IEC TR 62357-1:2012

IEC/TR 62357-1 ®
Edition 1.0 2012-10
TECHNICAL
REPORT
colour
inside
Power systems management and associated information exchange –
Part 1: Reference architecture

IEC/TR 62357-1:2012(E)
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 Central Office Tel.: +41 22 919 02 11
3, rue de Varembé Fax: +41 22 919 03 00
CH-1211 Geneva 20 info@iec.ch
Switzerland www.iec.ch
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 corrigenda or an amendment might have been published.

Useful links:
IEC publications search - www.iec.ch/searchpub Electropedia - www.electropedia.org
The advanced search enables you to find IEC publications The world's leading online dictionary of electronic and
by a variety of criteria (reference number, text, technical electrical terms containing more than 30 000 terms and
committee,…). definitions in English and French, with equivalent terms in
It also gives information on projects, replaced and additional languages. Also known as the International
withdrawn publications. Electrotechnical Vocabulary (IEV) on-line.

IEC Just Published - webstore.iec.ch/justpublished Customer Service Centre - webstore.iec.ch/csc
Stay up to date on all new IEC publications. Just Published If you wish to give us your feedback on this publication
details all new publications released. Available on-line and or need further assistance, please contact the
also once a month by email. Customer Service Centre: csc@iec.ch.

IEC/TR 62357-1 ®
Edition 1.0 2012-10
TECHNICAL
REPORT
colour
inside
Power systems management and associated information exchange –

Part 1: Reference architecture

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
PRICE CODE
XE
ICS 33.200 ISBN 978-2-83220-445-0

– 2 – TR 62357-1 © IEC:2012(E)
CONTENTS
FOREWORD . 7
INTRODUCTION . 9
0.1 General . 9
0.2 Objectives and overview of this technical report . 9
0.3 Rationale . 10
0.4 Trend toward model driven architectures and integration . 10
0.5 Purpose of the reference architecture . 11
0.6 Scope of reference architecture . 11
0.7 Purpose of the future reference architecture for power system information
exchange. 17
1 Overview . 18
1.1 Scope . 18
1.2 Normative references . 18
2 Abbreviations . 18
3 IEC TC 57 standards . 21
3.1 General . 21
3.2 IEC 60870-5 telecontrol protocol standards from WG3 . 22
3.3 IEC 60870-6 standards from WG7 . 22
3.4 IEC 61334 standards from WG9 . 23
3.4.1 General . 23
3.4.2 Relation to "external" standards . 23
3.5 IEC 61850 standards for power system IEC communication and associated

data models from WG10 . 24
3.5.1 General . 24
3.5.2 Substation architecture and interface specifications. 24
3.5.3 Substation configuration description language . 25
3.6 IEC 61970 energy management system application program interface
standards from WG13 . 26
3.6.1 General . 26
3.6.2 Common information model (CIM) . 26
3.6.3 Component interface specifications (CIS) for information exchange . 27
3.6.4 IEC 61970 standards as an integration framework . 27
3.7 IEC 61968 system interfaces for distribution management standards from
WG14 . 28
3.8 IEC 62351 standards for data and communications security from WG15 . 30
3.8.1 General . 30
3.8.2 Security for TCP/IP-based profiles . 31
3.8.3 Security for MMS ISO 9506 . 31
3.8.4 Security for IEC 60870-5 and derivatives . 31
3.8.5 Security for IEC 61850 peer-to-peer profiles . 32
3.8.6 Management Information Base (MIB) requirements for end-to-end
network management . 32
3.9 IEC 62325 standards for a framework for deregulated energy market
communications from WG16 . 34
3.10 IEC 61850 standards for communications systems for Distributed Energy
Resources (DER) from WG17 . 36

