Siemens SIPROTEC 4, SIPROTEC 7SJ80 User Manual

Preface

Open Source Software

Table of Contents

SIPROTEC 4
Overcurrent Time Protec-

tion 7SJ80

V4.7

Manual

Introduction

Functions

Mounting and Commissioning

Technical Data

Ordering Information and Accessories

Terminal Assignments

Connection Examples

Current Transformer Requirements
Default Settings and Protocol-dependent

Functions

1
2
3
4

A

B

C

D

E

E50417-G1140-C343-A8

Functions, Settings, Information

Literature

Glossary

Index

F

i

i

NOTE

For your own safety, observe the warnings and safety instructions contained in this document, if available.

Disclaimer of Liability

This document has been subjected to rigorous technical
review before being published. It is revised at regular inter­vals, and any modifications and amendments are included
in the subsequent issues. The content of this document has
been compiled for information purposes only. Although
Siemens AG has made best efforts to keep the document as
precise and up-to-date as possible, Siemens AG shall not
assume any liability for defects and damage which result
through use of the information contained herein.

This content does not form part of a contract or of business
relations; nor does it change these. All obligations of
Siemens AG are stated in the relevant contractual agree­ments.

Siemens AG reserves the right to revise this document from
time to time.

Document version: E50417-G1140-C343-A8.00
Edition: 12.2017
Version of the product described: V4.7

Copyright

Copyright © Siemens AG 2017. All rights reserved.
The disclosure, duplication, distribution and editing of this

document, or utilization and communication of the content
are not permitted, unless authorized in writing. All rights,
including rights created by patent grant or registration of a
utility model or a design, are reserved.

Registered Trademarks

SIPROTEC®, DIGSI®, SIGUARD®, SIMEAS®, and SICAM® are
registered trademarks of Siemens AG. Any unauthorized
use is illegal. All other designations in this document can
be trademarks whose use by third parties for their own
purposes can infringe the rights of the owner.

Preface

Purpose of the Manual

This manual describes the functions, operation, installation, and commissioning of devices 7SJ80. In partic­ular, one will find:

Information regarding the configuration of the scope of the device and a description of the device func-

•

tions and settings → Chapter 2;

Instructions for Installation and Commissioning → Chapter 3;

•

Compilation of the Technical Data → Chapter 4;

•

As well as a compilation of the most significant data for advanced users → Appendix.

•

General information with regard to design, configuration, and operation of SIPROTEC 4 devices are set out in
the SIPROTEC 4 System Description /1/ SIPROTEC 4 System Description.

Target Audience

Protection-system engineers, commissioning engineers, persons entrusted with the setting, testing and main­tenance of selective protection, automation and control equipment, and operating personnel in electrical
installations and power plants.

Scope

This manual applies to: SIPROTEC 4 Overcurrent Time Protection 7SJ80; Firmware-Version V4.7.

Indication of Conformity

Additional Standards IEEE Std C37.90 (see Chapter 4 "Technical Data")

This product is UL-certified according to the Technical Data. file E194016

[ul-schutz-7sx80-100310, 1, --_--]

This product complies with the directive of the Council of the European Communities on the
approximation of the laws of the Member States relating to electromagnetic compatibility
(EMC Council Directive 2004/108/EC) and concerning electrical equipment for use within
specified voltage limits (Low-voltage Directive 2006/95 EC).

This conformity is proved by tests conducted by Siemens AG in accordance with the Council
Directive in agreement with the generic standards EN 61000-6-2 and EN 61000-6-4 for EMC
directive, and with the standard EN 60255-27 for the low-voltage directive.

The device has been designed and produced for industrial use.
The product conforms with the international standards of the series IEC 60255 and the

German standard VDE 0435.

SIPROTEC 4, 7SJ80, Manual
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3

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Preface

Additional Support

For questions about the system, please contact your Siemens sales partner.

Support

Our Customer Support Center provides a 24-hour service.

Phone: [phone]
Fax: [phone]
E-Mail: [e-mail]

Training Courses

Inquiries regarding individual training courses should be addressed to our Training Center:

Siemens AG
Siemens Power Academy TD

Humboldtstraße 59
90459 Nürnberg
Germany

Phone: [phone]
Fax: [phone]
E-Mail: [e-mail]
Internet: www.siemens.com/poweracademy

Notes on Safety

This document is not a complete index of all safety measures required for operation of the equipment (module
or device). However, it comprises important information that must be followed for personal safety, as well as
to avoid material damage. Information is highlighted and illustrated as follows according to the degree of
danger:

DANGER

DANGER means that death or severe injury will result if the measures specified are not taken.

²

WARNING

WARNING means that death or severe injury may result if the measures specified are not taken.

²

CAUTION

Comply with all instructions, in order to avoid death or severe injuries.

Comply with all instructions, in order to avoid death or severe injuries.

CAUTION means that medium-severe or slight injuries can occur if the specified measures are not taken.

Comply with all instructions, in order to avoid moderate or minor injuries.

²

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NOTICE

i

i

NOTICE means that property damage can result if the measures specified are not taken.

Comply with all instructions, in order to avoid property damage.

²

NOTE

Important information about the product, product handling or a certain section of the documentation
which must be given particular attention.

Qualified Electrical Engineering Personnel

Only qualified electrical engineering personnel may commission and operate the equipment (module, device)
described in this document. Qualified electrical engineering personnel in the sense of this manual are people
who can demonstrate technical qualifications as electrical technicians. These persons may commission,
isolate, ground and label devices, systems and circuits according to the standards of safety engineering.

Proper Use

The equipment (device, module) may be used only for such applications as set out in the catalogs and the
technical description, and only in combination with third-party equipment recommended and approved by
Siemens.

Problem-free and safe operation of the product depends on the following:

Proper transport

•

Proper storage, setup and installation

•

Proper operation and maintenance

•

When electrical equipment is operated, hazardous voltages are inevitably present in certain parts. If proper
action is not taken, death, severe injury or property damage can result:

The equipment must be grounded at the grounding terminal before any connections are made.

•

All circuit components connected to the power supply may be subject to dangerous voltage.

•

Hazardous voltages may be present in equipment even after the supply voltage has been disconnected

•

(capacitors can still be charged).

Preface

Operation of equipment with exposed current-transformer circuits is prohibited. Before disconnecting the

•

equipment, ensure that the current-transformer circuits are short-circuited.

The limiting values stated in the document must not be exceeded. This must also be considered during

•

testing and commissioning.

