SIST EN 61850-7-1:2012

SLOVENSKI STANDARD
01-januar-2012
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Communication networks and systems for power utility automation - Part 7-1: Basic
communication structure - Principles and models
Kommunikationsnetze und -systeme für die Automatisierung in der elektrischen
Energieversorgung -- Teil 7-1: Grundlegende Kommunikationsstruktur - Grundsätze und
Modelle
Réseaux et systèmes de communication pour l'automatisation des systèmes électriques
-- Partie 7-1: Structure de communication de base - Principes et modèles
Ta slovenski standard je istoveten z: EN 61850-7-1:2011
ICS:
29.240.30 Krmilna oprema za Control equipment for electric
elektroenergetske sisteme power systems
33.200 Daljinsko krmiljenje, daljinske Telecontrol. Telemetering
meritve (telemetrija)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 61850-7-1
NORME EUROPÉENNE
October 2011
EUROPÄISCHE NORM
ICS 33.200 Supersedes EN 61850-7-1:2003

English version
Communication networks and systems for power utility automation -
Part 7-1: Basic communication structure -
Principles and models
(IEC 61850-7-1:2011)
Réseaux et systèmes de communication Kommunikationsnetze und -systeme für
pour l'automatisation des systèmes die Automatisierung in der elektrischen
électriques - Energieversorgung -
Partie 7-1: Structure de communication de Teil 7-1: Grundlegende
base - Kommunikationsstruktur -
Principes et modèles Grundsätze und Modelle
(CEI 61850-7-1:2011) (IEC 61850-7-1:2011)

This European Standard was approved by CENELEC on 2011-08-19. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the CEN-CENELEC Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the CEN-CENELEC Management Centre has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,
the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 61850-7-1:2011 E
Foreword
The text of document 57/1121/FDIS, future edition 2 of IEC 61850-7-1, prepared by IEC TC 57, Power
systems management and associated information exchange, was submitted to the IEC-CENELEC
parallel vote and approved by CENELEC as EN 61850-7-1:2011.

This document supersedes EN 61850-7-1:2003.

Compared to EN 61850-7-1:2003, EN 61850-7-1:2011 introduces:
• the model for statistical and historical statistical data,
• the concepts of proxies, gateways, LD hierarchy and LN inputs,
• the model for time synchronisation,
• the concepts behind different testing facilities,
• the extended logging function.

• the use of numbers for data extension,
• the use of name spaces,
• the mode and behaviour of a logical node,
• the use of range and deadbanded values,
• the access to control actions and others.

The following dates are fixed:
– latest date by which the document has to be implemented at (dop) 2012-05-19
national level by publication of an identical national
standard or by endorsement
– latest date by which the national standards conflicting with the (dow) 2014-08-19
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent
rights.
__________
Endorsement notice
The text of the International Standard IEC 61850-7-1:2011 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 61346-1 NOTE  Harmonized as EN 61346-1.
IEC 61346-2 NOTE  Harmonized as EN 61346-2.
IEC 61400 series NOTE  Harmonized in EN 61400 series (not modified).
__________
- 3 - EN 61850-7-1:2011
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year

IEC/TS 61850-2 - Communication networks and systems in - -
substations -
Part 2: Glossary
IEC 61850-3 - Communication networks and systems in EN 61850-3 -
substations -
Part 3: General requirements
IEC 61850-4 - Communication networks and systems for EN 61850-4 -
power utility automation -
Part 4: System and project management

IEC 61850-5 - Communication networks and systems in EN 61850-5 -
substations -
Part 5: Communication requirements for
functions and device models
IEC 61850-6 - Communication networks and systems for EN 61850-6 -
power utility automation -
Part 6: Configuration description language for
communication in electrical substations
related to IEDs
IEC 61850-7-2 - Communication networks and systems for EN 61850-7-2 -
power utility automation -
Part 7-2: Basic information and
communication structure - Abstract
communication service interface (ACSI)

