5-212
G60 Generator Protection System
GE Multilin
5.6 GROUPED ELEMENTS
5 SETTINGS
5
•
SPLIT PHASE A(C) OFFSET
: This setting specifies the steady-state split phase current at no-load for the each phase.
This should be set equal to the split phase current during normal (unfaulted) operation. The user should assign the split
phase current and the load current (positive sequence) to the data logger to identify the optimum value for this setting.
•
SPLIT PHASE A(C) SLOPE
: This setting specifies the slope of split phase characteristic for each phase. This setting
is used to bias the pickup of the element due to variations in generator loading. The slope is defined as the ratio of the
per-unit split phase current over the per-unit load current. The user should assign the split phase current and the load
current (positive sequence) to the data logger to identify the optimum value for this setting.
•
SPLIT PHASE MIN LOAD
: This setting specifies the minimum load (positive-sequence current) supervision level.
•
SPLIT PHASE MODE
: This setting specifies the mode of operation. If the “Over” mode is chosen, the element will
pickup when the split phase current is rises above the biased offset current plus the pickup setting. If “Over-under”
mode is chosen, the element will also pickup if the split phase current is falls below the biased offset current minus the
pickup setting. See the earlier description for further details.
•
SPLIT PHASE DELAY
: This setting specifies a time delay required to operate after the pickup condition is established.
During an external disturbance the CTs may saturate. CT saturation can cause a spurious split phase current, espe-
cially in the case where the split phase current is derived from the external summation of two split phase CTs (first fig-
ure above). In this instance, a time delay can be used to ride through the saturation event. Alternately, the CT
saturation flag can also be used to supervise the function.
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 ...