Typographic and Symbol Conventions

The following text formats are used when literal information from the device or to the device appear in the
text flow:

Parameter Names

Designators of configuration or function parameters which may appear word-for-word in the display of the
device or on the screen of a personal computer (with operation software DIGSI), are marked in bold letters in
monospace type style. The same applies to titles of menus.

1234A

Parameter addresses have the same character style as parameter names. Parameter addresses contain the
suffix A in the overview tables if the parameter can only be set in DIGSI via the option Display additional
settings.

Parameter Options

Possible settings of text parameters, which may appear word-for-word in the display of the device or on the
screen of a personal computer (with operation software DIGSI), are additionally written in italics. The same
applies to the options of the menus.

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Preface

Indications

Designators for information, which may be output by the relay or required from other devices or from the
switch gear, are marked in a monospace type style in quotation marks.

Deviations may be permitted in drawings and tables when the type of designator can be obviously derived
from the illustration.

The following symbols are used in drawings:

Device-internal logical input signal

Device-internal logical output signal

Internal input signal of an analog quantity

External binary input signal with number (binary input,
input indication)
External binary output signal with number
(example of a value indication)

External binary output signal with number (device indication) used as
input signal

Example of a parameter switch designated FUNCTION with address
1234 and the possible settings ON and OFF

Besides these, graphical symbols are used in accordance with IEC 60617-12 and IEC 60617-13 or similar.
Some of the most frequently used are listed below:

Analog input variable

AND-gate operation of input values

OR-gate operation of input values

Exclusive OR gate (antivalence): output is active, if only one of the
inputs is active

Coincidence gate: output is active, if both inputs are active or inactive
at the same time

Dynamic inputs (edge-triggered) above with positive, below with
negative edge

Formation of one analog output signal from a number of analog input
signals

Limit stage with setting address and parameter designator (name)

Timer (pickup delay T, example adjustable) with setting address and
parameter designator (name)

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Timer (dropout delay T, example non-adjustable)

Dynamic triggered pulse timer T (monoflop)

Static memory (SR flipflop) with setting input (S), resetting input (R),
output (Q) and inverted output (Q), setting input dominant

Static memory (RS-flipflop) with setting input (S), resetting input (R),
output (Q) and inverted output (Q), resetting input dominant

Preface

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E50417-G1140-C343-A8, Edition 12.2017

Open Source Software

The product contains, among other things, Open Source Software developed by third parties. The Open
Source Software used in the product and the license agreements concerning this software can be found in the
Readme_OSS. These Open Source Software files are protected by copyright. Your compliance with those
license conditions will entitle you to use the Open Source Software as foreseen in the relevant license. In the
event of conflicts between Siemens license conditions and the Open Source Software license conditions, the
Open Source Software conditions shall prevail with respect to the Open Source Software portions of the soft­ware. The Open Source Software is licensed royalty-free. Insofar as the applicable Open Source Software
License Conditions provide for it you can order the source code of the Open Source Software from your
Siemens sales contact - against payment of the shipping and handling charges - for a period of at least 3 years
since purchase of the Product. We are liable for the Product including the Open Source Software contained in
it pursuant to the license conditions applicable to the Product. Any liability for the Open Source Software
beyond the program flow intended for the Product is explicitly excluded. Furthermore any liability for defects
resulting from modifications to the Open Source Software by you or third parties is excluded. We do not
provide any technical support for the Product if it has been modified.

SIPROTEC 4, 7SJ80, Manual
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Table of Contents

Preface..........................................................................................................................................................3

Open Source Software..................................................................................................................................9

1 Introduction................................................................................................................................................19

1.1 Overall Operation..............................................................................................................20

1.2 Application Scope............................................................................................................. 22

1.3 Characteristics.................................................................................................................. 24

2 Functions.................................................................................................................................................... 29

2.1 General.............................................................................................................................30

2.1.1 Functional Scope......................................................................................................... 30

2.1.1.1 Functional Description........................................................................................... 30

2.1.1.2 Setting Notes......................................................................................................... 30

2.1.1.3 Settings................................................................................................................. 32

2.1.2 Device, General Settings.............................................................................................. 34

2.1.2.1 Functional Description........................................................................................... 34

2.1.2.2 Setting Notes......................................................................................................... 34

2.1.2.3 Settings................................................................................................................. 35

2.1.2.4 Information List..................................................................................................... 36

2.1.3 Power System Data 1...................................................................................................37

2.1.3.1 Functional Description........................................................................................... 37

2.1.3.2 Setting Notes......................................................................................................... 38

2.1.3.3 Settings................................................................................................................. 43

2.1.3.4 Information List..................................................................................................... 46

2.1.4 Oscillographic Fault Records........................................................................................ 46

2.1.4.1 Functional Description........................................................................................... 47

2.1.4.2 Setting Notes......................................................................................................... 48

2.1.4.3 Settings................................................................................................................. 48

2.1.4.4 Information List..................................................................................................... 48

2.1.5 Settings Groups........................................................................................................... 49

2.1.5.1 Functional Description........................................................................................... 49

2.1.5.2 Setting Notes......................................................................................................... 49

2.1.5.3 Settings................................................................................................................. 49

2.1.5.4 Information List..................................................................................................... 49

2.1.6 Power System Data 2...................................................................................................50

2.1.6.1 Functional Description........................................................................................... 50

2.1.6.2 Setting Notes......................................................................................................... 50

2.1.6.3 Settings................................................................................................................. 53

2.1.6.4 Information List..................................................................................................... 54

2.1.7 EN100-Module............................................................................................................ 55

2.1.7.1 Functional Description........................................................................................... 55

2.1.7.2 Setting Notes......................................................................................................... 55

2.1.7.3 Information List..................................................................................................... 55

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Table of Contents

2.2 Overcurrent Protection 50, 51, 50N, 51N.......................................................................... 56

2.2.1 General ...................................................................................................................... 56

2.2.2 Definite Time, High-set Elements 50-3, 50-2, 50N-3, 50N-2..........................................57

2.2.3 Definite Time Overcurrent Elements 50-1, 50N-1......................................................... 59

2.2.4 Inverse Time Overcurrent Elements 51, 51N ................................................................62

2.2.5 Inverse Time Overcurrent Protection 51V (Voltage-controlled / Voltagerestraint)...........65

2.2.6 Dynamic Cold Load Pickup Function.............................................................................67

2.2.7 Inrush Restraint .......................................................................................................... 68

2.2.8 Pickup Logic and Tripping Logic................................................................................... 69

2.2.9 Two-phase Overcurrent Protection (Only Non-Directional) ...........................................70

2.2.10 Fast Busbar Protection Using Reverse Interlocking ....................................................... 71

2.2.11 Setting Notes...............................................................................................................72

