Siemens Reyrolle 7SR46 User manual

Reyrolle
7SR46 Device
V1.00
Manual
C53000-G7040-C103-1
Preface
Open Source Software
Table of Contents
Introduction 1
Device Functionality 2
Functions 3
Technical Data 4
Applications 5
Index

i
i
NOTE
For your own safety, observe the warnings and safety instructions contained in this document, if available.
Disclaimer of Liability
Subject to changes and errors. The information given in
this document only contains general descriptions and/or
performance features which may not always specifically
reflect those described, or which may undergo modifica-
tion in the course of further development of the products.
The requested performance features are binding only when
they are expressly agreed upon in the concluded contract.
Document version: C53000-G7040-C103-1.0
Edition: 10.2022
Version of the product described: V1.00
Copyright
Copyright © Siemens 2022. All rights reserved.
The disclosure, duplication, distribution and editing of this
document, or utilization and communication of the content
are not permitted, unless authorized in writing. All rights,
including rights created by patent grant or registration of a
utility model or a design, are reserved.

Preface
Purpose of the Manual
This manual provides an overview of the Reyrolle device family. It describes various functions (protection and
supervision) used, device technical data, and device applications.
Target Audience
This manual is mainly intended for protection system engineers, commissioning engineers, persons entrusted
with the setting, testing and maintenance of automation, selective protection and control equipment, and
operational crew in electrical installations and power plants.
Scope
This manual applies to the Reyrolle device family.
Further Documentation
[dw_reyrolle-catalog_furtherdocumentation_devicemanual, 1, en_US]
•Device manual
The device manual describes the functions and applications of the Reyrolle device. The printed manual
for the device has the same informational structure.
•Hardware manual
The hardware manual describes the hardware building blocks and device combinations of the Reyrolle
device family.
•Operating manual
The operating manual describes the basic principles and procedures for operating and installing the
devices of the Reyrolle device family.
Reyrolle, 7SR46 Device, Manual 3
C53000-G7040-C103-1, Edition 10.2022

•Communication protocol manual
The communication protocol manual contains a description of the protocols for communication within
the Reyrolle device family and to higher-level network control centers.
•Product information
The product information includes general information about device installation, technical data, limiting
values for input and output modules, and conditions when preparing for operation. This document is
provided with each Reyrolle device.
•Engineering Guide
The engineering guide describes the essential steps when engineering with Reydisp Evolution. In addi-
tion, the engineering guide shows you how to load a planned configuration to a Reyrolle device and
update the functionality of the Reyrolle device.
•Reyrolle catalog
The Reyrolle catalog describes the system features and the devices of Reyrolle.
•Easy Protection Relay Selector for Reyrolle and SIPROTEC
This tool gives a quick guidance to find a protection relay of SIPROTEC 5, SIPROTEC 4, SIPROTEC Compact,
Reyrolle which would fit your needs.
Indication of Conformity
This product complies with the directive of the Council of the European Communities
on the harmonization of the laws of the Member States relating to electromagnetic
compatibility (EMC Directive 2014/30/EU) and concerning electrical equipment for use
within specified voltage limits (Low Voltage Directive 2014/35/EU) as well as restriction
on usage of hazardous substances in electrical and electronic equipment (RoHS Direc-
tive 2011/65/EU).
This conformity has been proved by tests conducted by Siemens AG in accordance of
the Council Directive in accordance with the product standard IEC/EN 60255-26 for the
EMC directives, and with the standard IEC/EN 60255-27 for the low-voltage directive.
RoHS directive 2011/65/EU is met using the standard IEC/EN 63000.
The device has been designed and produced for industrial use.
Additional Support
For questions about the system, contact your Siemens sales partner.
Customer Support Center
Our Customer Support Center provides a 24-hour service.
