Instrument Transformers - Part 9: Digital interface for instrument transformers (IEC 61869-9:2016)

This part of IEC 61869 is a product family standard applicable to instrument transformers with
digital output. The product standard is composed of IEC 61869-1 and IEC 61869-6, in addition
to this standard and the relevant product specific standards in the IEC 61869 series (Part 7,
Part 8, Part 12, Part 13, Part 14, and Part 15).
This standard defines requirements for digital communications of instrument transformer
measurements. It is based on the IEC 61850 series, UCA international users group document
Implementation guideline for digital interface to instrument transformers using IEC 61850-9-2,
and the relevant parts of IEC 60044-8 that are replaced by this standard. It includes additional
improvements including the IEC 61588 network based time synchronization.

Messwandler - Teil 9: Digitale Schnittstelle für Messwandler (IEC 61869-9:2016)

Transformateurs de mesure - Partie 9: Interface numérique pour les transformateurs de mesure (IEC 61869-9:2016)

L'IEC 61869-9:2016 est une norme de familles de produits applicable aux transformateurs de mesure à sortie numérique. La norme de produit est composée de l'IEC 61869 1 et de l'IEC 61869 6, en plus de la présente norme et des normes spécifiques aux produits correspondants dans la série IEC 61869 (Partie 7, Partie 8, Partie 12, Partie 13, Partie 14 et Partie 15). La présente norme définit les exigences en matière de communication numérique des mesurages de transformateurs de mesure. Elle repose sur la série IEC 61850, sur le document Implementation guideline for digital interface to instrument transformers using IEC 61850-9-2 de l’UCA International Users Group et sur les parties correspondantes de l'IEC 60044-8 qui sont remplacées par la présente norme. Elle inclut des améliorations supplémentaires, notamment la synchronisation basée sur le réseau de l'IEC 61588. Cette première édition remplace les exigences spécifiques correspondantes de l'IEC 60044-8, parue en 2002. La présente Norme internationale contient les exigences spécifiques relatives aux transformateurs de mesure électroniques de faible puissance (LPIT) équipés d’une sortie numérique. La présente publication contient un fichier joint sous la forme de fichier .xml. Ce fichier est destiné à être utilisé en complément de la présente publication et n’en fait pas partie intégrante.

Instrumentni transformatorji - 9. del: Digitalni vmesnik za instrumentne transformatorje (IEC 61869-9:2016)

Ta del standarda IEC 61869 je standard družine izdelkov, ki se uporablja za merilne transformatorje z digitalnim izhodom. Standard za izdelek je sestavljen iz standardov IEC 61869-1 in IEC 61869-6 ter se uporablja poleg tega standarda in ustreznih standardov za posamezne izdelke iz skupine standardov IEC 61869 (7., 8., 12., 13., 14. in 15. del).
Ta standard določa zahteve za digitalne komunikacije meritev merilnih transformatorjev. Temelji na skupini standardov IEC 61850, dokumentu mednarodne skupine uporabnikov UCA Smernice za implementacijo digitalnega vmesnika do merilnega transformatorja ob uporabi standarda IEC 61850-9-2 in ustreznih delih standarda IEC 60044-8, ki jih nadomešča ta standard. Vključuje tudi dodatne izboljšave, vključno z omrežno časovno sinhronizacijo iz standarda IEC 61588.

General Information

Status
Published
Publication Date
19-Aug-2019
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
24-Jul-2019
Due Date
28-Sep-2019
Completion Date
20-Aug-2019

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SLOVENSKI STANDARD
SIST EN IEC 61869-9:2019
01-oktober-2019
Nadomešča:
SIST EN 60044-8:2003
Instrumentni transformatorji - 9. del: Digitalni vmesnik za instrumentne
transformatorje (IEC 61869-9:2016)

Instrument Transformers - Part 9: Digital interface for instrument transformers (IEC

61869-9:2016)
Messwandler - Teil 9: Digitale Schnittstelle für Messwandler (IEC 61869-9:2016)

Transformateurs de mesure - Partie 9: Interface numérique pour les transformateurs de

mesure (IEC 61869-9:2016)
Ta slovenski standard je istoveten z: EN IEC 61869-9:2019
ICS:
17.220.20 Merjenje električnih in Measurement of electrical
magnetnih veličin and magnetic quantities
SIST EN IEC 61869-9:2019 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN IEC 61869-9:2019
---------------------- Page: 2 ----------------------
SIST EN IEC 61869-9:2019
EUROPEAN STANDARD EN IEC 61869-9
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2019
ICS 17.220.20 Supersedes EN 60044-8:2002 (partially)
English Version
Instrument transformers - Part 9: Digital interface for instrument
transformers
(IEC 61869-9:2016)

Transformateurs de mesure - Partie 9: Interface numérique Messwandler - Teil 9: Digitale Schnittstelle für Messwandler

pour les transformateurs de mesure (IEC 61869-9:2016)
(IEC 61869-9:2016)

