CHAPTER 5: SETTINGS
GROUPED ELEMENTS
L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
5-239
5
The positive-sequence restraint allows for more sensitive settings by counterbalancing spurious negative-sequence
currents resulting from
•
System unbalances under heavy load conditions
•
Transformation errors of current transformers (CTs) during three-phase faults
•
Fault inception and switch-off transients during three-phase faults
The positive-sequence restraint must be considered when testing for pickup accuracy and response time (multiple of
pickup). The operating quantity depends on how the test currents are injected into the relay (single-phase injection:
I
op
= 0.2917 x I
injected
; three-phase injection, opposite rotation: I
op
= I
injected
).
Figure 5-121: Negative sequence IOC1 logic
5.7.8 Breaker failure (ANSI 50BF)
SETTINGS
GROUPED ELEMENTS
SETTING GROUP 1(6)
BREAKER FAILURE
BREAKER FAILURE 1(2)
BREAKER FAILURE 1
BF1 FUNCTION:
Disabled
Range: Disabled, Enabled
BF1 MODE:
3-Pole
Range: 3-Pole, 1-Pole
BF1 SOURCE:
SRC 1
Range: SRC 1, SRC 2
BF1 USE AMP SUPV:
Yes
Range: Yes, No
BF1 USE SEAL-IN:
Yes
Range: Yes, No
BF1 3-POLE INITIATE:
Off
Range: FlexLogic operand
BF1 BLOCK:
Off
Range: FlexLogic operand
BF1 RETRIP PICKUP
DELAY: 0.033 s
Range: 0.000 to 65.535 s in steps of 0.001
BF1 PH AMP SUPV
PICKUP: 1.050 pu
Range: 0.020 to 30.000 pu in steps of 0.001
BF1 N AMP SUPV
PICKUP: 1.050 pu
Range: 0.020 to 30.000 pu in steps of 0.001
BF1 USE TIMER 1:
Yes
Range: Yes, No
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 ...