Siemens AG
Smart Infrastructure – Protection Automation Tel.: [phone]
Customer Support Center E-Mail: [email protected]
Training Courses
Inquiries regarding individual training courses should be addressed to our Training Center:
Siemens AG
Siemens Power Academy TD Phone: [phone]
Humboldtstraße 59 E-mail: [email protected]
90459 Nuremberg Internet: www.siemens.com/poweracademy
Germany
Notes on Safety
This document is not a complete index of all safety measures required for operation of the equipment (module
or device). However, it comprises important information that must be followed for personal safety, as well as
Preface
4 Reyrolle, 7SR46 Device, Manual
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to avoid material damage. Information is highlighted and illustrated as follows according to the degree of
danger:
!
DANGER
DANGER means that death or severe injury will result if the measures specified are not taken.
²Comply with all instructions, in order to avoid death or severe injuries.
!
WARNING
WARNING means that death or severe injury may result if the measures specified are not taken.
²Comply with all instructions, in order to avoid death or severe injuries.
!
CAUTION
CAUTION means that medium-severe or slight injuries can occur if the specified measures are not taken.
²Comply with all instructions, in order to avoid moderate or minor injuries.
NOTICE
NOTICE means that property damage can result if the measures specified are not taken.
²Comply with all instructions, in order to avoid property damage.
i
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NOTE
Important information about the product, product handling or a certain section of the documentation
which must be given attention.
Qualified Electrical Engineering Personnel
Only qualified electrical engineering personnel may commission and operate the equipment (module, device)
described in this document. Qualified electrical engineering personnel in the sense of this document are
people who can demonstrate technical qualifications as electrical technicians. These persons may commission,
isolate, ground and label devices, systems and circuits according to the standards of safety engineering.
Proper Use
The equipment (device, module) may be used only for such applications as set out in the catalogs and the
technical description, and only in combination with third-party equipment recommended and approved by
Siemens.
Problem-free and safe operation of the product depends on the following:
•Proper transport
•Proper storage, setup and installation
•Proper operation and maintenance
Preface
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When electrical equipment is operated, hazardous voltages are inevitably present in certain parts. If proper
action is not taken, death, severe injury or property damage can result:
•The equipment must be grounded at the grounding terminal before any connections are made.
•All circuit components connected to the power supply may be subject to dangerous voltage.
•Hazardous voltages may be present in equipment even after the supply voltage has been disconnected
(capacitors can still be charged).
•Operation of equipment with exposed current-transformer circuits is prohibited. Before disconnecting the
equipment, ensure that the current-transformer circuits are short-circuited.
•The limiting values stated in the document must not be exceeded. This must also be considered during
testing and commissioning.
Selection of Used Symbols on the Device
No. Symbol Description
1 Direct current, IEC 60417, 5031
2 Alternating current, IEC 60417, 5032
3 Direct and alternating current, IEC 60417, 5033
4 Earth (ground) terminal, IEC 60417, 5017
5 Protective conductor terminal, IEC 60417, 5019
6 Caution, risk of electric shock
7 Caution, risk of danger, ISO 7000, 0434
8 Protective insulation, IEC 60417, 5172, safety class II devices
9 Guideline 2002/96/EC for electrical and electronic devices
10 United Kingdom (UK) conformity-assessed marking
OpenSSL
This product includes software developed by the OpenSSL Project for use in OpenSSL Toolkit (http://
www.openssl.org/).
This product includes software written by Tim Hudson ([email protected]).
This product includes cryptographic software written by Eric Young ([email protected]).