This European Standard was approved by CENELEC on 2016-06-01. 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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 61869-9:2019 E
---------------------- Page: 3 ----------------------
SIST EN IEC 61869-9:2019
EN IEC 61869-9:2019 (E)
European foreword

The text of document 38/502/FDIS, future edition 1 of IEC 61869-9, prepared by IEC/TC 38

"Instrument transformers" was submitted to the IEC-CENELEC parallel vote and approved by

CENELEC as EN IEC 61869-9:2019.
The following dates are fixed:

• latest date by which the document has to be implemented at national (dop) 2020-01-05

level by publication of an identical national standard or by endorsement

• latest date by which the national standards conflicting with the (dow) 2022-07-05

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 shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN 60044-8:2002 (partially).
Endorsement notice

The text of the International Standard IEC 61869-9:2016 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 60044-7:1999 NOTE Harmonized as EN 60044-7:2000 (not modified)
IEC 60044-8:2002 NOTE Harmonized as EN 60044-8:2002 (not modified)
IEC 61850 (series) NOTE Harmonized as EN 61850 (series)
IEC 61850-5:2013 NOTE Harmonized as EN 61850-5:2013 (not modified)
IEC 61850-8-1 NOTE Harmonized as EN 61850-8-1
IEC 61850-10 NOTE Harmonized as EN 61850-10
IEC 61869 (series) NOTE Harmonized as EN 61869 (series)
IEC 62271-3 NOTE Harmonized as EN 62271-3
---------------------- Page: 4 ----------------------
SIST EN IEC 61869-9:2019
EN IEC 61869-9:2019 (E)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements 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 1 Where an International Publication has been modified by common modifications, indicated by (mod), the relevant

EN/HD applies.

NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:

www.cenelec.eu.
Clause 2 of IEC 61869-6:2016 is applicable with the following additions:
Publication Year Title EN/HD Year
IEC 61588 2009 Precision clock synchronization protocol for - -
networked measurement and control
systems
IEC 61850-6 2009 Communication networks and systems for EN 61850-6 2010
power utility automation - Part 6:
Configuration description language for
communication in electrical substations
related to IEDs
IEC 61850-7-1 2011 Communication networks and systems for EN 61850-7-1 2011
power utility automation - Part 7-1: Basic
communication structure - Principles and
models
IEC 61850-7-2 2010 Communication networks and systems for EN 61850-7-2 2010
power utility automation - Part 7-2: Basic
information and communication structure -
Abstract communication service interface
(ACSI)
IEC 61850-7-3 2010 Communication networks and systems for EN 61850-7-3 2011
power utility automation - Part 7-3: Basic
communication structure - Common data
classes
IEC 61850-8-1 2011 Communication networks and systems for EN 61850-8-1 2011
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
IEC 61850-9-2 2011 Communication networks and systems for EN 61850-9-2 2011
power utility automation - Part 9-2: Specific
communication service mapping (SCSM) -
Sampled values over ISO/IEC 8802-3
IEC 61850-10 2012 Communication networks and systems for EN 61850-10 2013
---------------------- Page: 5 ----------------------
SIST EN IEC 61869-9:2019
EN IEC 61869-9:2019 (E)
Publication Year Title EN/HD Year
power utility automation - Part 10:
Conformance testing
IEC 61869-6 2016 Instrument transformers - Part 6: Additional EN 61869-6 2016
general requirements for low-power
instrument transformers
IEC/IEEE 61850-9-3 2016 Communication networks and systems for - -
power utility automation - Part 9-3:
Precision time protocol profile for power
utility automation
UCA (International - Implementation guideline for digital
Users Group interface to instrument transformers using
IEC 61850-9-2
---------------------- Page: 6 ----------------------
SIST EN IEC 61869-9:2019
IEC 61869-9
Edition 1.0 2016-04
INTERNATIONAL
STANDARD
colour
inside
Instrument transformers –
Part 9: Digital interface for instrument transformers
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 17.220.20 ISBN 978-2-8322-3331-3

Warning! Make sure that you obtained this publication from an authorized distributor.

® Registered trademark of the International Electrotechnical Commission
---------------------- Page: 7 ----------------------
SIST EN IEC 61869-9:2019
– 2 – IEC 61869-9:2016  IEC 2016
CONTENTS

FOREWORD ......................................................................................................................... 4

INTRODUCTION ................................................................................................................... 7

1 Scope .......................................................................................................................... 12

2 Normative references ................................................................................................... 12

3 Terms and definitions ................................................................................................... 13

3.5 Terms and definitions related to other ratings ...................................................... 13

3.7 Index of abbreviations ....................................................................................... 13

4 Normal and special service conditions ........................................................................... 14

5 Ratings ........................................................................................................................ 14

5.6 Rated accuracy class ........................................................................................ 14

5.901 Performance requirements ................................................................................ 15

6 Design and construction ............................................................................................... 16