IEC 61850-7-3 - Communication networks and systems for EN 61850-7-3 -
power utility automation -
Part 7-3: Basic communication structure -
Common data classes
IEC 61850-7-4 - Communication networks and systems for EN 61850-7-4 -
power utility automation -
Part 7-4: Basic communication structure -
Compatible logical node classes and data
object classes
IEC 61850-8-1 - Communication networks and systems for EN 61850-8-1 -
power utility automation -
Part 8-1: Specific Communication Service
Mapping (SCSM) - Mappings to MMS (ISO
9506-1 and ISO 9506-2) and to ISO/IEC
8802-3
Publication Year Title EN/HD Year
IEC 61850-9-2 - Communication networks and systems in EN 61850-9-2 -
substations -
Part 9-2: Specific Communication Service
Mapping (SCSM) - Sampled values over
ISO/IEC 8802-3
IEC 61850-10 - Communication networks and systems in EN 61850-10 -
substations -
Part 10: Conformance testing
ISO/IEC 8802-3 - Information technology - Telecommunications - -
and information exchange between systems -
Local and metropolitan area networks -
Specific requirements -
Part 3: Carrier sense multiple access with
collision detection (CSMA/CD) access method
and physical layer specifications

ISO/IEC 8825 Series Information technology - ASN.1 encoding - -
rules
ISO 9506-1 - Industrial automation systems - Manufacturing - -
Message Specification -
Part 1: Service definition
ISO 9506-2 - Industrial automation systems - Manufacturing - -
Message Specification -
Part 2: Protocol specification

IEC 61850-7-1 ®
Edition 2.0 2011-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Communication networks and systems for power utility automation –
Part 7-1: Basic communication structure – Principles and models

Réseaux et systèmes de communication pour l'automatisation des systèmes
électriques –
Partie 7-1: Structure de communication de base – Principes et modèles

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XG
ICS 33.200 ISBN 978-2-88912-555-5

– 2 – 61850-7-1  IEC:2011
CONTENTS
FOREWORD . 8
INTRODUCTION . 10
1 Scope . 11
2 Normative references . 12
3 Terms and definitions . 13
4 Abbreviated terms . 13
5 Overview of the IEC 61850 series concepts . 14
5.1 Objective . 14
5.2 Topology and communication functions of substation automation systems . 16
5.3 The information models of substation automation systems . 16
5.4 Applications modelled by logical nodes defined in IEC 61850-7-4 . 18
5.5 The semantic is attached to data . 21
5.6 The services to exchange information . 23
5.7 Services mapped to concrete communication protocols . 24
5.8 The configuration of the automation system . 25
5.9 Summary . 26
6 Modelling approach of the IEC 61850 series . 27
6.1 Decomposition of application functions and information . 27
6.2 Creating information models by stepwise composition . 28
6.3 Example of an IED composition . 31
6.4 Information exchange models . 31
6.4.1 General . 31
6.4.2 Output model . 33
6.4.3 Input model . 36
6.4.4 Model for statistical and historical statistical data . 46
6.4.5 Model for system functions . 50
7 Application view . 52
7.1 General . 52
7.2 First modelling step – Logical nodes and data . 53
7.3 Mode and behaviour of a logical node . 57
7.4 Use of measurement ranges and alarms for supervision functions . 57
7.5 Data used for limiting the access to control actions . 58
7.6 Data used for blocking functions described by logical nodes . 58
7.7 Data used for logical node inputs/outputs blocking (operational blocking) . 58
7.7.1 General . 58
7.7.2 Blocking incoming commands . 59
7.7.3 Blocking process outputs . 59
7.7.4 Blocking oscillating inputs. 60
7.8 Data used for testing . 60
7.8.1 General . 60
7.8.2 Multicast signals used for simulation . 60
7.8.3 Input signals used for testing . 61
7.8.4 Test mode . 62
7.9 Logical node used for extended logging functions . 62
8 Device view . 63
8.1 General . 63

