5-176
G60 Generator Protection System
GE Multilin
5.6 GROUPED ELEMENTS
5 SETTINGS
5
5.6.5 STATOR DIFFERENTIAL
PATH: SETTINGS
GROUPED ELEMENTS
SETTING GROUP 1(6)
STATOR DIFFERENTIAL
The stator differential protection element is intended for use on the stator windings of rotating machinery.
Figure 5–80: STATOR DIFFERENTIAL CHARACTERISTIC
This element has a dual slope characteristic. The main purpose of the percent-slope characteristic is to prevent a maloper-
ation caused by unbalances between CTs during external faults. CT unbalances arise as a result of the following factors:
1.
CT accuracy errors
STATOR
DIFFERENTIAL
STATOR DIFF
FUNCTION: Disabled
Range: Disabled, Enabled
MESSAGE
STATOR DIFF LINE
END SOURCE: SRC 1
Range: SRC 1, SRC 2, SRC 3, SRC 4
MESSAGE
STATOR DIFF NEUTRAL
END SOURCE: SRC 1
Range: SRC 1, SRC 2, SRC 3, SRC 4
MESSAGE
STATOR DIFF
PICKUP:
0.100 pu
Range: 0.050 to 1.000 pu in steps of 0.001
MESSAGE
STATOR DIFF
SLOPE 1: 10 %
Range: 1 to 100% in steps of 1
MESSAGE
STATOR DIFF
BREAK 1: 1.15 pu
Range: 1.00 to 1.50 pu in steps of 0.01
MESSAGE
STATOR DIFF
SLOPE 2: 80 %
Range: 1 to 100% in steps of 1
MESSAGE
STATOR DIFF
BREAK 2: 8.00 pu
Range: 1.50 to 30.00 pu in steps of 0.01
MESSAGE
STATOR DIFF
BLK: Off
Range: FlexLogic operand
MESSAGE
STATOR DIFF
TARGET: Self-reset
Range: Self-reset, Latched, Disabled
MESSAGE
STATOR DIFF
EVENTS: Disabled
Range: Disabled, Enabled
differ
ential
restraining
Br
eak
1
Br
eak
2
Pickup
Slope 1
Slope 2
Block
Operate
830735A1.CDR
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 ...