Siemens 7SR18 Solkor User manual

Energy Management
7SR18 Solkor
Line Differential Relay
Reyrolle
Protection
Devices

Siemens Protection Devices Limited 2

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.
© 2016 Siemens Protection Devices Limited
Contents
Technical Manual Sections
1. Description of Operation
2. Configuration Guide
3. Installation Guide
4. Performance Specification
5. Instrumentation Guide
6. Settings Guide
7. Data Communications Definitions
8. Commissioning and Maintenance Guide
9. Applications Guide

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
7SR18 Line Differential Protection
Description of Operation

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Document Release History
This document is issue 2018/07
2016/11 First Issue
2017/05 Typographical revisions, amended drawings.
2017/11 Typographical revisions, added data.
2018/07 Amended connection diagrams, additional disposal information
Software Revision History
2016/11 2436H80016R4d-1b First Release
2018/07 2436H80016R4i-1c Software maintenance to address production SW upload.

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Contents
Document Release History.................................................................................................................................2
Software Revision History..................................................................................................................................2
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
Section 2: Hardware Description......................................................................................................................16
2.1 General...........................................................................................................................................16
2.2 Case...............................................................................................................................................17
2.3 Front Cover.....................................................................................................................................18
2.4 Power Supply Unit (PSU).................................................................................................................19
2.5 Operator Interface/ Fascia................................................................................................................19
2.6 Current Inputs..................................................................................................................................23
2.7 Voltage Inputs .................................................................................................................................23
2.8 Binary Inputs...................................................................................................................................23
2.9 Binary Outputs (Output Contacts).....................................................................................................24
2.10 Virtual Input/Output Connections......................................................................................................25
2.11 Self Monitoring ................................................................................................................................26
2.11.1 Protection Healthy/Defective...............................................................................................27
Section 3: Protection Functions........................................................................................................................28
3.1 Differential Protection.......................................................................................................................28
3.1.1 Overall Biased Differential (87L-n) ......................................................................................28
3.1.2 Differential Highset (87HS-n)..............................................................................................30
3.1.3 Protection Communication Signalling Supervision...............................................................31
3.2 Inter-Trip Elements..........................................................................................................................31
3.2.1 Internal Inter-Trip Elements (87R-n)....................................................................................31
3.2.2 External Inter-Trip Elements (85S-n, 85R-n)........................................................................31
3.3 Current Protection: PhaseOvercurrent (67, 50, 51)...........................................................................32
3.3.1 Directional Control of Overcurrent Protection (67)................................................................32
3.3.2 Instantaneous Overcurrent Protection (50)..........................................................................33
3.3.3 Time Delayed Overcurrent Protection (51) ..........................................................................35
3.3.4 Voltage Controlled Overcurrent (51V) .................................................................................37
3.4 Current Protection: Derived Earth Fault (67N, 51N, 50N)...................................................................38
3.4.1 Directional Control of Derived Easrth Fault Protection (67N)................................................38
3.4.2 Instantaneous Derived Earth Fault Protection (50N)............................................................39
3.4.3 Time Delayed Derived Earth Fault Protection (51N).............................................................40
3.5 Current Protection: Measured Earth Fault (67G, 51G, 50G)...............................................................41
3.5.1 Directional Control of Measured Earth Fault Protection (67G)..............................................41
3.5.2 Instantaneous Measured Earth Fault Protection (50G).........................................................42
3.5.3 Time Delayed Measured Earth Fault Protection (51G).........................................................43
3.6 Current Protection: Cold Load (51c) .................................................................................................44
3.7 Current Protection: Negative Phase Sequence Overcurrent - (46NPS)..............................................45
3.8 Current Protection: Under-Current (37 & 37G)..................................................................................46
3.9 Current Protection: Thermal Overload (49).......................................................................................47
3.10 Current Protection: Line Check 50LC, 50G LC..................................................................................48
Section 4: Control & Logic Functions................................................................................................................49
4.1 Auto-Reclose (79)............................................................................................................................49
4.1.1 Overview............................................................................................................................49
4.1.2 Auto Reclose sequences....................................................................................................51
4.2 Autoreclose Prot’n Menu..................................................................................................................52
4.3 Autoreclose Config Menu.................................................................................................................52
4.4 P/F Shots Sub-Menu........................................................................................................................54

