IEC09000018-2-en.vsd
Chosen current
phasors
Chosen voltage
phasors
Complex
power
calculation
P
Derivation of
S(composant)
in Char angle
S(angle)
S(angle) <
Power1
t
TRIP1
START1
Q
P = POWRE
Q = POWIM
S(angle) <
Power2
t
TRIP2
START2
IEC09000018 V2 EN
Figure 118:
Simplified logic diagram of the power protection function
The function will use voltage and current phasors calculated in the pre-processing
blocks. The apparent complex power is calculated according to chosen formula as
shown in table
.
Table 133:
Complex power calculation
Set value:
Mode
Formula used for complex power calculation
L1, L2, L3
*
*
*
1
1
2
2
3
3
L
L
L
L
L
L
S
U
I
U
I
U
I
=
×
+
×
+
×
EQUATION1697 V1 EN
(Equation 64)
Arone
*
*
1 2
1
2 3
3
L L
L
L L
L
S
U
I
U
I
=
×
-
×
EQUATION1698 V1 EN
(Equation 65)
PosSeq
*
3
PosSeq
PosSeq
S
U
I
= ×
×
EQUATION1699 V1 EN
(Equation 66)
L1L2
*
*
1 2
1
2
(
)
L L
L
L
S
U
I
I
=
×
-
EQUATION1700 V1 EN
(Equation 67)
L2L3
*
*
2 3
2
3
(
)
L L
L
L
S
U
I
I
=
×
-
EQUATION1701 V1 EN
(Equation 68)
L3L1
*
*
3 1
3
1
(
)
L L
L
L
S
U
I
I
=
×
-
EQUATION1702 V1 EN
(Equation 69)
Table continues on next page
1MRK 502 048-UEN A
Section 8
Current protection
237
Technical manual
Summary of Contents for REG650 ANSI
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