Instrument transformers - Part 4: Additional requirements for combined transformers

IEC 61869-4:2013 applies to newly-manufactured combined transformers for use with electrical measuring instruments and electrical protective devices at frequencies from 15 Hz to 100 Hz. The requirements and tests of this standard, in addition to the requirements and tests of IEC 61869-1, IEC 61869-2 and IEC 61869-3 cover current and inductive voltage transformers that are necessary for combined instrument transformers. This standard replaces IEC 60044-3: Combined transformers.

Messwandler - Teil 4: Zusätzliche Anforderungen für kombinierte Wandler

Transformateurs de mesure - Partie 4: Exigences supplémentaires concernant les transformateurs combinés

La CEI 61869-4:2013 s'applique aux transformateurs combinés de fabrication récente destinés à être utilisés avec des instruments de mesure électriques et des appareils de protection électriques, à des fréquences comprises entre 15 Hz et 100 Hz. Les exigences et les essais de cette norme, en complément des exigences et des essais de la CEI 61869-1, la CEI 61869-2 et la CEI 61869-3, couvrent les transformateurs de courant et les transformateurs inductifs de tension qui sont nécessaires pour les transformateurs combinés de mesure. La présente norme remplace la CEI 60044-3: Transformateurs combinés.

Instrumentni transformatorji - 4. del: Kombinirani transformatorji (IEC 61869-4:2013)

Ta del standarda IEC 61869 se uporablja za nove kombinirane transformatorje, ki se uporabljajo v električnih merilnih instrumentih in električnih zaščitnih napravah s frekvencami od 15 Hz do 100 Hz. Zahteve in preskusi iz tega standarda ter zahteve in preskusi iz standardov IEC 61869-1, IEC 61869-2 in IEC 61869-3 zajemajo tokovne in induktivne napetostne transformatorje, ki so potrebni za kombinirane instrumentne transformatorje.

General Information

Status
Published
Publication Date
05-Jun-2014
Drafting Committee
Current Stage
6060 - Document made available
Due Date
06-Jun-2014
Completion Date
06-Jun-2014

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SLOVENSKI STANDARD
SIST EN 61869-4:2014
01-september-2014
1DGRPHãþD
SIST EN 60044-3:2003
Instrumentni transformatorji - 4. del: Kombinirani transformatorji (IEC 61869-
4:2013)
Instrument transformers - Part 4: Combined transformers
Transformateurs de mesure - Partie 4: Transformateurs combinés
Ta slovenski standard je istoveten z: EN 61869-4:2014
ICS:
17.220.20 0HUMHQMHHOHNWULþQLKLQ Measurement of electrical
PDJQHWQLKYHOLþLQ and magnetic quantities
SIST EN 61869-4:2014 en

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

---------------------- Page: 1 ----------------------
SIST EN 61869-4:2014
---------------------- Page: 2 ----------------------
SIST EN 61869-4:2014
EUROPEAN STANDARD EN 61869-4
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2014
ICS 17.220.20 Supersedes EN 60044-3:2003
English Version
Instrument transformers - Part 4: Additional requirements for
combined transformers
(IEC 61869-4:2013)

Transformateurs de mesure - Partie 4: Exigences Messwandler - Teil 4: Zusätzliche Anforderungen an

supplémentaires concernant les transformateurs combinés kombinierte Wandler
(CEI 61869-4:2013) (IEC 61869-4:2013)

This European Standard was approved by CENELEC on 2013-12-24. 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, 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: Avenue Marnix 17, B-1000 Brussels

© 2014 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN 61869-4:2014 E
---------------------- Page: 3 ----------------------
SIST EN 61869-4:2014
EN 61869-4:2014 - 2 -
Foreword

The text of document 38/468/FDIS, future edition 1 of IEC 61869-4, prepared by IEC/TC 38

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

CENELEC as EN 61869-4:2014.
The following dates are fixed:
• latest date by which the document has (dop) 2014-12-06
to be implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2016-12-24
• latest date by which the national
standards conflicting with the
document have to be withdrawn
This document supersedes EN 60044-3:2003.

This Part 4 is to be read in conjunction with, and is based on, EN 61869-1:2009, General

requirements, EN 61869-2:2012, Additional requirements for current transform, and EN 61869-

3:2011, Additional requirements for inductive voltage transformers. However, the reader is

encouraged to use the most recent edition of these documents.

This Part 4 follows the structure of EN 61869-1, EN 61869-2 and EN 61869-3 and supplements or

modifies its corresponding clauses.