6.901 Technological boundaries .................................................................................. 16

6.901.1 Interface point ..................................................................................... 16

6.901.2 Digital output interface ......................................................................... 16

6.901.3 Human-machine interface .................................................................... 16

6.902 Electrical requirements ...................................................................................... 17

6.902.1 Frequency response requirements ....................................................... 17

6.902.2 Maximum processing delay time requirement ....................................... 17

6.903 Specification of the communications profile ....................................................... 19

6.903.1 General ............................................................................................... 19

6.903.2 Variants .............................................................................................. 19

6.903.3 Digital output sample rates .................................................................. 20

6.903.4 Logical devices .................................................................................... 21

6.903.5 Logical nodes LPHD ............................................................................ 21

6.903.6 Logical nodes LLN0 ............................................................................. 21

6.903.7 Logical nodes TCTR ............................................................................ 21

6.903.8 Logical nodes TVTR ............................................................................ 24

6.903.9 Quality ................................................................................................ 25

6.903.10 Dataset(s) ........................................................................................... 26

6.903.11 Multicast sampled value control block(s) .............................................. 27

6.903.12 Configuration of the merging unit ......................................................... 27

6.903.13 Rated conformance classes ................................................................. 28

6.904 Synchronization ................................................................................................ 34

6.904.1 General ............................................................................................... 34

6.904.2 Precision time protocol synchronization ................................................ 34

6.904.3 1PPS synchronization .......................................................................... 35

6.904.4 Sample value message SmpSynch attribute ......................................... 35

6.904.5 Holdover mode .................................................................................... 36

6.904.6 Free-running mode .............................................................................. 37

6.904.7 Time adjustments ................................................................................ 37

7 Tests ............................................................................................................................ 38

7.2 Type tests ......................................................................................................... 38

7.2.6 Test for accuracy ................................................................................. 38

7.2.901 Digital output conformance tests .......................................................... 38

7.2.902 Maximum processing delay time test .................................................... 38

---------------------- Page: 8 ----------------------
SIST EN IEC 61869-9:2019
IEC 61869-9:2016  IEC 2016 – 3 –

7.2.903 Loss of synchronization tests ............................................................... 39

7.2.904 1PPS test ............................................................................................ 39

Annex 9A (informative) Dynamic range considerations ........................................................ 40

Annex 9B (informative) Time synchronization and management example ............................ 43

Annex 9C (informative) Example merging unit ICD file ........................................................ 45

Annex 9D (informative) Test circuits for accuracy measurement .......................................... 56

Annex 9E (informative) Electronic nameplate ...................................................................... 59

Bibliography ....................................................................................................................... 60

Figure 901 – General block diagram of an electronic LPIT with digital output ......................... 8

Figure 902 – General illustration of the objects within a merging unit (example) ..................... 9

Figure 903 – Electronic LPIT with digital output (concept example) ...................................... 10

Figure 904 – Standalone merging unit ................................................................................. 11

Figure 905 – Duplex LC connector ...................................................................................... 16

Figure 906 – Maximum processing delay time ..................................................................... 17

Figure 907 – Output message timestamp point .................................................................... 19

Figure 908 – TCTR naming example ................................................................................... 23

Figure 909 – 1PPS signal waveform at the merging unit clock input ..................................... 35

Figure 910 – Time adjustment example (6 ASDU example) .................................................. 37

Figure 9A.1 – Nomogram for current ................................................................................... 41

Figure 9A.2 – Nomogram for voltage ................................................................................... 42

Figure 9B.1 – Sampled value signal processing example showing 2ASDUs per

message (F4800S2I4U4 example) ....................................................................................... 43

Figure 9D.1 – Example test circuit ....................................................................................... 56

Figure 9D.2 – Example test circuit ....................................................................................... 58

Table 901 – Maximum processing delay time limits .............................................................. 18

Table 902 – Standard sample rates ..................................................................................... 20

Table 903 – Extensions to the LPHD class .......................................................................... 21

Table 904 – AmpSv object attribute values .......................................................................... 23

Table 905 – Extensions to the TCTR class .......................................................................... 24

Table 906 – VolSv object attribute values ............................................................................ 25

Table 907 – Extensions to the TVTR class .......................................................................... 25

Table 908 – Configuration parameters of the merging unit ................................................... 28

Table 909 – Basic conformance statement .......................................................................... 29

Table 910 – ACSI models conformance statement ............................................................... 29

Table 911 – ACSI service conformance statement ............................................................... 31

Table 912 – PICS for A-Profile support ................................................................................ 33

Table 913 – PICS for T-Profile support ................................................................................ 34

---------------------- Page: 9 ----------------------
SIST EN IEC 61869-9:2019
– 4 – IEC 61869-9:2016  IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INSTRUMENT TRANSFORMERS –
Part 9: Digital interface for instrument transformers
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 61869-9 has been prepared by IEC technical committee 38:

Instrument transformers.

