GE L30 User manual

GE
Grid Solutions
Instruction Manual
Product version: 7.4x
GE publication code: 1601-9050-AE3 (GEK-130983B)
L30
Line Current Differential System
1601-9050-AE3
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Copyright © 2017 GE Multilin Inc. All rights reserved.
L30 Line Current Differential System Instruction Manual for version 7.4x.
L30, FlexLogic, FlexElement, FlexCurve, FlexAnalog, FlexInteger, FlexState, EnerVista,
CyberSentry, HardFiber, Multilin, and GE Multilin are trademarks or registered trademarks
of GE Multilin Inc.
The contents of this manual are the property of GE Multilin Inc. This documentation is
furnished on license and may not be reproduced in whole or in part without the permission
of GE Multilin. The content of this manual is for informational use only and is subject to
change without notice.
Part number: 1601-9050-AE3 (April 2017)

L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL iii
L30 Line Current Differential System
Table of contents
1 INTRODUCTION 1.1 Safety symbols and definitions..................................................................... 1-1
1.1.1 General cautions and warnings .................................................................................... 1-1
1.2 For further assistance .................................................................................... 1-2
2PRODUCT
DESCRIPTION
2.1 Product description......................................................................................... 2-1
2.1.1 Overview................................................................................................................................... 2-1
2.1.2 Features.................................................................................................................................... 2-3
2.2 Pilot channel relaying ..................................................................................... 2-5
2.2.1 Inter-relay communications............................................................................................ 2-5
2.2.2 Channel monitor................................................................................................................... 2-7
2.2.3 Loopback test......................................................................................................................... 2-7
2.2.4 Direct transfer tripping ...................................................................................................... 2-8
2.3 Security.............................................................................................................. 2-8
2.4 Order codes ....................................................................................................2-11
2.4.1 Order codes with enhanced CT/VT modules.........................................................2-12
2.4.2 Order codes with process bus modules ..................................................................2-17
2.4.3 Replacement modules.....................................................................................................2-22
2.5 Signal processing...........................................................................................2-24
2.5.1 UR signal processing ........................................................................................................2-24
2.6 Specifications .................................................................................................2-26
2.6.1 Protection elements..........................................................................................................2-27
2.6.2 User-programmable elements ....................................................................................2-31
2.6.3 Monitoring..............................................................................................................................2-33
2.6.4 Metering..................................................................................................................................2-34
2.6.5 Inputs .......................................................................................................................................2-35
2.6.6 Power supply........................................................................................................................2-36
2.6.7 Outputs....................................................................................................................................2-36
2.6.8 Communication protocols..............................................................................................2-39
2.6.9 Inter-relay communications..........................................................................................2-40
2.6.10 CyberSentry security.........................................................................................................2-41
2.6.11 Environmental......................................................................................................................2-41
2.6.12 Type tests...............................................................................................................................2-42
2.6.13 Production tests..................................................................................................................2-42
2.6.14 Approvals ...............................................................................................................................2-43
2.6.15 Maintenance.........................................................................................................................2-43

