IEC TR 61850-90-30:2025

Communication networks and systems for power utility automation - Part 90-30: IEC 61850 Function Modelling in SCL

IEC TR 61850-90-30:2025, which is a Technical Report, describes extensions of the SCL Substation/Process Section allowing the creation of a comprehensive, IED and hardware independent specification of an IEC 61850 based power system.
It addresses how to:
• decompose functions in SCL
• show function classifications in SCL
• relate functions with the SCL Substation and Process Section
• relate functions to Logical Nodes and IEDs/Specification IEDs
• present information flow between functions in a hardware/implementation independent way
• position Functions in relation to "Application Schemes", "Distributed Functions", "Protection Schemes"
• consider the relationship to Basic Application Profiles (BAP) defined in IEC TR 61850-7-6
The document addresses the engineering process as far as it is related to the specification of Functions and their instantiation in IEC 61850 based power system. This includes the impact on the SCL Process Section during system configuration.
The engineering process related to the definition of Applications and their instantiation is addressed in the Basic Application Profile Document (BAP) in IEC TR 61850-7-6.
The System Configuration process is described in IEC 61850-6.
Modifications and extensions of SCL are done in a way to guarantee backwards compatibility.
In addition, this document introduces:
• Some further elements to SCL that improve the content and usefulness of SSD files and facilitate the handling of SCL files for engineering purposes,
• New variants of IED specific files: ISD file and FSD files,
• Evolution of the engineering rights management, to first improve the usage of SED and add a new concept of System Configuration Collaboration (SCC file) which allows collaboration on the same project with different engineers.

General Information

• Status: Published
• Publication Date: 10-Mar-2025
• ICS: 33.200 - Telecontrol. Telemetering
• Technical Committee: TC 57 - Power systems management and associated information exchange
• Current Stage: PPUB - Publication issued
• Start Date: 29-Nov-2024
• Due Date: 11-Mar-2025
• Completion Date: 11-Mar-2025

Standards Content (Sample)

IEC TR 61850-90-30 ®
Edition 1.0 2025-03
TECHNICAL
REPORT
Communication networks and systems for power utility automation –
Part 90-30: IEC 61850 Function Modelling in SCL

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.

IEC Secretariat Tel.: [phone]
3, rue de Varembé [e-mail]
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.

About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.

IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch
The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews, graphical symbols and the glossary.
committee, …). It also gives information on projects, replaced With a subscription you will always have access to up to date
and withdrawn publications. content tailored to your needs.

IEC Just Published - webstore.iec.ch/justpublished
Electropedia - www.electropedia.org
Stay up to date on all new IEC publications. Just Published
The world's leading online dictionary on electrotechnology,
details all new publications released. Available online and once
containing more than 22 500 terminological entries in English
a month by email.
and French, with equivalent terms in 25 additional languages.

Also known as the International Electrotechnical Vocabulary
IEC Customer Service Centre - webstore.iec.ch/csc
(IEV) online.
If you wish to give us your feedback on this publication or need

further assistance, please contact the Customer Service
Centre: [e-mail].
IEC TR 61850-90-30 ®
Edition 1.0 2025-03
TECHNICAL
REPORT
Communication networks and systems for power utility automation –

Part 90-30: IEC 61850 Function Modelling in SCL

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.200  ISBN 978-2-8327-0068-6

– 2 – IEC TR 61850-90-30:2025 © IEC 2025
CONTENTS
FOREWORD . 11
INTRODUCTION . 13
1 Scope . 14
1.1 General . 14
1.2 Published versions of this standard and related namespace name . 14
1.3 Identification of the Code Components . 15
1.3.1 IEC 61850-6-100 XML namespace compliant with IEC 61850-6:2018
edition 2 amendment 1 . 15
1.3.2 IEC 61850-6-100 XML namespace compliant with IEC 61850-6:2024
edition 2 amendment 2 . 16
1.3.3 IEC/TR 61850-90-30 SSD example . 16
1.4 Code Component Distribution . 16
1.4.1 General . 16
1.4.2 SCL extension namespace code component . 17
1.4.3 SSD example code component . 17
2 Normative references . 17
3 Terms and definitions . 18
4 Functions and Applications . 19
4.1 General . 19
4.2 Functions . 19
4.3 Application Schemes . 19
4.4 Examples of Functions and Applications . 21
4.4.1 General . 21
4.4.2 1 ½ Breaker Control Application . 21
4.4.3 Breaker Failure Application . 21
4.4.4 Power Measurement Application . 22
4.4.5 Power Transformer Applications . 23
5 SCL extension representation concepts . 26
5.1 General . 26
5.2 PathName . 26
5.3 SCL Location . 27
5.4 Condition for attribute presence . 27
6 Data Flow inside and between Functions . 28
6.1 General . 28
6.2 Data Flow . 28
6.2.1 General . 28
6.2.2 SCL Location . 28
6.2.3 SourceRef . 28
6.2.4 ControlRef . 31
6.2.5 SourceRef and ControlRef connection . 32
6.3 Data flow resolution . 35
6.3.1 General . 35
6.3.2 SCL Location . 37
6.3.3 SubscriberLNode . 37
6.3.4 ControllingLNode . 37
6.4 Service-related Elements . 38
6.4.1 SpecServiceType . 38

6.4.2 ServiceSpecifications . 40
7 LNode Data specification . 53
7.1 SCL Location . 53
7.2 General . 53
7.3 Specification of Data Objects and Attributes . 53
7.3.1 General . 53
7.3.2 DOS/SDS/DAS Definition . 53
7.4 LNode Mapping Documentation . 57
8 LNodeSpecNaming . 58
8.1 SCL Location . 58
8.2 Definition . 58
9 ProcessResource . 60
9.1 SCL Location . 60
9.2 Definition . 60
9.3 SCL representation . 67
9.3.1 General . 67
9.3.2 ProcessResources . 67
9.3.3 ProcessResource . 67
9.3.4 Resource . 68
10 PowerSystemRelation . 70
10.1 SCL Location . 70
10.2 Definition . 70
10.3 SCL representation . 72
10.3.1 General . 72
10.3.2 PowerSystemRelations . 72
10.3.3 PowerSystemRelation . 72
11 SCL elements reference and categorisation . 73
11.1 General . 73
11.2 Function Reference . 73
11.2.1 General . 73
11.2.2 FunctionRef . 73
11.2.3 FunctionCatRef. 74
11.3 FunctionCategory. 74
11.3.1 SCL Location . 74
11.3.2 General . 74
11.3.3 SCL representation . 75
11.4 Allocation Role . 76
11.4.1 SCL Location . 76
11.4.2 Definition . 76
11.4.3 Example 1 . 77
11.4.4 Example 2 . 79
11.4.5 Example 3 . 81
12 Variables . 82
12.1 SCL Location . 82
12.2 Definition . 82
12.3 SCL representation . 84
12.3.1 General . 84
12.3.2 Variable .
...