Siemens Argus 7SR21 User manual

Energy Management
7SR21 & 7SR22 Argus
Overcurrent Relay
Reyrolle
Protection
Devices

The copyright and other intellectual property rights in this document, and in any model or article produced from it
(and including any registered or unregistered design rights) are the property of Siemens Protection Devices
Limited. No part of this document shall be reproduced or modified or stored in another form, in any data retrieval
system, without the permission of Siemens Protection Devices Limited, nor shall any model or article be
reproduced from this document unless Siemens Protection Devices Limited consent.
While the information and guidance given in this document is believed to be correct, no liability shall be accepted
for any loss or damage caused by any error or omission, whether such error or omission is the result of
negligence or any other cause. Any and all such liability is disclaimed.
© 2013 Siemens Protection Devices Limited
Contents
Technical Manual Sections
1. Description of Operation
2. Configuration Guide
3. 7SR210 Instrumentation Guide
4. 7SR210 Settings Guide
5. 7SR220 Instrumentation Guide
6. 7SR220 Settings Guide
7. Performance Specification
8. Data Communications Definitions
9. Installation Guide
10. Commissioning and Maintenance Guide
11. Applications Guide

Contents 7SR11 and 7SR12
Page 2 of 2 ©2018 Siemens Protection Devices Limited

7SR210 & 7SR220 Description of Operation
Unrestricted The copyright and other intellectual property rights in this document, and in any model or article
produced from it (and including any registered or unregistered design rights) are the property of Siemens
Protection Devices Limited. No part of this document shall be reproduced or modified or stored in another form, in
any data retrieval system, without the permission of Siemens Protection Devices Limited, nor shall any model or
article be reproduced from this document unless Siemens Protection Devices Limited consent.
While the information and guidance given in this document is believed to be correct, no liability shall be accepted
for any loss or damage caused by any error or omission, whether such error or omission is the result of
negligence or any other cause. Any and all such liability is disclaimed.
©2018 Siemens Protection Devices Limited
7SR210 Non-Directional Relay
7SR220 Directional Relay
Description Of Operation

7SR210 & 7SR220 Description of Operation
Unrestricted ©2018 Siemens Protection Devices Limited Page 2 of 94
Document Release History
This document is issue 2018/09. The list of revisions up to and including this issue is: -
2011/05 First issue.
2013/01 Typographical revisions and added data. Updated in line with software release.
2014/06 Typographical revisions and added data. Updated in line with software release.
2015/06 Typographical revisions amended drawings and added data. Updated in line with software
release.
2015/07 Amended drawings.
2016/02 Typographical revisions and added data. Updated in line with software release.
2016/11 Redundancy added to electrical ethernet interface
2017/08 Typographical revisions and added data. Updated in line with software release.
2017/12 Typographical revisions and added data.
2018/09 Typographical revisions.
Software Revision History
2011/05 2435H85008R7a-7a (7SR210)
2435H85009R7a-7a (7SR220)
First Release
2013/01 2435H85008R7c-7b (7SR210)
2435H85009R7c-7b (7SR220)
Introduced journaling file system.
Added 61850 logical nodes for CB Counters, metering, 50BF,
46BC, 81HBL2 and line check.
Added Line Check on non-AR devices.
Added 74CCS Close Circuit Supervision.
2014/06 2435H85008R7f-7d (7SR210)
2435H85009R7f-7d (7SR220)
Added Fault Locator feature and Check Sync feature.
Fault data transmission over IEC 60870-5-103.
Additional communications data, control features, meters.
2015/06 2435H85008R8a-7f (7SR210)
2435H85009R8a-7f (7SR220)
Added Power Factor Meters, Load Blinding feature, Arc Flash
Detector. Over current TM Setting Range extended.
2016/02 2435H85008R8b-7f (7SR210)
2435H85009R8b-7f (7SR220)
EN100+ Compatibility.
2017/08 2435H85008R8e-8a (7SR210)
2435H85009R8e-8a (7SR220)
Added 32 Directional Power, 32S Sensitive Power, 55 Power
Factor, 81HLB5 Overfluxing, 67SEF Compensated Network,
67SEF Wattmetric. Increased I/O. Event Data on LCD.

