ABB RES670 Applications Manual page 174

Section 8
Current protection
168
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 19.
Table 19: 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-US
*
= × - ×
S U I U
L L 1 2 L 1 L L 2 3
EQUATION1698 V1 EN-US
*
= × ×
S 3 U I
PosSeq PosSeq
EQUATION1699 V1 EN-US
* *
= × -
S U ( I I )
L L 1 2 L 1 L 2
EQUATION1700 V1 EN-US
* *
= × -
S U ( I I )
L L 2 3 L 2 L 3
EQUATION1701 V1 EN-US
* *
= × -
S U ( I I )
L L 3 1 L 3 L 1
EQUATION1702 V1 EN-US
*
= × ×
S 3 U I
L 1 L 1
EQUATION1703 V1 EN-US
*
= × ×
S 3 U I
L 2 L 2
EQUATION1704 V1 EN-US
*
= × ×
S 3 U I
L 3 L 3
EQUATION1705 V1 EN-US
Phasor measurement unit RES670 2.2 IEC
1MRK 511 407-UEN C
*
+ ×
U I
L 3 L 3
(Equation 69)
*
I
L 3
(Equation 70)
(Equation 71)
(Equation 72)
(Equation 73)
(Equation 74)
(Equation 75)
(Equation 76)
(Equation 77)
Application manual