ABB RED650 - Page 531

Set value for
parameter
“Mode”
Formula used for complex, three-
phase power calculation
Formula used for voltage and
current magnitude calculation
Comment
1 L1, L2, L3
* * *
1 1 2 2 3 3
= × + × + ×
L L L L L L
S U I U I U I
EQUATION1385 V1 EN-US (Equation 55)
1 2 3
1 2 3
( ) / 3
( ) / 3
= + +
= + +
L L L
L L L
U U U U
I I I I
EQUATION1386 V1 EN-US (Equation 56)
Used when
three phase-
to-earth
voltages are
available
2
Arone
* *
1 2 1 2 3 3
= × - ×
L L L L L L
S U I U I
EQUATION1387 V1 EN-US (Equation 57)
1 2 2 3
1 3
( ) / 2
( ) / 2
= +
= +
L L L L
L L
U U U
I I I
EQUATION1388 V1 EN-US (Equation 58)
Used when
two phase-
to-phase
voltages are
available
3
PosSeq
*
3= × ×
PosSeq PosSeq
S U I
EQUATION1389 V1 EN-US (Equation 59)
3= ×
=
PosSeq
PosSeq
U U
I I
EQUATION1390 V1 EN-US (Equation 60)
Used when
only
symmetrical
three phase
power shall
be measured
4
L1L2
* *
1 2 1 2
( )= × -
L L L L
S U I I
EQUATION1391 V1 EN-US (Equation 61)
1 2
1 2
( ) / 2
=
= +
L L
L L
U U
I I I
EQUATION1392 V1 EN-US (Equation 62)
Used when
only U
L1L2
phase-to-
phase
voltage is
available
5
L2L3
* *
2 3 2 3
( )= × -
L L L L
S U I I
EQUATION1393 V1 EN-US (Equation 63)
2 3
2 3
( ) / 2
=
= +
L L
L L
U U
I I I
EQUATION1394 V1 EN-US (Equation 64)
Used when
only U
L2L3
phase-to-
phase
voltage is
available
6
L3L1
* *
3 1 3 1
( )= × -
L L L L
S U I I
EQUATION1395 V1 EN-US (Equation 65)
3 1
3 1
( ) / 2
=
= +
L L
L L
U U
I I I
EQUATION1396 V1 EN-US (Equation 66)
Used when
only U
L3L1
phase-to-
phase
voltage is
available
7
L1
*
1 1
3= × ×
L L
S U I
EQUATION1397 V1 EN-US (Equation 67)
1
1
3= ×
=
L
L
U U
I I
EQUATION1398 V1 EN-US (Equation 68)
Used when
only U
L1
phase-to-
earth voltage
is available
Table continues on next page
1MRK 505 394-UEN A Section 15
Monitoring
Line differential protection RED650 2.2 IEC 525
Technical manual