Siemens 7SR45 Argus Application guide

Reyrolle
7SR45
V03.00
Device Manual
C53000-G7040-C101-2
Preface
Open Source Software
Table of Contents
Introduction 1
Device Functionality 2
Functions 3
Technical Data 4
Applications 5
Functional Tests 6
Appendix A
Index

i
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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-C101-2.0
Edition: 09.2020
Version of the product described: V03.00
Copyright
Copyright © Siemens 2020. 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 device family. It describes various functions (protection and supervi-
sion) 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_7SR45_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.
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•Operating manual
The operating manual describes the basic principles and procedures for operating and installing the
devices of the Reyrolle range.
•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.
•Security manual
The Security manual describes the security features of the Reyrolle 5 devices and Reydisp Manager.
•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 .
•Selection guide for Reyrolle and SIPROTEC
The selection guide offers an overview of the device series of the Siemens protection devices, and a
device selection table.
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
Customer Support Center
Humboldtstraße 59
90459 Nuremberg
Germany
Phone: [phone]
E-mail: [email protected]
Training Courses
Inquiries regarding individual training courses should be addressed to our Training Center:
Siemens AG Phone: [phone]
Siemens Power Academy TD Fax: [phone]
Humboldtstrasse 59 E-mail: [email protected]
Preface
4 Reyrolle, 7SR45, Device Manual
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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
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.
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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.
Preface
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Problem-free and safe operation of the product depends on the following:
•Proper transport
•Proper storage, setup and installation
•Proper operation and maintenance
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
Nr. 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 Guideline for the Eurasian Market
11 Mandatory Conformity Mark for Electronics and Electrotechnical Products in Morocco
12 South Korea KC Certification for Electrical and Electronic Products
Preface
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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
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Table of Contents
Preface..........................................................................................................................................................3
Open Source Software..................................................................................................................................7
1 Introduction................................................................................................................................................11
1.1 7SR45 Overcurrent and Earth Fault Relay Overview............................................................12
1.2 Ordering Options.............................................................................................................. 14
2 Device Functionality................................................................................................................................... 17
2.1 Front Fascia...................................................................................................................... 18
2.1.1 Front Fascia ................................................................................................................ 18
2.1.2 Liquid Crystal Display................................................................................................... 19
2.1.3 Keypad........................................................................................................................20
2.1.4 Light Emitting Diode (LED)...........................................................................................21
2.1.5 Local Flag.................................................................................................................... 23
2.1.6 Relay Information........................................................................................................ 24
2.2 Binary Inputs ....................................................................................................................26
2.3 Binary Outputs ................................................................................................................. 28
2.4 Pulse Output .................................................................................................................... 31
2.5 Remote Flag Output ......................................................................................................... 32
2.6 Reset LED, Trip Flag Indication, and Binary Outputs............................................................33
2.7 Data Storage..................................................................................................................... 36
2.8 Real Time Clock ................................................................................................................ 37
3 Functions.................................................................................................................................................... 39
3.1 Functions Available in the 7SR45 Device............................................................................40
3.2 Instantaneous Overcurrent Protection (50) ....................................................................... 41
3.3 Time-Delayed Overcurrent Protection (51).........................................................................44
3.4 Instantaneous Derived Earth Fault Protection (50N) ..........................................................50
3.5 Time-Delayed Derived Earth Fault Protection (51N) ...........................................................53
3.6 Instantaneous Measured Earth Fault Protection (50G) .......................................................58
3.7 Time-Delayed Measured Earth Fault Protection (51G) ....................................................... 61
3.8 Switch onto Fault Protection (50LC/SOTF) .........................................................................66
3.9 Thermal Overload Protection (49) .....................................................................................71
3.10 2nd Harmonic Block/Inrush Restraint (81HBL2).................................................................. 75
4 Technical Data............................................................................................................................................ 77
