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 88:
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 122:
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 57)
Arone
*
*
1 2
1
2 3
3
L L
L
L L
L
S
U
I
U
I
=
×
-
×
EQUATION1698 V1 EN
(Equation 58)
PosSeq
*
3
PosSeq
PosSeq
S
U
I
= ×
×
EQUATION1699 V1 EN
(Equation 59)
L1L2
*
*
1 2
1
2
(
)
L L
L
L
S
U
I
I
=
×
-
EQUATION1700 V1 EN
(Equation 60)
L2L3
*
*
2 3
2
3
(
)
L L
L
L
S
U
I
I
=
×
-
EQUATION1701 V1 EN
(Equation 61)
L3L1
*
*
3 1
3
1
(
)
L L
L
L
S
U
I
I
=
×
-
EQUATION1702 V1 EN
(Equation 62)
Table continues on next page
1MRK 504 135-UEN A
Section 8
Current protection
195
Technical manual
Содержание ret650
Страница 1: ...Relion 650 series Transformer protection RET650 Technical manual ...
Страница 2: ......
Страница 40: ...34 ...
Страница 62: ...56 ...
Страница 84: ...78 ...
Страница 208: ...202 ...
Страница 353: ...Table 236 Gray code conversion IEC06000523 V1 EN 1MRK 504 135 UEN A Section 12 Control 347 Technical manual ...
Страница 376: ...370 ...
Страница 414: ...408 ...
Страница 530: ...524 ...
Страница 562: ...556 ...
Страница 620: ...614 ...
Страница 668: ...662 ...
Страница 669: ...663 ...