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4.5 E/F Shots Sub-Menu....................................................................................................................... 54
4.6 Extern Shots Sub-Menu .................................................................................................................. 55
4.7 Manual CB Control.......................................................................................................................... 57
4.8 Circuit Breaker................................................................................................................................ 58
4.9 Quick Logic..................................................................................................................................... 60
Section 5: Supervision Functions..................................................................................................................... 62
5.1 Circuit Breaker Failure (50BF)......................................................................................................... 62
5.2 VT Supervision (60VTS).................................................................................................................. 63
5.3 CT Supervision (60CTS-I & CTS) .................................................................................................... 65
5.3.1 60CTS-I ............................................................................................................................ 65
5.3.2 60CTS............................................................................................................................... 66
5.4 Broken Conductor (46BC)............................................................................................................... 67
5.5 Trip/ Close Circuit Supervision (74TCS & 74CCS)........................................................................... 68
5.6 2nd Harmonic Block/Inrush Restraint (81HBL2) phase elements only............................................... 69
Section 6: Other Features................................................................................................................................ 70
6.1 Data Communications..................................................................................................................... 70
6.2 IEC 61850 Communications............................................................................................................ 70
6.3 Maintenance................................................................................................................................... 71
6.3.1 Output Matrix Test............................................................................................................. 71
6.3.2 CB Counters...................................................................................................................... 71
6.3.3 I2t CB Wear ....................................................................................................................... 71
6.3.4 Start Count........................................................................................................................ 71
6.4 Data Storage................................................................................................................................... 72
6.4.1 General............................................................................................................................. 72
6.4.2 Demand............................................................................................................................ 72
6.4.3 Event Records................................................................................................................... 72
6.4.4 Waveform Records............................................................................................................ 72
6.4.5 Fault Records.................................................................................................................... 73
6.4.6 Disk Activity Warning......................................................................................................... 73
6.4.7 Energy Storage ................................................................................................................. 74
6.5 Metering ......................................................................................................................................... 75
6.6 Operating Mode.............................................................................................................................. 76
6.7 Control Mode.................................................................................................................................. 76
6.8 Real TimeClock.............................................................................................................................. 77
6.8.1 Time Synchronisation – Data Communication Interface....................................................... 77
6.8.2 Time Synchronisation – Binary Input .................................................................................. 77
6.9 Settings Groups.............................................................................................................................. 77
6.10 Password Feature........................................................................................................................... 78

