GE b30 User manual

GE
Grid Solutions
Instruction Manual
Product version: 7.6x
GE publication code: 1601-0109-AF2 (GEK-130991A)
B30
Bus Differential System
1601-0109-AF2
LISTED
52TL
IND.CONT. EQ.
E83849
IISO 9001
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Copyright © 2017 GE Multilin Inc. All rights reserved.
B30 Bus Differential System Instruction Manual for version 7.6x.
B30, 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: 1601-0109-AF2 (October 2017)

B30 BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL iii
B30 Bus Differential System
Table of contents
1INTRODUCTION 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 .................................................................................................................... 2-4
2.3 Order codes............................................................................................................. 2-8
2.3.1 Order codes with enhanced CT/VT modules........................................................... 2-9
2.3.2 Order codes with process bus modules..................................................................2-12
2.3.3 Replacement modules.....................................................................................................2-15
2.4 Signal processing.................................................................................................2-17
2.4.1 UR signal processing ........................................................................................................2-17
2.5 Specifications........................................................................................................2-19
2.5.1 Protection elements..........................................................................................................2-20
2.5.2 User-programmable elements ....................................................................................2-22
2.5.3 Monitoring..............................................................................................................................2-24
2.5.4 Metering..................................................................................................................................2-25
2.5.5 Inputs .......................................................................................................................................2-26
2.5.6 Power supply........................................................................................................................2-27
2.5.7 Outputs....................................................................................................................................2-28
2.5.8 Communication protocols..............................................................................................2-30
2.5.9 Inter-relay communications..........................................................................................2-31
2.5.10 CyberSentry security.........................................................................................................2-32
2.5.11 Graphical front panel........................................................................................................2-32
2.5.12 Environmental......................................................................................................................2-33
2.5.13 Type tests...............................................................................................................................2-34
2.5.14 Production tests..................................................................................................................2-34
2.5.15 Approvals ...............................................................................................................................2-35
2.5.16 Maintenance.........................................................................................................................2-35
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........................................................................................................................... 3-6

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TABLE OF CONTENTS
3.2.3 Rear terminal layout.........................................................................................................3-11
3.3 Wiring .....................................................................................................................3-14
3.3.1 Typical wiring.......................................................................................................................3-14
3.3.2 Dielectric strength .............................................................................................................3-15
3.3.3 Control power......................................................................................................................3-15
3.3.4 CT/VT modules ....................................................................................................................3-16
3.3.5 Process bus modules .......................................................................................................3-18
3.3.6 Contact inputs and outputs ..........................................................................................3-18
3.3.7 Transducer inputs and outputs...................................................................................3-30
3.3.8 RS232 port.............................................................................................................................3-32
3.3.9 CPU communication ports ............................................................................................3-33
3.3.10 IRIG-B.......................................................................................................................................3-35
3.4 Direct input and output communications .......................................................3-36
3.4.1 Description............................................................................................................................3-36
3.4.2 Fiber: LED and ELED transmitters...............................................................................3-38
3.4.3 Fiber laser transmitters...................................................................................................3-38
3.4.4 G.703 interface....................................................................................................................3-39
3.4.5 RS422 interface...................................................................................................................3-43
3.4.6 RS422 and fiber interface ..............................................................................................3-45
3.4.7 G.703 and fiber interface................................................................................................3-46
3.4.8 IEEE C37.94 interface .......................................................................................................3-46
3.4.9 C37.94SM interface...........................................................................................................3-49
3.5 Activate relay ........................................................................................................3-52
3.6 Install software.....................................................................................................3-53
3.6.1 EnerVista communication overview ......................................................................... 3-53
3.6.2 System requirements.......................................................................................................3-54
3.6.3 Install software....................................................................................................................3-55
3.7 Add device to software........................................................................................3-56
3.7.1 Set IP address in UR..........................................................................................................3-57
3.7.2 Configure serial connection..........................................................................................3-62
3.7.3 Configure Ethernet connection...................................................................................3-64
3.7.4 Configure modem connection.....................................................................................3-65
3.7.5 Automatic discovery of UR devices...........................................................................3-65
3.8 Connect to the B30...............................................................................................3-66
3.8.1 Connect to the B30 in EnerVista .................................................................................3-66
3.8.2 Use Quick Connect via front RS232 port.................................................................3-67
3.8.3 Use Quick Connect via front USB port .....................................................................3-68
3.8.4 Use Quick Connect via a rear Ethernet port..........................................................3-68
3.9 Set up CyberSentry and change default password........................................3-69
3.10 Import settings .....................................................................................................3-70
3.11 Connect to D400 gateway...................................................................................3-71
3.11.1 Oscillography files..............................................................................................................3-71
3.11.2 Event records.......................................................................................................................3-71
3.11.3 Log files...................................................................................................................................3-71
3.11.4 Setting files............................................................................................................................3-72
4INTERFACES 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

