ABB Relion 670 Series Applications Manual page 214

Section 7
Current protection
7.9.3 Setting guidelines
GlobalBaseSel: Selects the global base value group used by the function to define IBase, VBase and
SBase. Note that this function will only use IBase value.
Operation: With the parameter Operation the function can be set Enabled/Disabled.
Mode: The voltage and current used for the power measurement. The setting possibilities are shown in
table 37.
Table 37:
Set value Mode
A,B,C
Arone
PosSeq
A,B
B,C
C,A
A
B
C
The function has two stages that can be set independently.
With the parameter OpMode1(2) the function can be set Enabled/Disabled.
The function gives trip if the power component in the direction defined by the setting Angle1(2) is larger
than the set pick up power value Power1(2)
208
Complex power calculation
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Formula used for complex power calculation
* *
= × + ×
S V I V I
A A B B
EQUATION2038 V1 EN-US
*
-
= × ×
S V I V
AB A BC
EQUATION2039 V1 EN-US
*
= × ×
S 3 V I
PosSeq PosSeq
EQUATION2040 V1 EN-US
*
*
-
= × )
S V (I I
AB A B
EQUATION2041 V1 EN-US
*
*
-
= × )
S V (I I
B C
BC
EQUATION2042 V1 EN-US
*
*
-
= ×
)
S V (I I
C A
CA
EQUATION2043 V1 EN-US
*
= × ×
S 3 V I
A A
EQUATION2044 V1 EN-US
*
= × ×
S 3 V I
B B
EQUATION2045 V1 EN-US
*
= × ×
S 3 V I
C
C
EQUATION2046 V1 EN-US
1MRK 505 370-UUS Rev. K
*
+ ×
V I
C C
(Equation 60)
*
I
C
(Equation 61)
(Equation 62)
(Equation 63)
(Equation 64)
(Equation 65)
(Equation 66)
(Equation 67)
(Equation 68)
Busbar protection REB670
Application manual
SEMOD172150-4 v7