Instrument transformers - Part 11: Additional requirements for low-power passive voltage transformers

IEC 61869-11:2017 is a product standard and covers only additional requirements for low-power passive voltage transformers (passive LPVT). The product standard for low-power passive voltage transformers is composed of IEC 61869-1, along with IEC 61869-6 and this document with specific requirements. This document is applicable to newly manufactured low-power passive voltage transformers with analogue output having rated frequencies from 15 Hz to 100 Hz for use with electrical measuring instruments or electrical protective devices. This document covers low-power passive voltage transformers used for measurement or protection and low-power passive voltage transformers used for both measurement and protection. Low-power passive voltage transformers have analogue output only (for digital output or for technology using any kind of active electronic components refer to future IEC 61869-7). Such low-power passive voltage transformers can include the secondary signal cable (transmitting cable). The secondary voltage of the low-power passive voltage transformer is proportional to the primary voltage. Derivative output signals are not within the scope of this document. This first edition of IEC 61869-11, together with IEC 61869-1 and IEC 61869-6, cancels and replaces the relevant clauses or subclauses of the first edition of IEC 60044-7, published in 1999 and the first edition of IEC 60044-8, published in 2002. This edition constitutes a technical revision.

Messwandler - Teil 11: Zusätzliche Anforderungen an passive Kleinsignal-Spannungswandler

Transformateurs de mesure - Partie 11: Exigences supplémentaires pour les transformateurs de tension passifs de faible puissance

L'IEC 61869-11:2017 est une norme de produit qui traite uniquement des exigences supplémentaires concernant les transformateurs de tension passifs de faible puissance (LPVT passif). La norme de produit relative aux transformateurs de tension passifs de faible puissance comprend l'IEC 61869-1, ainsi que l'IEC 61869-6 et le présent document portant sur les exigences spécifiques. Le présent document s'applique aux transformateurs de tension passifs de faible puissance à sortie analogique et destinés à être utilisés avec des appareils de mesure électriques ou des dispositifs électriques de protection présentant une fréquence assignée comprise entre 15 Hz et 100 Hz. Le présent document traite des transformateurs de tension passifs de faible puissance utilisés pour la mesure ou la protection, ainsi que des transformateurs de tension passifs de faible puissance utilisés à la fois pour la mesure et la protection. Les transformateurs de tension passifs de faible puissance ont une sortie exclusivement analogique (se reporter à la future IEC 61869-7 pour une sortie numérique ou pour une technologie basée sur des composants électroniques actifs). Ces transformateurs de tension passifs de faible puissance peuvent comporter le câble de transmission du signal secondaire. La tension secondaire du transformateur de tension passif de faible puissance est proportionnelle à la tension primaire. Les signaux de sortie dérivés n'entrent pas dans le domaine d'application de la présente partie de l'IEC 61869. Cette première édition de l'IEC 61869-11, avec l'IEC 61869-1 et l'IEC 61869-6, annule et remplace les articles et paragraphes correspondants de la première édition de l'IEC 60044-7 publiée en 1999 et de la première édition de l'IEC 60044-8 publiée en 2002. Cette édition constitue une révision technique.

Instrumentni transformatorji - 11. del: Dodatne zahteve za pasivne napetostne transformatorje nizke moči (IEC 61869-11:2017)

Ta del standarda IEC 61869 je standard za proizvod in zajema le dodatne zahteve za pasivne napetostne transformatorje nizke moči. Ta standard za proizvod za pasivne napetostne transformatorje nizke moči je sestavljen iz standarda IEC 61869-1, standarda IEC 61869-6 in tega dokumenta s specifičnimi zahtevami.
Ta dokument se uporablja za novo izdelane pasivne napetostne transformatorje nizke moči z analognim izhodom in nazivno frekvenco od 15 Hz do 100 Hz za uporabo z električnimi merilnimi instrumenti ali električnimi zaščitnimi napravami.
Ta dokument zajema pasivne napetostne transformatorje nizke moči, ki se uporabljajo za merjenje ali zaščito, in pasivne napetostne transformatorje nizke moči, ki se uporabljajo za merjenje in za zaščito.
Pasivni napetostni transformatorji nizke moči imajo samo analogni izhod (za digitalni izhod ali za tehnologijo, ki uporablja katerokoli vrsto aktivnih elektronskih komponent, glej standard IEC 61869-72). Takšni pasivni napetostni transformatorji nizke moči lahko vključujejo sekundarni kabel za signal (kabel za prenos). Sekundarna napetost pasivnih napetostnih transformatorjev nizke moči je sorazmerna s primarno napetostjo. Ta dokument ne zajema odvedenih izhodnih signalov.