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B30 BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL v
4.1.9 Settings file traceability...................................................................................................4-12
4.2 Front panel interface...........................................................................................4-15
4.2.1 Front panel ............................................................................................................................4-15
4.2.2 Front panel display............................................................................................................4-17
4.2.3 Front panel navigation keys..........................................................................................4-37
4.2.4 LED indicators ......................................................................................................................4-38
4.2.5 Front panel labelling .........................................................................................................4-43
4.2.6 Menu navigation.................................................................................................................4-49
4.2.7 Change settings ..................................................................................................................4-51
4.2.8 View actual values.............................................................................................................4-56
4.2.9 Breaker control....................................................................................................................4-57
4.2.10 Change passwords............................................................................................................4-58
4.2.11 Invalid password entry ....................................................................................................4-59
4.3 Logic diagrams.....................................................................................................4-59
4.4 FlexLogic design using Engineer .......................................................................4-61
4.4.1 Design logic...........................................................................................................................4-63
4.4.2 Send file to and from device .........................................................................................4-73
4.4.3 Monitor logic.........................................................................................................................4-74
4.4.4 View front panel and print labels................................................................................4-75
4.4.5 Generate connectivity report........................................................................................4-76
4.4.6 Preferences ...........................................................................................................................4-76
4.4.7 Toolbars ..................................................................................................................................4-80
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.......................................................................................................... 5-7
5.3.1 Security ..................................................................................................................................... 5-7
5.3.2 Display properties ..............................................................................................................5-25
5.3.3 Graphical front panel........................................................................................................5-27
5.3.4 Clear relay records.............................................................................................................5-39
5.3.5 Communications ................................................................................................................5-40
5.3.6 Modbus user map ...........................................................................................................5-108
5.3.7 Real-time clock.................................................................................................................5-109
5.3.8 User-programmable fault report.............................................................................5-114
5.3.9 Oscillography.....................................................................................................................5-114
5.3.10 Data logger ........................................................................................................................5-117
5.3.11 Demand ...............................................................................................................................5-118
5.3.12 User-programmable LEDs ..........................................................................................5-119
5.3.13 User-programmable self-tests .................................................................................5-124
5.3.14 Control pushbuttons......................................................................................................5-124
5.3.15 User-programmable pushbuttons..........................................................................5-126
5.3.16 Flex state parameters...................................................................................................5-131
5.3.17 User-definable displays................................................................................................5-132
5.3.18 Direct inputs and outputs............................................................................................5-134
5.3.19 Teleprotection...................................................................................................................5-140
5.3.20 Installation..........................................................................................................................5-141
5.4 Remote resources..............................................................................................5-141
5.4.1 Remote resources configuration .............................................................................5-141
5.5 System setup.......................................................................................................5-143
5.5.1 AC inputs .............................................................................................................................5-143
5.5.2 Power system....................................................................................................................5-144
5.5.3 Signal sources...................................................................................................................5-145
5.5.4 Breakers...............................................................................................................................5-147