TR 62357-1 © IEC:2012(E) – 3 –
3.10.1 General . 36
3.10.2 Need for communications with DER systems . 36
3.10.3 IEC 61850-7-420 . 37
3.10.4 IEC 61850-90-7 DER inverter object models . 38
3.11 IEC 61850 standards for hydroelectric power plants from WG18 . 39
3.11.1 General . 39
3.11.2 Basic concepts for hydropower plant control and supervision . 40
3.11.3 Principles for water control in a river system . 41
3.11.4 Principles for electrical control of a hydropower plant . 41
3.12 WG19 harmonization . 42
3.13 IEC 62488 standards for power line communication systems for power utility
applications from WG20 . 42
3.14 Interfaces and protocol profiles relevant to systems connected to the
electrical grid from WG21 . 42
4 Current reference architecture . 42
4.1 General . 42
4.2 Overview . 43
4.3 SCADA interfaces . 45
4.3.1 General . 45
4.3.2 Data transformation via gateways and adapters . 46
4.3.3 Harmonization of the data models . 47
4.4 Inter-control centre data links . 47
4.5 EMS applications. 47
4.6 DMS applications and external IT applications. 48
4.6.1 General . 48
4.6.2 Substation/field devices . 48
5 Abstract modelling in TC 57 . 48
5.1 General . 48
5.2 Common Information Model (CIM) and Component Interface Specifications
(CIS) . 49
5.2.1 CIM . 49
5.2.2 CIM classes and relationships . 53
5.2.3 CIS . 55
5.2.4 Interface Reference Model (IRM) . 55
5.3 IEC 61850 data modelling, ACSI and SCL . 55
5.3.1 General . 55
5.3.2 IEC 61850 ACSI . 57
5.3.3 SCL modelling language . 58
5.4 TASE.2. 61
5.5 Data modelling techniques used . 61
5.5.1 IEC 61850 series . 61
5.5.2 IEC 61968 series, IEC 61970 series . 61
5.6 Service model techniques used . 62
5.6.1 IEC 61850 series . 62
5.6.2 IEC 61968 series . 62
5.6.3 IEC 61970 series . 63
5.7 Reconciling CIM and IEC 61850 standards via a harmonized model . 63
5.7.1 General . 63
5.7.2 Use cases and interfaces . 64

– 4 – TR 62357-1 © IEC:2012(E)
5.7.3 Summary of harmonized model reconciliation recommendations . 64
6 Technology mappings for TC 57 standards . 69
6.1 General . 69
6.2 Use of XML . 70
6.2.1 General . 70
6.2.2 IEC 61850 SCL use of XML . 70
6.2.3 IEC 61968 and IEC 61970 XML based on the CIM . 72
6.2.4 Reconciling the use of XML . 72
7 Strategic use of reference architecture for harmonization and new work items. 73
7.1 General . 73
7.2 Use of common object modelling language and rules . 73
7.3 Harmonization at model boundaries . 73
7.4 Resolution of model differences . 74
7.5 Basis of a future vision for TC 57 . 74
7.6 Process of starting new work in TC 57 . 74
8 Future reference architecture for power system information exchange . 75
8.1 General . 75
8.2 Vision statement . 75
8.3 Fundamental architecture principles . 75
8.4 Strategy . 76
8.4.1 General . 76
8.4.2 Information model . 76
8.4.3 Business context . 77
8.4.4 Interfaces . 77
8.4.5 Service model . 77
8.4.6 Industry trends to consider . 77
8.4.7 User awareness and usability . 79
8.4.8 CIM modelling technology and language strategy . 79
8.5 Vision for the next generation of CIM and related standards . 82
8.5.1 General . 82
8.5.2 Information layer . 83
8.5.3 Contextual layer . 84
8.5.4 Message assembly layer . 84
8.5.5 Exchange schema layer . 85
8.5.6 Concrete messages and the four layer architecture . 85
8.5.7 Next steps . 87
8.6 IEC 61850 standards strategy . 87
8.6.1 General . 87
8.6.2 Seamless profile concept . 87
9 Conclusion . 88
10 Acknowledgements . 88
Annex A (informative) Object models and mappings within TC 57 . 89
Annex B (informative) Comparison of circuit-breaker models within TC 57 . 91
Annex C (informative) Strategic vision from the Intelligrid architecture . 103
Annex D (informative) CIM/IEC 61850 mapping recommendations . 108
Bibliography . 110

