GE L60 User manual

GE
Grid Solutions
Instruction Manual
Product version: 7.41x
GE publication code: 1601-0082-AE1 (GEK-130984)
L60
Line Phase Comparison System
1601-0082-AE1
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Copyright © 2017 GE Multilin Inc. All rights reserved.
L60 Line Phase Comparison System Instruction Manual for version 7.41x.
L60, 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: 1601-0082-AE1 (January 2017)

L60 LINE PHASE COMPARISON SYSTEM – INSTRUCTION MANUAL iii
L60 Line Phase Comparison 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
2.2 Security.............................................................................................................. 2-5
2.3 Order codes ...................................................................................................... 2-8
2.3.1 Replacement modules.....................................................................................................2-12
2.4 Signal processing...........................................................................................2-14
2.4.1 UR signal processing ........................................................................................................2-14
2.5 Specifications .................................................................................................2-16
2.5.1 Protection elements..........................................................................................................2-17
2.5.2 User-programmable elements ....................................................................................2-24
2.5.3 Monitoring..............................................................................................................................2-25
2.5.4 Metering..................................................................................................................................2-26
2.5.5 Inputs .......................................................................................................................................2-27
2.5.6 Power supply........................................................................................................................2-29
2.5.7 Outputs....................................................................................................................................2-29
2.5.8 Communication protocols..............................................................................................2-31
2.5.9 Inter-relay communications..........................................................................................2-32
2.5.10 CyberSentry security.........................................................................................................2-34
2.5.11 Environmental......................................................................................................................2-34
2.5.12 Type tests...............................................................................................................................2-35
2.5.13 Production tests..................................................................................................................2-35
2.5.14 Approvals ...............................................................................................................................2-36
2.5.15 Maintenance.........................................................................................................................2-36
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 ................................................................................................................ 3-9
3.3.1 Typical wiring ......................................................................................................................... 3-9

iv L60 LINE PHASE COMPARISON SYSTEM – INSTRUCTION MANUAL
TABLE OF CONTENTS
3.3.2 Dielectric strength ................................................................................................................3-9
3.3.3 Control power......................................................................................................................3-10
3.3.4 CT/VT modules ....................................................................................................................3-11
3.3.5 Contact inputs and outputs ..........................................................................................3-12
3.3.6 Transducer inputs and outputs...................................................................................3-19
3.3.7 RS232 faceplate port........................................................................................................3-21
3.3.8 CPU communication ports ............................................................................................3-22
3.3.9 IRIG-B.......................................................................................................................................3-24
3.3.10 L60 channel communications .....................................................................................3-25
3.4 Direct input and output communications ................................................3-27
3.4.1 Description............................................................................................................................3-27
3.4.2 Fiber: LED and ELED transmitters...............................................................................3-29
3.4.3 Fiber laser transmitters...................................................................................................3-29
3.4.4 G.703 interface....................................................................................................................3-30
3.4.5 RS422 interface...................................................................................................................3-34
3.4.6 RS422 and fiber interface ..............................................................................................3-36
3.4.7 G.703 and fiber interface................................................................................................3-37
3.4.8 IEEE C37.94 interface .......................................................................................................3-37
3.4.9 C37.94SM interface...........................................................................................................3-40
3.5 Activate relay .................................................................................................3-43
3.6 Install software ..............................................................................................3-44
3.6.1 EnerVista communication overview ......................................................................... 3-44
3.6.2 System requirements.......................................................................................................3-45
3.6.3 Install software....................................................................................................................3-46
3.7 Add device to software.................................................................................3-47
3.7.1 Set IP address in UR..........................................................................................................3-47
3.7.2 Configure serial connection..........................................................................................3-53
3.7.3 Configure Ethernet connection...................................................................................3-54
3.7.4 Automatic discovery of UR devices...........................................................................3-56
3.8 Connect to the L60 ........................................................................................3-56
3.8.1 Connect to the L60 in EnerVista..................................................................................3-57
3.8.2 Use Quick Connect via the front panel RS232 port............................................3-58
3.8.3 Use Quick Connect via a rear Ethernet port..........................................................3-58
3.9 Set up CyberSentry and change default password.................................3-59
3.10 Import settings...............................................................................................3-60
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
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