Preface
6 Reyrolle, 7SR46 Device, Manual
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Open Source Software
The product contains, among other things, Open Source Software developed by third parties. The Open
Source Software used in the product and the license agreements concerning this software can be found in the
Readme_OSS. These Open Source Software files are protected by copyright. Your compliance with those
license conditions will entitle you to use the Open Source Software as foreseen in the relevant license. In the
event of conflicts between Siemens license conditions and the Open Source Software license conditions, the
Open Source Software conditions shall prevail with respect to the Open Source Software portions of the soft-
ware. The Open Source Software is licensed royalty-free. Insofar as the applicable Open Source Software
License Conditions provide for it you can order the source code of the Open Source Software from your
Siemens sales contact – against payment of the shipping and handling charges – for a period of at least
3 years after purchase of the product. We are liable for the product including the Open Source Software
contained in it pursuant to the license conditions applicable to the product. Any liability for the Open Source
Software beyond the program flow intended for the product is explicitly excluded. Furthermore, any liability
for defects resulting from modifications to the Open Source Software by you or third parties is excluded. We
do not provide any technical support for the product if it has been modified.
The ReadmeOSS documents for the product can be found here: www.siemens.com/reyrolle
Reyrolle, 7SR46 Device, Manual 7
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Table of Contents
Preface..........................................................................................................................................................3
Open Source Software..................................................................................................................................7
1 Introduction................................................................................................................................................11
1.1 7SR46 Overcurrent and Earth Fault Relay Overview............................................................12
1.2 Ordering Options.............................................................................................................. 14
2 Device Functionality................................................................................................................................... 15
2.1 Front Fascia...................................................................................................................... 16
2.1.1 Overview.....................................................................................................................16
2.1.2 Liquid Crystal Display................................................................................................... 16
2.1.3 Keypad........................................................................................................................17
2.1.4 Light Emitting Diode (LED)...........................................................................................18
2.1.5 Local Flag.................................................................................................................... 20
2.1.6 Rating Label................................................................................................................ 20
2.2 Sensitivity ........................................................................................................................ 21
2.3 Binary Inputs ....................................................................................................................22
2.4 External Trip Input............................................................................................................ 24
2.5 Binary Outputs ................................................................................................................. 26
2.6 Pulse Output .................................................................................................................... 28
2.7 Remote Flag Output ......................................................................................................... 29
2.8 Resetting of LEDs, Trip Flag Indication, and Binary Outputs................................................ 30
2.9 Data Storage..................................................................................................................... 33
2.10 Real Time Clock (RTC)........................................................................................................34
3 Functions.................................................................................................................................................... 35
3.1 Functions Available in 7SR46 Argus Relay.......................................................................... 36
3.2 50 Instantaneous Overcurrent - Phase .............................................................................. 37
3.3 50N Instantaneous Earth Fault – Derived...........................................................................41
3.4 51 Time-Delayed Overcurrent – Phase............................................................................... 44
3.5 51N Time-Delayed Earth Fault – Derived............................................................................50
3.6 50LC/SOTF Switch onto Fault Protection............................................................................ 55
3.7 2nd Harmonic Block/Inrush Restraint (81HBL2).................................................................. 58
4 Technical Data............................................................................................................................................ 61
4.1 General Device Data..........................................................................................................62
4.2 50 Instantaneous Overcurrent - Phase............................................................................... 63
4.3 50N Instantaneous Earth Fault – Derived...........................................................................64
4.4 51 Time-Delayed Overcurrent - Phase................................................................................ 65
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4.5 51N Time-Delayed Earth Fault – Derived............................................................................66
4.6 50LC/SOTF Switch onto Fault............................................................................................ 67
4.7 81HBL2 2nd Harmonic Block/Inrush Restraint......................................................................68
5 Applications................................................................................................................................................69
5.1 Overview ......................................................................................................................... 70
5.2 Specific CTs.......................................................................................................................71
5.2.1 Overview.....................................................................................................................71
5.3 Time-Delayed Overcurrent (51/51N) ................................................................................. 74
5.4 Overcurrent Characteristics............................................................................................... 76
5.4.1 Selection of Overcurrent Characteristics ...................................................................... 76
5.4.2 Reset Delay .................................................................................................................76
5.5 Instantaneous Overcurrent (50/50N) ................................................................................ 77
5.6 Inrush Detector (81HBL2) .................................................................................................78
5.7 Connection Examples........................................................................................................79
5.7.1 Connection Examples for RMU Application................................................................... 79
5.7.2 Connection Examples for Distribution Transformer Application.....................................80
Index...........................................................................................................................................................83
Table of Contents
10 Reyrolle, 7SR46 Device, Manual
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Introduction
1.1 7SR46 Overcurrent and Earth Fault Relay Overview 12
1.2 Ordering Options 14
1
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7SR46 Overcurrent and Earth Fault Relay Overview
The 7SR46 Argus dual powered non-directional overcurrent and earth fault relay is a member of the Siemens
Reyrolle protection devices product family. The relay is developed using the latest generation of hardware
technology.