TR 62357-1 © IEC:2012(E) – 5 –
Figure 1 – Application of TC 57 standards to a power system . 14
Figure 2 – TC 57 organization and formal liaisons . 15
Figure 3 – Communication interface architecture for IEC 61850 . 25
Figure 4 – EMS-API standards as an integration framework . 28
Figure 5 – Distribution management system with IEC 61968 compliant interface
architecture. 29
Figure 6 – IEC 61968 Interface Reference Model (IRM) . 30
Figure 7 – Interrelationship of IEC 62351 security standards and the TC 57 protocols . 31
Figure 8 – Management of two infrastructures . 33
Figure 9 – Information infrastructure underlying power infrastructure . 33
Figure 10 – Framework for deregulated energy market communications . 34
Figure 11 – Energy market communication over the Internet . 35
Figure 12 – DER interactions in electric power system operations . 37
Figure 13 – DER management interactions . 39
Figure 14 – Structure of a hydropower plant . 40
Figure 15 – Current reference architecture for power system information exchange . 44
Figure 16 – SCADA data interfaces . 46
Figure 17 – Common Information Model (CIM) top-level packages . 50
Figure 18 – IEC 61970 CIM packages . 51
Figure 19 – IEC 61968 CIM packages . 52
Figure 20 – IEC 62325 CIM packages . 53
Figure 21 – IEC 61850 data modelling . 56
Figure 22 – ACSI client/server model . 57
Figure 23 – Use of SCL files to exchange IED configuration data . 58
Figure 24 – SCL object model . 60
Figure 25 – Proposed changes to the substation equipment UML model . 65
Figure 26 – Proposed linkage of IEC 61850 classes to CIM PSR classes in UML . 66
Figure 27 – Overview of SCL schema . 70
Figure 28 – Vision for next generation CIM and related standards . 82
Figure 29 – Role of architecture layers in message payload definition. 86
Figure B.1 – IEC 61970 CIM model for a circuit-breaker . 92
Figure B.2 – Simple network example with two breakers . 93
Figure B.3 – Simple network connectivity modelled with CIM topology . 93
Figure B.4 – CIM model for location of breaker as electrical device and the physical
asset performing the device’s role. 94
Figure B.5 – Top of asset hierarchy . 95
Figure B.6 – Types of document relationships inherited by all assets . 96
Figure B.7 – Activity records associated with a circuit-breaker . 97
Figure B.8 – Single line view of circuit-breaker . 100
Figure B.9 – Communications and IEC view . 101
Figure C.1 – Power system and information infrastructures . 105

– 6 – TR 62357-1 © IEC:2012(E)
Table 1 – CIM and IEC 61850 naming attributes . 69
Table A.1 – TC 57 object models . 89
Table A.2 – Service capabilities of IEC 61850, TASE.2, and the verbs of IEC 61968 . 90

TR 62357-1 © IEC:2012(E) – 7 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
POWER SYSTEMS MANAGEMENT AND ASSOCIATED
INFORMATION EXCHANGE –
Part 1: Reference architecture

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
The main task of IEC technical committees is to prepare International Standards. However, a
technical committee may propose the publication of a technical report when it has collected
data of a different kind from that which is normally published as an International Standard, for
example "state of the art".
IEC 62357-1, which is a technical report, has been prepared by IEC technical committee 57:
Power systems management and associated information exchange.
This first edition cancels and replaces the first edition of IEC 62357 published in 2003 and
constitutes a technical revision. This edition includes the following significant technical
changes with respect to the previous edition:
a) update of the description of the various standards activities within TC 57 and the way they
individually and collectively contribute to meeting the objectives of TC 57;