When a particular subclause of Part 1, 2 or 3 is not mentioned in this Part 4, that subclause applies as

far as is reasonable. When this standard states “addition”, “modification” or “replacement”, the

relevant text in Part 1, 2 or 3 is to be adapted accordingly.

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

is used:

– clauses, subclauses, tables and figures that are numbered starting from 401 are additional to those

in Part 1, 2 or 3;
– additional annexes are lettered 4A, 4B, etc.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such

patent rights.

This standard covers the Principle Elements of the Safety Objectives for Electrical Equipment

Designed for Use within Certain Voltage Limits (LVD - 2006/95/EC).
Endorsement notice

The text of the International Standard IEC 61869-4:2013 was approved by CENELEC as a European

Standard without any modification.
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SIST EN 61869-4:2014
- 3 - EN 61869-4:2014
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For dated references, only the edition cited applies. For undated

references, the latest edition of the referenced document (including any amendments) applies.

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

applies.
Clause 2 of EN 61869-1:2009 is applicable with the following modifications:
Publication Year Title EN/HD Year
Addition:
IEC 60028 - International standard of resistance for - -
copper
IEC 60038 - IEC standard voltages EN 60038 -
IEC 61869-1 (mod) 2007 Instrument transformers - EN 61869-1 2009
Part 1: General requirements
IEC 61869-2 2012 Instrument transformers - EN 61869-2 2012
Part 2: Additional requirements for current
transformers
IEC 61869-3 2011 Instrument transformers - EN 61869-3 2011
Part 3: Additional requirements for inductive
voltage transformers
---------------------- Page: 5 ----------------------
SIST EN 61869-4:2014
---------------------- Page: 6 ----------------------
SIST EN 61869-4:2014
IEC 61869-4
Edition 1.0 2013-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Instrument transformers –
Part 4: Additional requirements for combined transformers
Transformateurs de mesure –
Partie 4: Exigences supplémentaires concernant les transformateurs combinés
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX S
ICS 17.220.20 ISBN 978-2-8322-1215-8

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 61869-4:2014
– 2 – 61869-4 © IEC:2013
CONTENTS

FOREWORD ........................................................................................................................... 3

1 Scope .............................................................................................................................. 7

2 Normative references ...................................................................................................... 7

3 Terms, definitions and abbreviations ............................................................................... 7

4 Normal and special service conditions ........................................................................... 10

5 Ratings .......................................................................................................................... 10

6 Design and construction ................................................................................................ 10

7 Tests ............................................................................................................................. 11

8 Rules for transport, storage, erection, operation and maintenance ................................. 18

9 Safety ............................................................................................................................ 18

10 Influence of products on the natural environment ........................................................... 18

Annexes ............................................................................................................................... 18

Annex 4A (normative) The mutual influence of current and voltage transformers ................. 19

Figure 401 – Geometrical construction of the circuit .............................................................. 14

Figure 402 – Measurement 4 ................................................................................................ 16

Figure 403 – Measurement 5 ................................................................................................ 16

Figure 404 – Error diagram of a voltage transformer class 0,2 .............................................. 17

Figure 405 – Error diagram of a current transformer class 0,2 at 5 % of rated current .......... 17

Figure 4A.1 – Current conductor and magnetic field influencing a voltage transformer ......... 20

Table 10 – List of tests.......................................................................................................... 11

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SIST EN 61869-4:2014
61869-4 © IEC:2013 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INSTRUMENT TRANSFORMERS –
Part 4: Additional requirements for combined 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.

This International Standard IEC 61869-4 has been prepared by IEC technical committee 38:

Instrument transformers.
This standard replaces IEC 60044-3: Combined transformers.
The text of this standard is based on the following documents:
FDIS Report on voting
38/468/FDIS 38/472/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: 9 ----------------------
SIST EN 61869-4:2014
– 4 – 61869-4 © IEC:2013

This standard is Part 4 of IEC 61869, published under the general title Instrument

transformers.

This Part 4 is to be read in conjunction with, and is based on, IEC 61869-1 General

Requirements – first edition (2007), IEC 61869-2, Additional requirements for current

transformers first edition (2012) and IEC 61869-3, Additional requirements for inductive

voltage transformers first edition (2011) – however, the reader is encouraged to use the most

recent edition of these documents.

This Part 4 follows the structure of IEC 61869-1, IEC 61869-2 and IEC 61869-3 and

supplements or modifies its corresponding clauses.

When a particular subclause of Part 1, 2 or 3 is not mentioned in this Part 4, that subclause

applies as far as is reasonable. When this standard states “addition”, “modification” or

“replacement”, the relevant text in Part 1, 2 or 3 is to be adapted accordingly.