[sc_7SR46_mainImage, 1, --_--]
Figure 1-1 7SR46 Overcurrent and Earth Fault Relay
i
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NOTE
In this Manual, the 7SR46 Argus dual powered non-directional overcurrent and earth fault relay will be
referred as 7SR46 Argus relay.
Device Functionality Overview
The 7SR46 Argus relay includes protection and supervision functions. The relay provides both definite-time
and inverse-time overcurrent and earth fault protection functions. The relay is CT powered with an option for
connection to an external auxiliary power supply.
The relay can be configured via a front USB port for local PC connection or rear electrical RS485 port for
remote connection. By using the Reydisp Evolution software, you can update the settings and view the fault
records (trip log) and the event records (event log).
The relay supports the IEC 60870-5-103 and Modbus RTU communication protocols which help in establishing
connection to SCADA. The relay can indicate the trip with local and remote flag indicator.
Main function Overcurrent and earth-fault protection
Inputs and outputs •3 current transformers compatible with 6 types of specific CTs (class 5P80)
•2 binary inputs
•2 binary outputs
•1 external trip input
•1 pulse output
•1 local flag and 1 remote flag indicator
Auxiliary voltage AC 60 V to 240 V/DC 24 V to 240 V
Communication Front USB port (for configuration via Reydisp Evolution) and rear RS485 port
Housing Non-draw-out polycarbonate case with side mounting arrangement
1.1
Introduction
1.1 7SR46 Overcurrent and Earth Fault Relay Overview
12 Reyrolle, 7SR46 Device, Manual
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Protection Functions
•50 Instantaneous overcurrent – phase
•50LC/SOTF Line check/Switch onto fault
•50N Instantaneous earth fault – derived
•51 Time-delayed overcurrent – phase
•51N Time-delayed earth fault – derived
Supervision Functions
•81HBL2 Inrush-current detection
Modular Concept
•Modular system design in hardware, software, and communication
•Functional integration of various applications, such as protection, control, and fault recorder
•Consistent functionality across the entire family of devices
•Upgrade path using software libraries and updates
•Flexible hardware architecture
•Self-monitoring routines for device faults
General Properties
•CT powered with option for an external auxiliary supply connection
•Dedicated switch-on-to-fault (SOTF) protection
•Self-monitoring – Including battery condition monitor
•High sensitivity – Relay healthy at 0.8 ⋅ Ismin (1-phase) and 0.4 ⋅ Ismin (3-phase)
•Intelligent power management – Fail-safe startup and shut down modes
•Removable lithium battery backup for viewing fault data, setting the protection, and resetting of indica-
tions
•Compatible with 6 types of specific CTs (class 5P80) - giving wide range of operation
•Suitable for RMU mounting
•Front fascia with 2 non-programmable LEDs and 2 user programmable LEDs
•1 Mechanical flag for trip indication
•1 External trip input
Communication Protocols Supported
•IEC 60870-5-103
•Modbus RTU
Introduction
1.1 7SR46 Overcurrent and Earth Fault Relay Overview
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Ordering Options
Ordering Information – 7SR46 Argus
Product Description Order Number
1 2 3 4 5 6 7 – 8 9 10 11 12 – 13 14 15 16
Dual Powered Non-Directional Overcur-
rent and Earth Fault Relay with Specific CT
7 S R 4 6 0 □ – □ □ □ □ 0 – 1 A □ 0
| |||| ||
Case I/O and Fascia | | | | | | |
Height 104 mm, molded case, 3 CT, 2 binary inputs, 2 binary outputs,
1 pulse output, 4 LEDs, 1 flag output, and 1 external trip input