iv L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
TABLE OF CONTENTS
3 INSTALLATION 3.1 Unpack and inspect.........................................................................................3-1
3.2 Panel cutouts....................................................................................................3-2
3.2.1 Horizontal units......................................................................................................................3-2
3.2.2 Vertical units............................................................................................................................3-3
3.2.3 Rear terminal layout............................................................................................................3-8
3.3 Wiring ..............................................................................................................3-10
3.3.1 Typical wiring.......................................................................................................................3-10
3.3.2 Dielectric strength .............................................................................................................3-11
3.3.3 Control power......................................................................................................................3-11
3.3.4 CT/VT modules ....................................................................................................................3-12
3.3.5 Process bus modules ....................................................................................................... 3-14
3.3.6 Contact inputs and outputs ..........................................................................................3-14
3.3.7 Transducer inputs and outputs...................................................................................3-25
3.3.8 RS232 faceplate port........................................................................................................3-26
3.3.9 CPU communication ports ............................................................................................3-27
3.3.10 IRIG-B.......................................................................................................................................3-29
3.4 Pilot channel communications....................................................................3-30
3.4.1 Fiber: LED and ELED transmitters...............................................................................3-31
3.4.2 Fiber laser transmitters...................................................................................................3-31
3.4.3 G.703 interface....................................................................................................................3-32
3.4.4 RS422 interface...................................................................................................................3-36
3.4.5 Two-channel two-clock RS422 interface................................................................3-38
3.4.6 RS422 and fiber interface ..............................................................................................3-39
3.4.7 G.703 and fiber interface................................................................................................3-39
3.4.8 IEEE C37.94 interface .......................................................................................................3-40
3.4.9 C37.94SM interface...........................................................................................................3-43
3.5 Activate relay .................................................................................................3-46
3.6 Install software ..............................................................................................3-47
3.6.1 EnerVista communication overview ......................................................................... 3-47
3.6.2 System requirements.......................................................................................................3-48
3.6.3 Install software....................................................................................................................3-48
3.7 Add device to software.................................................................................3-49
3.7.1 Set IP address in UR..........................................................................................................3-50
3.7.2 Configure serial connection..........................................................................................3-55
3.7.3 Configure Ethernet connection...................................................................................3-56
3.7.4 Configure modem connection.....................................................................................3-58
3.7.5 Automatic discovery of UR devices...........................................................................3-58
3.8 Connect to the L30 ........................................................................................3-59
3.8.1 Connect to the L30 in EnerVista..................................................................................3-59
3.8.2 Use Quick Connect via the front panel RS232 port............................................3-60
3.8.3 Use Quick Connect via a rear Ethernet port..........................................................3-61
3.9 Set up CyberSentry and change default password.................................3-61
3.10 Import settings...............................................................................................3-62
4 INTERFACES 4.1 EnerVista software interface.........................................................................4-1
4.1.1 Introduction .............................................................................................................................4-1
4.1.2 Settings files ............................................................................................................................4-1
4.1.3 Event viewing..........................................................................................................................4-2
4.1.4 File support ..............................................................................................................................4-3
4.1.5 EnerVista main window .....................................................................................................4-3
4.1.6 Protection summary window..........................................................................................4-4
4.1.7 Settings templates................................................................................................................4-5
4.1.8 Secure and lock FlexLogic equations..........................................................................4-9
4.1.9 Settings file traceability...................................................................................................4-12

TABLE OF CONTENTS
L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL v
4.2 Front panel interface ....................................................................................4-15
4.2.1 Front panel display............................................................................................................4-15
4.2.2 Front panel keypad............................................................................................................4-16
4.2.3 Menu navigation.................................................................................................................4-16
4.2.4 Menu hierarchy ...................................................................................................................4-16
4.2.5 Changing settings ..............................................................................................................4-17
4.2.6 Faceplate................................................................................................................................4-19
4.2.7 LED indicators ......................................................................................................................4-20
4.2.8 Custom LED labeling.........................................................................................................4-23
4.2.9 Breaker control....................................................................................................................4-28
4.2.10 Change passwords............................................................................................................4-29
4.2.11 Invalid password entry ....................................................................................................4-30
4.3 Logic diagrams...............................................................................................4-31
4.4 FlexLogic design and monitoring using Engineer....................................4-32
4.4.1 Design logic...........................................................................................................................4-34
4.4.2 Send file to and from device .........................................................................................4-44
4.4.3 Monitor logic.........................................................................................................................4-45
4.4.4 View front panel and print labels................................................................................4-46
4.4.5 Generate connectivity report........................................................................................4-47
4.4.6 Preferences ...........................................................................................................................4-47
4.4.7 Toolbars ..................................................................................................................................4-51
5 SETTINGS 5.1 Settings menu .................................................................................................. 5-1
5.2 Overview ........................................................................................................... 5-4
5.2.1 Introduction to elements .................................................................................................. 5-4
5.2.2 Introduction to AC sources .............................................................................................. 5-5
5.3 Product setup................................................................................................... 5-8
5.3.1 Security ..................................................................................................................................... 5-8
5.3.2 Display properties ..............................................................................................................5-26
5.3.3 Clear relay records.............................................................................................................5-28
5.3.4 Communications ................................................................................................................5-29
5.3.5 Modbus user map ..............................................................................................................5-93
5.3.6 Real-time clock....................................................................................................................5-94
5.3.7 Fault reports .........................................................................................................................5-98
5.3.8 Oscillography.....................................................................................................................5-100
5.3.9 Data logger ........................................................................................................................5-102
5.3.10 User-programmable LEDs ..........................................................................................5-104
5.3.11 User-programmable self-tests .................................................................................5-107
5.3.12 Control pushbuttons......................................................................................................5-107
5.3.13 User-programmable pushbuttons..........................................................................5-109
5.3.14 Flex state parameters...................................................................................................5-114
5.3.15 User-definable displays................................................................................................5-115
5.3.16 Installation..........................................................................................................................5-116
5.4 Remote resources........................................................................................5-117
5.4.1 Remote resources configuration .............................................................................5-117
5.5 System setup................................................................................................5-118
5.5.1 AC inputs .............................................................................................................................5-118
5.5.2 Power system....................................................................................................................5-119
5.5.3 Signal sources...................................................................................................................5-120
5.5.4 87L power system...........................................................................................................5-123
5.5.5 Breakers...............................................................................................................................5-130
5.5.6 Disconnect switches......................................................................................................5-135
5.5.7 FlexCurves...........................................................................................................................5-138
5.5.8 Phasor Measurement Unit ..........................................................................................5-145