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List of Figures
Figure 1.4-1 Functional Diagram of 7SR18 Non-Directional Three-Phase and Earth ..........................................10
Figure 1.4-2 Connections Diagram for 7SR18 Non-Directional Relay (3BI and 5BO)..........................................11
Figure 1.4-3 Connections Diagram for 7SR18 Non-Directional Relay (6BI and 8BO)..........................................12
Figure 1.4-4 Functional Diagram of 7SR18 Directional Three-Phase and Earth..................................................13
Figure 1.4-5 Connections Diagram for 7SR18 Directional Relay (3BI and 5BO) .................................................14
Figure 1.4-6 Connections Diagram for 7SR18 Directional Relay (6BI and 8BO) .................................................15
Figure 2.2-1 Front View of Relay......................................................................................................................17
Figure 2.2-2 Rear view of Relay.......................................................................................................................17
Figure 2.2-3 Earth connection Symbol..............................................................................................................17
Figure 2.3-1 Relay with transparent cover.........................................................................................................18
Figure 2.5-1 Relay with Transparent cover removed .........................................................................................19
Figure 2.5-2 Close up of Typical Relay Label....................................................................................................20
Figure 2.5-3 Typical Relay Identifier LCD Text..................................................................................................21
Figure 2.5-4 LED Indication Label ....................................................................................................................22
Figure 2.8-1 Binary Input Logic.........................................................................................................................24
Figure 2.9-1 Binary Output Logic......................................................................................................................25
Figure 2.11-1 Start-up Counter Meter...............................................................................................................26
Figure 2.11-2 Unexpected Restarts Lockout Text..............................................................................................26
Figure 2.11-3 Typical Start-up Events Text .......................................................................................................27
Figure 3.1.1-1 Biased Differential Characteristic (Offset Disabled).....................................................................28
Figure 3.1.1-2 Biased Differential Characteristic (Offset Enabled - Default)........................................................29
Figure 3.1.1-3 Logic Diagram: Biased Current Differential Protection.................................................................29
Figure 3.1.2-1 Differential Highset Characteristic...............................................................................................30
Figure 3.1.2-2 Logic Diagram: Differential High Set Current Protection..............................................................30
Figure 3.1.3-1 Logic Diagram: Protection Communications Signalling Supervision.............................................31
Figure 3.3.1-1 Logic Diagram: Directional Overcurrent Element (67)..................................................................33
Figure 3.3.2-1 Logic Diagram: Instantaneous Over-current Element..................................................................34
Figure 3.3.3-1 Logic Diagram: Time Delayed Overcurrent Element....................................................................36
Figure 3.3.4-1 Logic Diagram: Voltage Controlled Overcurrent Element.............................................................37
Figure 3.4.1-1 Logic Diagram: Derived Directional Earth Fault Protection...........................................................38
Figure 3.4.2-1 Logic Diagram: Derived Instantaneous Earth Fault Element........................................................39
Figure 3.4.3-1 Logic Diagram: Derived Time Delayed Earth Fault Element........................................................40
Figure 3.5.1-1 Logic Diagram: Measured Earth Fault Protection........................................................................41
Figure 3.5.2-1 Logic Diagram: Measured Instantaneous Earth-fault Element......................................................42
Figure 3.5.3-1 Logic Diagram: Measured Time Delayed Earth Fault Element (51G) ...........................................43
Figure 3.6-1 Logic Diagram: Cold Load Settings (51c).......................................................................................44
Figure 3.7-1 Logic Diagram: Negative Phase Sequence Overcurrent (46NPS)...................................................45
Figure 3.8-1 Logic Diagram: Phase Current Inputs Undercurrent Detector (37)..................................................46
Figure 3.8-2 Logic Diagram: Earth Current Inputs Undercurrent Detector (37G).................................................46
Figure 3.9-1 Logic Diagram: Thermal Overload Protection (49)..........................................................................48
Figure 3.10-1 Logic Diagram: 50G Line Check Elements (50G LC)....................................................................48
Figure 3.10-2 Logic Diagram: 50 Line Check Elements (50LC)..........................................................................48
Figure 4.1.2-1 Typical Sequence with 3 Instantaneous and 1 Delayed trip.........................................................51
Figure 4.6-1 Basic Auto-Reclose Sequence Diagram........................................................................................56
Figure 4.8-1 Logic Diagram: Circuit Breaker Status...........................................................................................59
Figure 4.9-1 Sequence Diagram: Quick Logic PU/DO Timers (Counter Reset Mode Off)....................................61
Figure 5.1-1 Logic Diagram: Circuit Breaker Fail Protection (50BF) ...................................................................62
Figure 5.2-1 Logic Diagram: Circuit Breaker Fail Protection (50BF) ...................................................................64
Figure 5.3.1-1 Logic Diagram: CT Supervision Function (60CTS-I)....................................................................65
Figure 5.3.2-1 Logic Diagram: CT Supervision Function (60CTS)......................................................................66

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Figure 5.4-1 Logic Diagram: Broken Conductor Function(46BC)...................................................................... 67
Figure 5.5-1 Logic Diagram: Trip Circuit Supervision Feature (74TCS).............................................................. 68
Figure 5.5-2 Logic Diagram: Close Circuit Supervision Feature (74CCS)........................................................... 68
Figure 5.6-1 Functional Diagram for Harmonic Block Feature (81HBL2)............................................................ 69
Figure 6.4.7-1Energy Direction Convention...................................................................................................... 74

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List of Tables
Table 1.4-1 7SR18 Ordering Options ..............................................................................................................9
Table 2.1-1 Summary of 7SR18 Relay Configuration.....................................................................................16
Table 2.4-1 Power Supply Unit (PSU) options................................................................................................19
Table 6.6-1 Operating Mode.........................................................................................................................76
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]