7SR210 & 7SR220 Description of Operation
Unrestricted ©2018 Siemens Protection Devices Limited Page 3 of 94
Contents
Document Release History.................................................................................................................................2
Software Revision History ..................................................................................................................................2
Contents............................................................................................................................................................3
List of Figures....................................................................................................................................................5
Section 1: Introduction .......................................................................................................................................8
1.1 Current Transformer Circuits..............................................................................................................8
1.2 External Resistors..............................................................................................................................8
1.3 Fibre Optic Communication................................................................................................................8
1.4 Front Cover .......................................................................................................................................8
1.5 Disposal ............................................................................................................................................8
Section 2: Hardware Description ......................................................................................................................15
2.1 General ...........................................................................................................................................15
2.2 Case ...............................................................................................................................................16
2.3 Front Cover .....................................................................................................................................16
2.4 Power Supply Unit (PSU).................................................................................................................16
2.5 Operator Interface/ Fascia................................................................................................................16
2.6 Current Inputs..................................................................................................................................21
2.7 Voltage Inputs .................................................................................................................................21
2.8 Binary Inputs ...................................................................................................................................21
2.9 Binary Outputs (Output Relays)........................................................................................................22
2.10 Virtual Input/Outputs ........................................................................................................................23
2.11 Self Monitoring ................................................................................................................................23
2.11.1 Protection Healthy/Defective...............................................................................................24
Section 3: Protection Functions ........................................................................................................................ 25
3.1 Current Protection: Phase Overcurrent (67, 51, 50)...........................................................................25
3.1.1 Directional Control of Overcurrent Protection (67) – 7SR22 .................................................25
3.1.2 Instantaneous Overcurrent Protection (50)..........................................................................27
3.1.3 Time Delayed Overcurrent Protection (51) ..........................................................................28
3.2 Current Protection: Voltage Controlled Overcurrent (51V) – 7SR22 ...................................................30
3.3 Current Protection: Derived Earth Fault (67N, 51N, 50N)...................................................................31
3.3.1 Directional Control of Derived Earth Fault Protection (67N) – 7SR22.................................... 31
3.3.2 Instantaneous Derived Earth Fault Protection (50N) ............................................................32
3.3.3 Time Delayed Derived Earth Fault Protection (51N).............................................................33
3.4 Current Protection: Measured Earth Fault (67G, 51G, 50G)...............................................................35
3.4.1 Directional Control of Measured Earth Fault Protection (67G) – 7SR22................................35
3.4.2 Instantaneous Measured Earth Fault Protection (50G).........................................................36
3.4.3 Time Delayed Measured Earth Fault Protection (51G).........................................................37
3.5 Current Protection: Sensitive Earth Fault (67SEF, 51SEF, 50SEF)....................................................38
3.5.1 Directional Control of Sensitive Earth Fault Protection (67SEF) – 7SR22 .............................38
3.5.2 Instantaneous Sensitive Earth Fault Protection (50SEF)......................................................39
3.5.3 Time Delayed Sensitive Earth Fault Protection (51SEF) ...................................................... 41
3.6 Current Protection: High Impedance Restricted Earth Fault (64H) .....................................................43
3.7 Current Protection: Cold Load (51c) .................................................................................................44
3.8 Current Protection: Negative Phase Sequence Overcurrent (46NPS) ................................................45
3.9 Current Protection: Under-Current (37, 37G & 37SEF)......................................................................46
3.10 Current Protection: Under-Current Guarded (37)...............................................................................46
3.11 Current Protection: Thermal Overload (49) .......................................................................................47
3.12 Current Protection: Arc Flash Detector (50 AFD)...............................................................................49
3.13 Voltage Protection: Phase Under/Over Voltage (27/59) - 7SR22 .......................................................50
3.14 Voltage Protection: Negative Phase Sequence Overvoltage (47) – 7SR22 ........................................51
3.15 Voltage Protection: Neutral Overvoltage (59N) – 7SR22 ...................................................................52
3.16 Voltage Protection: Under/Over Frequency (81) – 7SR22..................................................................53
3.17 Power Protection: Power (32) – 7SR22 ............................................................................................54
3.18 Power Protection: Sensitive Power (32S) – 7SR22 ...........................................................................55
3.19 Power Protection: Power Factor (55) – 7SR22.................................................................................56
Section 4: Control & Logic Functions ................................................................................................................57
4.1 Auto-Reclose (79)............................................................................................................................57
4.1.1 Overview............................................................................................................................57
4.1.2 Auto Reclose sequences ....................................................................................................59
4.2 Autoreclose Prot’n Menu.................................................................................................................. 60
4.3 Autoreclose Config Menu.................................................................................................................60
4.4 P/F Shots Sub-Menu........................................................................................................................62
4.5 E/F Shots Sub-Menu........................................................................................................................62
4.6 SEF Shots Sub-Menu ......................................................................................................................62