vi L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
TABLE OF CONTENTS
5.6 FlexLogic........................................................................................................5-165
5.6.1 FlexLogic operands........................................................................................................ 5-165
5.6.2 FlexLogic rules.................................................................................................................. 5-177
5.6.3 FlexLogic evaluation...................................................................................................... 5-177
5.6.4 FlexLogic example..........................................................................................................5-177
5.6.5 FlexLogic equation editor............................................................................................ 5-182
5.6.6 FlexLogic timers............................................................................................................... 5-182
5.6.7 FlexElements ..................................................................................................................... 5-182
5.6.8 Non-volatile latches.......................................................................................................5-187
5.7 Grouped elements .......................................................................................5-188
5.7.1 Overview ............................................................................................................................. 5-188
5.7.2 Setting group 1................................................................................................................. 5-188
5.7.3 Line differential elements............................................................................................ 5-189
5.7.4 Phase current ................................................................................................................... 5-194
5.7.5 Neutral current................................................................................................................. 5-206
5.7.6 Ground current ................................................................................................................ 5-214
5.7.7 Negative sequence current........................................................................................ 5-217
5.7.8 Breaker failure (ANSI 50BF)......................................................................................... 5-219
5.7.9 Voltage elements ............................................................................................................ 5-228
5.7.10 Supervising elements.................................................................................................... 5-235
5.8 Control elements .........................................................................................5-238
5.8.1 Overview ............................................................................................................................. 5-238
5.8.2 Trip bus ................................................................................................................................ 5-238
5.8.3 Setting groups .................................................................................................................. 5-240
5.8.4 Selector switch................................................................................................................. 5-241
5.8.5 Underfrequency (ANSI 81U)........................................................................................ 5-248
5.8.6 Frequency rate of change (ANSI 81R).................................................................... 5-249
5.8.7 Synchrocheck (ANSI 25) ............................................................................................... 5-251
5.8.8 Autoreclose (ANSI 79).................................................................................................... 5-257
5.8.9 Digital elements............................................................................................................... 5-263
5.8.10 Digital counters................................................................................................................ 5-266
5.8.11 Monitoring elements ..................................................................................................... 5-268
5.9 Inputs/outputs .............................................................................................5-282
5.9.1 Contact inputs.................................................................................................................. 5-282
5.9.2 Virtual inputs..................................................................................................................... 5-284
5.9.3 Contact outputs............................................................................................................... 5-285
5.9.4 Virtual outputs.................................................................................................................. 5-288
5.9.5 Resetting ............................................................................................................................. 5-288
5.9.6 Direct inputs and outputs ........................................................................................... 5-289
5.10 Transducer inputs/outputs........................................................................5-290
5.10.1 DCmA inputs...................................................................................................................... 5-290
5.10.2 RTD inputs .......................................................................................................................... 5-291
5.10.3 DCmA outputs .................................................................................................................. 5-292
5.11 Testing ...........................................................................................................5-296
5.11.1 Test mode function ........................................................................................................5-296
5.11.2 Test mode forcing........................................................................................................... 5-297
5.11.3 Phasor Measurement Unit test values.................................................................. 5-297
5.11.4 Force contact inputs ..................................................................................................... 5-298
5.11.5 Force contact outputs .................................................................................................. 5-299
5.11.6 Channel tests .................................................................................................................... 5-299
6 ACTUAL VALUES 6.1 Actual Values menu.........................................................................................6-1
6.2 Front panel........................................................................................................6-3
6.3 Status................................................................................................................. 6-4

