CHAPTER 5: SETTINGS
CONTROL ELEMENTS
L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
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5
Figure 5-161: Thermal overload protection logic
5.8.11.7 Broken conductor detection
SETTINGS
CONTROL ELEMENTS
MONITORING ELEMENTS
BROKEN CONDUCTOR 1(2)
The broken conductor function detects a transmission line broken conductor condition or a single-pole breaker
malfunction condition by checking the phase current input signals and the I_2 / I_1 ratio. The intent is to detect a single-
phase broken conductor only. As such, two-phase or three-phase broken conductors cannot be detected.
To distinguish between single-phase disappearance and system disturbance in all three phases (such as load change and
switching), the broken conductor element monitors the change in all three phase currents at the present instance and at
four cycles previous. It also monitors changes in the I_2 / I_1 ratio, I_1 minimum, and I_1 maximum.
BROKEN CONDUCTOR 1
BROKEN CONDUCTOR 1
FUNCTION: Disabled
Range: Disabled, Enabled
BROKEN CONDUCTOR 1
SOURCE: SRC 1
Range: SRC 1, SRC 2
BROKEN CONDUCTOR 1
I2/I1 RATIO: 20%
Range: 20.0% to 100.0% in steps of 0.1%
BROKEN CONDUCTOR 1
I1 MIN: 0.10 pu
Range: 0.05 to 1.00 pu in steps of 0.01
BROKEN CONDUCTOR 1
I1 MAX: 1.50 pu
Range: 0.05 to 5.00 pu in steps of 0.01
BROKEN CONDUCTOR 1
PKP DELAY: 20.000 s
Range: 0.000 to 65.535 s in steps of 0.001
BROKEN CONDCT 1 BLK:
Off
Range: FlexLogic operand
BROKEN CONDUCTOR 1
TARGET: Self-reset
Range: Self-reset, Latched, Disabled
BROKEN CONDUCTOR 1
EVENTS: Disabled
Range: Disabled, Enabled
Содержание L30
Страница 10: ...x L30 LINE CURRENT DIFFERENTIAL SYSTEM INSTRUCTION MANUAL TABLE OF CONTENTS ...
Страница 14: ...1 4 L30 LINE CURRENT DIFFERENTIAL SYSTEM INSTRUCTION MANUAL FOR FURTHER ASSISTANCE CHAPTER 1 INTRODUCTION 1 ...
Страница 126: ...3 68 L30 LINE CURRENT DIFFERENTIAL SYSTEM INSTRUCTION MANUAL CONNECT TO D400 GATEWAY CHAPTER 3 INSTALLATION 3 ...
Страница 214: ...4 88 L30 LINE CURRENT DIFFERENTIAL SYSTEM INSTRUCTION MANUAL FLEXLOGIC DESIGN USING ENGINEER CHAPTER 4 INTERFACES 4 ...
Страница 582: ...7 16 L30 LINE CURRENT DIFFERENTIAL SYSTEM INSTRUCTION MANUAL TARGETS MENU CHAPTER 7 COMMANDS AND TARGETS 7 ...
Страница 598: ...9 6 L30 LINE CURRENT DIFFERENTIAL SYSTEM INSTRUCTION MANUAL TESTING CHAPTER 9 COMMISSIONING 9 ...
Страница 622: ...10 24 L30 LINE CURRENT DIFFERENTIAL SYSTEM INSTRUCTION MANUAL FAULT LOCATOR CHAPTER 10 THEORY OF OPERATION 10 ...
Страница 670: ...A 18 L30 LINE CURRENT DIFFERENTIAL SYSTEM INSTRUCTION MANUAL FLEXANALOG ITEMS APPENDIX A FLEXANALOG OPERANDS A ...
Страница 678: ...C 6 L30 LINE CURRENT DIFFERENTIAL SYSTEM INSTRUCTION MANUAL COMMAND LINE INTERFACE APPENDIX C COMMAND LINE INTERFACE C ...
Страница 682: ...D 4 L30 LINE CURRENT DIFFERENTIAL SYSTEM INSTRUCTION MANUAL REVISION HISTORY APPENDIX D MISCELLANEOUS D ...
Страница 686: ...iv L30 LINE CURRENT DIFFERENTIAL SYSTEM INSTRUCTION MANUAL ABBREVIATIONS ...