7SR210 & 7SR220 Description of Operation
Unrestricted Page 4 of 94 ©2018 Siemens Protection Devices Limited
4.7 Extern Shots Sub-Menu .................................................................................................................. 63
4.8 Manual Control................................................................................................................................ 65
4.9 Synchronising ................................................................................................................................. 66
4.9.1 Reclosure Modes............................................................................................................... 66
4.9.2 Charge Delays................................................................................................................... 66
4.9.3 Voltage monitoring elements .............................................................................................. 66
4.9.4 Check Synchronising Mode................................................................................................ 68
4.9.5 System Split Detector ........................................................................................................ 69
4.9.6 System Sync Reversion..................................................................................................... 69
4.9.7 System Synchronising Mode.............................................................................................. 70
4.9.8 Close on Zero Mode .......................................................................................................... 70
4.10 Live/Dead Indication........................................................................................................................ 71
4.11 Circuit Breaker ................................................................................................................................ 72
4.12 Quick Logic..................................................................................................................................... 75
Section 5: Supervision Functions ..................................................................................................................... 77
5.1 Circuit Breaker Failure (50BF) ......................................................................................................... 77
5.2 VT Supervision (60VTS) – 7SR22.................................................................................................... 78
5.3 Busbar VT Fail (60VTF-Bus) – 7SR22 ............................................................................................. 79
5.4 CT Supervision (60CTS & 60CTS-I)................................................................................................. 80
5.4.1 (60CTS-I) – 7SR21 & 7SR22 ............................................................................................. 80
5.4.2 (60CTS) – 7SR22 .............................................................................................................. 80
5.5 Broken Conductor (46BC) ............................................................................................................... 81
5.6 Trip / Close Circuit Supervision (74TCS & 74CCS)........................................................................... 81
5.7 Inrush Restraint (81HBL2)............................................................................................................... 82
5.8 Over Fluxing Detector (81HLB5)...................................................................................................... 83
5.9 Load Blinder (21) ............................................................................................................................ 84
5.9.1 Load Blinder (21) Three-Phase .......................................................................................... 84
5.9.2 Load Blinder (21) Single-Phase.......................................................................................... 85
Section 6: Other Features................................................................................................................................ 87
6.1 Data Communications ..................................................................................................................... 87
6.2 Maintenance ................................................................................................................................... 87
6.2.1 I2t CB Wear ....................................................................................................................... 88
6.2.2 Output Matrix Test ............................................................................................................. 88
6.3 Data Storage................................................................................................................................... 89
6.3.1 General ............................................................................................................................. 89
6.3.2 Event Records................................................................................................................... 89
6.3.3 Waveform Records. ........................................................................................................... 89
6.3.4 Fault Records.................................................................................................................... 90
6.3.5 Demand ............................................................................................................................ 90
6.3.6 Data Log ........................................................................................................................... 90
6.3.7 Energy Storage ................................................................................................................. 91
6.3.8 Fault Locator ..................................................................................................................... 92
6.4 Metering ......................................................................................................................................... 92
6.5 Operating Mode .............................................................................................................................. 93
6.6 Control Mode .................................................................................................................................. 93
6.7 Real Time Clock.............................................................................................................................. 93
6.7.1 Time Synchronisation - Data Communication Interface ....................................................... 94
6.7.2 Time Synchronisation – Binary Input .................................................................................. 94
6.7.3 Time Synchronisation – IRIG-B (Optional) .......................................................................... 94
6.8 Settings Groups .............................................................................................................................. 94
6.9 Password Feature........................................................................................................................... 94