TABLE OF CONTENTS
L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL vii
6.3.1 Contact inputs ....................................................................................................................... 6-4
6.3.2 Virtual inputs........................................................................................................................... 6-4
6.3.3 RxGOOSE boolean inputs.................................................................................................. 6-4
6.3.4 RxGOOSE DPS inputs .......................................................................................................... 6-4
6.3.5 Contact outputs .................................................................................................................... 6-5
6.3.6 Virtual outputs ....................................................................................................................... 6-5
6.3.7 Autoreclose ............................................................................................................................. 6-5
6.3.8 RxGOOSE status.................................................................................................................... 6-5
6.3.9 RxGOOSE statistics .............................................................................................................. 6-6
6.3.10 Channel tests.......................................................................................................................... 6-6
6.3.11 Digital counters ..................................................................................................................... 6-7
6.3.12 Selector switches.................................................................................................................. 6-8
6.3.13 Flex States................................................................................................................................ 6-8
6.3.14 Ethernet .................................................................................................................................... 6-8
6.3.15 Real time clock synchronizing........................................................................................ 6-8
6.3.16 Direct inputs............................................................................................................................ 6-9
6.3.17 Incipient fault detector ...................................................................................................... 6-9
6.3.18 Remaining connection status.......................................................................................6-10
6.3.19 Parallel Redundancy Protocol (PRP)...........................................................................6-10
6.3.20 TxGOOSE status ..................................................................................................................6-11
6.4 Metering ..........................................................................................................6-11
6.4.1 Metering conventions.......................................................................................................6-11
6.4.2 Differential current ............................................................................................................6-15
6.4.3 Sources....................................................................................................................................6-16
6.4.4 Synchrocheck.......................................................................................................................6-20
6.4.5 Tracking frequency............................................................................................................6-21
6.4.6 Frequency rate of change..............................................................................................6-21
6.4.7 FlexElements.........................................................................................................................6-21
6.4.8 RxGOOSE analogs ..............................................................................................................6-22
6.4.9 Phasor Measurement Unit .............................................................................................6-22
6.4.10 PMU aggregator..................................................................................................................6-23
6.4.11 Transducer inputs and outputs ...................................................................................6-23
6.5 Records............................................................................................................6-24
6.5.1 Fault reports .........................................................................................................................6-24
6.5.2 Event records .......................................................................................................................6-25
6.5.3 Oscillography........................................................................................................................6-26
6.5.4 Data logger ...........................................................................................................................6-26
6.5.5 Phasor Measurement Unit records............................................................................6-27
6.5.6 Breaker maintenance.......................................................................................................6-27
6.6 Product information......................................................................................6-28
6.6.1 Model information..............................................................................................................6-28
6.6.2 Firmware revisions ............................................................................................................6-29
7 COMMANDS AND
TARGETS
7.1 Commands menu ............................................................................................ 7-1
7.1.1 Virtual inputs........................................................................................................................... 7-2
7.1.2 Clear records .......................................................................................................................... 7-2
7.1.3 Set date and time................................................................................................................. 7-3
7.1.4 Relay maintenance.............................................................................................................. 7-3
7.1.5 Phasor Measurement Unit one-shot........................................................................... 7-4
7.1.6 Security ..................................................................................................................................... 7-6
7.2 Targets menu ................................................................................................... 7-6
7.2.1 Target messages .................................................................................................................. 7-6
7.2.2 Relay self-tests ...................................................................................................................... 7-7