– 8 – TR 62357-1 © IEC:2012(E)
b) update of the areas where harmonization of existing standards within TC 57 is needed and
provision of detailed recommendations regarding harmonization of the
CIM IEC 61968/61970 and IEC 61850 standards;
c) definition of a new layered architecture to help direct longer term goals and activities to
ensure compatibility of all new standards developed in TC 57;
d) alignment of the architecture on other internationally recognized architecture standards,
such as the UN/CEFACT Core Components Technical Specification;
e) incorporation of lessons learned during development of the current standards and their
application on actual utility projects;
f) provision of new guidance on the role of TC 57 standards in the Smart Grid.
The text of this technical report is based on the following documents:
Enquiry draft Report on voting
57/1184/DTR 57/1255/RVC
Full information on the voting for the approval of this technical report can be found in the
report on voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts in the IEC 62357 series, published under the general title Power systems
management and associated information exchange, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
A bilingual version of this publication may be issued at a later date.

IMPORTANT – The 'colour inside' logo on the cover page of this publication
indicates that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
TR 62357-1 © IEC:2012(E) – 9 –
INTRODUCTION
0.1 General
The objectives of IEC/TR 62357-1 are to
– provide a framework to show how the various standardisation activities within IEC
Technical Committee 57 relate to each other and how they individually and collectively
contribute to meeting the objectives of IEC Technical Committee 57, and
– develop a strategy to combine and harmonize the work of these various activities to help
facilitate a single, comprehensive plan for deployment of these standards in product
development and system implementations.
IEC/TR 62357-1 provides updates and defines a layered reference architecture to help direct
longer term goals and activities, specifically to ensure compatibility of all new standards
developed in TC 57 by benefitting from lessons learned during development of the current
standards and their application on actual utility projects as well as through application of other
internationally recognized architecture standards, such as the UN/CEFACT Core Components
Technical Specification.
The second edition of IEC 62357-1 currently being prepared will reflect the progress recently
achieved from the international Smart Grid (SG) initiatives and the CIGRE D2.24 large system
architecture vision. This second edition will also reflect the most recent editions of the TC 57
standards including IEC 61850 series and IEC 61968 series, IEC 61970 series, and
IEC 62325 series.
0.2 Objectives and overview of this technical report
0.2.1 Overview
IEC TC 57 is chartered with developing standards for electric power system management and
associated information exchange in the areas of generation, transmission and distribution
real-time operations and planning as well as information exchange to support wholesale
energy market operations. This technical report has three objectives with respect to TC 57’s
current and future work. It also has a fourth objective regarding the role of TC 57 standards in
development and implementation of the Smart Grid.
0.2.2 Existing TC 57 standards and architecture
The first objective of this technical report is to provide a reference architecture to show how
the various existing standards activities within IEC TC 57 relate to each other today and how
they individually and collectively contribute to meeting the objectives of TC 57. Clause 3
describes each of the working groups and their current scope of work, while Clause 4 shows
how all the standards developed to date fit into an overall architecture
0.2.3 Areas for harmonization
The second objective is to identify areas where harmonization between TC 57 standards is
needed and to suggest possible approaches to achieve it in order to facilitate a single,
comprehensive, optimal plan for deployment of these standards in product development and
system implementations. Clause 5 describes the data modelling and service definition
approaches currently used in TC 57. Clause 6 describes way these modelling standards and
services are mapped to concrete technologies, while Clause 7 discusses the harmonization
needed to ensure that these existing modelling and technology mapping standards are
compatible, if not totally integrated.

