratio Winding 2
CT ratio Winding 3
17.11.3.2 Setting parameters for insulation loss of life calculation function (LOL1)
Table 55: Setting parameters for insulation loss of life calculation function (LOL1)
Setting
Operation
TrafoRating
TrafoType
Table continues on next page
Bay control REC670
Application manual
WrnHPTmpLev1 setting.
Value
50 Hz
500 MVA / 500 MVA / 20 MVA
415 kV / 230 kV / 20 kV
±9
696 A
1255 A
577 A
YNyn0d1
ONAF
0.120
500 MVA
1000/1 A
2000/1 A
1000/1 A
Short Description
Activation of transformer insulation
loss of life calculation function
Set the transformer rated power of the
function on which the parameters are
selected
Select the transformer number of
phases
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tDelayToAlarm1 .
Note
1.67% of 230 kV
Selected value
Enabled
500 MVA
Three phase
Section 17
Monitoring
GUID-B3AE440F-CC5E-4742-9483-8D6448A476C8 v1
GUID-6869A06A-4DDC-4FB5-AC56-5463F3709862 v1
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