TABLE OF CONTENTS
L60 LINE PHASE COMPARISON SYSTEM – INSTRUCTION MANUAL v
4.2.8 Custom LED labeling.........................................................................................................4-24
4.2.9 Breaker control....................................................................................................................4-29
4.2.10 Change passwords............................................................................................................4-30
4.2.11 Invalid password entry ....................................................................................................4-31
4.3 Logic diagrams...............................................................................................4-32
4.4 FlexLogic design and monitoring using Engineer....................................4-33
4.4.1 Design logic...........................................................................................................................4-35
4.4.2 Send file to and from device .........................................................................................4-45
4.4.3 Monitor logic.........................................................................................................................4-46
4.4.4 View front panel and print labels................................................................................4-47
4.4.5 Generate connectivity report........................................................................................4-48
4.4.6 Preferences ...........................................................................................................................4-48
4.4.7 Toolbars ..................................................................................................................................4-52
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 Demand ...............................................................................................................................5-103
5.3.11 User-programmable LEDs ..........................................................................................5-105
5.3.12 User-programmable self-tests .................................................................................5-108
5.3.13 Control pushbuttons......................................................................................................5-109
5.3.14 User-programmable pushbuttons..........................................................................5-110
5.3.15 Flex state parameters...................................................................................................5-115
5.3.16 User-definable displays................................................................................................5-116
5.3.17 Direct inputs and outputs............................................................................................5-118
5.3.18 Teleprotection...................................................................................................................5-124
5.3.19 Installation..........................................................................................................................5-125
5.4 System setup................................................................................................5-125
5.4.1 AC inputs .............................................................................................................................5-125
5.4.2 Power system....................................................................................................................5-127
5.4.3 Signal sources...................................................................................................................5-128
5.4.4 Breakers...............................................................................................................................5-130
5.4.5 Disconnect switches......................................................................................................5-135
5.4.6 FlexCurves...........................................................................................................................5-138
5.5 FlexLogic........................................................................................................5-145
5.5.1 FlexLogic operands ........................................................................................................5-145
5.5.2 FlexLogic rules ..................................................................................................................5-158
5.5.3 FlexLogic evaluation ...................................................................................................... 5-158
5.5.4 FlexLogic example ..........................................................................................................5-159
5.5.5 FlexLogic equation editor............................................................................................5-164
5.5.6 FlexLogic timers ...............................................................................................................5-164
5.5.7 FlexElements......................................................................................................................5-164
5.5.8 Non-volatile latches .......................................................................................................5-168
5.6 Grouped elements.......................................................................................5-169

