5-196
G60 Generator Protection System
GE Multilin
5.6 GROUPED ELEMENTS
5 SETTINGS
5
Figure 5–92: NEUTRAL DIRECTIONAL OVERCURRENT LOGIC
5.6.8 GROUND CURRENT
a) MAIN MENU
PATH: SETTINGS
GROUPED ELEMENTS
SETTING GROUP 1(6)
GROUND CURRENT
The G60 relay contains one Ground Time Overcurrent, one Ground Instantaneous Overcurrent, and six Restricted Ground
Fault elements. Refer to Inverse Time Overcurrent Characteristics on page 5–179 for additional information.
GROUND CURRENT
GROUND TOC1
MESSAGE
GROUND IOC1
MESSAGE
RESTRICTED GROUND
FAULT 1
↓
MESSAGE
RESTRICTED GROUND
FAULT 6
FLEXLOGIC OPERAND
FLEXLOGIC OPERAND
SETTING
SETTING
SETTING
SETTING
SETTINGS
SETTING
SETTING
NEUTRAL DIR OC1
FUNCTION:
NEUTRAL DIR OC1
SOURCE:
NEUTRAL DIR OC1 POL
VOLT:
NEUTRAL DIR OC1 OP
CURR:
NEUTRAL DIR OC1
POLARIZING:
NEUTRAL DIR OC1 BLK:
NEUTRAL DIR OC1 FWD
LIMIT ANGLE:
NEUTRAL DIR OC1 FWD
ECA:
NEUTRAL DIR OC1 REV
LIMIT ANGLE:
NEUTRAL DIR OC1
OFFSET:
NEUTRAL DIR OC1 FWD
PICKUP:
NEUTRAL DIR OC1 REV
PICKUP:
NEUTRAL DIR OC1 OP
CURR:
NEUTRAL DIR OC1 OP
CURR:
NEUTRAL DIR OC1 FWD
NEUTRAL DIR OC1 REV
Measured VX
Voltage
Calculated V_0
}
}
Current
Ground Crt (IG)
Zero Seq Crt (I_0)
Dual, Dual-V, Dual-I
NOTE:
1) CURRENT POLARIZING IS POSSIBLE ONLY IN RELAYS WITH
THE GROUND CURRENT INPUTS CONNECTED TO
AN ADEQUATE CURRENT POLARIZING SOURCE
2) GROUND CURRENT CAN NOT BE USED FOR POLARIZATION
AND OPERATION SIMULTANEOUSLY
3) POSITIVE SEQUENCE RESTRAINT IS NOT APPLIED WHEN
I_1 IS BELOW 0.8pu
827077AE.CDR
Off=0
Enabled=1
AND
AND
AND
AND
AND
AND
AND
OR
OR
OR
OR
IG 0.05 pu
3( I_0 - K I_1 ) PICKUP
3( I_0 - K I_1 ) PICKUP
IG PICKUP
IG PICKUP
Voltage Polarization
Current Polarization
-3V_0
3I_0
FWD
FWD
FWD
REV
REV
REV
RUN
RUN
RUN
OR
OR
RUN
1.25 cy
1.5 cy
NEUTRAL DIR OC1 POS-
SEQ RESTRAINT:
NEUTRAL DIR OC1 POS-
SEQ RESTRAINT:
IG 0.05 pu
Summary of Contents for Multilin g60
Page 10: ...x G60 Generator Protection System GE Multilin TABLE OF CONTENTS INDEX ...
Page 32: ...1 22 G60 Generator Protection System GE Multilin 1 5 USING THE RELAY 1 GETTING STARTED 1 ...
Page 160: ...4 30 G60 Generator Protection System GE Multilin 4 3 FACEPLATE INTERFACE 4 HUMAN INTERFACES 4 ...
Page 486: ...5 326 G60 Generator Protection System GE Multilin 5 10 TESTING 5 SETTINGS 5 ...
Page 518: ...6 32 G60 Generator Protection System GE Multilin 6 5 PRODUCT INFORMATION 6 ACTUAL VALUES 6 ...
Page 532: ...7 14 G60 Generator Protection System GE Multilin 7 2 TARGETS 7 COMMANDS AND TARGETS 7 ...
Page 748: ...D 10 G60 Generator Protection System GE Multilin D 1 IEC 60870 5 104 APPENDIX D D ...
Page 760: ...E 12 G60 Generator Protection System GE Multilin E 2 DNP POINT LISTS APPENDIX E E ...