ABB Relion REQ650, Applications Manual, Page: 155 / 340

6.14.3 Directional underpower protection GUPPDUP
6.14.3.1 Identification
Function description IEC 61850
identification
IEC 60617
identification
ANSI/IEEE C37.2
device number
Directional underpower protection GUPPDUP
P <
2
SYMBOL-LL V2 EN
37
6.14.3.2 Setting guidelines
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 shown in table 21 .
For reverse power applications PosSeq or Arone modes are strongly recommended.
Table 21: 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
(Equation 56)
Arone
* *
1 2 1 2 3 3 L L L L L L
S U I U I
= × - ×
EQUATION1698 V1 EN
(Equation 57)
PosSeq
*
3
PosSeq PosSeq
S U I
= × ×
EQUATION1699 V1 EN
(Equation 58)
L1L2
* *
1 2 1 2
( )
L L L L
S U I I
= × -
EQUATION1700 V1 EN
(Equation 59)
L2L3
* *
2 3 2 3
( )
L L L L
S U I I
= × -
EQUATION1701 V1 EN
(Equation 60)
L3L1
* *
3 1 3 1
( )
L L L L
S U I I
= × -
EQUATION1702 V1 EN
(Equation 61)
Table continues on next page
1MRK 505 291-UEN A
Section 6
Current protection
149
Application manual