2.2.12 Settings.......................................................................................................................77

2.2.13 Information List...........................................................................................................79

2.3 Directional Overcurrent Protection 67, 67N....................................................................... 82

2.3.1 General....................................................................................................................... 82

2.3.2 Definite Time Directional High-set Elements 67-2, 67N-2, 67-3, 67N-3......................... 84

2.3.3 Definite Time, Directional Time Overcurrent Elements 67-1, 67N-1...............................85

2.3.4 Inverse Time, Directional Overcurrent Elements 67-TOC, 67N-TOC............................... 88

2.3.5 Interaction with Fuse Failure Monitor (FFM).................................................................89

2.3.6 Dynamic Cold Load Pickup Function.............................................................................90

2.3.7 Inrush Restraint........................................................................................................... 90

2.3.8 Determination of Direction.......................................................................................... 90

2.3.9 Reverse Interlocking for Double End Fed Lines..............................................................94

2.3.10 Setting Notes...............................................................................................................95

2.3.11 Settings.....................................................................................................................101

2.3.12 Information List.........................................................................................................104

2.4 Dynamic Cold Load Pickup...............................................................................................106

2.4.1 Functional Description...............................................................................................106

2.4.2 Setting Notes.............................................................................................................108

2.4.3 Settings.....................................................................................................................109

2.4.4 Information List.........................................................................................................111

2.5 Single-Phase Overcurrent Protection................................................................................112

2.5.1 Functional Description...............................................................................................112

2.5.2 High-impedance Ground Fault Unit Protection........................................................... 113

2.5.3 Tank Leakage Protection............................................................................................115

2.5.4 Setting Notes.............................................................................................................116

2.5.5 Settings.....................................................................................................................121

2.5.6 Information List.........................................................................................................121

2.6 Voltage Protection 27, 59................................................................................................122

2.6.1 Measurement Principle.............................................................................................. 122

2.6.2 Overvoltage Protection 59......................................................................................... 123

2.6.3 Undervoltage Protection 27....................................................................................... 124

2.6.4 Setting Notes.............................................................................................................127

2.6.5 Settings.....................................................................................................................130

2.6.6 Information List.........................................................................................................131

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Table of Contents

2.7 Negative Sequence Protection 46....................................................................................132

2.7.1 Definite Time characteristic .......................................................................................132

2.7.2 Inverse Time characteristic.........................................................................................132

2.7.3 Setting Notes.............................................................................................................135

2.7.4 Settings.....................................................................................................................136

2.7.5 Information List.........................................................................................................137

2.8 Frequency Protection 81 O/U...........................................................................................138

2.8.1 Functional Description...............................................................................................138

2.8.2 Setting Notes.............................................................................................................139

2.8.3 Settings.....................................................................................................................140

2.8.4 Information List.........................................................................................................141

2.9 Undervoltage-controlled reactive power protection (27/Q)...............................................142

2.9.1 Functional Description...............................................................................................142

2.9.2 Setting Notes.............................................................................................................144

2.9.3 Settings.....................................................................................................................145

2.9.4 Information List.........................................................................................................146

2.10 Thermal Overload Protection 49...................................................................................... 147

2.10.1 Functional Description...............................................................................................147

2.10.2 Setting Notes.............................................................................................................149

2.10.3 Settings.....................................................................................................................152

2.10.4 Information List.........................................................................................................152

2.11 Monitoring Functions......................................................................................................154

2.11.1 Measurement Supervision......................................................................................... 154

2.11.1.1 General................................................................................................................154

2.11.1.2 Hardware Monitoring .......................................................................................... 154

2.11.1.3 Software Monitoring ........................................................................................... 156

2.11.1.4 Monitoring of the Transformer Circuits................................................................. 157

2.11.1.5 Measurement Voltage Failure Detection............................................................... 158

2.11.1.6 Broken Wire Monitoring of Voltage Transformer Circuits....................................... 162

2.11.1.7 Setting Notes....................................................................................................... 163

2.11.1.8 Settings............................................................................................................... 164

2.11.1.9 Information List................................................................................................... 165

2.11.2 Trip Circuit Supervision 74TC..................................................................................... 166

2.11.2.1 Functional Description......................................................................................... 166

2.11.2.2 Setting Notes....................................................................................................... 169

2.11.2.3 Settings............................................................................................................... 169

2.11.2.4 Information List................................................................................................... 170

2.11.3 Malfunction Responses of the Monitoring Functions.................................................. 170

2.11.3.1 Description.......................................................................................................... 170

2.12 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s).........................................................172

2.12.1 Ground Fault Detection for cos-ϕ / sin-ϕ Measurement (Standard Method)..................172

2.12.2 Ground Fault Detection for V0/I0-ϕ Measurement.......................................................178

2.12.3 Extended Ground Fault Protection EPTR/TNP.............................................................. 182

2.12.3.1 General Information.............................................................................................182

2.12.3.2 Ground-Fault Protection EPTR - B.......................................................................... 183

2.12.3.3 Transformer Neutral-Point Protection TNP.............................................................184

2.12.4 Ground Fault Location............................................................................................... 184

2.12.5 Setting Notes.............................................................................................................185

2.12.6 Settings.....................................................................................................................193

2.12.7 Settings EPTR, TNP.....................................................................................................195

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2.12.8 Information List.........................................................................................................195

2.12.9 Information List EPTR, TNP......................................................................................... 196

2.13 Intermittent Ground Fault Protection...............................................................................198

2.13.1 Functional Description...............................................................................................198

2.13.2 Setting Notes.............................................................................................................201

2.13.3 Settings.....................................................................................................................202

2.13.4 Information List.........................................................................................................203

2.14 Dir. Intermittent earth fault protection............................................................................ 204

2.14.1 Functional Description...............................................................................................204

2.14.2 Setting Notes.............................................................................................................207

2.14.3 Settings.....................................................................................................................208

2.14.4 Information List.........................................................................................................208

2.15 Automatic Reclosing System 79.......................................................................................209

2.15.1 Program Execution.................................................................................................... 209

2.15.2 Blocking.................................................................................................................... 213

2.15.3 Status Recognition and Monitoring of the Circuit Breaker........................................... 215

2.15.4 Controlling Protection Elements.................................................................................216

2.15.5 Zone Sequencing / Fuse Saving Scheme..................................................................... 218

2.15.6 Setting Notes.............................................................................................................219

2.15.7 Settings.....................................................................................................................224

2.15.8 Information List.........................................................................................................230

2.16 Fault Locator...................................................................................................................232

2.16.1 Functional Description...............................................................................................232

2.16.2 Setting Notes.............................................................................................................233

