8-4
F60 Feeder Protection System
GE Multilin
8.1 HIGH-IMPEDANCE (HI-Z) FAULT DETECTION
8 THEORY OF OPERATION
8
8.1.13 HI-Z VOLTAGE SUPERVISION ALGORITHM
This algorithm was implemented to minimize the probability of a false Hi-Z indication due to bus voltage dips (e.g. from par-
allel feeder faults). A fault on a parallel line can cause voltage dips that will produce a decrease in the line load which can
be mistaken by Hi-Z element as Loss of Load.
Every two cycle the voltage on each phase is checked against the
HI-Z V SUPV THRESHOLD
. If the voltage on any phase has
dropped by a percentage greater then or equal to this setting, the Loss of Load flag will be blocked. The blocking is not
done on a per- phase basis. If one phase voltage shows a dip, the block is applied for all phases. Also the High Impedance
Oscillography will record that a voltage dip was experienced. The Oscillography record is phase specific.
Summary of Contents for F60 UR Series
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Page 30: ...1 20 F60 Feeder Protection System GE Multilin 1 5 USING THE RELAY 1 GETTING STARTED 1 ...
Page 48: ...2 18 F60 Feeder Protection System GE Multilin 2 2 SPECIFICATIONS 2 PRODUCT DESCRIPTION 2 ...
Page 126: ...4 30 F60 Feeder Protection System GE Multilin 4 2 FACEPLATE INTERFACE 4 HUMAN INTERFACES 4 ...
Page 354: ...5 228 F60 Feeder Protection System GE Multilin 5 9 TESTING 5 SETTINGS 5 ...
Page 382: ...6 28 F60 Feeder Protection System GE Multilin 6 5 PRODUCT INFORMATION 6 ACTUAL VALUES 6 ...
Page 398: ...8 8 F60 Feeder Protection System GE Multilin 8 2 FAULT LOCATOR 8 THEORY OF OPERATION 8 ...
Page 414: ...A 14 F60 Feeder Protection System GE Multilin A 1 PARAMETER LIST APPENDIXA A ...
Page 492: ...B 78 F60 Feeder Protection System GE Multilin B 4 MEMORY MAPPING APPENDIXB B ...
Page 530: ...D 10 F60 Feeder Protection System GE Multilin D 1 IEC 60870 5 104 APPENDIXD D ...
Page 542: ...E 12 F60 Feeder Protection System GE Multilin E 2 DNP POINT LISTS APPENDIXE E ...
Page 558: ...x F60 Feeder Protection System GE Multilin INDEX ...