GE UR series

5-128 L60 Line Phase Comparison System GE Multilin
5.5 GROUPED ELEMENTS 5 SETTINGS
5
The FORCE SELF-POLAR and FORCE MEM-POLAR settings should never be asserted simultaneously. If this happens, the logic
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.
The distance zones of the L60 are identical to that of the UR-series D60 Line Distance Relay. For additional infor-
mation on the L60 distance functions, please refer to Chapter 8 of the D60 manual, available on the GE EnerVista
CD or free of charge on the GE Multilin web page.
Figure 5–55: MEMORY VOLTAGE LOGIC
b) PHASE DISTANCE
PATH: SETTINGS ÖØ GROUPED ELEMENTS Ö SETTING GROUP 1(6) ÖØ DISTANCE ÖØ PHASE DISTANCE Z1(Z3)
 PHASE DISTANCE Z1

PHS DIST Z1
FUNCTION: Disabled
Range: Disabled, Enabled
MESSAGE
PHS DIST Z1 DIR:
Forward
Range: Forward, Reverse, Non-directional
MESSAGE
PHS DIST Z1
SHAPE: Mho
Range: Mho, Quad
MESSAGE
PHS DIST Z1 XFMR VOL
CONNECTION: None
Range: None, Dy1, Dy3, Dy5, Dy7, Dy9, Dy11, Yd1, Yd3,
Yd5, Yd7, Yd9, Yd11
MESSAGE
PHS DIST Z1 XFMR CUR
CONNECTION: None
Range: None, Dy1, Dy3, Dy5, Dy7, Dy9, Dy11, Yd1, Yd3,
Yd5, Yd7, Yd9, Yd11
MESSAGE
PHS DIST Z1
REACH: 2.00 ohms
Range: 0.02 to 500.00 ohms in steps of 0.01
MESSAGE
PHS DIST Z1
RCA: 85°
Range: 30 to 90° in steps of 1
MESSAGE
PHS DIST Z1 REV
REACH: 2.00 ohms
Range: 0.02 to 500.00 ohms in steps of 0.01
MESSAGE
PHS DIST Z1 REV
REACH RCA: 85°
Range: 30 to 90° in steps of 1
MESSAGE
PHS DIST Z1
COMP LIMIT: 90°
Range: 30 to 90° in steps of 1
MESSAGE
PHS DIST Z1
DIR RCA: 85°
Range: 30 to 90° in steps of 1
NOTE
NOTE
827842A7.CDR
Use V_1
Use V_1 memory
AND
AND
OR
AND
AND
SQ
R
RUN
Update memory
SETTING
Off=0
Force Memory Polarization
|V_1|<1.15pu
|Vrms–|V||<Vrms/8
|Vrms–|V||<Vrms/8
|Vrms–|V||<Vrms/8
|V_1|>0.80pu
|IA|<0.05pu
|IB|<0.05pu
SETTING
Off=0
Force Self Polarization
SETTING
= VA, Vrms_A
= VB, Vrms_B
Distance Source
= VC, Vrms_C
= V_1
=IA
=IB
=IC
|IC|<0.05pu
|V_1|<0.10pu
TIMER
5 cycles
0
TIMER
6 cycles
0
AND
AND
OR
SETTING
Memory duration
0
T
reset