vi B30 BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
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5.5.5 Disconnect switch control .......................................................................................... 5-153
5.5.6 FlexCurves.......................................................................................................................... 5-158
5.5.7 Bus ......................................................................................................................................... 5-165
5.6 FlexLogic.............................................................................................................. 5-166
5.6.1 FlexLogic operands........................................................................................................ 5-166
5.6.2 FlexLogic rules.................................................................................................................. 5-177
5.6.3 FlexLogic evaluation...................................................................................................... 5-178
5.6.4 FlexLogic example..........................................................................................................5-178
5.6.5 FlexLogic equation editor............................................................................................ 5-183
5.6.6 FlexLogic timers............................................................................................................... 5-183
5.6.7 FlexElements ..................................................................................................................... 5-183
5.6.8 Non-volatile latches.......................................................................................................5-188
5.7 Grouped elements............................................................................................. 5-189
5.7.1 Overview ............................................................................................................................. 5-189
5.7.2 Setting group 1................................................................................................................. 5-189
5.7.3 Bus differential ................................................................................................................. 5-190
5.7.4 Phase current ................................................................................................................... 5-194
5.7.5 Neutral current................................................................................................................. 5-206
5.7.6 Ground current ................................................................................................................ 5-209
5.7.7 Breaker failure (ANSI 50BF)......................................................................................... 5-212
5.7.8 Voltage elements ............................................................................................................ 5-221
5.8 Control elements ............................................................................................... 5-226
5.8.1 Overview ............................................................................................................................. 5-226
5.8.2 Trip bus ................................................................................................................................ 5-226
5.8.3 Setting groups .................................................................................................................. 5-228
5.8.4 Selector switch................................................................................................................. 5-229
5.8.5 Digital elements............................................................................................................... 5-236
5.8.6 Digital counters................................................................................................................ 5-239
5.8.7 Monitoring elements ..................................................................................................... 5-241
5.9 Inputs/outputs ................................................................................................... 5-256
5.9.1 Contact inputs.................................................................................................................. 5-256
5.9.2 Virtual inputs..................................................................................................................... 5-258
5.9.3 Contact outputs............................................................................................................... 5-259
5.9.4 Virtual outputs.................................................................................................................. 5-263
5.9.5 Resetting ............................................................................................................................. 5-263
5.9.6 Direct inputs and outputs ........................................................................................... 5-264
5.9.7 Teleprotection................................................................................................................... 5-268
5.10 Transducer inputs/outputs.............................................................................. 5-270
5.10.1 DCmA inputs...................................................................................................................... 5-270
5.10.2 RTD inputs .......................................................................................................................... 5-271
5.10.3 DCmA outputs .................................................................................................................. 5-272
5.11 Testing................................................................................................................. 5-275
5.11.1 Test mode function ........................................................................................................5-275
5.11.2 Test mode forcing........................................................................................................... 5-276
5.11.3 Force contact inputs ..................................................................................................... 5-276
5.11.4 Force contact outputs .................................................................................................. 5-277
6 ACTUAL VALUES 6.1 Actual Values menu ...............................................................................................6-1
6.2 Front panel...............................................................................................................6-3
6.2.1 Enhanced and standard front panels .........................................................................6-3
6.2.2 Graphical front panel..........................................................................................................6-4
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 ..................................................................................................6-5

