GE T35 User manual

GE
Grid Solutions
Instruction Manual
Product version: 7.6x
GE publication code: 1601-0114-AF1 (GEK-131007)
T35
Transformer Protection System
1601-0114-AF1
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Copyright © 2017 GE Multilin Inc. All rights reserved.
T35 Transformer Protection System Instruction Manual for version 7.6x.
T35, 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: 1601-0114-AF1 (June 2017)

T35 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL iii
T35 Transformer Protection 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 .................................................................................................................... 2-3
2.3 Order codes............................................................................................................. 2-7
2.3.1 Order codes with enhanced CT/VT modules........................................................... 2-7
2.3.2 Order codes with process bus modules ..................................................................2-10
2.3.3 Replacement modules.....................................................................................................2-13
2.4 Signal processing.................................................................................................2-16
2.4.1 UR signal processing ........................................................................................................2-16
2.5 Specifications........................................................................................................ 2-18
2.5.1 Protection elements..........................................................................................................2-18
2.5.2 User-programmable elements ....................................................................................2-20
2.5.3 Monitoring..............................................................................................................................2-22
2.5.4 Metering..................................................................................................................................2-22
2.5.5 Inputs .......................................................................................................................................2-23
2.5.6 Power supply........................................................................................................................2-24
2.5.7 Outputs....................................................................................................................................2-25
2.5.8 Communication protocols..............................................................................................2-27
2.5.9 Inter-relay communications..........................................................................................2-28
2.5.10 CyberSentry security.........................................................................................................2-30
2.5.11 Graphical front panel........................................................................................................2-30
2.5.12 Environmental......................................................................................................................2-30
2.5.13 Type tests...............................................................................................................................2-31
2.5.14 Production tests..................................................................................................................2-31
2.5.15 Approvals ...............................................................................................................................2-32
2.5.16 Maintenance.........................................................................................................................2-32
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........................................................................................................................... 3-5

iv T35 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
TABLE OF CONTENTS
3.2.3 Rear terminal layout.........................................................................................................3-10
3.3 Wiring .....................................................................................................................3-12
3.3.1 Typical wiring.......................................................................................................................3-12
3.3.2 Dielectric strength .............................................................................................................3-13
3.3.3 Control power......................................................................................................................3-13
3.3.4 CT/VT modules ....................................................................................................................3-14
3.3.5 Process bus modules .......................................................................................................3-16
3.3.6 Contact inputs and outputs ..........................................................................................3-16
3.3.7 Transducer inputs and outputs...................................................................................3-27
3.3.8 RS232 port.............................................................................................................................3-29
3.3.9 CPU communication ports ............................................................................................3-30
3.3.10 IRIG-B.......................................................................................................................................3-32
3.4 Direct input and output communications .......................................................3-33
3.4.1 Description............................................................................................................................3-33
3.4.2 Fiber: LED and ELED transmitters...............................................................................3-36
3.4.3 Fiber laser transmitters...................................................................................................3-36
3.4.4 G.703 interface....................................................................................................................3-37
3.4.5 RS422 interface...................................................................................................................3-41
3.4.6 RS422 and fiber interface ..............................................................................................3-43
3.4.7 G.703 and fiber interface................................................................................................3-44
3.4.8 IEEE C37.94 interface .......................................................................................................3-44
3.4.9 C37.94SM interface...........................................................................................................3-47
3.5 Activate relay ........................................................................................................3-50
3.6 Install software.....................................................................................................3-51
3.6.1 EnerVista communication overview .........................................................................3-51
3.6.2 System requirements.......................................................................................................3-52
3.6.3 Install software....................................................................................................................3-53
3.7 Add device to software........................................................................................3-54
3.7.1 Set IP address in UR..........................................................................................................3-54
3.7.2 Configure serial connection..........................................................................................3-59
3.7.3 Configure Ethernet connection...................................................................................3-60
3.7.4 Configure modem connection.....................................................................................3-62
3.7.5 Automatic discovery of UR devices...........................................................................3-62
3.8 Connect to the T35 ...............................................................................................3-63
3.8.1 Connect to the T35 in EnerVista..................................................................................3-63
3.8.2 Use Quick Connect via the front panel RS232 port............................................3-64
3.8.3 Use Quick Connect via a rear Ethernet port..........................................................3-65
3.9 Set up CyberSentry and change default password........................................3-66
3.10 Import settings .....................................................................................................3-66
3.11 Connect to D400 gateway...................................................................................3-67
3.11.1 Oscillography files..............................................................................................................3-67
3.11.2 Event records.......................................................................................................................3-67
3.11.3 Log files...................................................................................................................................3-67
3.11.4 Setting files............................................................................................................................3-68
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
4.1.9 Settings file traceability...................................................................................................4-12