7SR210 & 7SR220 Description of Operation
Unrestricted ©2018 Siemens Protection Devices Limited Page 5 of 94
List of Figures
Figure 1.5-1 Functional Diagram of 7SR21 Relay..............................................................................10
Figure 1.5-2 Connections Diagram for 7SR21 Relay .........................................................................11
Figure 1.5-3 Functional Diagram of 7SR22 Relay..............................................................................13
Figure 1.5-4 Connection Diagram for 7SR22 Relay ...........................................................................14
Figure 2.5-1 7SR21 with 3 + 8 LEDs in E6 Case ...............................................................................17
Figure 2.5-2 7SR220 with 3 + 16 LEDs in E8 Case ...........................................................................17
Figure 2.5-3 7SR22 with Function Keys and 3 + 8 LEDs in E8 Case..................................................17
Figure 2.5-4 7SR22 with Function Keys & 3 + 8 LEDs in E8 Case and Ethernet
Communication Interface...............................................................................................18
Figure 2.8-1 Binary Input Logic..........................................................................................................21
Figure 2.9-1 Binary Output Logic.......................................................................................................22
Figure 2.11-1 Start-up Counter Meter................................................................................................23
Figure 2.11-2 Start-up Counter Meter................................................................................................23
Figure 2.11-3 Start-up Counter Meter Events ....................................................................................24
Figure 3.1.1-1 Logic Diagram: Directional Overcurrent Element (67).............................................26
Figure 3.1.2-1 Logic Diagram: Instantaneous Over-current Element..............................................27
Figure 3.1.3-1 Logic Diagram: Time Delayed Overcurrent Element ...............................................29
Figure 3.2-1 Logic Diagram: Voltage Controlled Overcurrent Protection.............................................30
Figure 3.3.1-1 Logic Diagram: Derived Directional Earth Fault Element.........................................32
Figure 3.3.2-1 Logic Diagram: Derived Instantaneous Earth Fault Element ...................................33
Figure 3.3.3-1 Logic Diagram: Derived Time Delayed Earth Fault Protection.................................34
Figure 3.4.1-1 Logic Diagram: Measured Directional Earth Fault Protection ..................................35
Figure 3.4.2-1 Logic Diagram: Measured Instantaneous Earth-fault Element.................................36
Figure 3.4.3-1 Logic Diagram: Measured Time Delayed Earth Fault Element (51G) ......................37
Figure 3.5.1-1 Logic Diagram: SEF Directional Element (67SEF)..................................................39
Figure 3.5.2-1 Logic Diagram: 50 SEF Instantaneous Element......................................................40
Figure 3.5.2-2 Logic Diagram: 50 SEF Instantaneous Element Compensated Networks................40
Figure 3.5.3-1 Logic Diagram: 51 SEF Time Delayed Element......................................................42
Figure 3.5.3-2 Logic Diagram: 51 SEF Time Delayed Element Compensated Networks................42
Figure 3.6-1 Logic Diagram: High Impedance REF (64H) ..................................................................43
Figure 3.7-1 Logic Diagram: Cold Load Settings (51c).......................................................................44
Figure 3.8-1 Logic Diagram: Negative Phase Sequence Overcurrent (46NPS) ..................................45
Figure 3.9-1 Logic Diagram: Undercurrent Detector (37, 37G & 37SEF) ............................................46
Figure 3.10-1 Logic Diagram: Undercurrent Guarded Detector (37)..............................................46
Figure 3.11-1 Logic Diagram: Thermal Overload Protection (49S)................................................48
Figure 3.12-1 Logic Diagram: Arc Flash Detector (50 AFD)..........................................................49
Figure 3.13-1 Logic Diagram: Under/Over Voltage Elements (27/59) ...........................................50
Figure 3.14-1 Logic Diagram: NPS Overvoltage Protection (47)...................................................51
Figure 3.15-1 Logic Diagram: Neutral Overvoltage Element.........................................................52
Figure 3.16-1 Logic Diagram: Under/Over Frequency Detector (81).............................................53
Figure 3.17-1 Logic Diagram: Power Protection (32) ....................................................................54
Figure 3.18-1 Logic Diagram: Sensitive Power Protection (32S)...................................................55
Figure 3.19-1 Logic Diagram: Power Factor Protection (55) .........................................................56
Figure 4.1.2-1 Typical Sequence with 3 Instantaneous and 1 Delayed trip ....................................59
Figure 4.7-1 Basic Auto-Reclose Sequence Diagram ........................................................................64
Figure 4.9.3-1 Voltage Detector Operation....................................................................................67
Figure 4.9.4-1 Check Sync Function .............................................................................................68
Figure 4.9.7-1 System Sync Function ...........................................................................................70
Figure 4.9.8-1 Close On Zero Function.........................................................................................71
Figure 4.9.8-2 Close On Zero Timing............................................................................................71
Figure 4.10-1 Voltage Detector Operation....................................................................................72
Figure 4.11-1 Logic Diagram: Circuit Breaker Status....................................................................73
Figure 4.12-1Sequence Diagram: Quick Logic PU/DO Timers (Counter Reset Mode Off) ..................76
Figure 5.1-1 Logic Diagram: Circuit Breaker Fail Protection (50BF) ...................................................77
Figure 5.2-1 Logic Diagram: VT Supervision Function (60VTS) .........................................................79
Figure 5.4.1-1 Logic Diagram: CT Supervision Function (60CTS-I) – 7SR21 & 7SR22..................80
Figure 5.4.2-1 Logic Diagram: CT Supervision Function (60CTS) – 7SR22 ...................................80
Figure 5.5-1 Logic Diagram: Broken Conductor Function (46BC).......................................................81

7SR210 & 7SR220 Description of Operation
Unrestricted Page 6 of 94 ©2018 Siemens Protection Devices Limited
Figure 5.6-1 Logic Diagram: Trip Circuit Supervision Feature (74TCS) .............................................81
Figure 5.6-2 Logic Diagram: Close Circuit Supervision Feature (74CCS)..........................................82
Figure 5.7-1 Logic Diagram: Harmonic Block Feature (81HBL2)........................................................82
Figure 5.8-1 Logic Diagram: Over Fluxing Detector (81HLB5) ...........................................................83
Figure 5.9.1-1 Logic Diagram: Load Blinder Three-Phase .............................................................84
Figure 5.9.2-1 Logic Diagram: Load Blinder Single-Phase ............................................................85
Figure 5.9.2-2 Load Blinder and Angle..........................................................................................86
Figure 6.3.7-1 Energy Direction Convention..................................................................................91
LIST OF TABLES
Table 1.5-1 Ordering Information – 7SR21 Non-Directional Overcurrent.............................................9
Table 1.5-2 Ordering Information – 7SR22 Directional Overcurrent ..................................................12
Table 2.1-1 Summary of Overcurrent Relay Configurations ..............................................................15
Table 6.5-1 Operation Mode ............................................................................................................93

7SR210 & 7SR220 Description of Operation
Unrestricted ©2018 Siemens Protection Devices Limited Page 7 of 94
Symbols and Nomenclature
The following notational and formatting conventions are used within the remainder of this
document:
·Setting Menu Location MAIN MENU>SUB-MENU
·Setting: Elem name -Setting
·Setting value: value
·Alternatives: [1st] [2nd] [3rd]
c
start
trip
Elem Starter
Elem Inhibit
Elem Reset Delay
c
Forward
Reverse
Elem Char Dir
Non-Dir
L1 Dir Blk
PhaseAFwd
Binary input signal
Binary Output visible to user
Digital signal to/from another
element
List of settings associated with a specific
function
Appropriate list is TRUE when setting
selected.
Digital signal not visible to
user, internal to this element
IL1
Analogue signal with signal
description
Common setting for multiple functions
c
start
trip
Function.
Individual functions are enabled when
associated control input (c) is TRUE.
Common control input (c) for multiple
functions. All functions are enabled
when control input is TRUE.
&
And Gate
(2 inputs shown)
1
Or Gate
(3 inputs shown) INST.
EVENT
EVENT: IEC, Modbus or DNP
Where applicable
Relay instrument
1
Exclusive Or (XOR) Gate
(3 inputs shown)