5 |||| ||
|||| ||
Measuring input | | | | | |
Specific CT 3 | | | | |
||| ||
Auxiliary Voltage | | | | |
Dual powered (CT powered + Aux. powered: DC 24 V to DC 240 V/AC 60 V to
AC 240 V, Binary input threshold: DC 19 V)
H | | |
Dual powered (CT powered + Aux. powered: DC 24 V to DC 240 V/AC 60 V to
AC 240 V, Binary input threshold: AC 88 V/DC 88 V)
J | | |
| | | |
Front Fascia | | | |
Standard version – with trip flag indicator B | | |
| | |
Communication Options | | |
Front port: USB and rear port: RS485 supporting IEC 60870-5-103 and Modbus RTU (user-
selectable setting)
2 | |
| |
Protection and Supervision Functions - Standard Version A |
50 Instantaneous overcurrent – phase |
50LC Line check/Switch onto fault – phase |
50N Instantaneous earth fault – derived |
51 Time-delayed overcurrent – phase |
51N Time-delayed earth fault – derived |
81HBL2 inrush current detector |
|
Conformal Coating |
Standard version – No conformal coating on PCBA A
1.2
Introduction
1.2 Ordering Options
14 Reyrolle, 7SR46 Device, Manual
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Device Functionality
2.1 Front Fascia 16
2.2 Sensitivity 21
2.3 Binary Inputs 22
2.4 External Trip Input 24
2.5 Binary Outputs 26
2.6 Pulse Output 28
2.7 Remote Flag Output 29
2.8 Resetting of LEDs, Trip Flag Indication, and Binary Outputs 30
2.9 Data Storage 33
2.10 Real Time Clock (RTC) 34
2
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Front Fascia
Overview
The front fascia is part of the relay that is designed to provide a user-friendly method of entering the settings
and retrieving data from the relay. You can access through the push-buttons and perform the setting changes.
The front fascia contains 2 predefined LED indicators and a paper label for 2 user-programmable LEDs. By
using the ▶ key, the fascia provides the following options:
•Read and acknowledge the fault log
•Acknowledge and reset the LED and local flag indications
•Test and operate the binary outputs
•Reset the latched binary outputs
[dw_7SR46 user interface, 1, en_US]
Figure 2-1 Front Fascia
Liquid Crystal Display
A 2 line by 16 character alphanumeric liquid crystal display provides information of settings mode, instrument
mode, and fault data mode.
[sc_pressEnter_lcd, 1, en_US]
Figure 2-2 7SR46 Relay LCD
2.1
2.1.1
2.1.2
Device Functionality
2.1 Front Fascia
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By using the LCD, you can view or edit a configuration parameter and view the following:
•Real-time state of a relay such as BI, ETI, and BO
•Battery profile
•Auxiliary power status
•Primary current and nominal current values of each phase and earth
•General alarms
The LCD displays the stored fault information to the operator. When any fault condition occurs, the relay
displays the latest fault information on the LCD.
General alarms are user-defined text messages displayed on the LCD when mapped to binary inputs or
external trip input. Up to 3 general alarms can be programmed, each triggered from 1 or more inputs. Each
general alarm also generates an event.
If the 7SR46 Argus relay is powered with phase CT input and the current is more than 1.6 ⋅ Ismin (3-phase),
then backlight turns on automatically. If the 7SR46 Argus relay is de-energized than the defined limits, then
the backlight does not turn on.
If the 7SR46 Argus relay is powered on by inserting a USB cable, then backlight turns on automatically. The
backlight can be turned off manually by pressing the backlight key. If you do not perform any activity in the
device HMI for more than 30 s, then the backlight turns off automatically to save energy.