TABLE OF CONTENTS
T35 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL v
4.2 Front panel interface........................................................................................... 4-14
4.2.1 Front panel ............................................................................................................................4-14
4.2.2 Front panel display............................................................................................................4-17
4.2.3 Front panel navigation keys..........................................................................................4-38
4.2.4 LED indicators ......................................................................................................................4-40
4.2.5 Front panel labelling .........................................................................................................4-44
4.2.6 Menu navigation.................................................................................................................4-51
4.2.7 Change settings ..................................................................................................................4-53
4.2.8 View actual values.............................................................................................................4-58
4.2.9 Breaker control....................................................................................................................4-59
4.2.10 Change passwords............................................................................................................4-60
4.2.11 Invalid password entry ....................................................................................................4-62
4.3 Logic diagrams..................................................................................................... 4-62
4.4 FlexLogic design using Engineer .......................................................................4-63
4.4.1 Design logic...........................................................................................................................4-65
4.4.2 Send file to and from device .........................................................................................4-75
4.4.3 Monitor logic.........................................................................................................................4-76
4.4.4 View front panel and print labels................................................................................4-77
4.4.5 Generate connectivity report........................................................................................4-78
4.4.6 Preferences ...........................................................................................................................4-78
4.4.7 Toolbars ..................................................................................................................................4-82
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.............................................................................5-113
5.3.9 Oscillography.....................................................................................................................5-114
5.3.10 Data logger ........................................................................................................................5-117
5.3.11 User-programmable LEDs ..........................................................................................5-118
5.3.12 User-programmable self-tests .................................................................................5-122
5.3.13 Control pushbuttons......................................................................................................5-123
5.3.14 User-programmable pushbuttons..........................................................................5-124
5.3.15 Flex state parameters...................................................................................................5-130
5.3.16 User-definable displays................................................................................................5-131
5.3.17 Direct inputs and outputs............................................................................................5-133
5.3.18 Teleprotection...................................................................................................................5-139
5.3.19 Installation..........................................................................................................................5-140
5.4 Remote resources..............................................................................................5-140
5.4.1 Remote resources configuration .............................................................................5-140
5.5 System setup.......................................................................................................5-142
5.5.1 AC inputs .............................................................................................................................5-142
5.5.2 Power system....................................................................................................................5-143
5.5.3 Signal sources...................................................................................................................5-144
5.5.4 Transformer .......................................................................................................................5-147
5.5.5 Breakers...............................................................................................................................5-159
5.5.6 Disconnect switch control...........................................................................................5-164