61850-7-1  IEC:2011 – 3 –
8.2 Second modelling step – logical device model . 64
8.2.1 The logical device concept . 64
8.2.2 The device nameplate . 65
8.2.3 Gateways and proxies . 66
8.2.4 Logical devices for monitoring external device health . 67
8.2.5 Logical devices management hierarchy . 68
9 Communication view . 70
9.1 General . 70
9.2 The service models of the IEC 61850 series . 70
9.3 The virtualisation . 72
9.4 Basic information exchange mechanisms . 73
9.5 The client-server building blocks . 75
9.5.1 Server . 75
9.5.2 Client-server roles . 76
9.6 Logical nodes communicate with logical nodes . 77
9.7 Interfaces inside and between devices . 78
10 Where physical devices, application models and communication meet . 79
11 Relationships between IEC 61850-7-2, IEC 61850-7-3 and IEC 61850-7-4 . 80
11.1 Refinements of class definitions . 80
11.2 Example 1 – Logical node and data class . 81
11.3 Example 2 – Relationship of IEC 61850-7-2, IEC 61850-7-3, and IEC 61850-7-4 . 85
12 Formal specification method . 86
12.1 Notation of ACSI classes . 86
12.2 Class modelling . 87
12.2.1 Overview . 87
12.2.2 Common data class . 88
12.2.3 Logical node class . 91
12.3 Service tables . 92
12.4 Referencing instances . 93
13 Name spaces . 96
13.1 General . 96
13.2 Name spaces defined in the IEC 61850-7-x series . 97
13.3 Specification of name spaces . 101
13.3.1 General . 101
13.3.2 Specification . 101
13.4 Attributes for references to name spaces . 102
13.4.1 General . 102
13.4.2 Attribute for logical device name space (ldNs) . 103
13.4.3 Attribute for logical node name space (lnNs). 103
13.4.4 Attribute for data name space (dataNs) . 104
13.4.5 Attribute for common data class name space (cdcNs) . 104
14 Common rules for new version of classes and for extension of classes. 104
14.1 General . 104
14.2 Basic rules . 104
14.3 Rules for LN classes . 105
14.3.1 Use of standardized LN classes . 105
14.3.2 Extensions to standardized LN classes made by third parties . 106
14.3.3 New LN classes . 106

– 4 – 61850-7-1  IEC:2011
14.3.4 New versions of standardized LN classes made by name space
owners . 107
14.4 Rules for common data classes and control block classes . 107
14.4.1 New common data classes and control block classes . 107
14.4.2 New versions of standardized common data classes . 107
14.4.3 New versions of control block classes. 107
14.5 Multiple instances of LN classes for dedicated and complex functions . 108
14.5.1 Example for time overcurrent . 108
14.5.2 Example for PDIS . 108
14.5.3 Example for power transformer . 108
14.5.4 Example for auxiliary network . 108
14.6 Specialisation of data by use of number extensions . 109
14.7 Examples for new LNs . 109
14.8 Example for new Data . 109
Annex A (informative) Overview of logical nodes and data . 110
Annex B (informative) Allocation of data to logical nodes . 113
Annex C (informative) Use of the substation configuration language (SCL) . 116
Annex D (informative) Applying the LN concept to options for future extensions . 118
Annex E (informative) Relation between logical nodes and PICOMs . 123
Annex F (informative) Mapping the ACSI to real communication systems . 124
Bibliography . 132

Figure 1 – Relations between modelling and mapping parts of the IEC 61850 series . 14
Figure 2 – Sample substation automation topology . 16
Figure 3 – Modelling approach (conceptual) . 17
Figure 4 – Logical node information categories . 20
Figure 5 – Build-up of devices (principle) . 20
Figure 6 – Position information depicted as a tree (conceptual) . 21
Figure 7 – Service excerpt . 23
Figure 8 – Example of communication mapping . 25
Figure 9 – Summary . 26
Figure 10 – Decomposition and composition process (conceptual) . 27
Figure 11 – XCBR1 information depicted as a tree . 30
Figure 12 – Example of IED composition . 31
Figure 13 – Output and input model (principle) . 32
Figure 14 – Output model (step 1) (conceptual) . 33
Figure 15 – Output model (step 2) (conceptual) . 34
Figure 16 – GSE output model (conceptual) . 34
Figure 17 – Setting data (conceptual) . 35
Figure 18 – Input model for analogue values (step 1) (conceptual) . 37
Figure 19 – Range and deadbanded value (conceptual) . 38
Figure 20 – Input model for analogue values (step 2) (conceptual) . 39
Figure 21 – Reporting and logging model (conceptual). 40
Figure 22 – Data set members and reporting . 41
Figure 23 – Buffered report control block (conceptual) . 42