4.1 General Device Data..........................................................................................................78
4.2 Instantaneous Overcurrent Protection (50)........................................................................80
4.3 Time-Delayed Overcurrent Protection (51).........................................................................81
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4.4 Instantaneous Derived Earth Fault Protection (50N)...........................................................82
4.5 Time-Delayed Derived Earth Fault Protection (51N)............................................................83
4.6 Instantaneous Measured Earth Fault Protection (50G)....................................................... 84
4.7 Time-Delayed Measured Earth Fault Protection (51G)........................................................ 85
4.8 Switch On To Fault Protection (50LC/SOTF)........................................................................86
4.9 Thermal Overload Protection (49)......................................................................................87
4.10 2nd Harmonic Block/Inrush Restraint (81HBL2).................................................................. 88
5 Applications................................................................................................................................................89
5.1 Overview ......................................................................................................................... 90
5.2 Current-Transformer Requirements and Sample Calculations............................................. 91
5.2.1 Current-Transformer Requirements ............................................................................. 91
5.3 Time-Delayed Overcurrent (51/51G/51N) ..........................................................................95
5.4 Overcurrent Characteristics............................................................................................... 97
5.4.1 Selection of Overcurrent Characteristics ...................................................................... 97
5.4.2 Reset Delay .................................................................................................................97
5.5 Instantaneous Overcurrent (50/50G/50N) ......................................................................... 98
5.6 Thermal Overload (49)...................................................................................................... 99
5.7 Inrush Response .............................................................................................................101
5.8 Inrush Detector (81HBL2) ...............................................................................................102
6 Functional Tests........................................................................................................................................103
6.1 Commissioning Notes..................................................................................................... 104
6.2 Before Testing.................................................................................................................105
6.2.1 Safety........................................................................................................................105
6.2.2 Sequence of Tests .....................................................................................................105
6.2.3 Test Equipment ........................................................................................................ 106
6.2.4 Use of Laptop Computer to Facilitate Testing .............................................................106
6.3 Applying Settings............................................................................................................107
A Appendix.................................................................................................................................................. 109
A.1 Connection Examples for RMU Application...................................................................... 110
A.2 Connection Examples for Distribution Transformer Application........................................ 112
A.3 Connection Examples for Phase and CBCT Measurement..................................................114
A.4 Connection Examples for Earth-Fault Application.............................................................115
A.5 Revision History.............................................................................................................. 116
Index.........................................................................................................................................................117
Table of Contents
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Introduction
1.1 7SR45 Overcurrent and Earth Fault Relay Overview 12
1.2 Ordering Options 14
1
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7SR45 Overcurrent and Earth Fault Relay Overview
The 7SR45 Argus self powered/dual powered non-directional overcurrent and earth fault relay is a member of
the Siemens Reyrolle protection devices Argus product family. The relay is developed using the latest genera-
tion of hardware technology and is available in multiple variants depending on the following:
•CT ratings (1 A/5 A)
•Auxiliary power supply
•Communication configuration
•Binary inputs (2/4)
•Binary outputs (2/4)
•Pulse output
•Local/remote flag indicator
[sc_7SR45_argusrelay_devices, 1, en_US]
Figure 1-1 7SR45 Overcurrent and Earth Fault Relay
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NOTE
In this Manual, the 7SR45 Argus self powered/dual powered non-directional overcurrent and earth fault
relay will be referred as 7SR45 Argus relay
1.1
Introduction
1.1 7SR45 Overcurrent and Earth Fault Relay Overview
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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 – Trip ready at 20 % of Irated (1-phase) and 10 % of Irated (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
•2 case options for mounting in various size RMUs
•Front Fascia with 5 non-programmable LEDs and 4 user programmable LEDs
•Mechanical flag for trip indication
Communication Protocols Supported
•IEC 60870-5-103
•Modbus RTU
Device Functionality Overview
The 7SR45 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 supply.
The relay functionality can be configured via a front USB port for local PC connection or rear electrical RS485
(optional) port for remote connection. By using the Reydisp Evolution software, the user 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 helps in estab-
lishing connection to SCADA. The relay can indicate the trip with local and remote flag indicator based on the
ordering options.