This first edition replaces the corresponding specific requirements previously contained in

IEC 60044-8, published in 2002.
The text of this standard is based on the following documents:
FDIS Report on voting
38/502/FDIS 38/508/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 publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

---------------------- Page: 10 ----------------------
SIST EN IEC 61869-9:2019
IEC 61869-9:2016  IEC 2016 – 5 –

A list of all parts in the IEC 61869 series, published under the general title Instrument

transformers, can be found on the IEC website.

This publication contains an attached file in the form of a .xml file. This file is intended to be

used as a complement and does not form an integral part of the publication.

This International Standard contains specific requirements for electronic low power instrument

transformers (LPIT) having a digital output.

This Part 9 is to be read in conjunction with, and is based on, IEC 61869-1:2007, General

Requirements and IEC 61869-6:2016. However, the reader is encouraged to use its most

recent edition.

This Part 9 follows the structure of IEC 61869-6 and IEC 61869-1 and supplements or

modifies their corresponding clauses/subclauses.

When a particular clause/subclause of Part 6 is not mentioned in this Part 9, that

clause/subclause applies. When this standard states “addition”, “modification” or

“replacement”, the relevant text in Part 6 is to be adapted accordingly.
When a particular clause/subclause of Part 1 is not mentioned in Part 6, that

clause/subclause applies. When part 6 states “addition”, “modification” or “replacement”, the

relevant text in Part 1 is to be adapted accordingly.

For additional clauses, subclauses, figures, tables, annexes or note, the following numbering

system is used:

– clauses, subclauses, tables, figures and notes that are numbered starting from 901 are

additional to those in Part 1;
– additional annexes are lettered 9A, 9B, etc.

An overview of the planned set of standards at the date of publication of this document is

given below. The updated list of standards issued by IEC TC38 is available at the website:

www.iec.ch
---------------------- Page: 11 ----------------------
SIST EN IEC 61869-9:2019
– 6 – IEC 61869-9:2016  IEC 2016
PRODUCT FAMILY STANDARDS PRODUCT PRODUCTS OLD
STANDARD STANDARD
IEC IEC
61869-2 ADDITIONAL REQUIREMENTS FOR 60044-1
CURRENT TRANSFORMERS
60044-6
61869-3 ADDITIONAL REQUIREMENTS FOR 60044-2
INDUCTIVE VOLTAGE TRANSFORMERS
61869-4 ADDITIONAL REQUIREMENTS FOR 60044-3
COMBINED TRANSFORMERS
61869-5 ADDITIONAL REQUIREMENTS FOR 60044-5
CAPACITOR VOLTAGE
TRANSFORMERS
61869-7 ADDITIONAL REQUIREMENTS FOR 60044-7
ELECTRONIC VOLTAGE
TRANSFORMERS
61869-8 ADDITIONAL REQUIREMENTS FOR 60044-8
ELECTRONIC CURRENT
TRANSFORMERS
61869-1
GENERAL 61869-9 DIGITAL INTERFACE FOR INSTRUMENT
REQUIREMENTS TRANSFORMERS
FOR
61869-10 ADDITIONAL REQUIREMENTS FOR
INSTRUMENT
LOW POWER PASSIVE CURRENT
61869-6
TRANSFORMERS
TRANSFORMERS
ADDITIONAL
61869-11 ADDITIONAL REQUIREMENTS FOR 60044-7
GENERAL
LOW POWER VOLTAGE
REQUIREMENTS
TRANSFORMERS
FOR LOW POWER
INSTRUMENT
61869-12 ADDITIONAL REQUIREMENTS FOR
TRANSFORMERS
COMBINED ELECTRONIC INSTRUMENT
TRANSFORMERS AND COMBINED
STAND ALONE INSTRUMENT
TRANSFORMERS
61869-13 STAND ALONE MERGING UNIT
61869-14 ADDITIONAL REQUIREMENTS FOR DC
CURRENT TRANSFORMERS
61869-15 ADDITIONAL REQUIREMENTS FOR DC
VOLTAGE TRANSFORMERS FOR DC
APPLICATIONS

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.
---------------------- Page: 12 ----------------------
SIST EN IEC 61869-9:2019
IEC 61869-9:2016  IEC 2016 – 7 –
INTRODUCTION
General

This standard is a product family standard for instrument transformers. It provides an

application of the standard series IEC 61850, which details layered substation communication

architecture in the world of instrument transformers.

By providing tutorial material such as examples and explanations, it also provides access for

instrument transformer, protective relay and meter experts to concepts and methods applied

in the IEC 61850 series.

Compared to instrument transformers, digital communication technology is subject to on-going

changes which are expected to continue in the future. Significant experience with electronics

integrated directly into instrument transformers has yet to be gathered on a broader basis, as

this type of equipment is not widely spread in the industry and a change of paradigm has not

yet occurred.
Position of this standard in relation to the IEC 61850 series

The IEC 61850 series is a standard intended to be used for communication networks and

systems for power utility automation. The most important parts of this series define:

a) information models for the substation automation system;

b) these information models include both the models of the instrument transformers and

other process equipment (like circuit-breakers and disconnectors), and the models of the

substation automation system (like protection relays and meters). The models are defined

in IEC 61850-7-3 and IEC 61850-7-4;

c) the communication between intelligent electronic devices (IEDs) of the substation

automation system. The abstract models are defined in IEC 61850-7-2 and the mappings

on communication stacks are defined in IEC 61850-8-1 and IEC 61850-9-2;

d) a configuration language used to describe the configuration aspects of the substation

automation system is described in IEC 61850-6;

e) conformance testing of the communication interfaces of the IEDs of the power utility

automation system including their data models. The conformance testing is defined in

IEC 61850-10.