vi L60 LINE PHASE COMPARISON SYSTEM – INSTRUCTION MANUAL
TABLE OF CONTENTS
5.6.1 Overview ............................................................................................................................. 5-169
5.6.2 Setting group 1................................................................................................................. 5-169
5.6.3 Phase comparison elements..................................................................................... 5-170
5.6.4 Line pickup ......................................................................................................................... 5-188
5.6.5 Distance............................................................................................................................... 5-191
5.6.6 Power swing detect (ANSI 68).................................................................................... 5-211
5.6.7 Load encroachment...................................................................................................... 5-220
5.6.8 Phase current ................................................................................................................... 5-221
5.6.9 Neutral current................................................................................................................. 5-233
5.6.10 Wattmetric ground fault.............................................................................................. 5-241
5.6.11 Ground current ................................................................................................................ 5-245
5.6.12 Negative sequence current........................................................................................ 5-248
5.6.13 Breaker failure (ANSI 50BF)......................................................................................... 5-254
5.6.14 Voltage elements ............................................................................................................ 5-264
5.7 Control elements .........................................................................................5-273
5.7.1 Overview ............................................................................................................................. 5-273
5.7.2 Trip bus ................................................................................................................................ 5-273
5.7.3 Setting groups .................................................................................................................. 5-275
5.7.4 Selector switch................................................................................................................. 5-276
5.7.5 Trip output.......................................................................................................................... 5-283
5.7.6 Synchrocheck (ANSI 25) ............................................................................................... 5-289
5.7.7 Digital elements............................................................................................................... 5-294
5.7.8 Digital counters................................................................................................................ 5-297
5.7.9 Monitoring elements ..................................................................................................... 5-299
5.7.10 Pilot schemes.................................................................................................................... 5-322
5.7.11 Autoreclose (ANSI 79).................................................................................................... 5-324
5.8 Inputs/outputs .............................................................................................5-338
5.8.1 Contact inputs.................................................................................................................. 5-338
5.8.2 Virtual inputs..................................................................................................................... 5-340
5.8.3 Contact outputs............................................................................................................... 5-341
5.8.4 Virtual outputs.................................................................................................................. 5-344
5.8.5 Resetting ............................................................................................................................. 5-344
5.8.6 Direct inputs and outputs ........................................................................................... 5-345
5.8.7 Teleprotection................................................................................................................... 5-348
5.9 Transducer inputs/outputs........................................................................5-350
5.9.1 DCmA inputs...................................................................................................................... 5-350
5.9.2 RTD inputs .......................................................................................................................... 5-351
5.9.3 DCmA outputs .................................................................................................................. 5-352
5.10 Testing ...........................................................................................................5-356
5.10.1 Test mode function ........................................................................................................5-356
5.10.2 Test mode forcing........................................................................................................... 5-356
5.10.3 Force contact inputs ..................................................................................................... 5-357
5.10.4 Force contact outputs .................................................................................................. 5-357
6 ACTUAL VALUES 6.1 Actual values menu.........................................................................................6-1
6.2 Front panel........................................................................................................6-3
6.3 Status.................................................................................................................6-4
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 Teleprotection inputs ..........................................................................................................6-5
6.3.6 Contact outputs.....................................................................................................................6-5
6.3.7 Virtual outputs........................................................................................................................6-5
6.3.8 RxGOOSE status.....................................................................................................................6-6

TABLE OF CONTENTS
L60 LINE PHASE COMPARISON SYSTEM – INSTRUCTION MANUAL vii
6.3.9 RxGOOSE statistics .............................................................................................................. 6-6
6.3.10 Autoreclose ............................................................................................................................. 6-6
6.3.11 Digital counters ..................................................................................................................... 6-7
6.3.12 Selector switches.................................................................................................................. 6-7
6.3.13 Flex States................................................................................................................................ 6-7
6.3.14 Ethernet .................................................................................................................................... 6-7
6.3.15 Real time clock synchronizing........................................................................................ 6-8
6.3.16 Direct inputs............................................................................................................................ 6-8
6.3.17 Direct devices status .......................................................................................................... 6-9
6.3.18 Teleprotection channel tests .......................................................................................... 6-9
6.3.19 Remaining connection status.......................................................................................6-10
6.3.20 Parallel Redundancy Protocol (PRP)...........................................................................6-10
6.3.21 TxGOOSE status ..................................................................................................................6-11
6.4 Metering ..........................................................................................................6-11
6.4.1 Metering conventions.......................................................................................................6-11
6.4.2 Sources....................................................................................................................................6-15
6.4.3 Synchrocheck.......................................................................................................................6-19
6.4.4 Tracking frequency............................................................................................................6-20
6.4.5 FlexElements.........................................................................................................................6-20
6.4.6 RxGOOSE analogs ..............................................................................................................6-21
6.4.7 Wattmetric ground fault.................................................................................................6-21
6.4.8 Transducer inputs/outputs............................................................................................6-21
6.4.9 Distance..................................................................................................................................6-22
6.5 Records............................................................................................................6-23
6.5.1 Fault reports .........................................................................................................................6-23
6.5.2 Event records .......................................................................................................................6-24
6.5.3 Oscillography........................................................................................................................6-25
6.5.4 Data logger ...........................................................................................................................6-26
6.5.5 Breaker maintenance.......................................................................................................6-26
6.6 Product information......................................................................................6-27
6.6.1 Model information..............................................................................................................6-27
6.6.2 Firmware revisions ............................................................................................................6-27
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 Security ..................................................................................................................................... 7-4
7.2 Targets menu ................................................................................................... 7-4
7.2.1 Target messages .................................................................................................................. 7-5
7.2.2 Relay self-tests ...................................................................................................................... 7-5
8 APPLICATION OF
SETTINGS
8.1 87PC phase comparison element................................................................. 8-1
8.1.1 Overview................................................................................................................................... 8-1
8.1.2 Settings ..................................................................................................................................... 8-1
8.1.3 Settings example.................................................................................................................. 8-3
8.2 Distance/backup supervision........................................................................ 8-4
8.2.1 Overview................................................................................................................................... 8-4
8.2.2 Lines with tapped transformers.................................................................................... 8-5
8.2.3 Transformer load currents............................................................................................... 8-6
8.2.4 Low-voltage-side faults..................................................................................................... 8-6
8.2.5 Transformer inrush current ............................................................................................. 8-6
8.2.6 Tractional load....................................................................................................................... 8-7