General Information

Status
Published
Publication Date
15-Mar-2018
Drafting Committee
Current Stage
6060 - Document made available
Due Date
18-Apr-2019

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SLOVENSKI STANDARD
SIST EN IEC 61869-11:2018
01-junij-2018
Instrumentni transformatorji - 11. del: Dodatne zahteve za pasivne napetostne
transformatorje nizke moči (IEC 61869-11:2017)

Instrument transformers - Part 11: Additional requirements for low-power passive voltage

transformers (IEC 61869-11:2017)
Transformateurs de mesure - Partie 11: Exigences supplémentaires pour les
transformateurs de tension passifs de faible puissance (IEC 61869-11:2017)
Ta slovenski standard je istoveten z: EN IEC 61869-11:2018
ICS:
17.220.20 Merjenje električnih in Measurement of electrical
magnetnih veličin and magnetic quantities
SIST EN IEC 61869-11:2018 en

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

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SIST EN IEC 61869-11:2018
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SIST EN IEC 61869-11:2018
EUROPEAN STANDARD EN IEC 61869-11
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2018
ICS 17.220.20
English Version
Instrument transformers - Part 11: Additional requirements for
low-power passive voltage transformers
(IEC 61869-11:2017)

Transformateurs de mesure - Partie 11: Exigences Messwandler - Teil 11: Zusätzliche Anforderungen an

supplémentaires pour les transformateurs de tension passive Kleinsignal-Spannungswandler

passifs de faible puissance (IEC 61869-11:2017)
(IEC 61869-11:2017)

This European Standard was approved by CENELEC on 2018-01-17. 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, 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

© 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 61869-11:2018 E
---------------------- Page: 3 ----------------------
SIST EN IEC 61869-11:2018
EN IEC 61869-11:2018 (E)
European foreword

The text of document 38/549/FDIS, future edition 1 of IEC 61869-11, prepared by IEC/TC 38

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

CENELEC as EN IEC 61869-11:2018.
The following dates are fixed:
(dop) 2018-10-17
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2021-01-17
standards conflicting with the
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.

Endorsement notice

The text of the International Standard IEC 61869-11:2017 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 60038 NOTE Harmonized as EN 60038.
IEC 60358-1 NOTE Harmonized as EN 60358-1.
1 2
IEC 60358-4 NOTE Harmonized as EN 60358-4 .
IEC 61869-3 NOTE Harmonized as EN 61869-3.
IEC 61869-5 NOTE Harmonized as EN 61869-5.
To be published. Stage at the time of publication: IEC ADIS-4:2017.
To be published. Stage at the time of publication: prEN 60358-3.
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SIST EN IEC 61869-11:2018
EN IEC 61869-11:2018 (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.
Publication Year Title EN/HD Year
IEC 61869-6 2016 Instruments transformers -- Part 6: EN 61869-6 2016
Additional general requirements for Low
Power Instrument Transformers
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SIST EN IEC 61869-11:2018
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SIST EN IEC 61869-11:2018
IEC 61869-11
Edition 1.0 2017-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Instrument transformers –
Part 11: Additional requirements for low-power passive voltage transformers
Transformateurs de mesure –
Partie 11: Exigences supplémentaires pour les transformateurs de tension
passifs de faible puissance
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.220.20 ISBN 978-2-8322-5130-0

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

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 7 ----------------------
SIST EN IEC 61869-11:2018
– 2 – IEC 61869-11:2017 © IEC 2017
CONTENTS

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

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

1 Scope .............................................................................................................................. 8

2 Normative references ...................................................................................................... 8

3 Terms and definitions ...................................................................................................... 8

3.1 General definitions .................................................................................................. 8

3.2 Definitions related to dielectric ratings and voltages .............................................. 10

3.4 Definitions related to accuracy .............................................................................. 10

3.7 Index of abbreviations and symbols ...................................................................... 11

5 Ratings .......................................................................................................................... 12

5.3 Rated insulation levels and voltages ..................................................................... 12

5.5 Rated output ......................................................................................................... 12

5.6 Rated accuracy class ............................................................................................ 12

5.1101 Standard values of rated voltages ......................................................................... 15

5.1102 Standard values of rated voltage factor F ........................................................... 15

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

6.11 Electromagnetic compatibility (EMC) ..................................................................... 16

6.13 Markings ............................................................................................................... 16

6.601 Requirements for optical transmitting system and optical output link ..................... 17

6.602 Requirements for electrical transmitting system and electrical wires for

output link ............................................................................................................. 17

6.603 Signal-to-noise ratio .............................................................................................. 17

6.604 Failure detection and maintenance announcement ................................................ 18

6.605 Operability ............................................................................................................ 18

6.606 Reliability and dependability ................................................................................. 18

6.1101 Transient response requirements .......................................................................... 18

6.1102 Voltage limitation device requirements .................................................................. 18

7 Tests ............................................................................................................................. 18

7.1 General ................................................................................................................. 18

7.2 Type tests ............................................................................................................. 20

7.3 Routine tests......................................................................................................... 23

7.4 Special tests ......................................................................................................... 24

601 Information to be given with enquiries, tenders and orders ............................................ 26

601.1 Designation ........................................................................................................... 26

601.2 Dependability ........................................................................................................ 27

Annex 11A (normative) Tests for impact of electric field from other phases .......................... 28

11A.1 General ................................................................................................................. 28

11A.2 Test setup ............................................................................................................. 28

11A.3 Test procedure ...................................................................................................... 29

Annex 11B (informative) Designation of accuracy class when using corrected

transformation ratio and ratio correction factor ...................................................................... 30