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

system is used:

– clauses, subclauses, tables and figures that are numbered starting from 401 are additional

to those in Part 1, 2 or 3;
– additional annexes are lettered 4A, 4B, 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: 10 ----------------------
SIST EN 61869-4:2014
61869-4 © IEC:2013 – 5 –
PRODUCT FAMILY STANDARDS PRODUCT PRODUCTS OLD
STANDARD STANDARD
ADDITIONAL REQUIREMENTS FOR 60044-1
61869-2
CURRENT TRANSFORMERS
60044-6
ADDITIONAL REQUIREMENTS FOR 60044-2
61869-3
INDUCTIVE VOLTAGE TRANSFORMERS
61869-4 ADDITIONAL REQUIREMENTS FOR 60044-3
COMBINED TRANSFORMERS
61869-5 ADDITIONAL REQUIREMENTS FOR 60044-5
CAPACITIVE VOLTAGE TRANSFORMERS
61869-1
ADDITIONAL REQUIREMENTS FOR 60044-7
61869-6 61869-7
ELECTRONIC VOLTAGE
TRANSFORMERS
GENERAL
ADDITIONAL
REQUIREMENTS
GENERAL
FOR
REQUIREMENT 61869-8 ADDITIONAL REQUIREMENTS FOR 60044-8
INSTRUMENT
FOR LOW POWER ELECTRONIC CURRENT
TRANSFORMERS
TRANSFORMERS
INSTRUMENT
TRANSFORMERS
61869-9 DIGITAL INTERFACE FOR INSTRUMENT
TRANSFORMERS
61869-10 ADDITIONAL REQUIREMENTS FOR LOW-
POWER STAND-ALONE CURRENT
SENSORS
61869-11 ADDITIONAL REQUIREMENTS FOR LOW 60044-7
POWER STAND ALONE VOLTAGE
SENSORS
ADDITIONAL REQUIREMENTS FOR
61869-12
COMBINED ELECTRONIC INSTRUMENT
TRANSFORMER OR COMBINED STAND
ALONE SENSORS
STAND ALONE MERGING UNIT
61869-13
ADDITIONAL REQUIREMENTS FOR DC
61869-14
CURRENT TRANSFORMERS
61869-15 ADDITIONAL REQUIREMENTS FOR DC
VOLTAGE TRANSFORMERS
---------------------- Page: 11 ----------------------
SIST EN 61869-4:2014
– 6 – 61869-4 © IEC:2013

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.
---------------------- Page: 12 ----------------------
SIST EN 61869-4:2014
61869-4 © IEC:2013 – 7 –
INSTRUMENT TRANSFORMERS –
Part 4: Additional requirements for combined transformers
1 Scope

This part of IEC 61869 applies to newly-manufactured combined transformers for use with

electrical measuring instruments and electrical protective devices at frequencies from 15 Hz

to 100 Hz.

The requirements and tests of this standard, in addition to the requirements and tests of

IEC 61869-1, IEC 61869-2 and IEC 61869-3 cover current and inductive voltage transformers

that are necessary for combined instrument transformers.
2 Normative references
Clause 2 of IEC 61869-1:2007 is applicable with the following modifications:
Addition:
IEC 60028, International Standard of resistance for copper
IEC 60038, IEC standard voltages
IEC 61869-1:2007, Instrument Transformers – Part 1: General requirements

IEC 61869-2:2012, Instrument Transformers – Part 2: Additional requirements for current

transformers

IEC 61869-3:2011, Instrument Transformers – Part 3: Additional requirements for inductive

voltage transformers
3 Terms, definitions and abbreviations

For the purposes of this document, the terms and definitions given in IEC 61869-1:2007,

IEC 61869-2:2012 and IEC 61869-3:2011, as well as the following apply.
3.1 General definitions
3.1.401
combined instrument transformer

instrument transformer consisting of a current and a voltage transformer in the same

enclosure
3.1.402
error of voltage transformer

ratio error of voltage transformer determined with disconnected current transformer

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SIST EN 61869-4:2014
– 8 – 61869-4 © IEC:2013
3.1.403
phase displacement of voltage transformer

phase displacement of voltage transformer determined with disconnected current transformer

3.1.404
voltage induced by rated continuous thermal current

the voltage induced by the rated continuous thermal current of the current transformer in the

voltage transformer defined as a measure of the maximum variation of the voltage error

3.1.405
greatest variation of voltage error

the greatest possible variation of the ratio error of the voltage transformer due to voltage

induced by the rated continuous thermal current of the current transformer
3.1.406
greatest variation of phase displacement

the greatest possible variation of the phase displacement of the voltage transformer due to

voltage induced by the rated continuous thermal current of the current transformer