2.16.3 Settings.....................................................................................................................234

2.16.4 Information List.........................................................................................................234

2.17 Breaker Failure Protection 50BF.......................................................................................235

2.17.1 Functional Description...............................................................................................235

2.17.2 Setting Notes.............................................................................................................238

2.17.3 Settings.....................................................................................................................240

2.17.4 Information List.........................................................................................................241

2.18 Flexible Protection Functions...........................................................................................242

2.18.1 Functional Description...............................................................................................242

2.18.2 Setting Notes.............................................................................................................246

2.18.3 Settings.....................................................................................................................250

2.18.4 Information List.........................................................................................................252

2.19 Reverse-Power Protection Application with Flexible Protection Function...........................253

2.19.1 Functional Description...............................................................................................253

2.19.2 Implementation of the Reverse Power Protection....................................................... 256

2.19.3 Configuring the Reverse Power Protection in DIGSI.....................................................258

2.20 Synchrocheck................................................................................................................. 261

2.20.1 General..................................................................................................................... 261

2.20.2 Functional Sequence................................................................................................. 263

2.20.3 De-energized Switching.............................................................................................264

2.20.4 Direct Command / Blocking........................................................................................265

2.20.5 Interaction with Control, Automatic Reclosing and External Control............................265

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2.20.6 Setting Notes.............................................................................................................267

2.20.7 Settings.....................................................................................................................271

2.20.8 Information List.........................................................................................................272

2.21 Phase Rotation................................................................................................................ 274

2.21.1 Functional Description...............................................................................................274

2.21.2 Setting Notes.............................................................................................................274

2.22 Function Logic................................................................................................................ 275

2.22.1 Pickup Logic of the Entire Device................................................................................275

2.22.2 Tripping Logic of the Entire Device.............................................................................275

2.22.3 Setting Notes.............................................................................................................276

2.23 Auxiliary Functions..........................................................................................................277

2.23.1 Message Processing...................................................................................................277

2.23.1.1 LED Displays and Binary Outputs (Output Relays)..................................................277

2.23.1.2 Information on the Integrated Display (LCD) or Personal Computer....................... 277

2.23.1.3 Information to a Control Center............................................................................279

2.23.2 Statistics....................................................................................................................279

2.23.2.1 Functional Description......................................................................................... 279

2.23.2.2 Circuit Breaker Maintenance.................................................................................280

2.23.2.3 Setting Notes....................................................................................................... 286

2.23.2.4 Information List................................................................................................... 288

2.23.3 Measurement............................................................................................................288

2.23.3.1 Display of Measured Values.................................................................................. 289

2.23.3.2 Transfer of Measured Values................................................................................ 290

2.23.3.3 Information List................................................................................................... 291

2.23.4 Average Measurements............................................................................................. 292

2.23.4.1 Functional Description......................................................................................... 292

2.23.4.2 Setting Notes....................................................................................................... 292

2.23.4.3 Settings............................................................................................................... 293

2.23.4.4 Information List................................................................................................... 293

2.23.5 Min/Max Measurement Setup.................................................................................... 293

2.23.5.1 Functional Description......................................................................................... 293

2.23.5.2 Setting Notes....................................................................................................... 293

2.23.5.3 Settings............................................................................................................... 294

2.23.5.4 Information List................................................................................................... 294

2.23.6 Set Points for Measured Values.................................................................................. 295

2.23.6.1 Setting Notes....................................................................................................... 296

2.23.7 Set Points for Statistic................................................................................................ 296

2.23.7.1 Functional Description......................................................................................... 296

2.23.7.2 Setting Notes....................................................................................................... 296

2.23.7.3 Information List................................................................................................... 296

2.23.8 Energy Metering........................................................................................................296

2.23.8.1 Functional Description......................................................................................... 297

2.23.8.2 Setting Notes....................................................................................................... 297

2.23.8.3 Settings............................................................................................................... 297

2.23.8.4 Information List................................................................................................... 297

2.23.9 Commissioning Aids.................................................................................................. 297

2.23.9.1 Functional Description......................................................................................... 298

2.24 Breaker Control...............................................................................................................299

2.24.1 Control Device...........................................................................................................299

2.24.1.1 Functional Description......................................................................................... 299

2.24.1.2 Information List................................................................................................... 300

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2.24.2 Types of Commands.................................................................................................. 300

2.24.2.1 Functional Description......................................................................................... 300

2.24.3 Command Sequence..................................................................................................300

2.24.3.1 Functional Description......................................................................................... 301

2.24.4 Interlocking............................................................................................................... 301

2.24.4.1 Functional Description......................................................................................... 301

2.24.5 Command Logging.................................................................................................... 308

2.24.5.1 Functional Description......................................................................................... 308

2.25 Notes on Device Operation..............................................................................................309

2.25.1 Different operation....................................................................................................309

3 Mounting and Commissioning................................................................................................................. 311

3.1 Mounting and Connections............................................................................................. 312

3.1.1 Configuration Information......................................................................................... 312

3.1.2 Hardware Modifications.............................................................................................315

3.1.2.1 Disassembly.........................................................................................................315

3.1.2.2 Connections of the Current Terminals...................................................................318

3.1.2.3 Connections of the Voltage Terminals...................................................................319

3.1.2.4 Interface Modules................................................................................................ 320

3.1.2.5 Reassembly..........................................................................................................322

3.1.3 Installation................................................................................................................ 323

3.1.3.1 General................................................................................................................323

3.1.3.2 Panel Flush Mounting...........................................................................................324

3.1.3.3 Cubicle Mounting.................................................................................................325

3.1.3.4 Panel Surface Mounting....................................................................................... 326

3.2 Checking Connections.....................................................................................................328

3.2.1 Checking the Data Connections of the Interfaces........................................................328

3.2.2 Checking the System Connections............................................................................. 330

3.3 Commissioning............................................................................................................... 332

3.3.1 Test Mode and Transmission Block.............................................................................333

3.3.2 Testing the System Interface (at Port B) .....................................................................333

3.3.3 Configuring Communication Modules........................................................................334

3.3.4 Checking the Status of Binary Inputs and Outputs...................................................... 338

3.3.5 Tests for Breaker Failure Protection............................................................................ 340

3.3.6 Testing User-Defined Functions..................................................................................342

3.3.7 Current, Voltage, and Phase Rotation Testing............................................................. 342

3.3.8 Test for High Impedance Protection........................................................................... 343

3.3.9 Testing the Reverse Interlocking Scheme....................................................................343

3.3.10 Direction Check with Load Current.............................................................................344

3.3.11 Polarity Check for Voltage Input V3.............................................................................345