11B.1 General ................................................................................................................. 30

11B.2 Designation of accuracy class based on rated transformation ratio ....................... 31

11B.3 Designation of accuracy class based on individual ratio correction factor .............. 31

Annex 11C (informative) Types of divider principles covered by this part of IEC 61869 ........ 32

Bibliography .......................................................................................................................... 33

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SIST EN IEC 61869-11:2018
IEC 61869-11:2017 © IEC 2017 – 3 –
Figure 1101 – General block diagram of a single-phase low-power passive voltage

transforme .............................................................................................................................. 7

Figure 1102 – Terminal markings for passive LPVT .............................................................. 16

Figure 1103 – RC-divider with external low-voltage part outside the main housing ................ 22

Figure 1104 – Connection for voltage withstand test of the external low-voltage part of

a divider ................................................................................................................................ 23

Figure 1105 – Step response time of a passive LPVT ........................................................... 26

Figure 11A.1 – Test setup for LPVT used in air- insulated substations .................................. 28

Figure 11B.1 – Accuracy class designation improved, based on individual ratio

correction factor CF ............................................................................................................ 31

Figure 11C.1 – Divider principles .......................................................................................... 32

Table 1101 – Limits of ratio error and phase error for measuring LPVT ................................. 13

Table 1102 – Limits of ratio error and phase error for protection and multipurpose

LPVT .................................................................................................................................... 14

Table 1103 – Standard values of rated voltage factors .......................................................... 15

Table 1104 – Pin assignment for RJ45 connectors used in passive LPVT ............................. 17

Table 10 – List of tests.......................................................................................................... 19

Table 1105 – Burden values for basic accuracy tests ............................................................ 21

Table 1106 – Designation of a passive LPVT ........................................................................ 27

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SIST EN IEC 61869-11:2018
– 4 – IEC 61869-11:2017 © IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INSTRUMENT TRANSFORMERS –
Part 11: Additional requirements for low-power
passive voltage 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 61869-11 has been prepared by IEC technical committee 38:

Instrument transformers.

This first edition of IEC 61869-11, together with IEC 61869-1 and IEC 61869-6, cancels and

replaces the relevant clauses or subclauses of the first edition of IEC 60044-7, published in

1999 and the first edition of IEC 60044-8, published in 2002 . This edition constitutes a

technical revision.
____________

IEC 60044-7 and IEC 60044-8 will eventually be replaced by the IEC 61869 series, but until all the relevant

parts of the IEC 61869 series will be published, these two standards are still in force.

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SIST EN IEC 61869-11:2018
IEC 61869-11:2017 © IEC 2017 – 5 –
The text of this International Standard is based on the following documents:
FDIS Report on voting
38/549/FDIS 38/552/RVD

Full information on the voting for the approval of this International Standard can be found in

the report on voting indicated in the above table.

This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

This standard is Part 11 of IEC 61869, published under the general title Instrument

transformers.

This Part 11 is to be read in conjunction with, and is based on, IEC 61869-1:2007, General

requirements and IEC 61869-6:2016, Additional general requirements for low-power

instrument transformers – however, the reader is encouraged to use the most recent edition of

these documents.
This Part 11 follows the structure of IEC 61869-1:2007 and IEC 61869-6:2016 and
supplements or modifies the corresponding clauses.

When a particular subclause of Part 1 or Part 6 is not mentioned in this part Part 11, that

subclause applies. When this standard states “addition”, “modification” or “replacement”, the

relevant text in Part 1 or Part 6 is to be adapted accordingly.

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

system is used:

– clauses, subclauses, tables, figures and notes that are numbered starting from 1101 are

additional to those in Part 1 and Part 6;
– additional annexes are lettered 11A, 11B, 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 TC 38 is available at the website:

www.iec.ch.
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SIST EN IEC 61869-11:2018
– 6 – IEC 61869-11:2017 © IEC 2017
PRODUCT FAMILY STANDARDS PRODUCT PRODUCTS OLD
STANDARD STANDARD
IEC 61869-2 ADDITIONAL REQUIREMENTS FOR IEC 60044-1
CURRENT TRANSFORMERS
IEC 60044-6
IEC 61869-3 ADDITIONAL REQUIREMENTS FOR IEC 60044-2
INDUCTIVE VOLTAGE
TRANSFORMERS
IEC 61869-4 ADDITIONAL REQUIREMENTS FOR IEC 60044-3
COMBINED TRANSFORMERS
IEC 61869-5 ADDITIONAL REQUIREMENTS FOR IEC 60044-5
IEC 61869-1
CAPACITIVE VOLTAGE
GENERAL
TRANSFORMERS
REQUIREMENTS
IEC 61869-6 IEC 61869-7 ADDITIONAL REQUIREMENTS FOR IEC 60044-7
ELECTRONIC VOLTAGE
ADDITIONAL
TRANSFORMERS
GENERAL
REQUIREMENTS IEC 61869-8 SPECIFIC REQUIREMENTS FOR IEC 60044-8
FOR LOW-POWER
ELECTRONIC CURRENT
INSTRUMENT
TRANSFORMERS
TRANSFORMERS
IEC 61869-9 DIGITAL INTERFACE FOR
INSTRUMENT TRANSFORMERS
IEC 61869-10 ADDITIONAL REQUIREMENTS FOR
LOW-POWER PASSIVE CURRENT
TRANSFORMERS
IEC 61869-11 ADDITIONAL REQUIREMENTS FOR IEC 60044-7
LOW-POWER PASSIVE VOLTAGE
TRANSFORMERS
IEC 61869-12 ADDITIONAL REQUIREMENTS FOR
COMBINED ELECTRONIC
INSTRUMENT TRANSFORMER OR
COMBINED LOW-POWER PASSIVE
INSTRUMENT TRANSFORMERS
IEC 61869-13 STAND-ALONE MERGING UNIT
IEC 61869-14 ADDITIONAL REQUIREMENTS FOR
CURRENT TRANSFORMERS FOR DC
APPLICATIONS
IEC 61869-15 ADDITIONAL REQUIREMENTS FOR
VOLTAGE TRANSFORMERS FOR DC
APPLICATIONS