– 10 – TR 62357-1 © IEC:2012(E)
0.2.4 Future vision for TC 57 standards architecture
The third objective is to define a vision for the future reference architecture that will help
direct longer term goals and activities. More specifically the goal is to ensure compatibility of
all new standards developed in TC 57 by benefitting from lessons learned during development
of the current standards and their application on actual utility projects as well as through
application of other internationally recognized architecture standards, such as the
UN/CEFACT Core Components Technical Specification.
Clause 8 defines the fundamental architecture principles established to guide the structure of
new standards work, specifically proposing a layered architecture that recognizes
internationally accepted concepts for a layered architecture including an abstract information
model, a business context layer, message assembly layer, and an implementation or
technology mapping layer. Clause 9 discusses the conclusions.
0.2.5 Role of TC 57 standards in the smart grid
The fourth objective is to provide an overview of the TC 57 standards and their role in the
Smart Grid. Now that the TC 57 standards, such as the IEC 61968 series, IEC 61970 series
and IEC 61850 series, have been recognized as pillars for realization of the Smart Grid
objectives of interoperability and device management, it is imperative that a correct
understanding of these standards and their application be made available to the key
stakeholders and all other interested parties involved in implementing the Smart Grid.
0.3 Rationale
The need for this technical report was motivated by three major factors:
a) there are multiple independent standards initiatives that need to be coordinated and
harmonized to facilitate information exchange between systems using these various
standards;
b) there is a need to have a comprehensive vision of how to deploy these standards for
actual system implementations and integration efforts;
c) there needs to be a vision of the future so that additional work can take into account the
evolving communications and modelling technologies, and can be incorporated within a
clearly defined architectural framework.
There are several different initiatives within TC 57, each dealing with a selected part of real-
time operations and planning. Each has a specific objective and may have sufficient breadth
of scope to provide the bulk of the relevant standards needed for product vendors to develop
products based on those standards.
0.4 Trend toward model driven architectures and integration
In today’s utility enterprise, where information exchange between the various generation,
distributed resource, transmission, and distribution management systems, as well as
customer systems and other IT systems is not only desirable but necessary, each system
plays the role of either the supplier or consumer of information, or more typically both. That
means that both data semantics and syntax need to be preserved across system boundaries,
where system boundaries in this context are interfaces where data is made publicly
accessible to other systems or where requests for data residing in other systems are initiated.
In other words, the “what” of the information exchange is actually much more important for
system integration purposes than “how” the data is transported between systems.
Most previous efforts to define system architectures have dealt primarily with the how (i.e.,
definition of protocols for transporting the data), with a focus on utilizing as many existing ISO
or TCP/IP standards as possible to provide the various layers in the ISO OSI seven-layer

