5 SETTINGS
The distance zones can be forced to become self-polarized through the
dition (FlexLogic operand) can be configured to force self-polarization. When the selected operand is asserted (logic 1), the
distance functions become self-polarized regardless of other memory voltage logic conditions. When the selected operand
is de-asserted (logic 0), the distance functions follow other conditions of the memory voltage logic as shown below.
The distance zones can be forced to become memory-polarized through the
condition (any FlexLogic operand) can be configured to force memory polarization. When the selected operand is asserted
(logic 1), the distance functions become memory-polarized regardless of the positive-sequence voltage magnitude at this
time. When the selected operand is de-asserted (logic 0), the distance functions follow other conditions of the memory volt-
age logic.
The
and
FORCE SELF-POLAR
FORCE MEM-POLAR
will give higher priority to forcing self-polarization as indicated in the logic below. This is consistent with the overall philoso-
phy of distance memory polarization.
The memory polarization cannot be applied permanently but for a limited time only; the self-polarization may be
applied permanently and therefore should take higher priority.
NOTE
SETTING
Force Memory Polarization
Off = 0
SETTING
| V_1 | < 1.15 pu
Distance Source
= VA, Vrms_A
| Vrms – | V | | < Vrms / 8
= VB, Vrms_B
| Vrms – | V | | < Vrms / 8
| Vrms – | V | | < Vrms / 8
= VC, Vrms_C
= V_1
| V_1 | > 0.80 pu
= IA
| IA | < 0.05 pu
= IB
| IB | < 0.05 pu
| IC | < 0.05 pu
= IC
| V_1 | < 0.10 pu
SETTING
Force Self Polarization
Off = 0
b) PHASE DISTANCE
PATH: SETTINGS
GROUPED ELEMENTS
PHASE DISTANCE Z1
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
GE Multilin
settings should never be asserted simultaneously. If this happens, the logic
Update memory
AND
RUN
TIMER
5 cycles
AND
0
TIMER
6 cycles
AND
OR
0
Figure 5–51: MEMORY VOLTAGE LOGIC
SETTING GROUP 1(6)
DISTANCE
PHS DIST Z1
FUNCTION: Disabled
PHS DIST Z1 DIR:
Forward
PHS DIST Z1
SHAPE: Mho
PHS DIST Z1 XFMR VOL
CONNECTION: None
PHS DIST Z1 XFMR CUR
CONNECTION: None
PHS DIST Z1
REACH:
2.00 ohms
PHS DIST Z1
RCA: 85°
PHS DIST Z1 REV
REACH: 2.00 ohms
D30 Line Distance Protection System
5.6 GROUPED ELEMENTS
setting. Any user-selected con-
FORCE SELF-POLAR
setting. Any user-selected
FORCE MEM-POLAR
SETTING
Memory duration
0
AND
T
reset
S Q
AND
R
AND
PHASE DISTANCE Z1(Z5)
Range: Disabled, Enabled
Range: Forward, Reverse, Non-directional
Range: Mho, Quad
Range: None, Dy1, Dy3, Dy5, Dy7, Dy9, Dy11, Yd1, Yd3,
Yd5, Yd7, Yd9, Yd11
Range: None, Dy1, Dy3, Dy5, Dy7, Dy9, Dy11, Yd1, Yd3,
Yd5, Yd7, Yd9, Yd11
Range: 0.02 to 500.00 ohms in steps of 0.01
Range: 30 to 90° in steps of 1
Range: 0.02 to 500.00 ohms in steps of 0.01
Use V_1 memory
5
OR
Use V_1
827842A7.CDR
5-123