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Section 1: Introduction
This manual is applicable to the following relays: -
7SR18 Line Differential Relay
The ‘Ordering Option’ Tables summarise the features available in each model.
General Safety Precautions
It is the responsibility of the user to ensure that the equipment is installed, operated and used for its intended
function in the manner specified by the manufacturer. If this is not the case, then any safety protection provided
by the equipment may be impaired.
The equipment shall be isolated or disconnected from hazardous live voltage before accesses to potentially
hazardous live parts is affected.
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.
!
!
!
!

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Table 1.4-1 7SR18 Ordering Options
7 S R 1 8 1 - -0 A0
Protection Product Family
Differential Protection 8
Case size
E6
2)
1
I/O and Fascia
3 Binary Inputs, 5 Binary Outputs, 18 LEDs 1 C
2 C
6 Binary Inputs, 8 Binary Outputs, 18 LEDs 3
6 Binary Inputs, 8 Binary Outputs, 10 LEDs + (6 keys each with LED) 4
Measuring input
4 CTs (1 A or 5 A) 1
4 CTs (1 A or 5 A), 3 VTs (40 V to 160 V) 2 C
Auxiliary voltage
24 V DC to 250 V DC, 100 V AC to 230 V AC, binary input threshold 19 V DC M
24 V DC to 250 V DC, 100 V AC to 230 V AC, binary input threshold 88 V DC N
Protection Signalling Channel
Optical fibre link (820 nm) (ST connection) 2 km
1)
B
1
Optical fibre link (1300 nm) (LC connection) 40 km
1) C
Data Communication Interface
USB front port, RS485 (Terminal block) rear port 1 2
USB front port, RS485 (Terminal block) rear port, Electrical Ethernet RJ45 (x2) rear port 7 7
USB front port, RS485 (Terminal block) rear port, Optical Ethernet Duplex (x2) rear port 8 7
Protocol
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
Spare 0
Protection Function Packages
Standard version C
87L 3-Phase differential (with variable settings)
87HS 3-Phase Differential High Set
85 Inter-Trip
50 Instantaneous phase fault overcurrent
50G/50N Instantaneous earth fault
51 Time delayed phase fault overcurrent
51G/51N Time delayed earth fault
50LC Line Check
37 Undercurrent
46NPS Negative phase sequence overcurrent
49 Thermal overload
50BF Circuit breaker fail
46BC Broken conductor/load unbalance
60CTS-I CT Supervision
74T&C Trip & Close circuit supervision
51c Cold load pickup
81HBL2 Inrush Detector
Programmable Logic
For variants with 3 x VT inputs as above plus
51V Voltage Controlled Overcurrent
60CTS CT Supervision
60 VTS VT supervision
67/50, 67/51 Directional Overcurrent
67 G/N Directional Earth Fault
Version C - plus D
79 Autoreclose
Additional Functionality
No additional functionality A
Spare 0
3 Binary Inputs, 5 Binary Outputs, 10 LEDs + (6 keys each with LED)
1) Refer to Technical Manual
2)
Standard Version Cover - No Push Buttons

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37 (x2) 49 50
BF
IL1
37 (x2) 49 50
BF
IL2
37 (x2) 49 50
BF
IL3
I4
50
(x2) 51 (x2)
50
(x2)
50
(x2)
51
(x2)
51
(x2)
50G
(x2) 51G (x2)
50 BF
NOTE: The use of
some functions are
mutually exclusive
81HBL2
37G (x2)
87L
Diff (x2)
87L
Diff (x2)
87L
Diff (x2)
81HBL2
60
CTS
51N
(x2)
50N
(x2)
51c (x2)
46
NPS
(x2)
46
BC
81HBL2
81HBL2
51c (x2)
51c (x2)
74TCS
(x3) 74CCS (x3)
86 79 Ordering Options
Figure 1.4-1 Functional Diagram of 7SR18 Non-Directional Three-Phase and Earth

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Figure 1.4-2 Connections Diagram for 7SR18 Non-Directional Relay (3BI and 5BO)

