Siemens Argus 7SR22 Technical 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.

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

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.

7SR210 Non-Directional Relay

7SR220 Directional Relay

Description Of Operation

7SR210 & 7SR220 Description of Operation

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

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

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 I

2

t 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

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

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

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

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

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

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

Figure 1.5-1 Functional Diagram of 7SR21 Relay

7SR210 & 7SR220 Description of Operation

GND.

BI 1

+ve

-ve

+ve

-ve

I

L1

(I

A

)

22

24

28

2

4

BI 2

+ve

-ve

6

8

BI 3

+ve

-ve

10

12

I

L2

(I

B

)

I

L3

(I

C

)

I

4

(I

G

/I

SEF

)

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

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

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

7SR22

46

BC

46

NPS

(x2)

37

(x2)

49

50

BF

V

L1

(V

A

)

V

L2

(V

B

)

V

L3

(V

C

)

V

4

(V

X

)

I

L1

(I

A

)

81

HBL

2/5

37

(x2)

49

50

BF

I

L2

(I

B

)

81

HBL

2/5

37

(x2)

49

50

BF

I

L3

(I

C

)

81

HBL

2/5

60

CTS

I

4

(I

G

)

I

5

(I

SEF

)

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

32S32

55

21

LB

21

LB

21

LB

51V

21FL

60

VTS

51V

Figure 1.5-3 Functional Diagram of 7SR22 Relay

7SR210 & 7SR220 Description of Operation

7SR22

GND.

BI 1

+ve

-ve

+ve

-ve

I

L1

(I

A

)

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

V

L1

(V

A

)

21

22

V

L2

(V

B

)

23

24

V

L3

(V

C

)

25

26

V

4

(V

X

)

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

I

L2

(I

B

)

1A

5A

I

L3

(I

C

)

1A

5A

I

4

(I

G

)

15

16

11

12

1A

5A

I

5

(I

SEF

)

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

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

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 4 button. 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

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