3.3.12 Ground Fault Check................................................................................................... 347

3.3.13

Polarity Check for Current Input ΙE..............................................................................347

3.3.14 Trip/Close Tests for the Configured Operating Devices................................................ 350

3.3.15 Creating Oscillographic Recordings for Tests.............................................................. 350

3.4 Final Preparation of the Device........................................................................................352

4 Technical Data.......................................................................................................................................... 353

4.1 General Device Data........................................................................................................354

4.1.1 Analog Inputs............................................................................................................354

4.1.2 Auxiliary voltage........................................................................................................354

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Table of Contents

4.1.3 Binary Inputs and Outputs......................................................................................... 355

4.1.4 Communication Interfaces.........................................................................................356

4.1.5 Electrical Tests...........................................................................................................358

4.1.6 Mechanical Tests....................................................................................................... 360

4.1.7 Climatic Stress Tests.................................................................................................. 360

4.1.8 Service Conditions..................................................................................................... 361

4.1.9 Constructive Design...................................................................................................361

4.1.10 UL certification conditions......................................................................................... 362

4.2 Definite-time Overcurrent Protection...............................................................................363

4.3 Inverse-time Overcurrent Protection................................................................................365

4.4 Directional Overcurrent Protection.................................................................................. 376

4.5 Inrush Restraint...............................................................................................................378

4.6 Dynamic Cold Load Pickup...............................................................................................379

4.7 1-phase Overcurrent Protection.......................................................................................380

4.8 Voltage Protection.......................................................................................................... 381

4.9 Negative Sequence Protection (definite-time characteristic).............................................383

4.10 Negative Sequence Protection (inverse-time characteristics)............................................384

4.11 Frequency Protection 81 O/U...........................................................................................390

4.12 Undervoltage-controlled reactive power protection (27/Q)...............................................391

4.13 Thermal Overload Protection...........................................................................................393

4.14 Ground Fault Detection (Sensitive/Insensitive).................................................................395

4.15 Intermittent Ground Fault Protection...............................................................................401

4.16 Directional intermittent ground fault protection.............................................................. 402

4.17 Automatic Reclosing....................................................................................................... 403

4.18 Fault Locator...................................................................................................................404

4.19 Breaker Failure Protection 50BF ...................................................................................... 405

4.20 Flexible Protection Functions ..........................................................................................406

4.21 Synchrocheck 25 ............................................................................................................409

4.22 User-defined Functions (CFC).......................................................................................... 411

4.23 Auxiliary Functions..........................................................................................................416

4.24 Switching Device Control................................................................................................ 421

4.25 Dimensions.....................................................................................................................422

4.25.1 Panel Flush and Cubicle Mounting (Housing Size 1/6) ................................................422

4.25.2 Panel Surface Mounting (Housing Size 1/6) ............................................................... 423

4.25.3 Bottom view..............................................................................................................423

4.25.4 Varistor..................................................................................................................... 424

A Ordering Information and Accessories.....................................................................................................425

A.1 Ordering Information 7SJ80 ........................................................................................... 426

A.2 Accessories.....................................................................................................................431

B Terminal Assignments..............................................................................................................................433

B.1 7SJ80 — Housing for panel flush mounting and cubicle installation and for panel

surface mounting ...........................................................................................................434

C Connection Examples............................................................................................................................... 441

C.1 Connection Examples for Current and Voltage Transformers............................................442

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Table of Contents

C.2 Connection Examples for SICAM I/O Units........................................................................454

D Current Transformer Requirements......................................................................................................... 455

D.1 Accuracy limiting factors................................................................................................. 456

D.2 Class conversion............................................................................................................. 457

D.3 Cable core balance current transformer........................................................................... 458

E Default Settings and Protocol-dependent Functions............................................................................... 459

E.1 LEDs............................................................................................................................... 460

E.2 Binary Input.................................................................................................................... 462

E.3 Binary Output................................................................................................................. 463

E.4 Function Keys................................................................................................................. 464

E.5 Default Display................................................................................................................465

E.6 Protocol-dependent Functions.........................................................................................468

F Functions, Settings, Information..............................................................................................................469

F.1 Functional Scope............................................................................................................ 470

F.2 Settings.......................................................................................................................... 472

F.3 Information List.............................................................................................................. 501

F.4 Group Alarms..................................................................................................................539

F.5 Measured Values.............................................................................................................541

Literature.................................................................................................................................................. 547

Glossary.................................................................................................................................................... 549

Index.........................................................................................................................................................559

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1

Introduction

The device family SIPROTEC 7SJ80 devices is introduced in this section. An overview of the devices is
presented in their application, characteristics, and scope of functions.

1.1 Overall Operation 20

1.2 Application Scope 22

1.3 Characteristics 24

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Introduction

1.1 Overall Operation

1.1

Analog Inputs

Overall Operation

The digital SIPROTEC 7SJ80 overcurrent protection is equipped with a powerful microprocessor. It allows all
tasks to be processed digitally, from the acquisition of measured quantities to sending commands to circuit
breakers. Figure 1-1 shows the basic structure of the 7SJ80.

The measuring inputs (MI) convert the currents and voltages coming from the measuring transformers and
adapt them to the level appropriate for the internal processing of the device. The device provides 4 current
transformers and - depending on the model - additionally 3 voltage transformers. Three current inputs serve
for the input of the phase currents, another current input (ΙN) may be used for measuring the ground fault

current ΙN (current transformer neutral point) or for a separate ground current transformer (for sensitive
ground fault detection ΙNs and directional determination of ground faults ) - depending on the model.

[hw-struktur-7sj80-060606, 1, en_US]

Figure 1-1

The optional voltage transformers can either be used to input 3 phase-to-ground voltages or 2 phase-to-phase
voltages and the displacement voltage (open delta voltage) or any other voltages. It is also possible to connect
two phase-to-phase voltages in open delta connection.

The analog input quantities are passed on to the input amplifiers (IA). The input amplifier IA element provides
a high-resistance termination for the input quantities. It consists of filters that are optimized for measured­value processing with regard to bandwidth and processing speed.

The analog-to-digital (AD) transformer group consists of an analog-to-digital converter and memory compo­nents for the transmission of data to the microcomputer.

20 SIPROTEC 4, 7SJ80, Manual

Hardware structure of the digital multi-functional protective relay 7SJ80

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Microcomputer System

Apart from processing the measured values, the microcomputer system (μC) also executes the actual protec­tion and control functions. They especially include:

Filtering and preparation of the measured quantities

•

Continuous monitoring of the measured quantities

•

Monitoring of the pickup conditions for the individual protective functions

•

Interrogation of limit values and sequences in time

•

Control of signals for the logic functions

•

Output of control commands for switching devices

•

Recording of messages, fault data and fault values for analysis

•

Management of the operating system and the associated functions such as data recording, real-time

•

clock, communication, interfaces, etc.