viii L60 LINE PHASE COMPARISON SYSTEM – INSTRUCTION MANUAL
TABLE OF CONTENTS
8.2.7 Sensitivity issues....................................................................................................................8-7
8.2.8 Single-pole tripping applications...................................................................................8-9
8.2.9 Phase distance....................................................................................................................8-10
8.2.10 Ground distance.................................................................................................................8-11
8.3 POTT signaling scheme.................................................................................8-11
8.3.1 Overview ................................................................................................................................8-11
8.4 Series compensated lines ............................................................................8-12
8.4.1 Distance settings................................................................................................................8-12
8.5 Understanding L60 oscillography...............................................................8-14
8.5.1 Overview ................................................................................................................................8-14
8.5.2 Two-breaker configuration ...........................................................................................8-15
9 THEORY OF
OPERATION
9.1 Overview ........................................................................................................... 9-1
9.1.1 Introduction .............................................................................................................................9-1
9.1.2 Fundamental principle of phase comparison .........................................................9-1
9.1.3 Variations in phase comparison schemes................................................................9-7
9.1.4 Phase comparison excitation..........................................................................................9-8
9.1.5 Blocking versus tripping schemes .............................................................................9-12
9.1.6 Single versus dual phase comparison .....................................................................9-20
9.1.7 Refinements to basic schemes....................................................................................9-22
9.1.8 Multi-terminal lines ...........................................................................................................9-26
9.1.9 Charging current compensation ................................................................................9-26
9.1.10 L60 signal processing ......................................................................................................9-28
9.2 Single-pole tripping.......................................................................................9-36
9.2.1 Overview ................................................................................................................................9-36
9.2.2 Phase selection...................................................................................................................9-39
9.3 Fault locator ...................................................................................................9-41
9.3.1 Fault type determination................................................................................................9-41
10 MAINTENANCE 10.1 Monitoring.......................................................................................................10-1
10.1.1 Devices with Site Targets ...............................................................................................10-1
10.1.2 Data with Modbus Analyzer..........................................................................................10-1
10.2 General maintenance ...................................................................................10-3
10.2.1 In-service maintenance..................................................................................................10-3
10.2.2 Out-of-service maintenance ........................................................................................10-3
10.2.3 Unscheduled maintenance (system interruption) ..............................................10-3
10.3 Retrieve files ...................................................................................................10-3
10.3.1 CyberSentry security event files..................................................................................10-4
10.4 Compare settings ..........................................................................................10-5
10.4.1 Compare against defaults.............................................................................................10-5
10.4.2 Compare two devices ...................................................................................................... 10-5
10.5 Back up and restore settings.......................................................................10-6
10.5.1 Back up settings .................................................................................................................10-6
10.5.2 Restore settings..................................................................................................................10-8
10.6 Upgrade software........................................................................................10-10
10.7 Upgrade firmware .......................................................................................10-11
10.8 Replace module............................................................................................10-12
10.9 Battery...........................................................................................................10-14
10.9.1 Replace battery for SH/SL power supply............................................................. 10-14
10.9.2 Dispose of battery .......................................................................................................... 10-15
10.10 Clear files and data after uninstall...........................................................10-18
10.11 Repairs...........................................................................................................10-19
10.12 Storage ..........................................................................................................10-19