viii L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
TABLE OF CONTENTS
8 APPLICATION OF
SETTINGS
8.1 CT requirements ..............................................................................................8-1
8.1.1 Introduction .............................................................................................................................8-1
8.1.2 CT saturation analysis tool...............................................................................................8-2
8.2 Current differential (87L) settings ................................................................8-3
8.2.1 Introduction .............................................................................................................................8-3
8.2.2 Current differential pickup................................................................................................8-4
8.2.3 Current differential restraint 1........................................................................................8-4
8.2.4 Current differential restraint 2........................................................................................8-4
8.2.5 Current differential break point......................................................................................8-4
8.2.6 CT tap..........................................................................................................................................8-4
8.3 Channel asymmetry compensation using GPS ..........................................8-6
8.3.1 Introduction .............................................................................................................................8-6
8.3.2 Compensation method 1...................................................................................................8-6
8.3.3 Compensation method 2...................................................................................................8-7
8.3.4 Compensation method 3...................................................................................................8-8
8.4 Instantaneous elements.................................................................................8-9
8.4.1 Instantaneous element error during L30 synchronization................................8-9
9 COMMISSIONING 9.1 Testing ...............................................................................................................9-1
9.1.1 Channel testing......................................................................................................................9-1
9.1.2 Clock synchronization tests .............................................................................................9-2
9.1.3 Current differential...............................................................................................................9-3
9.1.4 Local-remote relay tests....................................................................................................9-4
10 THEORY OF
OPERATION
10.1 Overview .........................................................................................................10-1
10.1.1 L30 design .............................................................................................................................10-1
10.1.2 L30 architecture .................................................................................................................10-2
10.1.3 Removal of decaying offset ..........................................................................................10-2
10.1.4 Phaselet computation ..................................................................................................... 10-2
10.1.5 Disturbance detection .....................................................................................................10-3
10.1.6 Fault detection ....................................................................................................................10-3
10.1.7 Ground differential element..........................................................................................10-5
10.1.8 Clock synchronization......................................................................................................10-6
10.1.9 Frequency tracking and phase locking ...................................................................10-6
10.1.10 Frequency detection.........................................................................................................10-7
10.1.11 Phase detection..................................................................................................................10-8
10.1.12 Phase-locking filter......................................................................................................... 10-10
10.1.13 Matching phaselets........................................................................................................ 10-11
10.1.14 Start-up................................................................................................................................ 10-12
10.1.15 Hardware and communication requirements.................................................. 10-12
10.1.16 Online estimate of measurement errors.............................................................. 10-12
10.1.17 CT saturation detection................................................................................................ 10-13
10.1.18 Charging current compensation ............................................................................. 10-14
10.1.19 Differential element characteristics....................................................................... 10-15
10.1.20 Relay synchronization................................................................................................... 10-16
10.2 Operating condition characteristics........................................................10-17
10.2.1 Description......................................................................................................................... 10-17
10.2.2 Trip decision example................................................................................................... 10-19
10.2.3 Trip decision test ............................................................................................................. 10-19
10.3 Fault locator .................................................................................................10-20
10.3.1 Description......................................................................................................................... 10-20

TABLE OF CONTENTS
L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL ix
11 MAINTENANCE 11.1 Monitoring ......................................................................................................11-1
11.1.1 Devices with Site Targets................................................................................................11-1
11.1.2 Data with Modbus Analyzer ..........................................................................................11-1
11.2 General maintenance ...................................................................................11-3
11.2.1 In-service maintenance ..................................................................................................11-3
11.2.2 Out-of-service maintenance.........................................................................................11-3
11.2.3 Unscheduled maintenance (system interruption)...............................................11-3
11.3 Retrieve files...................................................................................................11-3
11.3.1 CyberSentry security event files ..................................................................................11-4
11.4 Copy settings to other device .....................................................................11-5
11.5 Compare settings ..........................................................................................11-5
11.5.1 Compare against defaults .............................................................................................11-5
11.5.2 Compare two devices.......................................................................................................11-6
11.6 Back up and restore settings ......................................................................11-6
11.6.1 Back up settings..................................................................................................................11-7
11.6.2 Restore settings ..................................................................................................................11-9
11.7 Upgrade software........................................................................................11-11
11.8 Upgrade firmware .......................................................................................11-12
11.9 Replace module ...........................................................................................11-13
11.10 Battery...........................................................................................................11-14
11.10.1 Replace battery for SH/SL power supply .............................................................11-14
11.10.2 Dispose of battery...........................................................................................................11-15
11.11 Clear files and data after uninstall ..........................................................11-19
11.12 Repairs...........................................................................................................11-19
11.13 Storage ..........................................................................................................11-20
11.14 Disposal.........................................................................................................11-20
AFLEXANALOG
OPERANDS
A.1 FlexAnalog items .............................................................................................A-1
B RADIUS SERVER
CONFIGURATION
B.1 RADIUS server configuration .........................................................................B-1
C COMMAND LINE
INTERFACE
C.1 Command line interface .................................................................................C-1
D MISCELLANEOUS D.1 Warranty ...........................................................................................................D-1
D.2 Revision history ...............................................................................................D-1
ABBREVIATIONS
INDEX

x L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
TABLE OF CONTENTS