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5.5.7 FlexCurves.......................................................................................................................... 5-169
5.6 FlexLogic.............................................................................................................. 5-176
5.6.1 FlexLogic operands........................................................................................................ 5-176
5.6.2 FlexLogic rules.................................................................................................................. 5-187
5.6.3 FlexLogic evaluation...................................................................................................... 5-187
5.6.4 FlexLogic example..........................................................................................................5-187
5.6.5 FlexLogic equation editor............................................................................................ 5-192
5.6.6 FlexLogic timers............................................................................................................... 5-192
5.6.7 FlexElements ..................................................................................................................... 5-192
5.6.8 Non-volatile latches.......................................................................................................5-197
5.7 Grouped elements............................................................................................. 5-198
5.7.1 Overview ............................................................................................................................. 5-198
5.7.2 Setting group 1................................................................................................................. 5-198
5.7.3 Transformer elements .................................................................................................. 5-199
5.7.4 Phase current ................................................................................................................... 5-208
5.7.5 Ground current ................................................................................................................ 5-216
5.8 Control elements ............................................................................................... 5-223
5.8.1 Overview ............................................................................................................................. 5-223
5.8.2 Trip bus ................................................................................................................................ 5-223
5.8.3 Setting groups .................................................................................................................. 5-225
5.8.4 Selector switch................................................................................................................. 5-226
5.8.5 Digital elements............................................................................................................... 5-233
5.8.6 Underfrequency (ANSI 81U)........................................................................................ 5-236
5.8.7 Digital counters................................................................................................................ 5-237
5.8.8 Monitoring elements ..................................................................................................... 5-239
5.9 Inputs/outputs ................................................................................................... 5-247
5.9.1 Contact inputs.................................................................................................................. 5-247
5.9.2 Virtual inputs..................................................................................................................... 5-249
5.9.3 Contact outputs............................................................................................................... 5-250
5.9.4 Virtual outputs.................................................................................................................. 5-254
5.9.5 Resetting ............................................................................................................................. 5-254
5.9.6 Direct inputs and outputs ........................................................................................... 5-255
5.9.7 Teleprotection................................................................................................................... 5-259
5.10 Transducer inputs/outputs.............................................................................. 5-261
5.10.1 DCmA inputs...................................................................................................................... 5-261
5.10.2 RTD inputs .......................................................................................................................... 5-262
5.10.3 DCmA outputs .................................................................................................................. 5-263
5.11 Testing................................................................................................................. 5-267
5.11.1 Test mode function ........................................................................................................5-267
5.11.2 Test mode forcing........................................................................................................... 5-267
5.11.3 Force contact inputs ..................................................................................................... 5-268
5.11.4 Force contact outputs .................................................................................................. 5-268
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
6.3.9 RxGOOSE statistics...............................................................................................................6-6

TABLE OF CONTENTS
T35 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL vii
6.3.10 Digital counters ..................................................................................................................... 6-6
6.3.11 Selector switches.................................................................................................................. 6-7
6.3.12 Flex States................................................................................................................................ 6-7
6.3.13 Ethernet .................................................................................................................................... 6-7
6.3.14 Real time clock synchronizing........................................................................................ 6-7
6.3.15 Direct inputs............................................................................................................................ 6-8
6.3.16 Direct devices status .......................................................................................................... 6-9
6.3.17 EGD protocol status ............................................................................................................ 6-9
6.3.18 Teleprotection channel tests ........................................................................................6-10
6.3.19 Remaining connection status.......................................................................................6-10
6.3.20 Parallel Redundancy Protocol (PRP)...........................................................................6-11
6.3.21 TxGOOSE status ..................................................................................................................6-11
6.4 Metering................................................................................................................. 6-12
6.4.1 Metering conventions.......................................................................................................6-12
6.4.2 Transformer ..........................................................................................................................6-16
6.4.3 Sources....................................................................................................................................6-17
6.4.4 Tracking frequency............................................................................................................6-20
6.4.5 FlexElements.........................................................................................................................6-20
6.4.6 RxGOOSE analogs ..............................................................................................................6-21
6.4.7 Restricted ground fault....................................................................................................6-21
6.4.8 Transducer inputs/outputs............................................................................................6-22
6.5 Records ..................................................................................................................6-22
6.5.1 User-programmable fault reports..............................................................................6-22
6.5.2 Event records .......................................................................................................................6-22
6.5.3 Oscillography........................................................................................................................6-24
6.5.4 Data logger ...........................................................................................................................6-24
6.5.5 Breaker maintenance.......................................................................................................6-25
6.6 Product information ............................................................................................ 6-25
6.6.1 Model information..............................................................................................................6-25
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 COMMISSIONING 8.1 Differential characteristic test ............................................................................ 8-1
8.1.1 Description .............................................................................................................................. 8-1
8.2 Differential characteristic test examples.......................................................... 8-3
8.2.1 Overview................................................................................................................................... 8-3
8.2.2 Test example 1 ...................................................................................................................... 8-4
8.2.3 Test example 2 ...................................................................................................................... 8-9
8.2.4 Test example 3 ....................................................................................................................8-10
8.2.5 Test example 4 ....................................................................................................................8-11
8.3 Inrush inhibit test................................................................................................. 8-13
8.3.1 Inrush inhibit test procedure.........................................................................................8-13
8.4 Overexcitation inhibit test.................................................................................. 8-14
8.4.1 Overexcitation inhibit test procedure.......................................................................8-14
8.5 Blank test tables................................................................................................... 8-14