61850-7-1  IEC:2011 – 5 –
Figure 24 – Buffer time . 43
Figure 25 – Data set members and inclusion-bitstring . 44
Figure 26 – Log control block (conceptual). 44
Figure 27 – Peer-to-peer data value publishing model (conceptual) . 45
Figure 28 – Conceptual model of statistical and historical statistical data (1) . 47
Figure 29 – Conceptual model of statistical and historical statistical data (2) . 49
Figure 30 – Concept of the service tracking model – Example: control service tracking . 51
Figure 31 – Real world devices . 52
Figure 32 – Logical nodes and data (IEC 61850-7-2) . 53
Figure 33 – Simple example of modelling . 55
Figure 34 – Basic building blocks . 55
Figure 35 – Logical nodes and PICOM . 56
Figure 36 – Logical nodes connected (outside view in IEC 61850-7-x series) . 56
Figure 37 – Mode and behaviour data (IEC 61850-7-4) . 57
Figure 38 – Data used for limiting the access to control actions (IEC 61850-7-4) . 58
Figure 39 – Data used for logical node inputs/outputs blocking (IEC 61850-7-4) . 59
Figure 40 – Data used for receiving simulation signals . 60
Figure 41 – Example of input signals used for testing . 61
Figure 42 – Test mode example . 62
Figure 43 – Logical node used for extended logging functions (GLOG) . 63
Figure 44 – Logical device building block . 64
Figure 45 – Logical devices and LLN0/LPHD . 65
Figure 46 – The common data class DPL . 66
Figure 47 – Logical devices in proxies or gateways . 67
Figure 48 – Logical devices for monitoring external device health . 68
Figure 49 – Logical devices management hierarchy . 69
Figure 50 – ACSI communication methods . 71
Figure 51 – Virtualisation . 73
Figure 52 – Virtualisation and usage . 73
Figure 53 – Information flow and modelling . 74
Figure 54 – Application of the GSE model . 74
Figure 55 – Server building blocks . 75
Figure 56 – Interaction between application process and application layer
(client/server) . 76
Figure 57 – Example for a service . 76
Figure 58 – Client/server and logical nodes . 77
Figure 59 – Client and server roles . 77
Figure 60 – Logical nodes communicate with logical nodes . 78
Figure 61 – Interfaces inside and between devices . 79
Figure 62 – Component hierarchy of different views (excerpt) . 80
Figure 63 – Refinement of the DATA class . 81
Figure 64 – Instances of a DATA class (conceptual) . 84
Figure 65 – Relation between parts of the IEC 61850 series . 85

– 6 – 61850-7-1  IEC:2011
Figure 66 – Abstract data model example for IEC 61850-7-x . 87
Figure 67 – Relation of TrgOp and Reporting . 90
Figure 68 – Sequence diagram . 92
Figure 69 – References . 93
Figure 70 – Use of FCD and FCDA . 94
Figure 71 – Object names and object reference . 95
Figure 72 – Definition of names and semantics . 96
Figure 73 – One name with two meanings . 97
Figure 74 – Name space as class repository . 98
Figure 75 – All instances derived from classes in a single name space . 99
Figure 76 – Instances derived from multiple name spaces . 100
Figure 77 – Inherited name spaces . 100
Figure 78 – Basic extension rules diagram . 105
Figure B.1 – Example for control and protection LNs combined in one physical device . 113
Figure B.2 – Merging unit and sampled value exchange (topology) . 114
Figure B.3 – Merging unit and sampled value exchange (data) . 114
Figure C.1 – Application of SCL for LNs (conceptual) . 116
Figure C.2 – Application of SCL for data (conceptual) . 117
Figure D.1 – Seamless communication (simplified) . 118
Figure D.2 – Example for new logical nodes . 119
Figure D.3 – Example for control center view and mapping to substation view . 121
Figure E.1 – Exchanged data between subfunctions (logical nodes) . 123
Figure E.2 – Relationship between PICOMS and client/server model . 123
Figure F.1 – ACSI mapping to an application layer . 124
Figure F.2 – ACSI mappings (conceptual) . 125
Figure F.3 – ACSI mapping to communication stacks/profiles . 126
Figure F.4 – Mapping to MMS (conceptual) . 126
Figure F.5 – Mapping approach . 127
Figure F.6 – Mapping detail of mapping to a MMS named variable . 128
Figure F.7 – Example of MMS named variable (process values) . 128
Figure F.8 – Use of MMS named variables and named variable list . 129
Figure F.9 – MMS information report message . 130
Figure F.10 – Mapping example . 131