In the phase CT power mode, the 7SR46 Argus relay periodically monitors whether sufficient current is avail-
able to turn on the backlight.
In the USB or battery power mode, if the backlight is already turned on and if the phase CT input is provided,
then the backlight turns off due to the switching of the power mode from USB or battery to CT power. If suffi-
cient current is available, then the backlight can be turned on again.
For more information about the power source, refer to the chapter Modes of Operation in 7SR46 Operating
Manual.
Keypad
The 7SR46 Argus relay consists of 5 standard keys for navigation and for editing the values. The standard keys
are used to navigate the menu structure and configure the relay functions.
2 more keys are available for LCD backlight and battery mode.
The standard keys are used for the following functions:
•To display and edit the relay settings
•To display the relay instrumentation and fault data
•To reset the relays output and LEDs
Keys Description
This push-button is used to navigate the menu structure or to increase the
parameter value in the edit mode.
This push-button is used to navigate the menu structure or to decrease the
parameter value in the edit mode.
This push-button is used to reset the fault indication on the fascia. This TEST/
RESET push-button is also used for selecting the menu or selecting parameter
values in the edit mode. By using this push-button, you can acknowledge/
reset the LEDs, binary output, and trip flag indication.
This push-button is used for selecting the parameter or confirming the values.
The ENTER push-button is used to initiate and accept the setting changes.
Press ENTER to edit the parameter setting. The setting value flashes and can
be changed by using the ▲ or ▼ keys.
2.1.3
Device Functionality
2.1 Front Fascia
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Keys Description
This push-button is used to return the relay display to its initial status or one
level up in the menu structure. Press CANCEL to return to the previous menu
or to cancel the value.
This push-button is used to reject any alterations to a setting while in the edit
mode.
Press the CANCEL key repeatedly to return to the Relay Identifier screen.
This push-button is used to power on and power off the relay with battery
power when the auxiliary power, CT power, and USB power are not available.
This push-button is used to turn on and turn off the backlight.
Light Emitting Diode (LED)
Indication LEDs
The 7SR46 Argus relay provides 2 non-programmable LEDs and 2 user-programmable LEDs.
The LED functions are:
Table 2-1 LED Functions
LEDs Parameters Indication Color Functions
LED 1 HEALTHY Green Indicates the relay protection function in a
healthy state
LED 2 O/C1Red LEDs L2 to L3 are user-programmable LEDs. They
indicate when the respective mapped function is
triggered.
By default, these LEDs are mapped to O/C (phase
overcurrent) and E/F (earth fault) functions.
LED 3 E/F1Red
LED 4 LOW BATTERY Amber (continuous) Indicates when the battery voltage is less than
the operating level
Amber (blinks) Critical battery condition
Healthy LED
The steady illumination of Protection HEALTHY LED indicates that the required CT current 0.8 ⋅ Ismin (1-phase)
or 0.4 ⋅ Ismin (3-phase) or auxiliary power supply is applied to the relay, which indicates a healthy relay.
Low Battery LED
The low battery LED indicates when the battery voltage falls below the operating voltage.
User-Programmable LEDs
The 7SR46 Argus relay consists of 2 user-programmable LEDs which can be configured to protection functions
and miscellaneous functions. The LEDs (L2, L3) are programmed to be illuminated as RED.
User-Programmable LED Configuration
The 2 user-programmable LEDs are assigned to any functions by navigating OUTPUT CONFIG > OUTPUT
MATRIX menu.
2.1.4
1Default factory setting and can be programmed as per user requirements.
Device Functionality
2.1 Front Fascia
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The user-programmable LEDs have default mapping as follows:
•LED L2: 50-1 function and 51-1 function
•LED L3: 50N-1 function and 51N-1 function
This default configuration is printed as O/C and E/F respectively on one side of the paper label provided with
the decal.
If you decide to change the configuration of the programmable LEDs, then write the name of the function (to
which the programmable LED is mapped) on the rear side of the paper label provided with the decal.