3.1.407
absolute value of the variations of voltage error

sum of the absolute values of the ratio error of the voltage transformer and the greatest

variation of the voltage error obtained at specified voltage
3.1.408
absolute value of the variations of phase displacement of voltage transformer

sum of the absolute values of the phase displacement of the voltage transformer and the

greatest variation of the phase displacement obtained at specified voltage
3.1.409
voltage induced at rated short-time thermal current

the voltage induced by the short-time thermal current of the current transformer in the voltage

transformer and marked on the rating plate
3.1.410
error of current transformer
ratio error of current transformer determined with unexcited voltage transformer
3.1.411
phase displacement of current transformer

phase displacement of current transformer determined with unexcited voltage transformer

3.1.412
voltage generated in the current transformer by capacitive current

voltage generated in the current transformer by capacitive current due to applied voltage of

the voltage transformer and defined as a measure of the maximum variation of the current

error
---------------------- Page: 14 ----------------------
SIST EN 61869-4:2014
61869-4 © IEC:2013 – 9 –
3.1.413
greatest variation of current error

the greatest possible variation of the ratio error of the current transformer due to voltage

generated in the current transformer by capacitive current
3.1.414
greatest variation of phase displacement

the greatest possible variation of the phase displacement of the current transformer due to

voltage generated in the current transformer by capacitive current
3.1.415
absolute value of the variations of current error

sum of the absolute values of the ratio error of the current transformer and the greatest

variation of the current error obtained at specified current
3.1.416
absolute value of the variations of phase displacement of current transformer

sum of the absolute values of the phase displacement of the current transformer and the

greatest variation of the phase displacement obtained at specified current
3.7 Index of abbreviations and symbols
Replacement:
ε error of voltage transformer
δ phase displacement of the voltage transformer
voltage induced by the rated continuous thermal current
Δε the greatest variation of the voltage error
U rated secondary voltage
Δδ the greatest variation of the phase displacement of the voltage transformer
ε′ the absolute value of the variations of the voltage error

δ′ the absolute value of the variations of the phase displacement of voltage transformer

rated short-time thermal current
rated continuous thermal current
cth
the voltage induced at rated short-time thermal current
error of current transformer
δ phase displacement of the current transformer
voltage generated in the current transformer by capacitive current
the greatest variation of the current error
Δδ the greatest variation of the phase displacement of the current transformer
the absolute value of the variations of the current error

δ’ the absolute value of the variations of the phase displacement of current transformer

I rated secondary current
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SIST EN 61869-4:2014
– 10 – 61869-4 © IEC:2013
4 Normal and special service conditions
Clause 4 of IEC 61869-1:2007 is applicable.
5 Ratings

Clause 5 of IEC 61869-1:2007, Clause 5 of IEC 61869-2:2012 and Clause 5 of IEC 61869-

3:2011 are applicable with the following modifications:
Additional subclause:
5.401 Additional requirements for measuring and protective combined transformer
5.401.1 General

The error limits for measuring combined transformers shall correspond to the requirements for

measuring current transformers, indicated in 5.6.201 of IEC 61869-2:2012, and to the

requirements for measuring voltage transformers indicated in 5.6.301 of IEC 61869-3:2011.

The limits of error for protective combined transformers shall correspond to the requirements

for protective current transformers indicated in 5.6.202 of IEC 61869-2:2012, and to the

requirements for protective voltage transformers indicated in 5.6.302 of IEC 61869-3:2011.

5.401.2 Mutual influence

When operating the current transformer between 5 % of the rated current and the rated

continuous thermal current, the voltage transformer shall not exceed the limits of voltage error

and phase displacement corresponding to its class within the specified range of burden and

between 80 % and 120 % of the rated voltage.

When operating the voltage transformer between 80 % of the rated voltage and the rated

voltage multiplied by the rated voltage factor, the current transformer shall not exceed the

limits of current error and phase displacement within the range of current corresponding to its

class and within the specified range of burden.
See 7.2.6.401 and 7.2.6.402 and Annex 4A.
6 Design and construction
Clause 6 of IEC 61869-1:2007, Clause 6 of IEC 61869-2:2012 and Clause 6 of
IEC 61869-3:2011 are applicable with the following modifications:
6.4 Requirements for temperature rise of parts and components
6.4.1 General

Subclause 6.4.1 of IEC 61869-2:2012 is applicable with the following modifications:

Addition:

