ABB Relion Technical Manual page 538

Section 14
Monitoring
532
Set value for Formula used for complex, three-
parameter phase power calculation
"Mode"
1 A, B, C
=
S V I
A
EQUATION1561 V1 EN
2 Arone
=
S V
AB
EQUATION1563 V1 EN
3 PosSeq
= ×
S 3
EQUATION1565 V1 EN
4 AB
=
S V
AB
EQUATION1567 V1 EN
5 BC
=
S V
BC
EQUATION1569 V1 EN
6 CA
=
S V
CA
EQUATION1571 V1 EN
7 A
= ×
S 3
EQUATION1573 V1 EN
Table continues on next page
Formula used for voltage and
current magnitude calculation
× + × + ×
* * *
V I V I
V
A B B C C
=
I
EQUATION1562 V1 EN
V
× - ×
* *
I V I
A BC C
(Equation 95)
I
EQUATION1564 V1 EN
×
* V
V I
PosSeq PosSeq
(Equation 97)
I
EQUATION1566 V1 EN
( )
V
× -
* *
I I
A B
I
(Equation 99)
EQUATION1568 V1 EN
( )
V
× * - *
I I
B C
I
(Equation 101)
EQUATION1570 V1 EN
( )
V
× -
* *
I I
C A
=
I
(Equation 103)
EQUATION1572 V1 EN
× V
*
V I
A A
(Equation 105)
I
EQUATION1574 V1 EN
1MRK 502 048-UUS A
Comment
Used when three
( )
= + + phase-to-ground
V V V / 3
A B C
voltages are
( )
available
+ +
I I I / 3
A B C
Used when three
( )
= +
V V / 2 two phase-to-
AB BC phase voltages
( )
are available
= +
I I / 2
A C
(Equation 96)
Used when only
= ×
symmetrical three
3 V
PosSeq
phase power shall
be measured
=
I
PosSeq
(Equation 98)
Used when only
=
V V
AB
phase voltage is
( )
available
= +
I I / 2
A B
(Equation 100)
Used when only
=
V V
BC
phase voltage is
( )
available
= +
I I / 2
B C
(Equation 102)
Used when only
=
V V
CA
phase voltage is
( )
available
+
I I / 2
C A
(Equation 104)
Used when only
= × V
3 V
A
ground voltage is
available
=
I
A
(Equation 106)
phase-to-
AB
phase-to-
BC
phase-to-
CA
phase-to-
A
Technical manual