7SR210 & 7SR220 Description of Operation
Unrestricted Page 8 of 94 ©2018 Siemens Protection Devices Limited
Section 1: Introduction
This manual is applicable to the following relays:
·7SR210 Multi-Function Non-directional Overcurrent and Earth Fault Relay
·7SR220 Multi-Function Directional Overcurrent and Directional Earth Fault Relay
The 7SR210 and 7SR220 relays integrate the protection and control elements required to provide a complete
overcurrent based protection.
The ‘Ordering Options’ Tables summarise the features available in each model.
General Safety Precautions
1.1 Current Transformer Circuits
The secondary circuit of a live CT must not be open circuited. Non-observance of this precaution can result in
injury to personnel or damage to equipment.
1.2 External Resistors
Where external resistors are fitted to the circuit, these may present a danger of electric shock or burns, if touched.
1.3 Fibre Optic Communication
Where fibre optic communication ports are fitted, the lasers are Class 1 devices but recommend they should not
be viewed directly. Optical power meters should be used to determine the operation or signal level of the device.
1.4 Front Cover
The front cover provides additional securing of the relay element within the case. The relay cover
should be in place during normal operating conditions.
1.5 Disposal
The Relay should be disposed of in a manner which does not provide a threat to health or the environment. All
laws and regulations specific to the country of disposal should be adhered to.
The relays and protection systems manufactured under the Reyrolle brand currently do not come within the scope
of either the European WEEE or RoHS directives as they are equipment making up a fixed installation.
!
!
!
!
!

7SR210 & 7SR220 Description of Operation
Unrestricted ©2018 Siemens Protection Devices Limited Page 9 of 94
Table 1.5-1 Ordering Information – 7SR21 Non-Directional Overcurrent
Product description Variants Order No.
7 S R 2 1 0 - 1 A - 0 A 0
Protection Product Family
Overcurrent - Non Directional
1
Relay Type
0
Case, I/O and Fascia
1)
E6 case, 4 CT, 9 Binary Inputs, 8 Binary Outputs, 8 LEDs
2
E8 case, 4 CT, 19 Binary Inputs, 16 Binary Outputs, 16 LEDs
3
E8 case, 4 CT, 19 Binary Inputs, 16 Binary Outputs, 8 LEDs + 6 keys
4
E12 case, 4 CT, 39 Binary Inputs / 16 Binary Outputs, 32 LEDs
5
E12 case, 4 CT, 39 Binary Inputs / 16 Binary Outputs, 16 LEDs, 12 keys
6
Measuring input
1 A or 5 A, 50 Hz or 60 Hz
1
Auxiliary voltage
PSU Rated: 30 to 220V DC. Binary Input threshold 19V DC (Rated: 24-250V DC)
A
PSU Rated: 30 to 220V DC. Binary Input threshold 88V DC (Rated: 110-250V DC)
B
PSU Rated: 24-250V DC / 100-230V AC. Binary Input threshold 19V DC (Rated: 24-250V DC)
M
PSU Rated: 24-250V DC / 100-230V AC. Binary Input threshold 88V DC (Rated: 110-250V DC)
N
Spare
A
Communication Interface
Standard version - included in all models, USB front port, RS485 rear port
1
Standard version - plus additional rear F/O ST connectors (x2) and IRIG-B
2
Standard version - plus additional rear RS485 and IRIG-B
3
Standard version - plus additional rear RS232 and IRIG-B
4
Standard version - plus additional rear Electrical Ethernet RJ45 (x2)
7
7
Standard version - plus additional rear Optical Ethernet Duplex (x2)
8
7
Protocol
IEC 60870-5-103 and Modbus RTU (user selectable)
1
IEC 60870-5-103 and Modbus RTU and DNP 3.0 (user selectable)
2
IEC 60870-5-103 and Modbus RTU and DNP 3.0 (user selectable) and IEC61850 7-8 7
Spare
0
Protection Function Packages
Standard version - included in all models
C
37 Undercurrent
46BC Broken conductor/load unbalance
46NPS Negative phase sequence overcurrent
49 Thermal overload
50 Instantaneous phase fault overcurrent
50BF Circuit breaker fail
50G/50N
Instantaneous earth fault/SEF
50 AFD Arc Flash Detector
51 Time delayed phase fault overcurrent
51G/51N Time delayed earth fault/SEF
60CTS-I CT supervision
64H High impedance REF
74TC/CCS Trip & close circuit supervision
81HBL2 Inrush Detector
81HBL5 Overfluxing Detector
86
Lockout
Cold load pickup
Programmable logic
CB Control
Standard version - plus
D
79
Autoreclose
Additional Functionality
No additional functionality
A
Spare
0
Export Data
HS: 8536900
ECCN: N
AL: N

