CHAPTER 5: SETTINGS
GROUPED ELEMENTS
L60 LINE PHASE COMPARISON SYSTEM – INSTRUCTION MANUAL
5-211
5
The line pickup feature uses a combination of undercurrent and undervoltage to identify a line that has been de-energized
(line end open). Alternately assign a FlexLogic operand to the
TERMINAL OPEN
setting that specifies the terminal status.
Three instantaneous overcurrent elements are used to identify a previously de-energized line that has been closed onto a
fault. Faults other than close-in faults can be identified satisfactorily with the distance elements.
Co-ordination features are included to ensure satisfactory operation when high-speed automatic reclosure (AR) is
employed. The
AR CO-ORD DELAY
setting allows the overcurrent setting to be below the expected load current seen after
reclose. Co-ordination is achieved by all of the
LINE PICKP UV
elements resetting and blocking the trip path before the
AR
CO-ORD DELAY
times out. The
AR CO-ORD BYPASS
setting is normally enabled. It is disabled if high speed autoreclosure is
implemented.
The line pickup protection incorporates zone 1 extension capability. When the line is being re-energized from the local
terminal, pickup of an overreaching zone 2 or excessive phase current within eight power cycles after the autorecloser
issues a close command results in the
LINE PICKUP RCL TRIP
FlexLogic operand. For security, the overcurrent trip is
supervised by an undervoltage condition, which in turn is controlled by the
VT FUSE FAIL OP
operand with a 10 ms
coordination timer. If a trip from distance is not required, then it can be disabled with the
LINE PICKUP DISTANCE TRIP
setting.
Configure the
LINE PICKUP RCL TRIP
operand to perform a trip action if the intent is zone 1 extension.
The zone 1 extension philosophy used here normally operates from an under-reaching zone, and it uses an overreaching
distance zone when reclosing the line with the other line end open. The
AR ACCELERATE
setting is provided to achieve zone
1 extension functionality if external autoreclosure is employed. Another zone 1 extension approach is to apply
permanently an overreaching zone, and reduce the reach when reclosing. This philosophy can be programmed via the
autoreclose scheme.
LINE PICKUP FUNCTION
— This setting enables and disables the line pickup feature.
LINE PICKUP SIGNAL SOURCE
— Selects the signal source for line pickup protection.
PHASE IOC LINE PICKUP
— Specifies the level of line current required to declare a line pickup operation when the line is re-
energized.
LINE END OPEN PICKUP DELAY
— Specifies the time during which the line is de-energized before the line pickup logic is
armed.
LINE END OPEN RESET DELAY
— Specifies the time during which the line pickup logic remains armed once the line has been
re-energized.
AR CO-ORD BYPASS
— The coordination timer allows the overcurrent detector to be set below the expected load current
seen after reclose. When this setting is enabled (the default value), the coordination timer is bypassed. Disable this setting
(removing the bypass and inserting the timer) if high speed autoreclosure is employed.
AR CO-ORD BYPASS:
Enabled
Range: Disabled, Enabled
AR CO-ORD PICKUP
DELAY: 0.045 s
Range: 0.000 to 65.535 s in steps of 0.001
AR CO-ORD RESET
DELAY: 0.005 s
Range: 0.000 to 65.535 s in steps of 0.001
TERMINAL OPEN:
Off
Range: FlexLogic operand
AR ACCELERATE:
Off
Range: FlexLogic operand
LINE PICKUP DISTANCE
TRIP: Enabled
Range: Disabled, Enabled
LINE PICKUP BLOCK:
Off
Range: FlexLogic operand
LINE PICKUP
TARGET: Self-reset
Range: Self-reset, Latched, Disabled
LINE PICKUP
EVENTS: Disabled
Range: Disabled, Enabled
Содержание L60
Страница 10: ...x L60 LINE PHASE COMPARISON SYSTEM INSTRUCTION MANUAL TABLE OF CONTENTS ...
Страница 14: ...1 4 L60 LINE PHASE COMPARISON SYSTEM INSTRUCTION MANUAL FOR FURTHER ASSISTANCE CHAPTER 1 INTRODUCTION 1 ...
Страница 122: ...3 72 L60 LINE PHASE COMPARISON SYSTEM INSTRUCTION MANUAL CONNECT TO D400 GATEWAY CHAPTER 3 INSTALLATION 3 ...
Страница 590: ...5 382 L60 LINE PHASE COMPARISON SYSTEM INSTRUCTION MANUAL TESTING CHAPTER 5 SETTINGS 5 ...
Страница 632: ...7 12 L60 LINE PHASE COMPARISON SYSTEM INSTRUCTION MANUAL TARGETS MENU CHAPTER 7 COMMANDS AND TARGETS 7 ...
Страница 736: ...A 14 L60 LINE PHASE COMPARISON SYSTEM INSTRUCTION MANUAL FLEXANALOG ITEMS APPENDIX A FLEXANALOG OPERANDS A ...
Страница 744: ...C 6 L60 LINE PHASE COMPARISON SYSTEM INSTRUCTION MANUAL COMMAND LINE INTERFACE APPENDIX C COMMAND LINE INTERFACE C ...
Страница 752: ...iv L60 LINE PHASE COMPARISON SYSTEM INSTRUCTION MANUAL ABBREVIATIONS ...