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B30 BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL vii
6.3.4 RxGOOSE DPS inputs .......................................................................................................... 6-5
6.3.5 Teleprotection inputs.......................................................................................................... 6-5
6.3.6 Contact outputs .................................................................................................................... 6-5
6.3.7 Virtual outputs ....................................................................................................................... 6-6
6.3.8 RxGOOSE status.................................................................................................................... 6-6
6.3.9 RxGOOSE statistics .............................................................................................................. 6-6
6.3.10 Digital counters ..................................................................................................................... 6-7
6.3.11 Selector switches.................................................................................................................. 6-7
6.3.12 Flex States................................................................................................................................ 6-7
6.3.13 Ethernet .................................................................................................................................... 6-8
6.3.14 Real time clock synchronizing........................................................................................ 6-8
6.3.15 Direct inputs............................................................................................................................ 6-9
6.3.16 Direct devices status .......................................................................................................... 6-9
6.3.17 EGD protocol status ..........................................................................................................6-10
6.3.18 Teleprotection channel tests ........................................................................................6-10
6.3.19 Remaining connection status.......................................................................................6-11
6.3.20 Parallel Redundancy Protocol (PRP)...........................................................................6-11
6.3.21 TxGOOSE status ..................................................................................................................6-12
6.4 Metering.................................................................................................................6-12
6.4.1 Metering conventions.......................................................................................................6-12
6.4.2 Bus zone .................................................................................................................................6-16
6.4.3 Sources....................................................................................................................................6-16
6.4.4 Tracking frequency............................................................................................................6-21
6.4.5 FlexElements.........................................................................................................................6-21
6.4.6 RxGOOSE analogs ..............................................................................................................6-22
6.4.7 Transducer inputs and outputs ...................................................................................6-22
6.5 Records ..................................................................................................................6-22
6.5.1 User-programmable fault reports..............................................................................6-22
6.5.2 Event records .......................................................................................................................6-23
6.5.3 Oscillography........................................................................................................................6-24
6.5.4 Data logger ...........................................................................................................................6-25
6.5.5 Breaker maintenance.......................................................................................................6-25
6.6 Product information ............................................................................................ 6-26
6.6.1 Model information..............................................................................................................6-26
6.6.2 Firmware revisions ............................................................................................................6-26
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.......................................................................................................... 7-5
7.2.1 Target messages .................................................................................................................. 7-5
7.2.2 Relay self-tests ...................................................................................................................... 7-6
8 APPLICATION OF
SETTINGS
8.1 Overview.................................................................................................................. 8-1
8.1.1 Introduction............................................................................................................................. 8-1
8.1.2 Sample busbar and data.................................................................................................. 8-2
8.2 Zoning and dynamic bus replica ......................................................................... 8-3
8.2.1 Description .............................................................................................................................. 8-3
8.2.2 North bus zone ...................................................................................................................... 8-3
8.2.3 South bus zone...................................................................................................................... 8-4
8.3 Biased characteristic breakpoints...................................................................... 8-5

viii B30 BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
TABLE OF CONTENTS
8.3.1 Description...............................................................................................................................8-5
8.3.2 High breakpoint.....................................................................................................................8-6
8.3.3 Low breakpoint ......................................................................................................................8-6
8.4 Slopes and high set threshold..............................................................................8-7
8.4.1 Description...............................................................................................................................8-7
8.4.2 External faults on C-1 .........................................................................................................8-7
8.4.3 External faults on C-2 .........................................................................................................8-9
8.4.4 External faults on C-3 .........................................................................................................8-9
8.4.5 External faults on C-4 ......................................................................................................8-10
8.4.6 External faults on C-5 ......................................................................................................8-10
8.5 Bus differential settings......................................................................................8-11
8.5.1 Description............................................................................................................................8-11
8.6 Enhancing relay performance............................................................................8-12
8.6.1 Using setting groups ........................................................................................................8-12
9 THEORY OF
OPERATION
9.1 Introduction.............................................................................................................9-1
9.1.1 Bus differential protection ................................................................................................9-1
9.2 Dynamic bus replica ..............................................................................................9-3
9.2.1 Dynamic bus replica mechanism..................................................................................9-3
9.2.2 CT ratio matching .................................................................................................................9-4
9.3 Differential principle..............................................................................................9-5
9.3.1 Biased differential characteristic...................................................................................9-5
9.3.2 Differential and restraining currents ...........................................................................9-6
9.3.3 Enhanced security................................................................................................................9-6
9.4 Directional principle...............................................................................................9-7
9.4.1 Current directional protection ........................................................................................9-7
9.5 Saturation detector................................................................................................9-9
9.5.1 CT saturation detection......................................................................................................9-9
9.6 Output logic and examples.................................................................................9-10
9.6.1 Output logic ..........................................................................................................................9-10
9.6.2 Internal and external fault example .........................................................................9-11
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 Convert device settings.......................................................................................10-5
10.5 Copy settings to other device ............................................................................10-7
10.6 Compare settings .................................................................................................10-7
10.6.1 Compare against defaults.............................................................................................10-7
10.6.2 Compare two devices ......................................................................................................10-8
10.7 Back up and restore settings .............................................................................10-8
10.7.1 Back up settings .................................................................................................................10-8
10.7.2 Restore settings............................................................................................................... 10-11
10.8 Upgrade software.............................................................................................. 10-13
10.9 Upgrade firmware ............................................................................................. 10-14
10.10 Replace front panel........................................................................................... 10-15
10.11 Replace module ................................................................................................. 10-23

