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5-174
L60 LINE PHASE COMPARISON SYSTEM – INSTRUCTION MANUAL
GROUPED ELEMENTS
CHAPTER 5: SETTINGS
5
3.1.
For a two-terminal line
3.2.
For a three-terminal line
5.6.3.10 Open breaker echo
SETTINGS
GROUPED ELEMENTS
SETTING GROUP 1(6)
PHASE COMPARISON ELEMENTS
ADVANCED FAULT
DETECTORS
OPEN BREAKER ECHO
As operation of the permissive tripping mode of phase comparison protection and tripping of the line is fundamentally
dependent on transmitting the signal to the remote end of the line, some cases of system operating conditions require
attention:
•
If a line is open at one end, the phase comparison element is unable to detect an internal fault and give trip
permission to the remote terminal relay.
•
A weak-infeed or no fault infeed at one end of the faulted line can prevent phase comparison element trip.
Consequently, instant conversion from weak-infeed logic with sending permissive continuous signal to fault logic with
sending square waves is required in case of the external fault at the adjacent or internal fault for proper operation of
phase comparison relay at the remote line's terminal.
Apply the open breaker echo element to any particular application according to local system conditions. The element
settings are as follows.
OPEN BREAKER KEYING
— Disables/enables the open breaker keying feature.
BRK 1 AUX CONTACT
— Assigns a FlexLogic operand to control open/close state of breaker 1 with either 52a or 52b type
contact to create logic “1” when the breaker is open.
NOTE
Perform charging current compensation calculations for an arrangement where the VTs are connected to the
line side of the circuit. Otherwise, opening the breaker at one end of the line causes a calculation error. The
calculated charging current per line terminal is recorded in oscillography per each phase.
OPEN BREAKER
ECHO
OPEN BREAKER KEYING
Disabled
Range: Disabled, Enabled
BRK 1 AUX CONTACT:
Off
Range: FlexLogic operand
BRK 1 CONT SUPV:
Off
Range: FlexLogic operand
BRK 2 AUX CONTACT:
Off
Range: FlexLogic operand
BRK 2 CONT SUPV:
Off
Range: FlexLogic operand
OPEN BREAKER KEYING
PKP DELAY: 0.000 s
Range: 0.000 to 50.000 s in steps of 0.001
OPEN BREAKER KEYING
RST DELAY: 0.000 s
Range: 0.000 to 50.000 s in steps of 0.001
WEAK-INFEED KEYING:
Off
Range: FlexLogic operand
WEAK-INFEED SUPV:
Off
Range: FlexLogic operand
WEAK-INFEED PICKUP
DELAY: 0.000 s
Range: 0.000 to 50.000 s in steps of 0.001
WEAK-INFEED RESET
DELAY: 0.035 s
Range: 0.000 to 50.000 s in steps of 0.001
X
react_n
1
1
X
react_n_terminal1
-----------------------------------
1
X
react_n_terminal2
-----------------------------------
+
⁄
=
X
react_n
1
1
X
react_n_terminal1
-----------------------------------
1
X
react__n_terminal2
-------------------------------------
1
X
react_n_terminal3
-----------------------------------
+
+
⁄
=
Содержание L60
Страница 130: ...4 30 L60 LINE PHASE COMPARISON SYSTEM INSTRUCTION MANUAL LOGIC DIAGRAMS CHAPTER 4 INTERFACES 4 ...
Страница 464: ...5 334 L60 LINE PHASE COMPARISON SYSTEM INSTRUCTION MANUAL TESTING CHAPTER 5 SETTINGS 5 ...
Страница 498: ...7 10 L60 LINE PHASE COMPARISON SYSTEM INSTRUCTION MANUAL TARGETS MENU CHAPTER 7 COMMANDS AND TARGETS 7 ...
Страница 570: ...10 14 L60 LINE PHASE COMPARISON SYSTEM INSTRUCTION MANUAL DISPOSAL CHAPTER 10 MAINTENANCE 10 ...
Страница 582: ...A 12 L60 LINE PHASE COMPARISON SYSTEM INSTRUCTION MANUAL FLEXANALOG ITEMS APPENDIX A FLEXANALOG OPERANDS A ...
Страница 588: ...C 4 L60 LINE PHASE COMPARISON SYSTEM INSTRUCTION MANUAL REVISION HISTORY APPENDIX C MISCELLANEOUS C ...
Страница 592: ...iv L60 LINE PHASE COMPARISON SYSTEM INSTRUCTION MANUAL ABBREVIATIONS ...