ABB RELION RET670 - Page 594

Mode: The voltage and current used for the power measurement. The setting
possibilities are shown in table 45.
Table 45: Complex power calculation
Set value
Mode Formula used for complex power calculation
A,B,C
* * *
A B C
A B C
S V I V I V I= × + × + ×
EQUATION2038 V1 EN-US (Equation 466)
Arone
* *
A C
AB BC
S V I V I= × ×-
EQUATION2039 V1 EN-US (Equation 467)
PosSeq
*
PosSeq
PosSeq
S 3 V I= × ×
EQUATION2040 V1 EN-US (Equation 468)
A,B
*
A B
AB
*
S V (I I )= × -
EQUATION2041 V1 EN-US (Equation 469)
B,C
*
B C
BC
*
S V (I I )= × -
EQUATION2042 V1 EN-US (Equation 470)
C,A
*
C A
CA
*
S V (I I )= × -
EQUATION2043 V1 EN-US (Equation 471)
A
*
A
A
S 3 V I= × ×
EQUATION2044 V1 EN-US (Equation 472)
B
*
B
B
S 3 V I= × ×
EQUATION2045 V1 EN-US (Equation 473)
C
*
C
C
S 3 V I= × ×
EQUATION2046 V1 EN-US (Equation 474)
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)
Section 9 1MRK 504 163-UUS A
Current protection
588 Transformer protection RET670 2.2 ANSI
Application manual