TABLE OF CONTENTS
L60 LINE PHASE COMPARISON SYSTEM – INSTRUCTION MANUAL ix
10.13 Disposal.........................................................................................................10-20
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

xL60 LINE PHASE COMPARISON SYSTEM – INSTRUCTION MANUAL
TABLE OF CONTENTS

L60 LINE PHASE COMPARISON SYSTEM – INSTRUCTION MANUAL 1-1
L60 Line Phase Comparison System
Chapter 1: Introduction
Introduction
This chapter outlines safety and technical support information.
1.1 Safety symbols and definitions
Before attempting to install or use the device, review all safety indicators in this document to help prevent injury,
equipment damage, or downtime.
The following safety and equipment symbols are used in this document.
1.1.1 General cautions and warnings
The following general safety precautions and warnings apply.
Follow the requirements of this manual, including adequate wiring size and type, terminal torque settings, voltage,
current magnitudes applied, and adequate isolation/clearance in external wiring from high to low voltage circuits.
Use the device only for its intended purpose and application.
Ensure that all ground paths are uncompromised for safety purposes during device operation and service.
Ensure that the control power applied to the device, the AC current, and voltage input match the ratings specified on
the relay nameplate. Do not apply current or voltage in excess of the specified limits.
Indicates a hazardous situation which, if not avoided, will result in death or serious injury.
Indicates a hazardous situation which, if not avoided, could result in death or serious injury.
Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.
Indicates practices not related to personal injury.
Ensure that all connections to the product are correct so as to avoid accidental risk of shock
and/or fire, for example such as can arise from high voltage connected to low voltage terminals.

1-2 L60 LINE PHASE COMPARISON SYSTEM – INSTRUCTION MANUAL
FOR FURTHER ASSISTANCE CHAPTER 1: INTRODUCTION
1
Only qualified personnel are to operate the device. Such personnel must be thoroughly familiar with all safety
cautions and warnings in this manual and with applicable country, regional, utility, and plant safety regulations.
Hazardous voltages can exist in the power supply and at the device connection to current transformers, voltage
transformers, control, and test circuit terminals. Make sure all sources of such voltages are isolated prior to
attempting work on the device.
Hazardous voltages can exist when opening the secondary circuits of live current transformers. Make sure that
current transformer secondary circuits are shorted out before making or removing any connection to the current
transformer (CT) input terminals of the device.
For tests with secondary test equipment, ensure that no other sources of voltages or currents are connected to such
equipment and that trip and close commands to the circuit breakers or other switching apparatus are isolated,
unless this is required by the test procedure and is specified by appropriate utility/plant procedure.
When the device is used to control primary equipment, such as circuit breakers, isolators, and other switching
apparatus, all control circuits from the device to the primary equipment must be isolated while personnel are working
on or around this primary equipment to prevent any inadvertent command from this device.
Use an external disconnect to isolate the mains voltage supply.
Personal safety can be affected if the product is physically modified by the end user. Modifications to the product
outside of recommended wiring configuration, hardware, or programming boundaries is not recommended end-use
practice. Product disassembly and repairs are not permitted. All service needs to be conducted by the factory.
1.2 For further assistance
For product support, contact the information and call center as follows:
GE Grid Solutions
650 Markland Street
Markham, Ontario
Canada L6C 0M1
Worldwide telephone: [phone]
Europe/Middle East/Africa telephone: [phone]
North America toll-free: 1 800 547 8629
Fax: [phone]
Worldwide e-mail: multilin.t[email protected]
Europe e-mail: multilin.tech.[email protected]
Website: http://www.gegridsolutions.com/multilin
When contacting GE by e-mail, optionally include a device information file, which is generated in the EnerVista software by
clicking the Service Report button.
LED transmitters are classified as IEC 60825-1 Accessible Emission Limit (AEL) Class 1M. Class 1M
devices are considered safe to the unaided eye. Do not view directly with optical instruments.
This product is rated to Class A emissions levels and is to be used in Utility, Substation Industrial
environments. Not to be used near electronic devices rated for Class B levels.