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B30 BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL ix
10.12 Battery .................................................................................................................10-24
10.12.1 Replace battery for SH/SL power supply .............................................................10-24
10.12.2 Dispose of battery...........................................................................................................10-26
10.13 Uninstall and clear files and data...................................................................10-29
10.14 Repairs .................................................................................................................10-29
10.15 Storage.................................................................................................................10-30
10.16 Disposal ...............................................................................................................10-30
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

xB30 BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
TABLE OF CONTENTS

B30 BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 1-1
B30 Bus Differential 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 alternating current (AC), 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 B30 BUS DIFFERENTIAL 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: [e-mail]
Europe e-mail: multil[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. The service report also can be generated in the field, for example with a USB cable
connected between the graphical front panel and a computer, and the Device Setup configured for the USB connection.
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
B30 BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 1-3
1
Figure 1-1: Generate service report in EnerVista software

1-4 B30 BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
FOR FURTHER ASSISTANCE CHAPTER 1: INTRODUCTION
1

B30 BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 2-1
B30 Bus Differential System
Chapter 2: Product description
Product descript ion
This chapter outlines the product, order codes, and specifications.
2.1 Product description
The B30 Bus Differential System is part of the Universal Relay (UR) series of products. It is a microprocessor-based relay
that provides protection and metering for a busbar with up to six feeders. Protection is provided by a low impedance
percent differential element with features that make it immune to current transformer (CT) saturation. Both biased
(restrained) and unbiased (unrestrained) differential protection functions are provided.
A dynamic busbar replica mechanism is provided by associating the breaker and switch status signals with the differential
zone currents.
The biased bus differential function operates using both the differential and current directional comparison protection
principles. The differential element uses a dual-slope dual-breakpoint characteristic with the restraining current formed as
a maximum of the input currents for better stability during through-fault conditions and faster operation on internal faults.
The current directional comparison principle checks the angular relationship between the currents.
The biased bus differential protection operates in the two-out-of-two mode for low differential currents. This improves
stability during CT saturation conditions caused by comparatively low currents combined with unfavorable phenomena,
such as multiple auto-reclose actions. For high differential currents, the bus differential element operates using the
differential characteristic alone if CT saturation is not detected. Upon CT saturation detection, the relay switches to the
two-out-of-two operating mode for better through fault stability.
The B30 typical operating time is about 12 ms for fast form-C output contacts and internal usage by user-programmable
logic, and about 15 ms for trip-rated form-A output contacts.
A CT failure alarm function that monitors the level of the differential current is provided. A situation when the differential
current stays above a pre-defined level for a pre-defined period of time is declared as a CT trouble event, and an alarm is
raised. To prevent false tripping due to CT trouble, undervoltage supervision or an external check zone can be used.
Voltage and current metering are built into the relay as standard features. Current parameters are available as total
waveform root mean square (RMS) magnitude, or as fundamental frequency only RMS magnitude and angle (phasor).
B30 devices equipped with CT and VT inputs measure power values.
Diagnostic features include an event recorder capable of storing 1024 time-tagged events and oscillography capable of
storing up to 64 records with programmable trigger, content, and sampling rate. The internal clock used for time-tagging
can be synchronized 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

2-2 B30 BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
PRODUCT DESCRIPTION CHAPTER 2: PRODUCT DESCRIPTION
2
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. An RS232 port (USB port with the graphical front panel) 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. 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 (B30 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 B30 uses flash memory technology that allows field upgrading as new features are added. Firmware and software are
upgradable.
The following single-line diagram illustrates the relay functionality using American National Standards Institute (ANSI)
device numbers.
Table 2-1: ANSI device numbers and functions supported
Device
number Function Device number Function
27P Phase undervoltage 50/87 Unrestrained bus differential
49 Thermal overload protection 51G Ground time overcurrent
50BF Breaker failure 51N Neutral time overcurrent
50DD Disturbance detector 51P Phase time overcurrent
50G Ground instantaneous overcurrent 59N Neutral overvoltage
50N Neutral instantaneous overcurrent 59P Phase overvoltage
50P Phase instantaneous overcurrent 59X Auxiliary overvoltage
50/74 CT trouble 67P Phase directional overcurrent
50G Ground instantaneous overcurrent 87B Restrained bus differential