TR 62357-1 © IEC:2012(E) – 11 –
reference model for protocol profiles. However, the increasing use of object modelling
techniques to define the data for information exchange within the different standards
initiatives has properly shifted the focus away from the how to the what. Of even more
importance, this trend has resulted in the separation of the data from the protocol standards,
creating a new layer of abstraction for the data model as well as the data exchange methods
that is independent of the underlying infrastructure. The consequence of this is that a common
data model and a few generic data-driven interface patterns can be used for all information
exchange independent of the underlying protocols selected for a given system
implementation. This new architecture is known as a Model-Driven Architecture (MDA), or
when applied to integration of systems and applications, as Model-Driven Integration (MDI).
Actual implementations can then take advantage of the current industry architectural trends,
such as Service Oriented Architectures (SOA) and the use of Web services.
Standardization efforts within TC 57 began several years prior to development of the
MDA/MDI architectural concepts. As a result, there was little or no collaboration between
working groups. Each working group chose its own modelling language/notation and more
importantly generated their own object and service model definitions. This was not done
intentionally, and in fact each initiative had perfectly good reasons for their choices given the
limited scope of their domain of application. But the consequence is that instead of one object
model for each physical entity in the generation, transmission and distribution operations
domains being standardized, at least two or more object models exist in most cases with
different definitions for classes, attributes, data types, and relationships between classes.
Furthermore, in most cases different modelling languages have been used as well.
0.5 Purpose of the reference architecture
To achieve the first objective of this technical report, a reference architecture for power
system information exchange is defined to describe all the existing object models, services,
and protocols within TC 57 and how they relate to each other. Then, to meet the second
objective, a strategy is developed to show where harmonization is needed, and if possible, to
recommend how to achieve a common model. Where changes cannot be made due to
maturity of standards, then recommendations for adapters to make the necessary
transformations between models are made. The third objective of this technical report is
achieved by defining a new future reference architecture that recognizes the importance of a
single, internally consistent semantic layer to avoid unnecessary seams (i.e., the concept of a
seamless architecture), while facilitating information exchange over a variety of industry-
standard transport infrastructures. This new reference architecture provides a framework for
growth and incorporation of new, evolving technologies without invalidating the existing
standards developed by TC 57.
0.6 Scope of reference architecture
0.6.1 General
Originally the charter and title of TC 57 was "Power system control and associated
telecommunications". The focus was on developing different protocol standards to address
the data communications requirements of different parts of power system control, such as
data communications over low-speed serial lines, distribution line carrier protocols, and inter-
control center communications protocols.
Later as the scope of the TC 57 work broadened to include data exchange between
applications within an energy management system as well as inter-computer system data
exchange between distribution management systems and deregulated energy market
communications, the charter was changed to "Power system management and associated
information exchange", so that the focus shifted from lower lever protocol development to
___________
1 The original EPRI UCA project, for example, had the focus of settling on the use of MMS and a few standard
profiles for transporting data rather than on the semantics of information transfer between systems.

– 12 – TR 62357-1 © IEC:2012(E)
development of more abstract data models and generic interfaces at higher levels in the
architecture. This shift resulted in the creation of new working groups to address the new
business functions embraced by the new TC 57 charter, which includes:
• energy management,
• SCADA and network operation,
• substation protection, monitoring, and control,
• distribution automation,
• distributed energy resources (DER),
• demand response and load control,
• meter reading and control,
• customers,
• work,
• network expansion planning,
• operational planning and optimization,
• maintenance and construction,
• records and asset management,
• market operations,
• reservations,
• financial,
• energy scheduling.
0.6.2 IEC standards included in reference architecture
The scope of the reference architecture for power system information exchange embraces all
these areas from both the abstract information modelling perspective (i.e., platform
independent models) as well as the technology mappings for implementation (i.e., platform
specific models).
Figure 1 shows where some of these standards are used in the utility operations environment.
Not all standards listed above are shown and not all end field devices/systems are shown.
More detailed descriptions and illustrations are provided in Clause 3.
The reference architecture for power system information exchange includes the following IEC
TC 57 standards (responsible working groups are shown in parentheses):
IEC 60495, Single sideband power-line carrier terminals (WG20)
IEC 60663, Planning of (single-sideband) power line carrier systems (WG20)
IEC 60870-5 (all parts), Telecontrol equipment and systems – Part 5: Transmission protocols
(WG3)
NOTE 1 IEC 60870-5 series covers reliable data acquisition and control on narrow-band serial data links or over
TCP/IP networks between SCADA masters and substations.
IEC 60870-6 (all parts), Telecontrol equipment and systems – Part 6: Telecontrol protocols
compatible with ISO standards and ITU-T recommendations (WG7)
NOTE 2 IEC 60870-6 series covers the exchange of real-time operational data between control centres over Wide
Area Networks (WANs). This series is known officially as TASE-2 and unofficially as ICCP.
IEC 61334 (all parts), Distribution automation using distribution line carrier systems (WG9)

TR 62357-1 © IEC:2012(E) – 13 –
NOTE 3 IEC 61334 series covers data communications over distribution line carrier systems.
IEC 61400-25 (all parts), Wind turbines – Part 25-1: Communications for monitoring and
control of wind power plants
NOTE 4 IEC 61400-25 series covers monitoring and control of wind power plants and associated communicat
...