Typically, in a traditional system, IEDs like bay level controllers or protection relays interface

directly through analogue signals to instrument transformers. In that case, the data models of

the instrument transformers are implemented in these bay level devices. However, this is not

the only realization. In the case where electronics are integrated directly into electronic LPIT,

the above-mentioned data models should be implemented within the instrument transformer

and the instrument transformer needs to support a communication interface. The part of an

electronic LPIT that does this is known as the merging unit.

IEC 61850, being a system oriented standard series, leaves many options open in order to

support present and future requirements of all sizes of substations at all voltage levels.

To reduce the engineering amount required to achieve interoperability for the digital interface

between instrument transformers and equipment that uses the digital signal (like protective

relays, meters or bay level controllers), this standard specifies additional constraints on

implementing a digital communication interface.
The IEC 61869-9 standard:
– replaces the IEC 60044-8 digital solution;
---------------------- Page: 13 ----------------------
SIST EN IEC 61869-9:2019
– 8 – IEC 61869-9:2016  IEC 2016

– provides a product standard for instrument transformers with a digital interface according

to the IEC 61850 series; similar to what IEC 62271-3 offers for switchgear;

– includes backward compatibility for the UCA International Users Group Implementation

Guideline for Digital Interface to Instrument Transformers Using IEC 61850-9-2;

– uses IEC 61588 based time synchronization in accordance with IEC/IEEE 61850-9-3, with

an option for 1PPS (pulse per second).
Overview of the digital interface for instrument transformers
An illustrativ
...

SLOVENSKI STANDARD
SIST EN IEC 61869-9:2019
01-oktober-2019
Nadomešča:
SIST EN 60044-8:2003

Merilni transformatorji - 9. del: Digitalni vmesnik za merilne transformatorje (IEC

61869-9:2016)

Instrument Transformers - Part 9: Digital interface for instrument transformers (IEC

61869-9:2016)
Messwandler - Teil 9: Digitale Schnittstelle für Messwandler (IEC 61869-9:2016)

Transformateurs de mesure - Partie 9: Interface numérique pour les transformateurs de

mesure (IEC 61869-9:2016)
Ta slovenski standard je istoveten z: EN IEC 61869-9:2019
ICS:
17.220.20 Merjenje električnih in Measurement of electrical
magnetnih veličin and magnetic quantities
SIST EN IEC 61869-9:2019 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 61869-9:2019
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SIST EN IEC 61869-9:2019
EUROPEAN STANDARD EN IEC 61869-9
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2019
ICS 17.220.20 Supersedes EN 60044-8:2002 (partially)
English Version
Instrument transformers - Part 9: Digital interface for instrument
transformers
(IEC 61869-9:2016)

Transformateurs de mesure - Partie 9: Interface numérique Messwandler - Teil 9: Digitale Schnittstelle für Messwandler

pour les transformateurs de mesure (IEC 61869-9:2016)
(IEC 61869-9:2016)

This European Standard was approved by CENELEC on 2016-06-01. 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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 61869-9:2019 E
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SIST EN IEC 61869-9:2019
EN IEC 61869-9:2019 (E)
European foreword

The text of document 38/502/FDIS, future edition 1 of IEC 61869-9, prepared by IEC/TC 38

"Instrument transformers" was submitted to the IEC-CENELEC parallel vote and approved by

CENELEC as EN IEC 61869-9:2019.
The following dates are fixed:

• latest date by which the document has to be implemented at national (dop) 2020-01-05

level by publication of an identical national standard or by endorsement

• latest date by which the national standards conflicting with the (dow) 2022-07-05

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 shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN 60044-8:2002 (partially).
Endorsement notice

The text of the International Standard IEC 61869-9:2016 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 60044-7:1999 NOTE Harmonized as EN 60044-7:2000 (not modified)
IEC 60044-8:2002 NOTE Harmonized as EN 60044-8:2002 (not modified)
IEC 61850 (series) NOTE Harmonized as EN 61850 (series)
IEC 61850-5:2013 NOTE Harmonized as EN 61850-5:2013 (not modified)
IEC 61850-8-1 NOTE Harmonized as EN 61850-8-1
IEC 61850-10 NOTE Harmonized as EN 61850-10
IEC 61869 (series) NOTE Harmonized as EN 61869 (series)
IEC 62271-3 NOTE Harmonized as EN 62271-3
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SIST EN IEC 61869-9:2019
EN IEC 61869-9:2019 (E)
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements 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 1 Where an International Publication has been modified by common modifications, indicated by (mod), the relevant

EN/HD applies.

NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:

www.cenelec.eu.
Clause 2 of IEC 61869-6:2016 is applicable with the following additions:
Publication Year Title EN/HD Year
IEC 61588 2009 Precision clock synchronization protocol for - -
networked measurement and control
systems
IEC 61850-6 2009 Communication networks and systems for EN 61850-6 2010
power utility automation - Part 6:
Configuration description language for
communication in electrical substations
related to IEDs
IEC 61850-7-1 2011 Communication networks and systems for EN 61850-7-1 2011
power utility automation - Part 7-1: Basic
communication structure - Principles and
models
IEC 61850-7-2 2010 Communication networks and systems for EN 61850-7-2 2010
power utility automation - Part 7-2: Basic
information and communication structure -
Abstract communication service interface
(ACSI)
IEC 61850-7-3 2010 Communication networks and systems for EN 61850-7-3 2011
power utility automation - Part 7-3: Basic
communication structure - Common data
classes
IEC 61850-8-1 2011 Communication networks and systems for EN 61850-8-1 2011
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
IEC 61850-9-2 2011 Communication networks and systems for EN 61850-9-2 2011
power utility automation - Part 9-2: Specific
communication service mapping (SCSM) -
Sampled values over ISO/IEC 8802-3
IEC 61850-10 2012 Communication networks and systems for EN 61850-10 2013
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SIST EN IEC 61869-9:2019
EN IEC 61869-9:2019 (E)
Publication Year Title EN/HD Year
power utility automation - Part 10:
Conformance testing
IEC 61869-6 2016 Instrument transformers - Part 6: Additional EN 61869-6 2016
general requirements for low-power
instrument transformers
IEC/IEEE 61850-9-3 2016 Communication networks and systems for - -
power utility automation - Part 9-3:
Precision time protocol profile for power
utility automation
UCA (International - Implementation guideline for digital
Users Group interface to instrument transformers using
IEC 61850-9-2
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SIST EN IEC 61869-9:2019
IEC 61869-9
Edition 1.0 2016-04
INTERNATIONAL
STANDARD
colour
inside
Instrument transformers –
Part 9: Digital interface for instrument transformers
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 17.220.20 ISBN 978-2-8322-3331-3

Warning! Make sure that you obtained this publication from an authorized distributor.

® Registered trademark of the International Electrotechnical Commission
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SIST EN IEC 61869-9:2019
– 2 – IEC 61869-9:2016  IEC 2016
CONTENTS

FOREWORD ......................................................................................................................... 4

INTRODUCTION ................................................................................................................... 7

1 Scope .......................................................................................................................... 12

2 Normative references ................................................................................................... 12

3 Terms and definitions ................................................................................................... 13

3.5 Terms and definitions related to other ratings ...................................................... 13

3.7 Index of abbreviations ....................................................................................... 13

4 Normal and special service conditions ........................................................................... 14

5 Ratings ........................................................................................................................ 14

5.6 Rated accuracy class ........................................................................................ 14

5.901 Performance requirements ................................................................................ 15

6 Design and construction ............................................................................................... 16

6.901 Technological boundaries .................................................................................. 16

6.901.1 Interface point ..................................................................................... 16

6.901.2 Digital output interface ......................................................................... 16

6.901.3 Human-machine interface .................................................................... 16

6.902 Electrical requirements ...................................................................................... 17

6.902.1 Frequency response requirements ....................................................... 17

6.902.2 Maximum processing delay time requirement ....................................... 17

6.903 Specification of the communications profile ....................................................... 19

6.903.1 General ............................................................................................... 19

6.903.2 Variants .............................................................................................. 19

6.903.3 Digital output sample rates .................................................................. 20

6.903.4 Logical devices .................................................................................... 21

6.903.5 Logical nodes LPHD ............................................................................ 21

6.903.6 Logical nodes LLN0 ............................................................................. 21

6.903.7 Logical nodes TCTR ............................................................................ 21

6.903.8 Logical nodes TVTR ............................................................................ 24

6.903.9 Quality ................................................................................................ 25

6.903.10 Dataset(s) ........................................................................................... 26

6.903.11 Multicast sampled value control block(s) .............................................. 27

6.903.12 Configuration of the merging unit ......................................................... 27

6.903.13 Rated conformance classes ................................................................. 28

6.904 Synchronization ................................................................................................ 34

6.904.1 General ............................................................................................... 34

6.904.2 Precision time protocol synchronization ................................................ 34

6.904.3 1PPS synchronization .......................................................................... 35

6.904.4 Sample value message SmpSynch attribute ......................................... 35

6.904.5 Holdover mode .................................................................................... 36

6.904.6 Free-running mode .............................................................................. 37

6.904.7 Time adjustments ................................................................................ 37

7 Tests ............................................................................................................................ 38

7.2 Type tests ......................................................................................................... 38