Main function Overcurrent and Earth-Fault Protection
Inputs and outputs 4 current transformers with
•1 A or 5 A inputs
•2 or 4 binary inputs
•2 or 4 binary outputs
•Pulse output
•Local/remote flag indicator
Communication Front USB port (for configuration via Reydisp Evolution) and rear RS485 port
(optional)
Housing Size 4 – non draw‑out case with mounting options available in standard 4U rack
height or height-reduced side-mounting arrangement
Introduction
1.1 7SR45 Overcurrent and Earth Fault Relay Overview
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Ordering Options
Ordering Information – 7SR45 Argus
Product Description Order Number
1 2 3 4 5 6 7 – 8 9 10 11 12 – 13 14 15 16
Non-Directional Overcurrent and Earth
Fault Relay
7 S R 4 5 0 □ – □ □ □ □ 0 – 1 A □ 0
| |||| ||
Case I/O and Fascia | | | | | | |
Size 4 moulded case, 4 CT1, 2 BI/2 BO, pulse output, 9 LEDs 1 | G A/
B
| | |
Size 4 moulded case, 4 CT1, 2 BI/2 BO, pulse output, 9 LEDs 1 | H/J A | | |
Size 4 moulded case, 4 CT1, 4 BI/4 BO, pulse output, 9 LEDs 2 | H/J B | | |
Size 4 moulded case (height reduced), 4 CT1, 2 BI/2 BO, pulse output,
9 LEDs
3 | G A/
B
| | |
Size 4 moulded case (height reduced), 4 CT1, 2 BI/2 BO, pulse output,
9 LEDs
3 | H/J A | | |
Size 4 moulded case (height reduced), 4 CT1, 4 BI/4 BO, pulse output,
9 LEDs
4 | H/J B | | |
|||| ||
Measuring Input | | | | | |
1 A, 50 Hz/60 Hz 1 | | | | |
5 A, 50 Hz/60 Hz 2 | | | | |
||| ||
Auxiliary Voltage | | | | |
Self powered (CT powered : BI threshold DC 19 V) G | 1 | |
Dual powered (CT powered + Aux. powered : DC 24 V to 60 V, BI threshold: DC
19 V)
H | 2 | |
Dual powered (CT powered + Aux. powered : AC 60 V to 240 V/DC 60 V to 240 V,
BI threshold: AC 88 V/DC 88 V)
J | 2 | |
| | | |
Front Fascia | | | |
Standard version A | | |
Standard version – with trip flag indicator B | | |
| | |
Communication Options | | |
Front port : USB 1 | |
Front port: USB and rear port: RS485 supporting IEC 60870-5-103 and Modbus RTU (user-
selectable setting)
2 | |
| |
Protection Function Packages A |
49 Thermal overload2|
50 Instantaneous overcurrent – phase |
50G Instantaneous earth fault – measured |
50LC Line check/Switch onto fault |
50N Instantaneous earth fault – calculated |
1.2
14CT is configured as 3-Phase Fault + Earth Fault
2Not available for 7SR450[1/3]-xGA10-1AA0 MLFB variants
Introduction
1.2 Ordering Options
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Product Description Order Number
51 Time-delayed overcurrent – phase |
51G Time-delayed earth fault – measured |
51N Time-delayed earth fault – calculated |
81HBL2 Inrush detector2|
Conformal coating |
Standard version – No conformal coating on PCBA A
Conformal coating on PCBA B
Ordering Information – 7SR45 Argus Spares and Accessories
Variants Description
7XG1900-1AA00-0AA0 Main battery CR123A 3
7XG1900-2AA00-0AA0 RTC battery CR1632 3
7XG1900-3AA00-0AA0 Main battery CR123A + RTC battery CR1632 3
7XG1900-0MA54-0FC0 Transparent front cover for height reduced
7SR4503/7SR4504 variants
7XG1900-0MA55-0FC0 Surface mounting bracket
7XG1900-0MA56-0FC0 CT terminal cover for IP20
3Siemens recommends to procure these battery spares from local market.
Introduction
1.2 Ordering Options
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Device Functionality
2.1 Front Fascia 18
2.2 Binary Inputs 26
2.3 Binary Outputs 28
2.4 Pulse Output 31
2.5 Remote Flag Output 32
2.6 Reset LED, Trip Flag Indication, and Binary Outputs 33
2.7 Data Storage 36
2.8 Real Time Clock 37
2
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Front Fascia
Front Fascia
The front fascia is part of the relay. It is designed to provide a user-friendly method of entering the settings
and retrieving data from the relay. You can access all of the push-buttons and perform the setting changes.
The front fascia contains 5 predefined LED lists which provide the information about the LED indicators and a
paper label for 4 user-programmable LEDs. By using the TEST/RESET ▶ keys, 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
Front Fascia with Flag Output
[dw_7SR45_frontfascia_withflagoutput, 1, en_US]
Figure 2-1 Front Fascia with Flag Output
2.1
2.1.1
Device Functionality
2.1 Front Fascia
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Front Fascia without Flag Output
[dw_7SR45_frontfascia_withoutflagoutput, 1, en_US]
Figure 2-2 Front Fascia without Flag Output
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NOTE
7SR45 Argus Relay devices (7SR450/FF and 7SR450/EE) having the front fascia label with 9 non-program-
mable LEDs can be upgraded with the latest firmware release 2438H8001R2f-1a.
In this case, you can use one of the following approaches:
•Use the device as it is with the non-programmable LED front fascia, map the LEDs L4 to L7 to the
default settings that is, LED 4 → IL1/A; LED 5 → IL2/B; LED 6 → IL3/C; and LED 7 → IE/E.
•Stick a paper label on top of LED L4 to L7, similar to as shown in Figure 2-1, Figure 2-2. These LEDs can
then be mapped to any desired function as needed.
Liquid Crystal Display
A 2 line by 16 character alpha-numeric liquid crystal displays information of settings mode, instrument mode
and fault data mode.
[sc_lcd_display, 1, en_US]
Figure 2-3 7SR45 Relay LCD
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 and BO
2.1.2
Device Functionality
2.1 Front Fascia
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•Battery profile
•Auxiliary-power status
•Primary and secondary 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. Up to 4
general alarms can be programmed, each triggered from 1 or more inputs. Each general alarm also generates
an event.
If the 7SR45 Argus Relay is powered on with phase CT input and the current is more than 0.4 ⋅ Irated (1 phase)
or 0.14 ⋅ Irated (3 phases), the backlight turns on automatically. If the 7SR45 Argus Relay is energized with
current less than the defined limits, the backlight does not turn on.
If the 7SR45 Argus Relay is powered on by inserting a USB cable, the 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
HMI for more than 30 s, the backlight turns off automatically to save energy.
In the phase CT power mode, the 7SR45 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,
the backlight turns off due to the switching of the power mode from USB or battery to CT power. If sufficient
current is available then the backlight can be turned on again.
For more information about the power source, refer to the Modes of Operation chapter in the 7SR45 Oper-
ating Manual.
Keypad
The 7SR45 Argus Relay keypad 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 additional keys are available for LCD backlight and battery mode.
The 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 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 the LEDs,
binary output, and trip flag indication.
2.1.3
Device Functionality
2.1 Front Fascia
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