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to

the specific document. At this date, the document 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.
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SIST EN IEC 61869-11:2018
IEC 61869-11:2017 © IEC 2017 – 7 –
INTRODUCTION

Low-power passive voltage transformers are based on the voltage divider principle. They can

be built for example as resistive dividers, capacitive dividers or resistive-capacitive dividers.

Annex 11C shows the schematic diagram of the different dividers.

According to a general block diagram given in Figure 601 of IEC 61869-6:2016, the low-power

passive voltage transformers do not use an active primary converter (i.e. without any active

electronic component); therefore, there is no need for primary power supply. Additionally,

neither the secondary converter nor the secondary power supply is used.
The general block diagram of a low-power passive voltage transformer is given in
Figure 1101.

The applied technology decides which part is necessary for the realization of a low-power

passive voltage transformer, i.e. it is not necessary that the transmitting cable or primary

converter described in Figure 1101 be included in the low-power passive voltage transformer.

Passive a
Primary
Transmitting
primary
voltage sensor
cable
N converter n
IEC
Figure 1101 – General block diagram of a single-phase low-power
passive voltage transformer
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SIST EN IEC 61869-11:2018
– 8 – IEC 61869-11:2017 © IEC 2017
INSTRUMENT TRANSFORMERS –
Part 11: Additional requirements for low-power
passive voltage transformers
1 Scope

This part of IEC 61869 is a product standard and covers only additional requirements for low-

power passive voltage transformers (passive LPVT). The product standard for low-power

passive voltage transformers is composed of IEC 61869-1, along with IEC 61869-6 and this

document with specific requirements.

This document is applicable to newly manufactured low-power passive voltage transformers

with analogue output having rated frequencies from 15 Hz to 100 Hz for use with electrical

measuring instruments or electrical protective devices.

This document covers low-power passive voltage transformers used for measurement or

protection and low-power passive voltage transformers used for both measurement and

protection.

Low-power passive voltage transformers have analogue output only (for digital output or for

technology using any kind of active electronic components refer to future IEC 61869-7 ). Such

low-power passive voltage transformers can include the secondary signal cable (transmitting

cable). The secondary voltage of the low-power passive voltage transformer is proportional to

the primary voltage. Derivative output signals are not within the scope of this document.

2 Normative references

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.
Clause 2 of IEC 61869-6:2016 is applicable with the following additions:

IEC 61869-6:2016, Instrument transformers – Part 6: Additional general requirements for low-

power instrument transformers
3 Terms and definitions

For the purposes of this document, the terms and definitions given in IEC 61869-1 and

IEC 61869-6 apply with the following additions and modifications:
3.1 General definitions
3.1.613
transmitting system

Definition 3.1.613 of IEC 61869-6:2016 is applicable with the following addition:

____________
Under preparation.
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SIST EN IEC 61869-11:2018
IEC 61869-11:2017 © IEC 2017 – 9 –

Note 1101 to entry: For low-power passive voltage transformers the transmitting system is just a transmitting

cable.
3.1.621
output signal

Definition 3.1.621 of IEC 61869-6:2016 is applicable with the following modification:

Note 1 to entry: In an electrically steady-state condition, the output signal is defined by the following equation:

u (t) = U 2 sin(2πft + ϕ ) + u (t)
s s s sres
where
u (t) is the output signal in steady state condition;
U is the RMS value of secondary voltage, when u (t) = 0;
s s res
f is the fundamental frequency;
ϕ is the secondary phase;

u (t) is the secondary residual voltage including harmonic, sub-harmonic and interharmonic components;

s res
t is the instantaneous value of the time;
f, U , ϕ are constant for steady-state condition.
s s
3.1.1101
voltage divider

device comprising resistors, inductors, capacitors (or a combination of these components)

such that, between two points of the device, a desired fraction of the voltage applied to the

device as whole can be obtained
[SOURCE: IEC 60050-312:2001, 312-02-32, modified – transformer deleted]
3.1.1102
high-voltage resistor

resistor connected between the high-voltage terminal and the intermediate-voltage secondary