CHAPTER 1: INTRODUCTION FOR FURTHER ASSISTANCE
L60 LINE PHASE COMPARISON SYSTEM – INSTRUCTION MANUAL 1-3
1
Figure 1-1: Generate service report

1-4 L60 LINE PHASE COMPARISON SYSTEM – INSTRUCTION MANUAL
FOR FURTHER ASSISTANCE CHAPTER 1: INTRODUCTION
1

L60 LINE PHASE COMPARISON SYSTEM – INSTRUCTION MANUAL 2-1
L60 Line Phase Comparison System
Chapter 2: Product description
Product descript ion
This chapter outlines the product, order codes, and specifications.
2.1 Product description
The L60 Line Phase Comparison System is part of the Universal Relay (UR) series of products. It provides a simple phase-
comparison principle successfully employed by analog and static relays for many years, along with the significant
advantages of a modern microprocessor-based relay. The phase comparison element performs the following calculations:
• Samples and filters three-phase AC currents at a rate of 64 samples per cycle
• Computes sequence components of the current
• If two CT/VT modules are employed for breaker-and-a-half applications, the relay sums up two currents and performs
the breaker-and-the-half logic calculations
• Forms a composite signal from current components according to a user-defined setting
• Forms local positive and negative squares from the composite signal sent to remote terminal and used locally along
with the channel delay value
• Samples received from remote terminal squares 64 samples per cycle measuring magnitude of the pulse voltage
• Processes received samples to compensate for asymmetry and distortions in the signal
• Detects fault condition with the fault detector
• Compares coincidence of local and remote squares which indicate the presence of internal or external faults
• Detects transient conditions to block the phase comparison function
All processed signals, including transmitted and received pulses, are available in oscillography for commissioning,
maintenance, and analysis. The L60 integrates received pulses on a sample-per-sample basis, similar to the analog phase-
comparison principle, making the relay exceptionally robust on noisy channels. All permissive and blocking schemes, as
well as single and dual phase comparison, are incorporated into a single protection element and can be selected with a
relay setting. The L60 supports two and three-terminal applications, can be used for single- and three-pole tripping
applications, and supports breaker-and-a-half applications. Multiple backup functions include three-zone phase and
ground distance, directional overcurrent, pilot schemes, and current and voltage elements.
Control features include synchrocheck, autoreclosure, and control for two breakers. Monitoring features include CT failure
detector, VT fuse failure detector, breaker arcing current, disturbance detector and continuous monitor.
Diagnostic features include an event recorder capable of storing 1024 time-tagged events, oscillography capable of
storing up to 64 records with programmable trigger, content, and sampling rate, and data logger acquisition of up to 16
channels, with programmable content and sampling rate. The internal clock used for time-tagging can be synchronized