Table 1 – LN groups . 18
Table 2 – Logical node class XCBR (conceptual) . 29
Table 3 – Excerpt of integer status setting . 36
Table 4 – Comparison of the data access methods . 41
Table 5 – ACSI models and services . 71
Table 6 – Logical node circuit breaker . 82
Table 7 – Controllable double point (DPC) . 83
Table 8 – ACSI class definition . 86
Table 9 – Single point status common data class (SPS) . 88

61850-7-1  IEC:2011 – 7 –
Table 10 – Quality components attribute definition . 89
Table 11 – Basic status information template (excerpt) . 89
Table 12 – Trigger option . 90
Table 13 – GenLogicalNodeClass definition . 91
Table 14 – Excerpt of logical node name plate common data class (LPL) . 103
Table 15 – Excerpt of common data class . 103
Table A.1 – Excerpt of data classes for measurands . 111
Table A.2 – List of common data classes (excerpt) . 112

– 8 – 61850-7-1  IEC:2011
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
COMMUNICATION NETWORKS AND
SYSTEMS FOR POWER UTILITY AUTOMATION –

Part 7-1: Basic communication structure –
Principles and models
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.
International Standard IEC 61850-7-1 has been prepared by IEC technical committee 57:
Power systems management and associated information exchange.
The text of this document is based on the following documents:
FDIS Report on voting
57/1121/FDIS 57/1145/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This second edition cancels and replaces the first edition published in 2003. This second
edition constitutes a technical revision.

61850-7-1  IEC:2011 – 9 –
Compared to the first edition, this second edition introduces:
• the model for statistical and historical statistical data,
• the concepts of proxies, gateways, LD hierarchy and LN inputs,
• the model for time synchronisation,
• the concepts behind different testing facilities,
• the extended logging function.
It also clarifies the following points:
• the use of numbers for data extension,
• the use of name spaces,
• the mode and behaviour of a logical node,
• the use of range and deadbanded values,
• the access to control actions and others.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts of the IEC 61850 series, under the general title: Communication networks
and systems for power utility automation 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.
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.
– 10 – 61850-7-1  IEC:2011
INTRODUCTION
This part of the IEC 61850 series provides an overview of the architecture for communication
and interactions between systems for power utility automation such as protection devices,
breakers, transformers, substation hosts etc.
This document is part of a set of specifications which details a layered communication
architecture for power utility automation. This architecture has been chosen to provide
abstract definitions of classes (representing hierarchical information models) and services
such that the specifications are independent of specific protocol stacks, implementations, and
operating systems.
The goal of the IEC 61850 series is to provide interoperability between the IEDs from different
suppliers or, more precisely, between functions to be performed by systems for power utility
automation but residing in equipment (physical devices) from different suppliers. Interoperable
functions may be those functions that represent interfaces to the process (for example, circuit
breakers) or substation automation functions such as protection functions. This part of the
IEC 61850 series uses simple examples of functions to describe the concepts and methods
applied in the IEC 61850 series.
This part of the IEC 61850 series describes the relationships between other parts of the
IEC 61850 series. Finally this part defines how interoperability is reached.
NOTE Interchangeability is the ability to replace a device from the same vendor, or from different vendors,
utilising the same communication interface and as a minimum, providing the same functionality, with no impact on
the rest of the system. If differences in functionality are accepted, the exchange may also require some changes
somewhere else in the system. Interchangeability implies a standardisation of functions and, in a strong sense, of
devices which are outside the scope of this standard. Interchangeability is outside the scope, but it will be
supported following this standard for interoperability.
This part of the IEC 61850 series is intended for all stakeholders of standar
...