7.2.6 Test for accuracy ................................................................................. 38

7.2.901 Digital output conformance tests .......................................................... 38

7.2.902 Maximum processing delay time test .................................................... 38

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7.2.903 Loss of synchronization tests ............................................................... 39

7.2.904 1PPS test ............................................................................................ 39

Annex 9A (informative) Dynamic range considerations ........................................................ 40

Annex 9B (informative) Time synchronization and management example ............................ 43

Annex 9C (informative) Example merging unit ICD file ........................................................ 45

Annex 9D (informative) Test circuits for accuracy measurement .......................................... 56

Annex 9E (informative) Electronic nameplate ...................................................................... 59

Bibliography ....................................................................................................................... 60

Figure 901 – General block diagram of an electronic LPIT with digital output ......................... 8

Figure 902 – General illustration of the objects within a merging unit (example) ..................... 9

Figure 903 – Electronic LPIT with digital output (concept example) ...................................... 10

Figure 904 – Standalone merging unit ................................................................................. 11

Figure 905 – Duplex LC connector ...................................................................................... 16

Figure 906 – Maximum processing delay time ..................................................................... 17

Figure 907 – Output message timestamp point .................................................................... 19

Figure 908 – TCTR naming example ................................................................................... 23

Figure 909 – 1PPS signal waveform at the merging unit clock input ..................................... 35

Figure 910 – Time adjustment example (6 ASDU example) .................................................. 37

Figure 9A.1 – Nomogram for current ................................................................................... 41

Figure 9A.2 – Nomogram for voltage ................................................................................... 42

Figure 9B.1 – Sampled value signal processing example showing 2ASDUs per

message (F4800S2I4U4 example) ....................................................................................... 43

Figure 9D.1 – Example test circuit ....................................................................................... 56

Figure 9D.2 – Example test circuit ....................................................................................... 58

Table 901 – Maximum processing delay time limits .............................................................. 18

Table 902 – Standard sample rates ..................................................................................... 20

Table 903 – Extensions to the LPHD class .......................................................................... 21

Table 904 – AmpSv object attribute values .......................................................................... 23

Table 905 – Extensions to the TCTR class .......................................................................... 24

Table 906 – VolSv object attribute values ............................................................................ 25

Table 907 – Extensions to the TVTR class .......................................................................... 25

Table 908 – Configuration parameters of the merging unit ................................................... 28

Table 909 – Basic conformance statement .......................................................................... 29

Table 910 – ACSI models conformance statement ............................................................... 29

Table 911 – ACSI service conformance statement ............................................................... 31

Table 912 – PICS for A-Profile support ................................................................................ 33

Table 913 – PICS for T-Profile support ................................................................................ 34

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SIST EN IEC 61869-9:2019
– 4 – IEC 61869-9:2016  IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INSTRUMENT TRANSFORMERS –
Part 9: Digital interface for instrument transformers
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 61869-9 has been prepared by IEC technical committee 38:

Instrument transformers.

This first edition replaces the corresponding specific requirements previously contained in

IEC 60044-8, published in 2002.
The text of this standard is based on the following documents:
FDIS Report on voting
38/502/FDIS 38/508/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 publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

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SIST EN IEC 61869-9:2019
IEC 61869-9:2016  IEC 2016 – 5 –

A list of all parts in the IEC 61869 series, published under the general title Instrument

transformers, can be found on the IEC website.

This publication contains an attached file in the form of a .xml file. This file is intended to be

used as a complement and does not form an integral part of the publication.

This International Standard contains specific requirements for electronic low power instrument

transformers (LPIT) having a digital output.

This Part 9 is to be read in conjunction with, and is based on, IEC 61869-1:2007, General

Requirements and IEC 61869-6:2016. However, the reader is encouraged to use its most

recent edition.

This Part 9 follows the structure of IEC 61869-6 and IEC 61869-1 and supplements or

modifies their corresponding clauses/subclauses.

When a particular clause/subclause of Part 6 is not mentioned in this Part 9, that

clause/subclause applies. When this standard states “addition”, “modification” or

“replacement”, the relevant text in Part 6 is to be adapted accordingly.
When a particular clause/subclause of Part 1 is not mentioned in Part 6, that

clause/subclause applies. When part 6 states “addition”, “modification” or “replacement”, the

relevant text in Part 1 is to be adapted accordingly.

For additional clauses, subclauses, figures, tables, annexes or note, the following numbering

system is used:

– clauses, subclauses, tables, figures and notes that are numbered starting from 901 are

additional to those in Part 1;
– additional annexes are lettered 9A, 9B, etc.

