GE UR series Instruction Manual page 260

5.5 GROUPED ELEMENTS
The
FORCE SELF-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
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
NOTE
CD or free of charge on the GE Multilin web page.
SETTING
Force Memory Polarization
Off = 0
SETTING
Distance Source
= VA, Vrms_A
= VB, Vrms_B
= VC, Vrms_C
= V_1
= IA
= IB
= IC
SETTING
Force Self Polarization
Off = 0
5
b) PHASE DISTANCE
PATH: SETTINGS GROUPED ELEMENTS
PHASE DISTANCE Z1
5-128
and settings should never be asserted simultaneously. If this happens, the logic
FORCE MEM-POLAR
Update memory
AND RUN
TIMER
| V_1 | < 1.15 pu
5 cycles
| Vrms – | V | | < Vrms / 8
AND
| Vrms – | V | | < Vrms / 8
| Vrms – | V | | < Vrms / 8
TIMER
| V_1 | > 0.80 pu
6 cycles
| IA | < 0.05 pu
AND
| IB | < 0.05 pu
| IC | < 0.05 pu
| V_1 | < 0.10 pu
Figure 5–55: MEMORY VOLTAGE LOGIC
SETTING GROUP 1(6)
PHS DIST Z1
FUNCTION: Disabled
PHS DIST Z1 DIR:
MESSAGE
Forward
PHS DIST Z1
MESSAGE
SHAPE: Mho
PHS DIST Z1 XFMR VOL
MESSAGE
CONNECTION: None
PHS DIST Z1 XFMR CUR
MESSAGE
CONNECTION: None
PHS DIST Z1
MESSAGE
REACH:
PHS DIST Z1
MESSAGE
RCA: 85°
PHS DIST Z1 REV
MESSAGE
REACH: 2.00 ohms
PHS DIST Z1 REV
MESSAGE
REACH RCA: 85°
PHS DIST Z1
MESSAGE
COMP LIMIT: 90°
PHS DIST Z1
MESSAGE
DIR RCA: 85°
L60 Line Phase Comparison System
SETTING
Memory duration
0
AND
S Q
0
R
OR
0
DISTANCE PHASE DISTANCE Z1(Z3)
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
2.00 ohms
Range: 30 to 90° in steps of 1
Range: 0.02 to 500.00 ohms in steps of 0.01
Range: 30 to 90° in steps of 1
Range: 30 to 90° in steps of 1
Range: 30 to 90° in steps of 1
5 SETTINGS
T
reset
AND
Use V_1 memory
OR
Use V_1
AND
827842A7.CDR
GE Multilin