If the LEDs are mapped to any function, then they turn on whenever the function trips. For example if an LED
is mapped to the 51-1 function, then the LED is turned on when the relay trips due to 51-1 fault.
If the LEDs are mapped to a miscellaneous function, then the LEDs turn on as the event occurs. For example if
the LED is mapped to BI 1 operated, then the LED is turned on when BI 1 input is present.
Table 2-2 Binary Output ‑ LED Default Value
Parameters Description LED Default Value
50-1 50-1 element operate L2
50-2 50-2 element operate –
51-1 51-1 element operate L2
50N-1 50N-1 element operate L3
50N-2 50N-2 element operate –
51N-1 51N-1 element operate L3
50LC 50LC/SOTF element operate –
81HBL2 Inrush current element operate –
Active Grp 1 Active Group 1 –
Active Grp 2 Active Group 2 –
General pickup Pickup detected –
IL1/A Phase A tripped –
IL2/B Phase B tripped –
IL3/C Phase C tripped –
IE/E Derived earth E tripped –
Prot'n Healthy2Protection healthy X
Low Battery2Battery voltage low indication X
IRF2Internal relay failure X
Local mode Local mode –
Remote mode Remote mode –
Out of Service mode Out-of-service mode –
BI1 Operated BI1 operated –
BI2 Operated BI2 operated –
ET Operated ET Operated –
For more details on Binary Outputs, refer to 2.5 Binary Outputs .
User-Programmable LED Operations
The 2 user-programmable LEDs can be configured as Self Reset or Hand Reset (default) by navigating
OUTPUT CONFIG > LED CONFIG.
2LEDs cannot be mapped to Prot'n Healthy, Low Battery and IRF. A X appears in the HMI for these functions. In Reydisp Evolution, LED
configuration for these functions is disabled.
Device Functionality
2.1 Front Fascia
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Table 2-3 User-Programmable LED Operations
Parameters Description LED Default Value
L2 L2 self reset or hand reset – (hand reset)
L3 L3 self reset or hand reset – (hand reset)
If the LED is configured as Self Reset, then LED turns on when the function is active and turns off when func-
tion resets. If the device goes to sleep when the LED was on, then on device wake-up the LED remains turned
on as long as the configured function is still active.
If the LED is configured as Hand Reset, then the LED is turned on when the function is active. The LED remains
on even after the configured function resets. If the device goes to sleep when the LED was turned on, then on
device wake-up the LED remains turned on irrespective of the configured function status. The LED can only be
reset by pressing the ▶ key (TEST/RESET key), through BI - Rst LEDs & O/Ps function and through
Modbus or IEC 103 commands.
Local Flag
Local flag is an electromechanical bi-stable flag fitted in the front fascia to indicate the trip condition. The
status of the flag is BLACK in normal operation and turns TANGERINE color during the trip condition.
The auxiliary voltage or phase currents provide the energy required to show the trip indication. The trip indica-
tion is retained even in the absence of auxiliary voltage and phase currents.
The flag indicates a trip indication when any protection function operates, or any binary inputs or external trip
initiation inputs are mapped to a trip pulse output.
The trip indication can be reset with any power mode by pressing the ▶ key (TEST/RESET key).
Rating Label
The device is identified by the rating label on the front fascia. You can also give the device its own identity by
editing the “Relay Identifier” displayed on the LCD.
[sc_7SR46_RatingsLabel, 1, --_--]
Figure 2-3 Fascia Relay Rating Label
The rating label contains the following product information:
•MLFB (machine-readable product designation), with hardware-version suffix
•Device family name
•Auxiliary voltage range
•Rated frequency
•Binary input voltage
•Serial number
– GF – Goa factory
– YY – Year of manufacturing
– MM – Month of manufacturing
– XXXXXX – Serial number of the relay
2.1.5
2.1.6
Device Functionality
2.1 Front Fascia
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