terminal of a voltage divider
3.1.1103
high- voltage capacitor

capacitor connected between the high-voltage terminal and the intermediate-voltage

secondary terminal of a voltage divider
[SOURCE: IEC 60050-436:1990, 436-02-12]
3.1.1104
low- voltage resistor
resistive part of an R- or RC-divider between the secondary terminals
3.1.1105
low-voltage capacitor
capacitive part of a C- or RC-divider between the secondary terminals
3.1.1106
voltage limitation device
device connected in parallel to the secondary terminals to limit overvoltage
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SIST EN IEC 61869-11:2018
– 10 – IEC 61869-11:2017 © IEC 2017
3.2 Definitions related to dielectric ratings and voltages
3.2.1101
rated voltage factor

multiplying factor to be applied to the rated primary voltage to determine the maximum voltage

at which a transformer must comply with the relevant thermal requirements for a specified

time and with the relevant accuracy requirements
[SOURCE: IEC 60050-321:1986, 321-03-12]
3.4 Definitions related to accuracy
3.4.3
ratio error
Definition 3.4.3 of IEC 61869-1:2007 is applicable with the following addition:

Note 1101 to entry: The ratio error, expressed in percent, is given by the following formula:

K ⋅U − U
r s p
ε = ×100 %
where
K is the rated transformation ratio;
U is the RMS value of the primary voltage;
U is the RMS value of the secondary voltage.

This definition is only related to the rated frequency component of both the primary and secondary signal.

3.4.602
rated delay time
Not applicable.
3.4.1101
ratio correction factor

factor by which the rated transformation ratio evaluated at rated burden and rated frequency

of an individual passive LPVT is to be multiplied to achieve the specified accuracy class

3.4.1102
corrected transformation ratio
cor
individual transformation ratio of a passive LPVT

Note 1 to entry: The relationship between the corrected transformation ratio and the rated ratio correction factor

is:
K = CF ⋅ K
cor U r
3.4.1103
phase offset correction
o cor

value to be added to the rated phase offset evaluated at rated burden and rated frequency of

an individual passive LPVT to achieve the specified accuracy class
---------------------- Page: 16 ----------------------
SIST EN IEC 61869-11:2018
IEC 61869-11:2017 © IEC 2017 – 11 –
...

SLOVENSKI STANDARD
SIST EN IEC 61869-11:2018
01-junij-2018
0HULOQLWUDQVIRUPDWRUMLGHO'RGDWQH]DKWHYH]DSDVLYQHQDSHWRVWQH
WUDQVIRUPDWRUMHQL]NHPRþL ,(&

Instrument transformers - Part 11: Additional requirements for low-power passive voltage

transformers (IEC 61869-11:2017)
Transformateurs de mesure - Partie 11: Exigences supplémentaires pour les
transformateurs de tension passifs de faible puissance (IEC 61869-11:2017)
Ta slovenski standard je istoveten z: EN IEC 61869-11:2018
ICS:
17.220.20 0HUMHQMHHOHNWULþQLKLQ Measurement of electrical
PDJQHWQLKYHOLþLQ and magnetic quantities
SIST EN IEC 61869-11:2018 en

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

---------------------- Page: 1 ----------------------
SIST EN IEC 61869-11:2018
---------------------- Page: 2 ----------------------
SIST EN IEC 61869-11:2018
EUROPEAN STANDARD EN IEC 61869-11
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2018
ICS 17.220.20
English Version
Instrument transformers - Part 11: Additional requirements for
low-power passive voltage transformers
(IEC 61869-11:2017)

Transformateurs de mesure - Partie 11: Exigences Messwandler - Teil 11: Zusätzliche Anforderungen an

supplémentaires pour les transformateurs de tension passive Kleinsignal-Spannungswandler

passifs de faible puissance (IEC 61869-11:2017)
(IEC 61869-11:2017)

This European Standard was approved by CENELEC on 2018-01-17. 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, 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

© 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 61869-11:2018 E
---------------------- Page: 3 ----------------------
SIST EN IEC 61869-11:2018
EN IEC 61869-11:2018 (E)
European foreword

The text of document 38/549/FDIS, future edition 1 of IEC 61869-11, prepared by IEC/TC 38

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

CENELEC as EN IEC 61869-11:2018.
The following dates are fixed:
(dop) 2018-10-17
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2021-01-17
standards conflicting with the
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.

Endorsement notice

The text of the International Standard IEC 61869-11:2017 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 60038 NOTE Harmonized as EN 60038.
IEC 60358-1 NOTE Harmonized as EN 60358-1.
1 2
IEC 60358-4 NOTE Harmonized as EN 60358-4 .
IEC 61869-3 NOTE Harmonized as EN 61869-3.
IEC 61869-5 NOTE Harmonized as EN 61869-5.
To be published. Stage at the time of publication: IEC ADIS-4:2017.
To be published. Stage at the time of publication: prEN 60358-3.
---------------------- Page: 4 ----------------------
SIST EN IEC 61869-11:2018
EN IEC 61869-11:2018 (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.
Publication Year Title EN/HD Year
IEC 61869-6 2016 Instruments transformers -- Part 6: EN 61869-6 2016
Additional general requirements for Low
Power Instrument Transformers
---------------------- Page: 5 ----------------------
SIST EN IEC 61869-11:2018
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SIST EN IEC 61869-11:2018
IEC 61869-11
Edition 1.0 2017-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Instrument transformers –
Part 11: Additional requirements for low-power passive voltage transformers
Transformateurs de mesure –
Partie 11: Exigences supplémentaires pour les transformateurs de tension
passifs de faible puissance
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.220.20 ISBN 978-2-8322-5130-0

