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GE Multilin
L60 Line Phase Comparison System
5-141
5 SETTINGS
5.5 GROUPED ELEMENTS
5
•
GND DIST Z1 QUAD RGT BLD RCA
: This setting defines the angular position of the right blinder of the quadrilateral
characteristic (see the
Quadrilateral distance characteristic
figure).
•
GND DIST Z1 QUAD LFT BLD
: This setting defines the left blinder position of the quadrilateral characteristic along the
resistive axis of the impedance plane (see the
Quadrilateral distance characteristic
figure). The angular position of the
blinder is adjustable with the use of the
GND DIST Z1 QUAD LFT BLD RCA
setting. This setting applies only to the quadri-
lateral characteristic and should be set with consideration to the maximum load current.
•
GND DIST Z1 QUAD LFT BLD RCA
: This setting defines the angular position of the left blinder of the quadrilateral
characteristic (see the
Quadrilateral distance characteristic
figure).
•
GND DIST Z1 SUPV
: The ground distance elements are supervised by the magnitude of the neutral (3I_0) current.
The current supervision pickup should be set above the maximum unbalance current under maximum load conditions
preventing maloperation due to VT fuse failure.
•
GND DIST Z1 VOLT LEVEL:
This setting is relevant for applications on series-compensated lines, or in general, if
series capacitors are located between the relaying point and a point for which the zone shall not overreach. For plain
(non-compensated) lines, this setting shall be set to zero. Otherwise, the setting is entered in per unit of the VT bank
configured under the
DISTANCE SOURCE
. Effectively, this setting facilitates dynamic current-based reach reduction. In
non-directional applications (
GND DIST Z1 DIR
set to “Non-directional”), this setting applies only to the forward reach of
the non-directional zone. See chapters 8 and 9 for additional details and information on calculating this setting value
for applications on series compensated lines.
•
GND DIST Z1 DELAY:
This setting enables the user to delay operation of the distance elements and implement a
stepped distance backup protection. The distance element timer applies a short drop out delay to cope with faults
located close to the boundary of the zone when small oscillations in the voltages or currents could inadvertently reset
the timer.
•
GND DIST Z1 BLK:
This setting enables the user to select a FlexLogic™ operand to block the given distance element.
VT fuse fail detection is one of the applications for this setting.
Figure 5–68: GROUND DISTANCE Z1 OP SCHEME
837018A7.CDR
AND
AND
AND
OR
OR
OR
OR
** D60, L60, and L90 only. Other UR-series models apply regular current seal-in for zone 1.
AND
FLEXLOGIC OPERAND
GND DIST Z1 PKP A
GND DIST Z1 SUPN IN
OPEN POLE OP **
FLEXLOGIC OPERANDS
SETTING
GND DIST Z1 DELAY
T
PKP
0
T
PKP
0
T
PKP
0
FLEXLOGIC OPERAND
GND DIST Z1 PKP B
FLEXLOGIC OPERAND
GND DIST Z1 PKP C
GND DIST Z1 OP A
GND DIST Z1 OP B
FLEXLOGIC OPERANDS
GND DIST Z1 OP C
FLEXLOGIC OPERAND
GND DIST Z1 OP
Summary of Contents for UR series
Page 2: ......
Page 4: ......
Page 12: ...xii L60 Line Phase Comparison System GE Multilin TABLE OF CONTENTS ...
Page 32: ...1 20 L60 Line Phase Comparison System GE Multilin 1 5 USING THE RELAY 1 GETTING STARTED 1 ...
Page 54: ...2 22 L60 Line Phase Comparison System GE Multilin 2 2 SPECIFICATIONS 2 PRODUCT DESCRIPTION 2 ...
Page 438: ...7 8 L60 Line Phase Comparison System GE Multilin 7 2 TARGETS 7 COMMANDS AND TARGETS 7 ...
Page 478: ...8 40 L60 Line Phase Comparison System GE Multilin 8 3 FAULT LOCATOR 8 THEORY OF OPERATION 8 ...
Page 502: ...A 10 L60 Line Phase Comparison System GE Multilin A 1 PARAMETER LIST APPENDIXA A ...
Page 584: ...B 82 L60 Line Phase Comparison System GE Multilin B 4 MEMORY MAPPING APPENDIXB B ...
Page 622: ...D 10 L60 Line Phase Comparison System GE Multilin D 1 PROTOCOL APPENDIXD D ...
Page 634: ...E 12 L60 Line Phase Comparison System GE Multilin E 2 DNP POINT LISTS APPENDIXE E ...
Page 642: ...F 8 L60 Line Phase Comparison System GE Multilin F 3 WARRANTY APPENDIXF F ...