The information is distributed via output amplifiers (OA).

•

Binary Inputs and Outputs

The computer system obtains external information through the binary input/output boards (inputs and
outputs). The computer system obtains information from the system (e.g remote resetting) or from external
equipment (e.g. blocking commands). These outputs include, in particular, trip commands to circuit breakers
and signals for the remote indication of important events and conditions.

Introduction

1.1 Overall Operation

Front Panel

Information such as messages related to events, states, measured values and the functional status of the
device are visualized by light-emitting diodes (LEDs) and a display screen (LCD) on the front panel.

Integrated control and numeric keys in conjunction with the LCD enable interaction with the remote device.
These elements can be used to access the device for information such as configuration and setting parame­ters. Similarly, setting parameters can be accessed and changed if needed.

In addition, control of circuit breakers and other equipment is possible from the front panel of the device.

Interfaces

Communication with a PC can be implemented via the USB DIGSI interface using the DIGSI software, allowing
all device functions to be easily executed.

Communication with a PC is also possible via port A (Ethernet interface) and port B (System/Service interface)
using DIGSI.

In addition to the device communication via DIGSI, port B can also be used to transmit all device data to a
central evaluator or a control center. This interface may be provided with various protocols and physical trans­mission schemes to suit the particular application.

Power Supply

A power supply unit (Vaux or PS) delivers power to the functional units using the different voltage levels.
Voltage dips may occur if the voltage supply system (substation battery) becomes short-circuited. Usually,
they are bridged by a capacitor (see also Technical Data).

A buffer battery is located under the flap at the lower end of the front cover.

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Introduction

1.2 Application Scope

1.2

Protective Functions

Application Scope

The multi-function numerical overcurrent protection SIPROTEC 4 7SJ80 is used as protection, control and
monitoring unit for busbar feeders. For line protection, the device can be used in networks with grounded,
lowresistance grounded, isolated or a compensated neutral point structure. It is suited for networks that are
radial and supplied from a single source, open or closed looped networks and for lines with sources at both
ends.

The device includes the functions that are usually necessary for protection, monitoring of circuit breaker posi­tions and control of circuit breakers in single and double busbars; therefore, the device can be employed
universally. The device provides excellent backup protection of differential protective schemes of any kind for
lines, transformers and busbars of all voltage levels.

Non-directional overcurrent protection (50, 50N, 51, 51N) is the basic function of the device. There are three
definite time elements and one inverse time element for the phase currents and the ground current. For the
inverse time elements, several characteristics of different standards are provided. Alternatively, a user-defined
characteristic can be used for the sensitive ground fault detection.

Further protection functions included are the negative sequence protection, overload protection, circuit
breaker failure protection and ground fault protection.

Depending on the ordered variant, further protection functions are included, such as frequency protection,
overvoltage and undervoltage protection, and ground fault protection for high-resistance ground faults (direc­tional or non-directional).

Apart from the short circuit protection functions mentioned before, there are further protection functions
possible as order variants. The overcurrent protection can, for example, be supplemented by a directional
overcurrent protection.

The automatic reclosing function enables several different reclosing cycles for overhead lines. An external
automatic reclosing system can also be connected. To ensure quick detection of the fault location after a short
circuit, the device is equipped with a fault locator.

Before reclosing after a three-pole tripping, the device can verify the validity of the reclosure via a voltage
check and/or a synchrocheck. The synchrocheck function can also be controlled externally.

Control Functions

The device provides a control function which can be accomplished for activating and deactivating the switch­gear via operator buttons, port B, binary inputs and - using a PC and the DIGSI software - via the front inter­face.

The status of the primary equipment can be transmitted to the device via auxiliary contacts connected to
binary inputs. The present status (or position) of the primary equipment can be displayed on the device, and
used for interlocking or alarm condition monitoring. The number of operating equipments to be switched is
limited by the binary inputs and outputs available in the device or the binary inputs and outputs allocated for
the switch position indications. Depending on the primary equipment being controlled, one binary input
(single point indication) or two binary inputs (double point indication) may be used for this process.

The capability of switching primary equipment can be restricted by a setting associated with switching
authority (Remote or Local), and by the operating mode (interlocked/non-interlocked, with or without pass­word request).

Processing of interlocking conditions for switching (e.g. switchgear interlocking) can be established with the
aid of integrated, user-configurable logic functions.

Messages and Measured Values; Recording of Event and Fault Data

The operational indications provide information about conditions in the power system and the device. Meas­urement quantities and values that are calculated can be displayed locally and communicated via the serial
interfaces.

Device messages can be assigned to a number of LEDs on the front cover (allocatable), can be externally
processed via output contacts (allocatable), linked with user-definable logic functions and/or issued via serial
interfaces.

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During a fault (system fault) important events and changes in conditions are saved in fault protocols (Event
Log or Trip Log). Instantaneous fault values are also saved in the device and may be analyzed subsequently.

Communication

The following interfaces are available for communication with external operating, control and memory
systems.

The USB DIGSI interface on the front cover serves for local communication with a PC. By means of the
SIPROTEC 4 operating software DIGSI, all operational and evaluation tasks can be executed via this operator
interface, such as specifying and modifying configuration parameters and settings, configuring user-specific
logic functions, retrieving operational messages and measured values, inquiring device conditions and meas­ured values, issuing control commands.

Depending on the ordered variant, additional interfaces are located at the bottom of the device. They serve for
establishing extensive communication with other digital operating, control and memory components:

Port A serves for DIGSI communication directly on the device or via network. Furthermore, 2 SICAM I/O units
7XV5673 can be connected to this port. Port A can also be used for time synchronization using the NTP
protocol.

Port B serves for central communication between the device and a control center. It can be operated via data
lines or fiber optic cables. For the data transfer, there are standard protocols in accordance with IEC 60870-5­103 available. The integration of the devices into the SINAUT LSA and SICAM automation systems can also be
implemented with this profile.

Alternatively, additional connection options are available with PROFIBUS DP and the DNP3.0 and MODBUS
protocols. If an EN100 module is available, you can use the protocols IEC61850, PROFINET or DNP3 TCP.
Furthermore, connecting a SICAM I/O unit is possible via IEC651850 GOOSE.