An overview of the planned set of standards at the date of publication of this document is

given below. The updated list of standards issued by IEC TC38 is available at the website:

www.iec.ch
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SIST EN IEC 61869-9:2019
– 6 – IEC 61869-9:2016  IEC 2016
PRODUCT FAMILY STANDARDS PRODUCT PRODUCTS OLD
STANDARD STANDARD
IEC IEC
61869-2 ADDITIONAL REQUIREMENTS FOR 60044-1
CURRENT TRANSFORMERS
60044-6
61869-3 ADDITIONAL REQUIREMENTS FOR 60044-2
INDUCTIVE VOLTAGE TRANSFORMERS
61869-4 ADDITIONAL REQUIREMENTS FOR 60044-3
COMBINED TRANSFORMERS
61869-5 ADDITIONAL REQUIREMENTS FOR 60044-5
CAPACITOR VOLTAGE
TRANSFORMERS
61869-7 ADDITIONAL REQUIREMENTS FOR 60044-7
ELECTRONIC VOLTAGE
TRANSFORMERS
61869-8 ADDITIONAL REQUIREMENTS FOR 60044-8
ELECTRONIC CURRENT
TRANSFORMERS
61869-1
GENERAL 61869-9 DIGITAL INTERFACE FOR INSTRUMENT
REQUIREMENTS TRANSFORMERS
FOR
61869-10 ADDITIONAL REQUIREMENTS FOR
INSTRUMENT
LOW POWER PASSIVE CURRENT
61869-6
TRANSFORMERS
TRANSFORMERS
ADDITIONAL
61869-11 ADDITIONAL REQUIREMENTS FOR 60044-7
GENERAL
LOW POWER VOLTAGE
REQUIREMENTS
TRANSFORMERS
FOR LOW POWER
INSTRUMENT
61869-12 ADDITIONAL REQUIREMENTS FOR
TRANSFORMERS
COMBINED ELECTRONIC INSTRUMENT
TRANSFORMERS AND COMBINED
STAND ALONE INSTRUMENT
TRANSFORMERS
61869-13 STAND ALONE MERGING UNIT
61869-14 ADDITIONAL REQUIREMENTS FOR DC
CURRENT TRANSFORMERS
61869-15 ADDITIONAL REQUIREMENTS FOR DC
VOLTAGE TRANSFORMERS FOR DC
APPLICATIONS

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.
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SIST EN IEC 61869-9:2019
IEC 61869-9:2016  IEC 2016 – 7 –
INTRODUCTION
General

This standard is a product family standard for instrument transformers. It provides an

application of the standard series IEC 61850, which details layered substation communication

architecture in the world of instrument transformers.

By providing tutorial material such as examples and explanations, it also provides access for

instrument transformer, protective relay and meter experts to concepts and methods applied

in the IEC 61850 series.

Compared to instrument transformers, digital communication technology is subject to on-going

changes which are expected to continue in the future. Significant experience with electronics

integrated directly into instrument transformers has yet to be gathered on a broader basis, as

this type of equipment is not widely spread in the industry and a change of paradigm has not

yet occurred.
Position of this standard in relation to the IEC 61850 series

The IEC 61850 series is a standard intended to be used for communication networks and

systems for power utility automation. The most important parts of this series define:

a) information models for the substation automation system;

b) these information models include both the models of the instrument transformers and

other process equipment (like circuit-breakers and disconnectors), and the models of the

substation automation system (like protection relays and meters). The models are defined

in IEC 61850-7-3 and IEC 61850-7-4;

c) the communication between intelligent electronic devices (IEDs) of the substation

automation system. The abstract models are defined in IEC 61850-7-2 and the mappings

on communication stacks are defined in IEC 61850-8-1 and IEC 61850-9-2;

d) a configuration language used to describe the configuration aspects of the substation

automation system is described in IEC 61850-6;

e) conformance testing of the communication interfaces of the IEDs of the power utility

automation system including their data models. The conformance testing is defined in

IEC 61850-10.

Typically, in a traditional system, IEDs like bay level controllers or protection relays interface

directly through analogue signals to instrument transformers. In that case, the data models of

the instrument transformers are implemented in these bay level devices. However, this is not

the only realization. In the case where electronics are integrated directly into electronic LPIT,

the above-mentioned data models should be implemented within the instrument transformer

and the instrument transformer needs to support a communication interface. The part of an

electronic LPIT that does this is known as the merging unit.

IEC 61850, being a system oriented standard series, leaves many options open in order to

support present and future requirements of all sizes of substations at all voltage levels.

To reduce the engineering amount required to achieve interoperability for the digital interface

between instrument transformers and equipment that uses the digital signal (like protective

relays, meters or bay level controllers), this standard specifies additional constraints on

implementing a digital communication interface.
The IEC 61869-9 standard:
– replaces the IEC 60044-8 digital solution;
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SIST EN IEC 61869-9:2019
– 8 – IEC 61869-9:2016  IEC 2016

– provides a product standard for instrument transformers with a digital interface according

to the IEC 61850 series; similar to what IEC 62271-3 offers for switchgear;

– includes backward compatibility for the UCA International Users Group Implementation

Guideline for Digital Interface to Instrument Transformers Using IEC 61850-9-2;

– uses IEC 61588 based time synchronization in accordance with IEC/IEEE 61850-9-3, with

an option for 1PPS (pulse per second).
Overview of the digital interface for instrument transformers
...

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