2-2
L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
PRODUCT DESCRIPTION
CHAPTER 2: PRODUCT DESCRIPTION
2
Secure Routable GOOSE (R-GOOSE) is supported with software options.
In addition to current differential protection, the relay provides multiple backup protection for phase and ground faults. For
overcurrent protection, the time overcurrent curves can be selected from a selection of standard curve shapes or a
custom FlexCurve™ for optimum co-ordination.
The L30 incorporates charging current compensation for applications on very long transmission lines without loss of
sensitivity. The line capacitive current is removed from the terminal phasors.
For breaker-and-a-half or ring applications, the L30 design provides secure operation during external faults with possible
CT saturation.
Voltage, current, and power metering is built into the relay as a standard feature. Current parameters are available as total
waveform RMS magnitude, or as fundamental frequency only RMS magnitude and angle (phasor).
The L30 uses flash memory technology that allows field upgrading as new features are added. Firmware and software are
upgradable.
The following single-line diagram illustrates the relay functionality using American National Standards Institute (ANSI)
device numbers.
Table 2-1: ANSI device numbers and functions supported
Device number Function
Device number Function
25
Synchrocheck
51_2
Negative-sequence time overcurrent
27P
Phase undervoltage
52
AC circuit breaker
27X
Auxiliary undervoltage
59N
Neutral overvoltage
49
Thermal overload protection
59P
Phase overvoltage
50BF
Breaker failure
59_2
Negative-sequence overvoltage
50DD
Current disturbance detector
59X
Auxiliary overvoltage
50G
Ground instantaneous overcurrent
67N
Neutral directional overcurrent
50N
Neutral instantaneous overcurrent
67P
Phase directional overcurrent
50P
Phase instantaneous overcurrent
79
Automatic recloser
50_2
Negative-sequence instantaneous overcurrent
81R
Rate of change frequency
51G
Ground time overcurrent
81U
Underfrequency
51N
Neutral time overcurrent
87L
Segregated line current differential
51P
Phase time overcurrent
87LG
Line ground current differential
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 ...