INMag
3I0Enable_PG
3I0BLK_PP
Imin
Residual
current
based
PhSel.
PP
PE
I3P
V3P
R,X
settings
PP
PE
Enable
21
enable
I_A
R
IPELm
Pickup
Iph
Pickup_N
50/51
enable
Relative
current
based
PP
release
detection
IPELm
OR
RELPHLmn
AND
STZPHLmn
STZPHLm
LEPHLm
LEPHLmn
OR
IRELPE
IRELPP
OR
AND
AND
AND
AND
PHSLmn
PHSLm
b1
–
b3
T
F
PHSELZ
DLECND
63
PHPH_FLT
PHG_FLT
b4
–
b6
word
Binary
to
word
Binary
to
word
b1
–
b3
b4
–
b6
word
Set
lev
el
R
X
ANSI18000010-1-en.vsdx
m
=
AG,
BG,
CG
mn
=
AB,
BC,
CA
ANSI18000010 V1 EN-US
Figure 91: General phase-selection logic diagram
Figure
presents schematically the creation of the phase-to-phase and phase-to-ground
operating conditions. Consider only the corresponding part of measuring and logic circuits, when
only a phase-to-ground or phase-to-phase measurement is available within the IED.
ANSI09000149-4-en.vsd
AND
AND
AND
Bool to
integer
DLECND
STPG
STPP
IRELPG
IRELPP
BLOCK
AND
0
20ms
0
10ms
0
15ms
0
15ms
0
3
I
IMinPUPG
0
max
3 0
_
3
100
I BLK
PP
I
Iph
0
3
0.5
I
IMinPUPG
0
3 0
_
3
100
max
I Enable
PG
I
Iph
21 enable
LDEblock
AND
ANSI09000149 V4 EN-US
Figure 92: Phase-to-phase and phase-to-ground operating conditions (residual current
criteria)
A special attention is paid to correct phase selection at evolving faults. A DLECND output signal is
created as a combination of the load encroachment characteristic and current criteria, refer to
figure
. This signal can be configured to STCND functional input signals of the distance
Section 7
1MRK 502 066-UUS B
Impedance protection
210
Technical manual
Содержание Relion 670 series
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