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

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 7 ----------------------
SIST EN IEC 61869-11:2018
– 2 – IEC 61869-11:2017 © IEC 2017
CONTENTS

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

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

1 Scope .............................................................................................................................. 8

2 Normative references ...................................................................................................... 8

3 Terms and definitions ...................................................................................................... 8

3.1 General definitions .................................................................................................. 8

3.2 Definitions related to dielectric ratings and voltages .............................................. 10

3.4 Definitions related to accuracy .............................................................................. 10

3.7 Index of abbreviations and symbols ...................................................................... 11

5 Ratings .......................................................................................................................... 12

5.3 Rated insulation levels and voltages ..................................................................... 12

5.5 Rated output ......................................................................................................... 12

5.6 Rated accuracy class ............................................................................................ 12

5.1101 Standard values of rated voltages ......................................................................... 15

5.1102 Standard values of rated voltage factor F ........................................................... 15

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

6.11 Electromagnetic compatibility (EMC) ..................................................................... 16

6.13 Markings ............................................................................................................... 16

6.601 Requirements for optical transmitting system and optical output link ..................... 17

6.602 Requirements for electrical transmitting system and electrical wires for

output link ............................................................................................................. 17

6.603 Signal-to-noise ratio .............................................................................................. 17

6.604 Failure detection and maintenance announcement ................................................ 18

6.605 Operability ............................................................................................................ 18

6.606 Reliability and dependability ................................................................................. 18

6.1101 Transient response requirements .......................................................................... 18

6.1102 Voltage limitation device requirements .................................................................. 18

7 Tests ............................................................................................................................. 18

7.1 General ................................................................................................................. 18

7.2 Type tests ............................................................................................................. 20

7.3 Routine tests......................................................................................................... 23

7.4 Special tests ......................................................................................................... 24

601 Information to be given with enquiries, tenders and orders ............................................ 26

601.1 Designation ........................................................................................................... 26

601.2 Dependability ........................................................................................................ 27

Annex 11A (normative) Tests for impact of electric field from other phases .......................... 28

11A.1 General ................................................................................................................. 28

11A.2 Test setup ............................................................................................................. 28

11A.3 Test procedure ...................................................................................................... 29

Annex 11B (informative) Designation of accuracy class when using corrected

transformation ratio and ratio correction factor ...................................................................... 30

11B.1 General ................................................................................................................. 30

11B.2 Designation of accuracy class based on rated transformation ratio ....................... 31

11B.3 Designation of accuracy class based on individual ratio correction factor .............. 31

Annex 11C (informative) Types of divider principles covered by this part of IEC 61869 ........ 32

Bibliography .......................................................................................................................... 33

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SIST EN IEC 61869-11:2018
IEC 61869-11:2017 © IEC 2017 – 3 –
Figure 1101 – General block diagram of a single-phase low-power passive voltage

transforme .............................................................................................................................. 7

Figure 1102 – Terminal markings for passive LPVT .............................................................. 16

Figure 1103 – RC-divider with external low-voltage part outside the main housing ................ 22

Figure 1104 – Connection for voltage withstand test of the external low-voltage part of

a divider ................................................................................................................................ 23

Figure 1105 – Step response time of a passive LPVT ........................................................... 26

Figure 11A.1 – Test setup for LPVT used in air- insulated substations .................................. 28

Figure 11B.1 – Accuracy class designation improved, based on individual ratio

correction factor CF ............................................................................................................ 31

Figure 11C.1 – Divider principles .......................................................................................... 32

Table 1101 – Limits of ratio error and phase error for measuring LPVT ................................. 13

Table 1102 – Limits of ratio error and phase error for protection and multipurpose

LPVT .................................................................................................................................... 14

Table 1103 – Standard values of rated voltage factors .......................................................... 15

Table 1104 – Pin assignment for RJ45 connectors used in passive LPVT ............................. 17

Table 10 – List of tests.......................................................................................................... 19

Table 1105 – Burden values for basic accuracy tests ............................................................ 21

Table 1106 – Designation of a passive LPVT ........................................................................ 27

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SIST EN IEC 61869-11:2018
– 4 – IEC 61869-11:2017 © IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INSTRUMENT TRANSFORMERS –
Part 11: Additional requirements for low-power
passive voltage 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 61869-11 has been prepared by IEC technical committee 38:

Instrument transformers.

This first edition of IEC 61869-11, together with IEC 61869-1 and IEC 61869-6, cancels and

replaces the relevant clauses or subclauses of the first edition of IEC 60044-7, published in

1999 and the first edition of IEC 60044-8, published in 2002 . This edition constitutes a

technical revision.
____________

IEC 60044-7 and IEC 60044-8 will eventually be replaced by the IEC 61869 series, but until all the relevant

parts of the IEC 61869 series will be published, these two standards are still in force.