viii T35 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
TABLE OF CONTENTS
8.5.1 Differential restraint tests .............................................................................................. 8-14
8.5.2 Inrush inhibit tests .............................................................................................................8-15
8.5.3 Overexcitation inhibit tests............................................................................................8-16
9 THEORY OF
OPERATION
9.1 Directional principle...............................................................................................9-1
9.1.1 Current directional protection ........................................................................................9-1
9.2 Saturation detector................................................................................................9-2
9.2.1 CT saturation detection......................................................................................................9-2
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 ............................................................................................. 10-13
10.10 Replace front panel........................................................................................... 10-15
10.11 Replace module ................................................................................................. 10-23
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 Clear files and data after uninstall ................................................................ 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

TABLE OF CONTENTS
T35 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL ix
ABBREVIATIONS
INDEX

x T35 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
TABLE OF CONTENTS

T35 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL 1-1
T35 Transformer Protection 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 T35 TRANSFORMER PROTECTION 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. When using the optional graphical front panel, the report instead can be generated by
connecting a USB drive to the front panel.
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
T35 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL 1-3
1
Figure 1-1: Generate service report in EnerVista software

1-4 T35 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
FOR FURTHER ASSISTANCE CHAPTER 1: INTRODUCTION
1

T35 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL 2-1
T35 Transformer Protection System
Chapter 2: Product description
Product descript ion
This chapter outlines the product, order codes, and specifications.
2.1 Product description
The T35 Transformer Protection System is part of the Universal Relay (UR) series of products. It is a microprocessor-based
relay for protecting small, medium, and large three-phase power transformers involved in complicated power system
configurations. The relay is available with two to six banks of three-phase inputs: either CTs or CTs and VTs.
Typical T35 applications include:
• Transformers with windings connected between two or more breakers
• Transformers with windings without associated breakers, where the only available ones are those on buses, lines, or
feeders
The percent and instantaneous differential elements are the primary protection elements. The backup protection
elements, such as instantaneous overcurrent, can be expressed in fully configurable FlexElements™. The relay can also be
configured to protect transformers with any phase shift between the windings and handle up to 32 times the ratio
mismatch.
Voltage, current, and power 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).
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, as well as data logger acquisition of up to
16 channels, with programmable 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 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 of 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 Ethernet interface
provides fast, reliable communications in noisy environments. The Ethernet port supports IEC 61850, Modbus/TCP, TFTP,

2-2 T35 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
PRODUCT DESCRIPTION CHAPTER 2: PRODUCT DESCRIPTION
2
and PTP (according to IEEE Std. 1588-2008 or IEC 61588), and it allows access to the relay via any standard web browser
(T35 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 T35 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
Figure 2-1: Single-line diagram
Device
number Function
49 Thermal Overload Protection
50/87 Instantaneous Differential Overcurrent
50G Ground Instantaneous Overcurrent
50P Phase Instantaneous Overcurrent
51G Ground Time Overcurrent
51P Phase Time Overcurrent
81U Underfrequency
87RGF Restricted Ground Fault
87T Transformer Differential

CHAPTER 2: PRODUCT DESCRIPTION SECURITY
T35 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL 2-3
2
Table 2-2: Other device functions
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 T35 supports password entry from a 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 the front panel 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 T35, the remote password must be used. If the
connection is to the RS232 port of the front panel, the local password applies.
Function Function Function
Breaker Arcing Current I2t Event Recorder Time Synchronization over SNTP
Breaker Control FlexElements (16) Transducer Inputs/Outputs
Contact Inputs (up to 120) FlexLogic Equations Transformer Aging Factor
Contact Outputs (up to 72) IEC 60870-5-103 Communications Transformer Hottest-Spot Temperature
Control Pushbuttons IEC 61850 Communications Transformer Loss-of-Life
CT Failure Detector IEC 62351-9 Data and Communications
Security Trip Bus
CyberSentry™ Security Metering: Current, Voltage, Power, Power
Factor, Frequency User Definable Displays
Data Logger Modbus Communications User-Programmable Fault Reports
Digital Counters (8) Modbus User Map User Programmable LEDs
Digital Elements (48) Non-Volatile Latches User Programmable Pushbuttons
Direct Inputs/Outputs (32) Non-Volatile Selector Switch User Programmable Self-Tests
Disconnect Switches Oscillography Virtual Inputs (64)
DNP 3.0 or IEC 60870-5-104 Protocol Setting Groups (6) Virtual Outputs (96)
Ethernet Global Data Protocol Time synchronization over IRIG-B or IEEE
1588