Introduction

1.2 Application Scope

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Introduction

1.3 Characteristics

1.3

General Characteristics

Characteristics

Powerful 32-bit microprocessor system

•

Complete digital processing and control of measured values, from the sampling of the analog input quan-

•

tities to the initiation of outputs, for example, tripping or closing circuit breakers or other switchgear
devices

Total electrical separation between the internal processing stages of the device and the external trans-

•

former, control, and DC supply circuits of the system because of the design of the binary inputs, outputs,
and the DC or AC converters

Complete set of functions necessary for the proper protection of lines, feeders, motors, and busbars

•

Easy device operation through an integrated operator panel or by means of a connected personal

•

computer running DIGSI

Continuous calculation and display of measured and metered values on the front of the device

•

Storage of min./max. measured values (slave pointer function) and storage of long-term mean values

•

Recording of event and fault data for the last 8 system faults (fault in a network) with real-time informa-

•

tion as well as instantaneous values for fault recording for a maximum time range of 20 s

Constant monitoring of the measured quantities, as well as continuous self-diagnostics covering the

•

hardware and software

Communication with SCADA or substation controller equipment via serial interfaces through the choice

•

of data cable, modem, or optical fibers

Battery-buffered clock which can be synchronized via a synchronization signal at the binary input or via a

•

protocol

Switching statistics: Counting the number of trip commands initiated by the device, logging the currents

•

of the last switch-off operation initiated by the device, and accumulating the eliminated short-circuit
currents of each breaker pole

Operating hours counter: Counting the operating hours of the protected object under load

•

Commissioning aids such as connection and direction check, status indication of all binary inputs and

•

outputs, easy testing of port B, and influencing of information at port B during test operation.

Time Overcurrent Protection 50, 51, 50N, 51N

Three definite time overcurrent protective elements and one inverse time overcurrent protective element

•

for phase current and ground current ΙN or summation current 3Ι

Two-phase operation of the overcurrent protection (ΙA, ΙC) is possible

•

For inverse-time overcurrent protection, selection from various characteristics of different standards

•

possible

Blocking is possible, e.g. for reverse interlocking with any element

•

Instantaneous tripping by any element is possible when switching onto a fault

•

In-rush restraint with second harmonic current quantities.

•

Ground Fault Protection 50N, 51N

0

Three definite time overcurrent protective elements and one inverse time overcurrent protective element

•

applicable for grounded or high-resistance grounded systems

For inverse-time overcurrent protection, selection from various characteristics of different standards

•

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In-rush restraint with second harmonic current quantities

•

Instantaneous tripping by any overcurrent element upon switch onto fault is possible.

•

Directional Time Overcurrent Protection 67, 67N

Three definite time overcurrent protection elements and one inverse time overcurrent protection

•

element for the phase operate in parallel to the non-directional overcurrent elements. Their pickup values
and time delays can be set independently of these.

Direction determination with cross-polarized voltages and voltage memory and dynamically unlimited

•

direction sensitivity

Fault direction is calculated phase-selectively and separately for phase faults, ground faults and summa-

•

tion current faults.

Dynamic Cold Load Pick-up Function 50C, 50NC, 51C, 51NC, 67C, 67NC

Dynamic changeover of time overcurrent protection settings, e.g. when cold load conditions are recog-

•

nized

Detection of cold load condition via circuit breaker position or current threshold

•

Activation via automatic reclosure (AR) is possible

•

Activation also possible via binary input.

•

Introduction

1.3 Characteristics

Single-Phase Overcurrent Protection

Evaluation of the measured current via the sensitive or insensitive ground current transformer

•

Suitable as differential protection that includes the neutral point current on transformer side, generator

•

side or motor side or for a grounded reactor set

As tank leakage protection against abnormal leakage currents between transformer tanks and ground.

•

Voltage Protection 27, 59

Two element undervoltage detection via the positive-sequence system of the voltages, phase-to-phase or

•

phase-to-ground voltages

Choice of current supervision for 27-1 and 27-2

•

Separate two-element overvoltage detection of the largest voltages applied or detection of the positive or

•

negative sequence component of the voltages

Settable dropout ratio for all elements of the undervoltage and overvoltage protection.

•

Negative Sequence Protection 46

Evaluation of the negative sequence component of the currents

•

Two definite-time elements 46-1 and 46-2 and one inverse-time element 46-TOC; curves of common

•

standards are available for 46-TOC.

Frequency Protection 81 O/U

Monitoring of falling below (f<) and/or exceeding (f>) with 4 frequency limits and time delays that are

•

independently adjustable

Insensitive to harmonics and abrupt phase angle changes

•

Adjustable undervoltage threshold.

•

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Introduction

1.3 Characteristics

Undervoltage-controlled reactive power protection (27/Q)

Detection of critical power system situations

•

Disconnection of power supply facilities from the grid

•

Reconnection under stable power system conditions

•

Thermal Overload Protection 49

Thermal profile of energy losses (overload protection has full memory capability)

•

True r.m.s. calculation

•

Adjustable thermal warning element

•

Adjustable alarm level based on current magnitude

•

Monitoring Functions

Increased reliability due to monitoring of the internal measurement circuits as well as the hardware and

•

software

Fuse failure monitor with protection function blocking

•

Monitoring of the current transformer and voltage transformer secondary circuits using sum and

•

symmetry supervision with optional protection function blocking

Trip circuit monitoring possible

•

Phase rotation check.

•

Ground Fault Detection 50N(s), 51N(s), 67N(s), 59N/64

Displacement voltage is measured or calculated from the three phase voltages

•

Determination of a faulty phase on ungrounded or grounded systems

•

Two-element Ground Fault Detection: 50Ns-1 and 50Ns-2

•

High sensitivity (as low as 1 mA)

•

Overcurrent element with definite time or inverse time delay

•

For inverse-time overcurrent protection, a user-defined characteristic is available

•

Direction determination with zero sequence quantities(Ι0, V0), wattmetric ground fault direction determi-

•

nation

Any element can be set as directional or non-directional — forward sensing directional, or reverse

•

sensing directional

Optionally applicable as additional ground fault protection.

•

Intermittent Ground Fault Protection

Detects and accumulates intermittent ground faults

•

Tripping after configurable total time.

•

Directional intermittent ground fault protection

Detects intermittent ground faults

•

Direction determination

•

Tripping after settable number of intermittent re-ignitions

•

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Automatic Reclosing 79

Single-shot or multi-shot

•

With separate dead times for the first and all succeeding shots

•

Protective elements that initiate automatic reclosing are selectable. The choices can be different for

•

phase faults and ground faults

Separate programs for phase and ground faults

•

Interaction to time overcurrent protection element and ground fault elements. They can be blocked in

•

dependence of the reclosing cycle or released instantaneously

Synchronous reconnection is possible .