---------------------- Page: 10 ----------------------
SIST EN IEC 61869-11:2018
IEC 61869-11:2017 © IEC 2017 – 5 –
The text of this International Standard is based on the following documents:
FDIS Report on voting
38/549/FDIS 38/552/RVD

Full information on the voting for the approval of this International Standard can be found in

the report on voting indicated in the above table.

This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

This standard is Part 11 of IEC 61869, published under the general title Instrument

transformers.

This Part 11 is to be read in conjunction with, and is based on, IEC 61869-1:2007, General

requirements and IEC 61869-6:2016, Additional general requirements for low-power

instrument transformers – however, the reader is encouraged to use the most recent edition of

these documents.
This Part 11 follows the structure of IEC 61869-1:2007 and IEC 61869-6:2016 and
supplements or modifies the corresponding clauses.

When a particular subclause of Part 1 or Part 6 is not mentioned in this part Part 11, that

subclause applies. When this standard states “addition”, “modification” or “replacement”, the

relevant text in Part 1 or Part 6 is to be adapted accordingly.

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

system is used:

– clauses, subclauses, tables, figures and notes that are numbered starting from 1101 are

additional to those in Part 1 and Part 6;
– additional annexes are lettered 11A, 11B, 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 TC 38 is available at the website:

www.iec.ch.
---------------------- Page: 11 ----------------------
SIST EN IEC 61869-11:2018
– 6 – IEC 61869-11:2017 © IEC 2017
PRODUCT FAMILY STANDARDS PRODUCT PRODUCTS OLD
STANDARD STANDARD
IEC 61869-2 ADDITIONAL REQUIREMENTS FOR IEC 60044-1
CURRENT TRANSFORMERS
IEC 60044-6
IEC 61869-3 ADDITIONAL REQUIREMENTS FOR IEC 60044-2
INDUCTIVE VOLTAGE
TRANSFORMERS
IEC 61869-4 ADDITIONAL REQUIREMENTS FOR IEC 60044-3
COMBINED TRANSFORMERS
IEC 61869-5 ADDITIONAL REQUIREMENTS FOR IEC 60044-5
IEC 61869-1
CAPACITIVE VOLTAGE
GENERAL
TRANSFORMERS
REQUIREMENTS
IEC 61869-6 IEC 61869-7 ADDITIONAL REQUIREMENTS FOR IEC 60044-7
ELECTRONIC VOLTAGE
ADDITIONAL
TRANSFORMERS
GENERAL
REQUIREMENTS IEC 61869-8 SPECIFIC REQUIREMENTS FOR IEC 60044-8
FOR LOW-POWER
ELECTRONIC CURRENT
INSTRUMENT
TRANSFORMERS
TRANSFORMERS
IEC 61869-9 DIGITAL INTERFACE FOR
INSTRUMENT TRANSFORMERS
IEC 61869-10 ADDITIONAL REQUIREMENTS FOR
LOW-POWER PASSIVE CURRENT
TRANSFORMERS
IEC 61869-11 ADDITIONAL REQUIREMENTS FOR IEC 60044-7
LOW-POWER PASSIVE VOLTAGE
TRANSFORMERS
IEC 61869-12 ADDITIONAL REQUIREMENTS FOR
COMBINED ELECTRONIC
INSTRUMENT TRANSFORMER OR
COMBINED LOW-POWER PASSIVE
INSTRUMENT TRANSFORMERS
IEC 61869-13 STAND-ALONE MERGING UNIT
IEC 61869-14 ADDITIONAL REQUIREMENTS FOR
CURRENT TRANSFORMERS FOR DC
APPLICATIONS
IEC 61869-15 ADDITIONAL REQUIREMENTS FOR
VOLTAGE TRANSFORMERS FOR DC
APPLICATIONS

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to

the specific document. At this date, the document 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.
---------------------- Page: 12 ----------------------
SIST EN IEC 61869-11:2018
IEC 61869-11:2017 © IEC 2017 – 7 –
INTRODUCTION

Low-power passive voltage transformers are based on the voltage divider principle. They can

be built for example as resistive dividers, capacitive dividers or resistive-capacitive dividers.

Annex 11C shows the schematic diagram of the different dividers.

According to a general block diagram given in Figure 601 of IEC 61869-6:2016, the low-power

passive voltage transformers do not use an active primary converter (i.e. without any active

electronic component); therefore, there is no need for primary power supply. Additionally,

neither the secondary converter nor the secondary power supply is used.
The general block diagram of a low-power passive voltage transformer is given in
Figure 1101.

The applied technology decides which part is necessary for the realization of a low-power

passive voltage transformer, i.e. it is not necessary that the transmitting cable or primary

converter described in Figure 1101 be included in the low-power passive voltage transformer.