2-4 T35 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
SECURITY CHAPTER 2: PRODUCT DESCRIPTION
2
Password access events are logged in the Event Recorder.
2.2.0.3 CyberSentry security
CyberSentry embedded 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
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.
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.
Figure 2-2: 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

CHAPTER 2: PRODUCT DESCRIPTION SECURITY
T35 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL 2-5
2
|---------- 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
|---------- FlexLogic RW RW R R R
|---------- Grouped Elements RW RW R R R
|---------- Control Elements RW RW R R R
|---------- Inputs / Outputs RW RW R R R
|--------------- Contact Inputs RW RW R R R
|--------------- Contact Input
threshold RW RW R R R
|--------------- Virtual Inputs RW RW R R R
|--------------- Contact Outputs RW RW R R R
|--------------- Virtual Outputs RW RW R R R
|--------------- Resetting RW RW R R R
|--------------- Direct Inputs RW RW R R R
|--------------- Direct Outputs RW RW R R R
|--------------- Teleprotection RW RW R R R
|--------------- Direct Analogs RW RW R R R
|--------------- Direct Integers RW RW R R R
|---------- Transducer I/O RW RW R R R
|---------- Testing RW RW R R R
|---------- Front Panel Labels Designer NA NA NA NA NA
|---------- Protection Summary NA NA NA NA NA
Roles Administrator Engineer Operator Supervisor Observer

2-6 T35 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
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Table Notes:
RW = read and write access
R = read access
Supervisor = RW (default), Administrator = R (default), Administrator = RW (only if Supervisor role is disabled)
NA = the permission is not enforced by CyberSentry security
CyberSentry user authentication
The following types of authentication are supported by CyberSentry to access the UR device:
• Device Authentication (local UR device authenticates)
• Server Authentication (RADIUS server authenticates)
The EnerVista software allows access to functionality that is determined by the user role, which comes either from the local
UR device or the RADIUS server.
The EnerVista software has a device authentication option on the login screen for accessing the UR device. When the
"Device" button is selected, the UR uses its local authentication database and not the RADIUS server to authenticate the
user. In this case, it uses its built-in roles (Administrator, Engineer, Supervisor, Observer, Operator, or Administrator and
Supervisor when Device Authentication is disabled) as login names and the associated passwords are stored on the UR
device. As such, when using the local accounts, access is not user-attributable.
In cases where user-attributable access is required especially to facilitate auditable processes for compliance reasons, use
RADIUS authentication only.
When the "Server" Authentication Type option is selected, the UR uses the RADIUS server and not its local authentication
database to authenticate the user.
No password or security information is displayed in plain text by the EnerVista software or UR device, nor is such
information ever transmitted without cryptographic protection.
CyberSentry server authentication
The UR has been designed to direct automatically the authentication requests based on user names. In this respect, local
account names on the UR are considered as reserved and not used on a RADIUS server.
Commands RW RW RW R R
|---------- Virtual Inputs RW RW RW R R
|---------- Clear Records RW RW RW R R
|---------- Set Date and Time RW RW RW R R
User Displays R R R R R
Targets R R R R R
Actual Values R R R R R
|---------- Front panel labels designer R R R R R
|---------- Status R R R R R
|---------- Metering R R R R R
|---------- Transducer I/O R R R R R
|---------- Records R R R R R
|---------- Product Info R R R R R
Maintenance RW RW R R R
|---------- Modbus Analyzer NA NA NA NA NA
|---------- Change front panel RW RW RW R R
|---------- Update firmware Yes No No No No
|---------- Retrieve file Yes No No No No
Roles Administrator Engineer Operator Supervisor Observer