•

Fault Location

Initiation by trip command, external command or dropout of pickup

•

Calculation of the fault distance and output of the fault location in ohms (primary and secondary) and in

•

kilometers or miles

Up to three line sections can be configured.

•

Breaker Failure Protection 50 BF

By checking the current and/or evaluating the circuit breaker auxiliary contacts

•

Started by any integrated protection function that trips

•

Initiation possible via a binary input from an external protective device.

•

Introduction

1.3 Characteristics

Flexible Protective Functions

Up to 20 customizable protection functions with three-phase or single-phase operation

•

Any calculated or directly measured quantity can be evaluated on principle

•

Standard protection logic with definite time characteristic

•

Internal and configurable pickup and dropout delay

•

Modifiable message texts.

•

Synchrocheck

Verification of the synchronous conditions before reclosing after three-pole tripping

•

Fast measurement of the voltage difference ΔV, the phase angle difference Δϕ and the frequency differ-

•

ence Δf

Alternatively, check of the de-energized state before reclosing

•

Setable minimum and maximum voltage

•

Verification of the synchronous conditions or de-energized state also possible before the manual closing

•

of the circuit breaker, with separate limit values

Measurement also possible via transformer without external intermediate matching transformer

•

Measuring voltages optionally phase–to–phase or phase–to–ground.

•

Phase Rotation

Selectable ABC or ACB by setting (static) or binary input (dynamic).

•

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Introduction

1.3 Characteristics

Circuit-Breaker Maintenance

Statistical methods to help adjust maintenance intervals for CB contacts according to their actual wear

•

several independent subfunctions have been implemented(ΣΙ-procedure, ΣΙx-procedure, 2P-procedure

•

and Ι2t-procedure)

Acquisition and conditioning of measured values for all subfunctions operates phase-selective using one

•

procedure-specific threshold per subfunction.

User Defined Functions

Freely programmable linking of internal and external signals in order to implement user-defined logic

•

functions

All standard logic functions (AND, OR, NOT, EXCLUSIVE-OR, etc.)

•

Time delays and limit value interrogations

•

Processing of measured values, including zero suppression, adding a knee curve for a transducer input,

•

and live-zero monitoring.

Breaker Control

Switching devices can be opened and closed manually using control keys, programmable function keys,

•

via port B (e.g. of SICAM or LSA), or via the user interface (using a personal computer and the DIGSI oper­ating software)

Feedback of switching states via the switch auxiliary contacts

•

Plausibility monitoring of the circuit breaker position and check of interlocking conditions.

•

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2

Functions

This chapter describes the numerous functions available on the SIPROTEC 4 device 7SJ80. It shows the setting
possibilities for each function in maximum configuration. Information with regard to the determination of
setting values as well as formulas, if required, are also provided.

Based on the following information, it can also be determined which of the provided functions should be
used.

2.1 General 30

2.2 Overcurrent Protection 50, 51, 50N, 51N 56

2.3 Directional Overcurrent Protection 67, 67N 82

2.4 Dynamic Cold Load Pickup 106

2.5 Single-Phase Overcurrent Protection 112

2.6 Voltage Protection 27, 59 122

2.7 Negative Sequence Protection 46 132

2.8 Frequency Protection 81 O/U 138

2.9 Undervoltage-controlled reactive power protection (27/Q) 142

2.10 Thermal Overload Protection 49 147

2.11 Monitoring Functions 154

2.12 Ground Fault Protection 64, 67N(s), 50N(s), 51N(s) 172

2.13 Intermittent Ground Fault Protection 198

2.14 Dir. Intermittent earth fault protection 204

2.15 Automatic Reclosing System 79 209

2.16 Fault Locator 232

2.17 Breaker Failure Protection 50BF 235

2.18 Flexible Protection Functions 242

2.19 Reverse-Power Protection Application with Flexible Protection Function 253

2.20 Synchrocheck 261

2.21 Phase Rotation 274

2.22 Function Logic 275

2.23 Auxiliary Functions 277

2.24 Breaker Control 299

2.25 Notes on Device Operation 309

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i

i

Functions

2.1 General

2.1

2.1.1

2.1.1.1

Setting the Functional Scope

General

The settings associated with the various device functions can be modified using the operating or service inter­face in DIGSI in conjunction with a personal computer. Some parameters can also be changed using the
controls on the front panel of the device. The procedure is described in detail in the SIPROTEC System Descrip­tion /1/ SIPROTEC 4 System Description.

Functional Scope

The 7SJ80 relay contains protection functions as well as auxiliary functions. The hardware and firmware is
designed for this scope of functions. Additionally, the control functions can be matched to the system require­ments. Individual functions can be enabled or disabled during the configuration procedure. The interaction of
functions may also be modified.

Functional Description

Example for the configuration of the functional scope:
A protected system consists of overhead lines and underground cables. Since automatic reclosing is only

needed for the overhead lines, the automatic reclosing function is not configured or “disabled” for the relays
protecting the underground cables.

The available protection and additional functions can be configured as Enabled or Disabled. For individual
functions, a choice between several alternatives may be possible, as described below.

Functions configured as Disabled are not processed by the 7SJ80. There are no messages and corresponding
settings (functions, limit values) queried during configuration.

NOTE

Available functions and default settings are depending on the order variant of the relay (see A Ordering

Information and Accessories).

2.1.1.2

Setting the Functional Scope

Special Features

Setting Notes

Your protection device is configured using the DIGSI software. Connect your personal computer either to the
USB port on the device front or to port A or port B on the bottom side of the device depending on the device
version (ordering code). The operation via DIGSI is explained in the SIPROTEC 4 System Description.

The Device Configuration dialog box allows you to adjust your device to the specific system conditions.
Password no. 7 is required (for parameter set) for changing configuration parameters in the device. Without

the password the settings can only be read but not edited and transmitted to the device.

Most settings are self-explanatory. The special cases are described in the following.
If you want to use the setting group change function, set address 103 Grp Chge OPTION to Enabled. In

this case, you can select up to four different groups of function parameters between which you can switch
quickly and conveniently during operation. Only one setting group can be used when selecting the option
Disabled.

For the elements associated with non-directional overcurrent protection 50(N), 51(N) (phase and ground),
various tripping characteristics can be selected at addresses 112 Charac. Phase and 113 Charac.
Ground. If only the definite time characteristic is desired, select Definite Time. Alternatively, you can
select between inverse-time curves according to IEC standard (TOC IEC) or ANSI standard (TOC ANSI). The
dropout behavior of the IEC and ANSI curves is specified at address 1210 or 1310 when configuring the time
overcurrent protection.

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