ABB REQ650 Applications Manual page 152

Section 6
Current protection
146
Mode: The voltage and current used for the power measurement. The setting
possibilities are shown in table 20.
For reverse power applications PosSeq or Arone modes are strongly recommended.
Table 20: Complex power calculation
Set value Mode
L1, L2, L3
Arone
PosSeq
L1L2
L2L3
L3L1
L1
L2
L3
The function has two stages that can be set independently.
With the parameter OpMode1(2) the function can be set On/Off.
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)
Formula used for complex power calculation
* *
= × + ×
S U I U I
L 1 L 1 L 2 L 2
EQUATION1697 V1 EN
*
= × - ×
S U I U
L L 1 2 L 1 L L 2 3
EQUATION1698 V1 EN
*
= × ×
S 3 U I
PosSeq PosSeq
EQUATION1699 V1 EN
* *
= × -
S U ( I I )
L L 1 2 L 1 L 2
EQUATION1700 V1 EN
* *
= × -
S U ( I I )
L L 2 3 L 2 L 3
EQUATION1701 V1 EN
* *
= × -
S U ( I I )
L L 3 1 L 3 L 1
EQUATION1702 V1 EN
*
= × ×
S 3 U I
L 1 L 1
EQUATION1703 V1 EN
*
= × ×
S 3 U I
L 2 L 2
EQUATION1704 V1 EN
*
= × ×
S 3 U I
L 3 L 3
EQUATION1705 V1 EN
1MRK 505 291-UEN A
*
+ ×
U I
L 3 L 3
(Equation 45)
*
I
L 3
(Equation 46)
(Equation 47)
(Equation 48)
(Equation 49)
(Equation 50)
(Equation 51)
(Equation 52)
(Equation 53)
Application manual