2-2 L60 LINE PHASE COMPARISON SYSTEM – INSTRUCTION MANUAL
PRODUCT DESCRIPTION CHAPTER 2: PRODUCT DESCRIPTION
2
with an IRIG-B signal, using the Simple Network Time Protocol (SNTP) over the Ethernet port, or using the Precision Time
Protocol (PTP). This precise time stamping allows the sequence of events to be determined throughout the system. Events
can also be programmed (via FlexLogic™ equations) to trigger oscillography data capture that can be set to record the
measured parameters before and after the event for viewing on a computer. These tools significantly reduce
troubleshooting time and simplify report generation in the event of a system fault.
Several options are available for communication. A faceplate RS232 port can be used to connect to a computer to
program settings and monitor actual values. The rear RS485 port allows independent access by operating and engineering
staff. It can be connected to system computers with baud rates up to 115.2 kbps. All serial ports use the Modbus RTU
protocol. The IEC 60870-5-103 protocol is supported on the RS485 interface. IEC 60870-5-103, DNP, and Modbus cannot be
enabled simultaneously on this interface. Also only one of the DNP, IEC 60870-5-103, and IEC 60870-5-104 protocols can
be enabled at any time on the relay. When the IEC 60870-5-103 protocol is chosen, the RS485 port has a fixed even parity
and the baud rate can be either 9.6 kbps or 19.2 kbps. The 100Base-FX or 100Base-TX Ethernet interface provides fast,
reliable communications in noisy environments. The Ethernet port supports IEC 61850, Modbus/TCP, TFTP, and PTP
(according to IEEE Std. 1588-2008 or IEC 61588), and it allows access to the relay via any standard web browser (UR web
pages). The IEC 60870-5-104 protocol is supported on the Ethernet port. The Ethernet port also supports the Parallel
Redundancy Protocol (PRP) of IEC 62439-3 (clause 4, 2012) when purchased as an option.
Secure Routable GOOSE (R-GOOSE) is supported with software options.
Settings and actual values can be accessed from the front panel or EnerVista software.
The figures show typical two-terminal and three-terminal applications.

CHAPTER 2: PRODUCT DESCRIPTION PRODUCT DESCRIPTION
L60 LINE PHASE COMPARISON SYSTEM – INSTRUCTION MANUAL 2-3
2
Figure 2-1: 87PC communications
The L60 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.

2-4 L60 LINE PHASE COMPARISON SYSTEM – INSTRUCTION MANUAL
PRODUCT DESCRIPTION CHAPTER 2: PRODUCT DESCRIPTION
2
Table 2-1: ANSI device numbers and functions supported
Figure 2-2: Single-line diagram
Table 2-2: Other device functions
Device
number Function Device number Function
21G Ground distance 51P Phase time overcurrent
21P Phase distance 51_2 Negative-sequence time overcurrent
25 Synchrocheck 52 AC circuit breaker
27P Phase undervoltage 59C Compensated overvoltage
27X Auxiliary undervoltage 59N Neutral overvoltage
32N Wattmetric zero-sequence directional 59P Phase overvoltage
49 Thermal overload protection 59X Auxiliary overvoltage
50BF Breaker failure 59_2 Negative-sequence overvoltage
50DD Disturbance detector 67N Neutral directional overcurrent
50G Ground instantaneous overcurrent 67P Phase directional overcurrent
50N Neutral instantaneous overcurrent 67_2 Negative-sequence directional overcurrent
50P Phase instantaneous overcurrent 68 Power swing blocking
50_2 Negative-sequence instantaneous overcurrent 78 Out-of-step tripping
51G Ground time overcurrent 79 Automatic recloser
51N Neutral time overcurrent 87PC Phase comparison
Function Function
Breaker Arcing Current (I2t) Line Pickup
Breaker Control Load Encroachment
Breaker Flashover Metering: Current, Voltage, Power, Frequency
Breaker Restrike Modbus Communications
Contact Inputs (up to 96) Modbus User Map
Contact Outputs (up to 64) Non-Volatile Latches
Control Pushbuttons Non-Volatile Selector Switch
CT Failure Detector Open Breaker Echo
CyberSentry™ Security Open Pole Detector
Data Logger Oscillography

