Underpower protection
Overpower protection
Q
Q
P
P
Operating point
without
turbine torque
Margin
Margin
Operate
Line
Operate
Line
Operating point
without
turbine torque
IEC09000019-2-en.vsd
IEC09000019 V2 EN-US
Figure 292: Reverse power protection with underpower or overpower protection
8.11.3
Setting guidelines
SEMOD172134-4 v7
GlobalBaseSel: Selects the global base value group used by the function to define (IBase),
(
UBase) and (SBase).
Operation: With the parameter Operation the function can be set On/Off.
Mode: The voltage and current used for the power measurement. The setting possibilities are
Table 39: Complex power calculation
Set value
Mode
Formula used for complex power calculation
L1, L2, L3
*
*
*
1
1
2
2
3
3
L
L
L
L
L
L
S
U
I
U
I
U
I
=
×
+
×
+
×
EQUATION1697 V1 EN-US
(Equation 508)
Arone
*
*
1 2
1
2 3
3
L L
L
L L
L
S
U
I
U
I
=
×
-
×
EQUATION1698 V1 EN-US
(Equation 509)
PosSeq
*
3
PosSeq
PosSeq
S
U
I
= ×
×
EQUATION1699 V1 EN-US
(Equation 510)
L1L2
*
*
1 2
1
2
(
)
L L
L
L
S
U
I
I
=
×
-
EQUATION1700 V1 EN-US
(Equation 511)
L2L3
*
*
2 3
2
3
(
)
L L
L
L
S
U
I
I
=
×
-
EQUATION1701 V1 EN-US
(Equation 512)
L3L1
*
*
3 1
3
1
(
)
L L
L
L
S
U
I
I
=
×
-
EQUATION1702 V1 EN-US
(Equation 513)
L1
*
1
1
3
L
L
S
U
I
= ×
×
EQUATION1703 V1 EN-US
(Equation 514)
L2
*
2
2
3
L
L
S
U
I
= ×
×
EQUATION1704 V1 EN-US
(Equation 515)
L3
*
3
3
3
L
L
S
U
I
= ×
×
EQUATION1705 V1 EN-US
(Equation 516)
Section 8
1MRK 505 343-UEN B
Current protection
452
Application manual
Содержание Relion 670 series
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