Passive a
Primary
Transmitting
primary
voltage sensor
cable
N converter n
IEC
Figure 1101 – General block diagram of a single-phase low-power
passive voltage transformer
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SIST EN IEC 61869-11:2018
– 8 – IEC 61869-11:2017 © IEC 2017
INSTRUMENT TRANSFORMERS –
Part 11: Additional requirements for low-power
passive voltage transformers
1 Scope

This part of IEC 61869 is a product standard and covers only additional requirements for low-

power passive voltage transformers (passive LPVT). The product standard for low-power

passive voltage transformers is composed of IEC 61869-1, along with IEC 61869-6 and this

document with specific requirements.

This document is applicable to newly manufactured low-power passive voltage transformers

with analogue output having rated frequencies from 15 Hz to 100 Hz for use with electrical

measuring instruments or electrical protective devices.

This document covers low-power passive voltage transformers used for measurement or

protection and low-power passive voltage transformers used for both measurement and

protection.

Low-power passive voltage transformers have analogue output only (for digital output or for

technology using any kind of active electronic components refer to future IEC 61869-7 ). Such

low-power passive voltage transformers can include the secondary signal cable (transmitting

cable). The secondary voltage of the low-power passive voltage transformer is proportional to

the primary voltage. Derivative output signals are not within the scope of this document.

2 Normative references

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.
Clause 2 of IEC 61869-6:2016 is applicable with the following additions:

IEC 61869-6:2016, Instrument transformers – Part 6: Additional general requirements for low-

power instrument transformers
3 Terms and definitions

For the purposes of this document, the terms and definitions given in IEC 61869-1 and

IEC 61869-6 apply with the following additions and modifications:
3.1 General definitions
3.1.613
transmitting system

Definition 3.1.613 of IEC 61869-6:2016 is applicable with the following addition:

____________
Under preparation.
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SIST EN IEC 61869-11:2018
IEC 61869-11:2017 © IEC 2017 – 9 –

Note 1101 to entry: For low-power passive voltage transformers the transmitting system is just a transmitting

cable.
3.1.621
output signal

Definition 3.1.621 of IEC 61869-6:2016 is applicable with the following modification:

Note 1 to entry: In an electrically steady-state condition, the output signal is defined by the following equation:

u (t) = U 2 sin(2πft + ϕ ) + u (t)
s s s sres
where
u (t) is the output signal in steady state condition;
U is the RMS value of secondary voltage, when u (t) = 0;
s s res
f is the fundamental frequency;
ϕ is the secondary phase;

u (t) is the secondary residual voltage including harmonic, sub-harmonic and interharmonic components;

s res
t is the instantaneous value of the time;
f, U , ϕ are constant for steady-state condition.
s s
3.1.1101
voltage divider

device comprising resistors, inductors, capacitors (or a combination of these components)

such that, between two points of the device, a desired fraction of the voltage applied to the

device as whole can be obtained
[SOURCE: IEC 60050-312:2001, 312-02-32, modified – transformer deleted]
3.1.1102
high-voltage resistor

resistor connected between the high-voltage terminal and the intermediate-voltage secondary

terminal of a voltage divider
3.1.1103
high- voltage capacitor

capacitor connected between the high-voltage terminal and the intermediate-voltage

secondary terminal of a voltage divider
[SOURCE: IEC 60050-436:1990, 436-02-12]
3.1.1104
low- voltage resistor
resistive part of an R- or RC-divider between the secondary terminals
3.1.1105
low-voltage capacitor
capacitive part of a C- or RC-divider between the secondary terminals
3.1.1106
voltage limitation device
device connected in parallel to the secondary terminals to limit overvoltage
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SIST EN IEC 61869-11:2018
– 10 – IEC 61869-11:2017 © IEC 2017
3.2 Definitions related to dielectric ratings and voltages
3.2.1101
rated voltage factor

multiplying factor to be applied to the rated primary voltage to determine the maximum voltage

at which a transformer must comply with the relevant thermal requirements for a specified

time and with the relevant accuracy requirements
[SOURCE: IEC 60050-321:1986, 321-03-12]
3.4 Definitions related to accuracy
3.4.3
ratio error
Definition 3.4.3 of IEC 61869-1:2007 is applicable with the following addition:

Note 1101 to entry: The ratio error, expressed in percent, is given by the following formula:

K ⋅U − U
r s p
ε = ×100 %
where
K is the rated transformation ratio;
U is the RMS value of the primary voltage;
U is the RMS value of the secondary voltage.

This definition is only related to the rated frequency component of both the primary and secondary signal.

3.4.602
rated delay time
Not applicable.
3.4.1101
ratio correction factor

factor by which the rated transformation ratio evaluated at rated burden and rated frequency

of an individual passive LPVT is to be multiplied to achieve the specified accuracy class

3.4.1102
corrected transformation ratio
cor
individual transformation ratio of a passive LPVT

Note 1 to entry: The relationship between the corrected transformation ratio and the rated ratio correction factor

is:
K = CF ⋅ K
cor U r
3.4.1103
phase offset correction
o cor

value to be added to the rated phase offset evaluated at rated burden and rated frequency of

an individual passive LPVT to achieve the specified accuracy class
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SIST EN IEC 61869-11:2018
IEC 61869-11:2
...

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