ABB REB670 Applications Manual page 237

1MRK 505 370-UUS A
Busbar protection REB670 2.2 ANSI
Application manual
Mode: The voltage and current used for the power measurement. The setting
possibilities are shown in table 34.
Table 34: Complex power calculation
Mode
Set value
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)
Current protection
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
CA C A
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
Section 7
*
+ ×
V I
C C
(Equation 55)
*
I
C
(Equation 56)
(Equation 57)
(Equation 58)
(Equation 59)
(Equation 60)
(Equation 61)
(Equation 62)
(Equation 63)
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