7SR210 & 7SR220 Description of Operation
Unrestricted ©2018 Siemens Protection Devices Limited Page 10 of 94
Figure 1.5-1 Functional Diagram of 7SR21 Relay

7SR210 & 7SR220 Description of Operation
Unrestricted ©2018 Siemens Protection Devices Limited Page 11 of 94
GND.
BI 1
+ve
-ve
+ve
-ve
IL1
(IA)
22
24
28
2
4
BI 2
+ve
-ve
6
8
BI 3
+ve
-ve
10
12
IL2
(IB)
IL3
(IC)
I4(IG/ISEF)
13
14
15
16
BI 4
+ve 18
BI 5
+ve 20
BI 6
+ve
-ve
22
25
BI 7
+ve 24
BI 8
+ve 26
BI 9
+ve
-ve
28
27
BO 7 19
17
BO 8 23
21
1A
5A
1
2
3
4
1A
5A
5
6
7
8
1A
5A
9
10
11
12
1A
5A
7SR21
BI 10
+ve
-ve
2
4
BI 11
+ve
-ve
6
8
BI 12
+ve
10
BO 9 3
1
BO 10 7
5
BO 11 11
9
BI 13
+ve
12
BI 14
+ve
14
BI 15
+ve
-ve
16
18
BI 16
20
BI 17
+ve
22
BI 18
+ve
24
BI 19
+ve
-ve
26
28
+ve
BO 12 15
13
21
19
17
BO 13
BO 14
27
25
23
BO 15
BO 16
A
B
C
A
Screen
B
Term.
14
16
18
20
Rear View
Arrangement of terminals and modules
Shows contacts internal to relay case
assembly.
Contacts close when the relay chassis is
withdrawn from case
NOTES
BI = Binary Input
BO = Binary Output
BO 1
BO 2
9
5
7
BO 3
BO 4
BO 5
BO 6
27
3
1
15
11
13
19
17
23
21
25
26
A
Analogue
B
PSU
C
Optional
I/O
1 2
27 28
1 21 2
27 2827 28
Data
Comms
(Optional)
D
Optional
I/O
1 2
27 28
E
Blank
1 2
27 28
BI 20
+ve
-ve
2
4
BI 21
+ve
-ve
6
8
BI 22
+ve
10
BI 23
+ve
12
BI 24
+ve
14
BI 25
+ve
-ve
16
18
BI 26
20
BI 27
+ve
22
BI 28
+ve
24
BI 29
+ve
-ve
26
28
+ve
D
BI 30
+ve
-ve
1
3
BI 31
+ve
-ve
5
7
BI 32
+ve 9
BI 33
+ve 11
BI 34
+ve 13
BI 35
+ve
-ve
15
17
BI 36
19
BI 37
+ve 21
BI 38
+ve 23
BI 39
+ve
-ve
25
27
+ve
Figure 1.5-2 Connections Diagram for 7SR21 Relay

7SR210 & 7SR220 Description of Operation
Unrestricted Page 12 of 94 ©2018 Siemens Protection Devices Limited
Table 1.5-2 Ordering Information – 7SR22 Directional Overcurrent
Product description Variants Order No.
7 S R 2 2 0 - 2 A - 0 A 0
Protection Product Family
Overcurrent - Directional
2
Relay Type
0
Case, I/O and Fascia
1)
E6 case, 5 CT, 4 VT, 3 Binary Inputs, 6 Binary Outputs, 8 LEDs
2
C
E8 case, 5 CT, 4 VT, 13 Binary Inputs, 14 Binary Outputs, 16 LEDs
3
E8 case, 5 CT, 4 VT, 13 Binary Inputs, 14 Binary Outputs, 8 LEDs + 6 keys
4
E12 case, 5 CT, 4 VT, 33 Binary Inputs / 14 Binary Outputs, 32 LEDs
5
E12 case, 5 CT, 4 VT, 33 Binary Inputs / 14 Binary Outputs, 16 LEDs, 12 keys
6
Measuring input
1 A or 5 A, 40 V to 160 V, 50 Hz or 60 Hz
2
Auxiliary voltage
PSU Rated: 30 to 220V DC. Binary Input threshold 19V DC (Rated: 24-250V DC)
A
PSU Rated: 30 to 220V DC. Binary Input threshold 88V DC (Rated: 110-250V DC)
B
PSU Rated: 24-250V DC / 100-230V AC. Binary Input threshold 19V DC (Rated: 24-250V DC)
M
PSU Rated: 24-250V DC / 100-230V AC. Binary Input threshold 88V DC (Rated: 110-250V DC)
N
Spare
A
Communication Interface
Standard version - included in all models, USB front port, RS485 rear port
1
Standard version - plus additional rear F/O ST connectors (x2) and IRIG-B
2
Standard version - plus additional rear RS485 and IRIG-B
3
Standard version - plus additional rear RS232 and IRIG-B
4
Standard version - plus additional rear Electrical Ethernet RJ45 (x2)
7
7
Standard version - plus additional rear Optical Ethernet Duplex (x2)
8
7
Protocol
IEC 60870-5-103 and Modbus RTU (user selectable)
1
IEC 60870-5-103 and Modbus RTU and DNP 3.0 (user selectable)
2
IEC 60870-5-103 and Modbus RTU and DNP 3.0 (user selectable) and IEC61850 7-8 7
Spare
0
Protection Function Packages
Standard version - included in all models
C
21FL Fault Locator
21LB Load Blinder
27/59
1)
Under/overvoltage
32 Power
32S Sensitive Power
37 Undercurrent
37G
1)
Ground Undercurrent
37SEF
1)
SEF Undercurrent
46BC Broken conductor/load unbalance
46NPS Negative phase sequence overcurrent
47
1)
Negative phase sequence voltage
49 Thermal overload
50 Instantaneous phase fault overcurrent
50BF Circuit breaker fail
50G/50N Instantaneous earth fault
50 AFD Arc Flash Detector
51V Voltage dependent overcurrent
55 Power factor
59N Neutral voltage displacement
60CTS CT supervision
60CTS-I CT supervision
60VTS VT supervision
64H High impedance REF
67/50 Directional instantaneous phase fault overcurrent
67/50G
67/50N
Directional instantaneous earth fault/SEF
67/51 Directional time delayed phase fault overcurrent
67/51G
67/51N
Directional tIme delayed earth fault/SEF
74TC/CCS Trip & close circuit supervision
81 Under/overfrequency
81HBL2 Inrush Detector
81HBL5 Overfluxing
86
Lockout
Cold load pickup
Programmable logic
CB Control
Standard version - plus
D
79
Autoreclose
Standard version - plus
E
79 + 25
Additional Functionality
No additional functionality
A
Spare
0
Export Data
HS: 8536900
ECCN: N
AL: N
1) 5CT is configured as 3PF + EF/SEF + EF/SEF (user selectable setting).
Autoreclose + Check Sync