CHAPTER 2: PRODUCT DESCRIPTION PRODUCT DESCRIPTION
B30 BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 2-3
2
Figure 2-1: Single-line diagram
Table 2-2: Other device functions
Function Function Function
Breaker arcing current (I2t) DNP 3.0 or IEC 60870-5-104 protocol Selector switch
Breaker control Ethernet Global Data protocol Setting groups (6)
Breaker flashover Event recorder Time synchronization over SNTP

2-4 B30 BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
SECURITY CHAPTER 2: PRODUCT DESCRIPTION
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 all
users can enter commands and/or change settings.
Two types of connection security are provided: password entry from local or remote connection. Local access is defined as
any access to settings or commands via the front panel interface. This includes both keypad entry and the through a front
panel port. Remote access is defined as any access to settings or commands via any rear communications port. This
includes both Ethernet and RS485 connections. These two settings are on by default and apply to all users.
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 B30, the remote password is used. If the
connection is to a front panel port, the local password applies. (These two local and remote password settings are not
shown the figure.)
Password access events are logged in the Event Recorder.
Breaker restrike FlexElements™ (8) Teleprotection inputs and outputs
Contact inputs (up to 120) FlexLogic equations Time synchronization over IRIG-B or IEEE
1588
Contact outputs (up to 72) IEC 60870-5-103 communications Transducer inputs and outputs
Control pushbuttons IEC 61850 communications User-definable displays
CyberSentry™ security IEC 62351-9 data and communications
security User-programmable fault reports
Data logger Metering: current, voltage, frequency User-programmable LEDs
Demand Modbus communications User-programmable pushbuttons
Digital counters (8) Modbus user map User-programmable self-tests
Digital elements (48) Non-volatile latches Virtual inputs (64)
Direct inputs and outputs (32) Non-volatile selector switch Virtual outputs (96)
Disconnect switches Oscillography
Function Function Function

CHAPTER 2: PRODUCT DESCRIPTION SECURITY
B30 BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 2-5
2
Figure 2-2: Access control by passwords and connection type
2.2.0.3 CyberSentry security
CyberSentry security is available using software options that provide advanced security services. When an 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
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 from common operator functions, or engineering type access, all of
which are defined by separate roles so that access of UR devices by multiple personnel within a substation is allowed.
One role of one type is allowed to be logged in at a time. For example, one Operator can be logged in but not a second
Operator at the same time. This prevents subsets of settings from being changed at the same time.

2-6 B30 BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
SECURITY CHAPTER 2: PRODUCT DESCRIPTION
2
Figure 2-3: CyberSentry user roles
The table lists user roles and their corresponding capabilities.
Table 2-3: Permissions by user role for CyberSentry
Administrator Engineer Operator Supervisor Observer
Summary 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
|--------------- Supervisory See table notes R R See table
notes R
|--------------- Display Properties RW RW R R R
|--------------- Clear Relay Records
(settings) RW RW R R R
|--------------- Communications RW RW R R R
|--------------- Modbus User Map RW RW R R R
|--------------- Real Time Clock RW RW R R R
|--------------- Oscillography RW RW R R R
|--------------- Data Logger RW RW R R R
|--------------- Demand RW RW R R R
|--------------- User-Programmable
LEDs RW RW R R R
|--------------- User-Programmable
Self Tests RW RW R R R
|--------------- Control Pushbuttons RW RW R R R
|--------------- User-Programmable
Pushbuttons RW RW R R R
|--------------- Flex state
Parameters RW RW R R R
|--------------- User-Definable
Displays RW RW R R R
|--------------- Direct I/O RW RW R R R
|--------------- Teleprotection RW RW R R R
|--------------- Installation RW RW R R R
|---------- System Setup RW RW R R R