CHAPTER 2: PRODUCT DESCRIPTION SECURITY
L60 LINE PHASE COMPARISON SYSTEM – INSTRUCTION MANUAL 2-5
2
2.2 Security
The following security features are available:
• Password security — Basic security present by default
• EnerVista security — Role-based access to various EnerVista software screens and configuration elements. The
feature is present by default in the EnerVista software.
• CyberSentry security — Advanced security available using a software option. When purchased, the option is
automatically enabled, and the default Password security and EnerVista security are disabled.
2.2.0.1 EnerVista security
The EnerVista security management system is a role-based access control (RBAC) system that allows an administrator to
manage the privileges of multiple users. This allows for access control of UR devices by multiple personnel within a
substation and conforms to the principles of RBAC as defined in ANSI INCITS 359-2004. The EnerVista security
management system is disabled by default to allow the administrator direct access to the EnerVista software after
installation. It is recommended that security be enabled before placing the device in service.
Basic password or enhanced CyberSentry security applies, depending on purchase.
2.2.0.2 Password security
Password security is a basic security feature present by default.
Two levels of password security are provided: command and setting. Use of a password for each level controls whether
users can enter commands and/or change settings.
The L60 supports password entry from a local or remote connection. Local access is defined as any access to settings or
commands via the faceplate interface. This includes both keypad entry and the through the faceplate RS232 port. Remote
access is defined as any access to settings or commands via any rear communications port. This includes both Ethernet
and RS485 connections. Any changes to the local or remote passwords enables this functionality.
When entering a settings or command password via EnerVista or any serial interface, the user must enter the
corresponding connection password. If the connection is to the back of the L60, the remote password must be used. If the
connection is to the RS232 port of the faceplate, the local password applies.
Password access events are logged in the Event Recorder.
Demand Pilot Scheme (POTT)
Digital Counters (8) Setting Groups (6)
Digital Elements (48) Time synchronization over IRIG-B or IEEE 1588
Direct Inputs and Outputs (32) Time Synchronization over SNTP
Disconnect Switches Transducer Inputs/Outputs
DNP 3.0 or IEC 60870-5-104 Communications Trip Bus
Event Recorder User Definable Display
Fault Location User Programmable LEDs
Fault Reporting User Programmable Pushbuttons
FlexElements™ (8) User Programmable Self-Tests
FlexLogic Equations Virtual Inputs (64)
IEC 60870-5-103 Communications Virtual Outputs (96)
IEC 61850 Communications VT Fuse Failure
IEC 62351-9 Data and Communications Security
Function Function

2-6 L60 LINE PHASE COMPARISON SYSTEM – INSTRUCTION MANUAL
SECURITY CHAPTER 2: PRODUCT DESCRIPTION
2
2.2.0.3 CyberSentry security
CyberSentry embedded security is available using a software option (Level 1) that provide advanced security services.
When the option is purchased, the basic password security is disabled automatically.
CyberSentry provides security through the following features:
• An Authentication, Authorization, Accounting (AAA) Remote Authentication Dial-In User Service (RADIUS) client that is
centrally managed, enables user attribution, provides accounting of all user activities, and uses secure standards-
based strong cryptography for authentication and credential protection
• A Role-Based Access Control (RBAC) system that provides a permission model that allows access to UR device
operations and configurations based on specific roles and individual user accounts configured on the AAA server (that
is, Administrator, Supervisor, Engineer, Operator, Observer roles)
• Security event reporting through the Syslog protocol for supporting Security Information Event Management (SIEM)
systems for centralized cybersecurity monitoring
• Strong encryption of all access and configuration network messages between the EnerVista software and UR devices
using the Secure Shell (SSH) protocol, the Advanced Encryption Standard (AES), and 128-bit keys in Galois Counter
Mode (GCM) as specified in the U.S. National Security Agency Suite B extension for SSH and approved by the National
Institute of Standards and Technology (NIST) FIPS-140-2 standards for cryptographic systems
CyberSentry user roles
CyberSentry user roles (Administrator, Engineer, Operator, Supervisor, Observer) limit the levels of access to various UR
device functions. This means that the EnerVista software allows for access to functionality based on the user’s logged in
role.
Example: Administrative functions can be segmented away from common operator functions, or engineering type access,
all of which are defined by separate roles (see figure) so that access of UR devices by multiple personnel within a
substation is allowed.
Figure 2-3: CyberSentry user roles
The table lists user roles and their corresponding capabilities.
Table 2-3: Permissions by user role for CyberSentry
Roles Administrator Engineer Operator Supervisor Observer
Complete access Complete access
except for
CyberSentry
Security
Command
menu Authorizes writing Default role
Device Definition R R R R R
Settings
|---------- Product Setup
|--------------- Security
(CyberSentry) RW R R R R