7SR210 & 7SR220 Description of Operation
Unrestricted ©2018 Siemens Protection Devices Limited Page 13 of 94
7SR22
46
BC
46
NPS
(x2)
37
(x2) 49 50 BF
VL1
(VA)
VL2
(VB)
VL3
(VC)
V4
(VX)
IL1
(IA)
81
HBL
2/5
37
(x2) 49 50 BF
IL2
(IB)
81
HBL
2/5
37
(x2) 49 50 BF
IL3
(IC)
81
HBL
2/5
60
CTS
I4
(IG)
I5
(ISEF)
74
TCS
NOTE: The use of some
functions are mutually exclusive
67/
50/51
(x4)
67/
50/51N
(x4)
67/
50/51
(x4)
67/
50/51
(x4)
67/
50/51G
(x4)
67/
50/51S
(x4)
64
H
27
59
27
59
(x4)
27
59
(x4)
27
59
(x4)
47
(x2)
81
(x6)
79 Optional
59N
(x2)
81
HBL
2/5N
37G
(x2)
37S
(x2)
51c
60
CTS-
I
60
CTS-
I
60
CTS-
I
37 50
BF
37 50
BF
25
50
AFD
50
AFD
50
AFD
51c
51c
51c
32S32 55
21
LB
21
LB
21
LB
51V
21FL
60
VTS
51V
51V
Figure 1.5-3 Functional Diagram of 7SR22 Relay

7SR210 & 7SR220 Description of Operation
Unrestricted Page 14 of 94 ©2018 Siemens Protection Devices Limited
7SR22
GND.
BI 1
+ve
-ve
+ve
-ve
IL1
(IA)
22
24
28
2
4
BI 2
+ve
-ve
6
8
BI 3
+ve
-ve
10
12
1
2
5
6
9
10
13
14
A
17
18
19
20
VL1
(VA)
21
22
VL2
(VB)
23
24
VL3
(VC)
25
26
V4
(VX)
27
28
BI 4
+ve
-ve
2
4
BI 5
+ve
-ve
6
8
BI 6
+ve
10
BO 7
BO 8
BO 9
BI 7
+ve
12
BI 8
+ve
14
BI 9
+ve
-ve
16
18
BI 10
20
BI 11
+ve
22
BI 12
+ve
24
BI 13
+ve
-ve
26
28
+ve
BO 10
BO 11
BO 12
BO 13
BO 14
1A
5A
1A
5A
IL2
(IB)
1A
5A
IL3
(IC)
1A
5A
I4
(IG)
15
16
11
12
1A
5A
I5
(ISEF)
3
4
7
8
A
Analogue
B
PSU
C
Optional
I/O
1 2
27 28
1 21 2
27 2827 28
Data
Comms
(Optional)
Rear View
Arrangement of terminals and modules
B
C
A
Screen
B
Term.
14
16
18
20
Shows contacts internal to relay case
assembly.
Contacts close when the relay chassis is
withdrawn from case
NOTES
BI = Binary Input
BO = Binary Output
21
19
17
23
25
27
3
1
7
5
11
9
15
13
BO 1
BO 2
9
5
7
BO 3
BO 4
BO 5
BO 6
27
3
1
15
11
13
19
17
23
21
25
26
D
Optional
I/O
1 2
27 28
E
Blank
1 2
27 28
BI 14
+ve
-ve
2
4
BI 15
+ve
-ve
6
8
BI 16
+ve
10
BI 17
+ve
12
BI 18
+ve
14
BI 19
+ve
-ve
16
18
BI 20
20
BI 21
+ve
22
BI 22
+ve
24
BI 23
+ve
-ve
26
28
+ve
D
BI 24
+ve
-ve
1
3
BI 25
+ve
-ve
5
7
BI 26
+ve 9
BI 27
+ve 11
BI 28
+ve 13
BI 29
+ve
-ve
15
17
BI 30
19
BI 31
+ve 21
BI 32
+ve 23
BI 33
+ve
-ve
25
27
+ve
Figure 1.5-4 Connection Diagram for 7SR22 Relay