The temperature rise of a combined instrument transformer shall not exceed the appropriate

values of 6.4 of IEC 61869-1:2007, if a voltage as indicated in 7.2.2 of IEC 61869-3:2011, is

applied to it and the current transformer is carrying a primary current equal to the rated

continuous thermal current. The current transformer is connected to a unity power factor

burden corresponding to the rated output and with the voltage transformer being loaded at

rated burden, or at the highest rated burden if there are several rated burdens, and at a power

factor between 0,8 lagging and unity. The additional tolerance of 10 K proposed in some

---------------------- Page: 16 ----------------------
SIST EN 61869-4:2014
61869-4 © IEC:2013 – 11 –

cases for the voltage transformers (see clause 7.2.2 of IEC 61869-3:2011) is also applicable

for the current transformers of the combined instrument transformers.
6.13 Markings
Additional subclauses:
6.13.401 Terminal markings

The terminals of the current and voltage transformer parts of combined instrument trans-

formers shall be marked in the same way as for individual transformers as specified in

6.13.201 of IEC 61869-2:2012 and 6.13.301 of IEC 61869-3:2011.
6.13.402 Rating plate marking
6.13.402.1 General rules

The specifications for the current transformer according to 6.13.202 of IEC 61869-2:2012 and

the voltage transformer according to 6.13.302 of IEC 61869-3:2011 shall be marked

separately on the rating plate.
6.13.402.2 Marking of the rating plate of a combined transformer

The voltage transformer shall carry on the rating plate the value of the voltage U induced by

the r.m.s. value of the rated short-time thermal current flowing through the current

transformer, when the primary winding of the voltage transformer is short-circuited. The

induced voltage is measured at the terminals of the secondary winding of the voltage

transformer loaded with 15 VA or the rated burden.

NOTE Instead of the voltage U induced by the r.m.s. value of the rated short-time thermal current, the rating

plate can carry the indication of the proportion of the induced voltage to the current flowing through the current

transformer in millivolts per kiloampere.
7 Tests

Clause 7 of IEC 61869-1:2007, Clause 7 of IEC 61869-2:2012 and Clause 7 of IEC 61869-

3:2011 are applicable with the following modifications:
7.1 General
7.1.2 List of tests
Replacement of Table 10:
Table 10 – List of tests
Tests Subclause
Type tests 7.2
Temperature-rise test 7.2.2
Impulse voltage withstand test on primary terminals 7.2.3
Wet test for outdoor type transformers 7.2.4
Electromagnetic Compatibility tests 7.2.5
Tests for accuracy 7.2.6
Verification of the degree of protection by enclosures 7.2.7
Enclosure tightness test at ambient temperature 7.2.8
Pressure test for the enclosure 7.2.9
---------------------- Page: 17 ----------------------
SIST EN 61869-4:2014
– 12 – 61869-4 © IEC:2013
Tests Subclause
Short-time current tests 7.2.201
Short-circuit withstand capability test 7.2.301
Routine tests 7.3
Power-frequency voltage withstand tests on primary terminals 7.3.1
Partial discharge measurement 7.3.2
Power-frequency voltage withstand tests between sections 7.3.3
Power-frequency voltage withstand tests on secondary terminals 7.3.4
Tests for accuracy 7.3.5
Verification of markings 7.3.6
Enclosure tightness test at ambient temperature 7.3.7
Pressure test for the enclosure 7.3.8
Determination of the secondary winding resistance 7.3.201
Determination of the secondary loop time constant 7.3.202
Rated knee point e.m.f. and maximum exciting current 7.3.203
Inter-turn overvoltage test 7.3.204
Special tests 7.4
Chopped impulse voltage withstand test on primary terminals 7.4.1
Multiple chopped impulse test on primary terminals 7.4.2
Measurement of capacitance and dielectric dissipation factor 7.4.3
Transmitted overvoltage test 7.4.4
Mechanical tests 7.4.5
Internal arc fault test 7.4.6
Enclosure tightness test at low and high temperatures 7.4.7
Gas dew point test 7.4.8
Corrosion test 7.4.9
Fire hazard test 7.4.10
Sample tests 7.5
Determination of the remanence factor 7.5.1
Determination of the instrument security factor (FS) of measuring current 7.5.2
transformers
7.2 Type tests
7.2.2 Temperature-rise test
Replacement of the first sentence by the following:
A test shall be made in order to prove compliance with 6.4.1.
Addition:

When there is more than one secondary winding, the tests shall be made with the appropriate

rated burden connected to each secondary winding unless otherwise agreed between
manufacturer and user. For the test, the transformer shall be mounted
...

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