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Figure 1.4-3 Connections Diagram for 7SR18 Non-Directional Relay (6BI and 8BO)

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46
BC
46
NPS
(x2)
37 (x2) 49 50
BF
VL1
VL2
VL3
IL1
37 (x2) 49 50
BF
IL2
37 (x2) 49 50
BF
IL3
60
CTS
I4
NOTE: The use of
some functions are
mutually exclusive
67/
50
(x4)
67/
51
(x4)
67/
50N
(x4)
67/
50
(x4)
67/
50
(x4)
67/
51
(x4)
67/
51
(x4)
67/
51N
(x4)
67/
50G
(x4)
67/
51G
(x4)
50 BF
51V
51V
51V
51c (x4)
81HBL2
81HBL237G (x2)
60
VTS
87L
Diff (x2)
87L
Diff (x2)
87L
Diff (x2)
79 Ordering Options
74TCS
(x3)
74CCS
(x3)
86
81HBL2
81HBL2
51c (x4)
51c (x4)
Figure 1.4-4 Functional Diagram of 7SR18 Directional Three-Phase and Earth

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Figure 1.4-5 Connections Diagram for 7SR18 Directional Relay (3BI and 5BO)

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Figure 1.4-6 Connections Diagram for 7SR18 Directional Relay (6BI and 8BO)

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Section 2: Hardware Description
2.1 General
The structure of the relays is based upon the Reyrolle Compact (RC) hardware platform. They are supplied in a
size E6 case (where 1 x E = width of approx. 26 mm). The hardware design provides commonality between
products and components across the Reyrolle Compact range of relays.
Table 2.1-1 Summary of 7SR18 Relay Configuration
Relay
Current
Inputs
Voltage
Inputs
Binary
Inputs
Binary
Outputs
LEDs
(Individual)
Function
Keys (each
with LED)
7SR1811-1 4 - 3 5 18 0
7SR1812-1 4 - 3 5 10 6
7SR1813-1 4 - 6 8 18 0
7SR1814-1 4 - 6 8 10 6
7SR1811-2 4 3 3 5 18 0
7SR1812-2 4 3 3 5 10 6
7SR1813-2 4 3 6 8 18 0
7SR1814-2 4 3 6 8 10 6
Relays are assembled from the following PCBs:
1) Front Fascia (order option)
CPU
9 configurable LEDs + 1 Relay Healthy LED plus 8 configurable LEDs (Option)
9 configurable LEDs + 1 Relay Healthy LED plus 6 Function Keys each with LED (Option)
2) Current Analogue / Output module
4 x Current + 5 x Binary Output (BO)
3) Voltage Analogue / Input / output module
3 x Voltage Transformer (VT) (Option)
3 x Binary Input (BI) + 3 x Binary Output (BO) (Option)
3 x Voltage Transformer (VT) + 3 x Binary Input (BI) + 3 x Binary Output (BO) (Option)
4) Power Supply
3 x Binary Input (BI) + RS485
5) Protection Signalling module
6) Communications Module (2x Electrical Ethernet for IEC 61850) or (2x Optical Ethernet for IEC 61850) (Option)

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2.2 Case
The relays are housed in cases designed to fit directly into standard panel racks. The case has a width of 156 mm
and a height of 177mm (4U). The required panel depth (with wiring clearance) is 287 mm.
The complete relay assembly is withdrawable from the front of the case. Contacts in the case ensure that the CT
circuits and normally closed contacts remain short-circuited when the relay is removed. To withdraw the relay,
remove the plastic fascia cover by rotating the two securing pins and withdraw using the plastic handles. The
relay should not be carried using these handles. The relay should only be held by the top and bottom plates and
the user should not touch the exposed PCB’s.
Figure 2.2-1 Front View of Relay
The rear terminal blocks comprise M4 female terminals for wire connections. Each terminal can accept two 4 mm
crimps.
Figure 2.2-2 Rear view of Relay
Located at the top rear of the case is a screw clamp earthing point, this must be connected to terminal B28 and
directly to the main panel earth. This connection point is indicated by the following symbol.
Figure 2.2-3 Earth connection Symbol