7SR210 & 7SR220 Description of Operation
Unrestricted ©2018 Siemens Protection Devices Limited Page 15 of 94
Section 2: Hardware Description
2.1 General
The structure of the relay is based upon the Multi-function hardware platform. The relays are supplied in either
size E6 or size E8 cases (where 1 x E = width of 26 mm). The hardware design provides commonality between
products and components across the Multi-function range of relays.
Table 2.1-1 Summary of Overcurrent Relay Configurations
Relay Current
Inputs
Voltage
Inputs
Binary
Inputs
Output
Relays
LEDs Function
Keys
Case
7SR2102 4 9 8 8 E6
7SR2103 4 19 16 16 E8
7SR2104 4 19 16 8 6 E8
7SR2105 4 39 16 32 E12
7SR2106 4 39 16 16 12 E12
7SR2202 5 4 3 6 8 E6
7SR2203 5 4 13 14 16 E8
7SR2204 5 4 13 14 8 6 E8
7SR2205 5 4 33 14 32 E12
7SR2206 5 4 33 14 16 12 E12
Relays are assembled from the following modules: -
1. Front Fascia with three fixed function LEDs and ordering options of configurable LEDs/Function Keys.
2. Processor module
3. Analogue Input module, either
·4 x Current + 6 x Binary Inputs + 2 x Binary Outputs (7SR21), or
·5 x Current + 4 x Voltage (7SR22).
4. Power Supply and 3 x Binary Inputs (BI) and 6 x Binary Outputs (BO).
5. Optional Binary Input/Output Module
·10 x Binary Inputs + 8 x Binary Outputs
·20 x Binary Inputs
6. Optional Communications Module (2x rear fibre optic + 1x IRIG-B ports), (1x rear RS485 + 1x IRIG-B
port), (1x rear RS232 + 1x IRIG-B port), (2x Electrical Ethernet for IEC 61850), (2x Optical Ethernet for
IEC 61850).

7SR210 & 7SR220 Description of Operation
Unrestricted Page 16 of 94 ©2018 Siemens Protection Devices Limited
2.2 Case
The relays are housed in cases designed to fit directly into standard panel racks. The three case options have
widths of 156 mm (E6), 208 mm (E8) and 304 mm (E12), with a height of 177 mm (4U). The required panel depth
(with wiring clearance) is 242 mm. An additional 75 mm depth clearance should be allowed to accommodate the
bending radius of fibre optic data communications cables if fitted. Relays with IEC 61850 communications option
require a depth of 261.5 mm to allow for the communication module and a clearance from devices fitted below the
relay of 75 mm to accommodate fitment of the Ethernet cables.
The complete relay assembly is withdrawable from the front of the case. Contacts in the case ensure that the CT
circuits remain short-circuited when the relay is removed. For the IEC 61850 variant options the rear retaining
screw must be re-fitted following re-insertion to ensure relay performance claims.
The rear terminal blocks comprise M4 female terminals for wire connections. Each terminal can accept two 4 mm
crimps. Located at the top rear of the case is a screw-clamp earthing point, this must be connected to the main
panel earth.
2.3 Front Cover
With the transparent front cover in place the user only has access to the ▼and TEST/RESET►buttons, via blue
push buttons, allowing all areas of the menu system to be viewed, but preventing setting changes and control
actions. The only ‘action’ that is permitted is to reset the Fault Data display, latched binary outputs and LEDs by
using the TEST/RESET 4button. The front cover is used to secure the relay assembly in the case.
2.4 Power Supply Unit (PSU)
The relay PSU can be directly connected to any substation dc system rated from 24 V dc to 250 V dc / 100 V ac
to 230 V ac.
In the event of the station battery voltage level falling below the relay minimum operating level, the PSU will
automatically switch itself off and latch out – this prevents any PSU overload conditions occurring. The PSU is
reset by switching the auxiliary supply off and on.
Typically the PSU is connected to the auxiliary supply via an external HRC fuse rated at 6A (BS88/IEC60259).
Isolation links may also be installed in accordance with user requirements.
2.5 Operator Interface/ Fascia
The operator interface is designed to provide a user-friendly method of controlling, entering settings and retrieving
data from the relay.
The warning and information labels on the relay fascia provide the following information: -
Dielectric Test Voltage 2kV
Impulse Test Above 5kV
Caution: Risk of Electric Shock
Caution: Refer to Equipment Documentation