EN IEC 60076-19-1:2023

SLOVENSKI STANDARD
01-september-2023
Močnostni transformatorji - 19-1. del: Pravila za določanje negotovosti meritve
izgub močnostnih transformatorjev
Power transformers - Part 19-1: Rules for the determination of uncertainties in the
measurement of the losses of power transformers
Leistungstransformatoren - Teil 19: Regeln für die Bestimmung von Unsicherheiten in
der Messung der Verluste von Leistungstransformatoren und Drosselspulen
Transformateurs de puissance - Partie 19-1: Règles pour la détermination des
incertitudes de mesure des pertes des transformateurs de puissance
Ta slovenski standard je istoveten z: EN IEC 60076-19-1:2023
ICS:
29.180 Transformatorji. Dušilke Transformers. Reactors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 60076-19-1

NORME EUROPÉENNE
EUROPÄISCHE NORM June 2023
ICS 29.180 Supersedes EN 60076-19:2015
English Version
Power transformers - Part 19-1: Rules for the determination of
uncertainties in the measurement of the losses of power
transformers
(IEC 60076-19-1:2023)
Transformateurs de puissance - Partie 19-1: Règles pour la Leistungstransformatoren - Teil 19: Regeln für die
détermination des incertitudes de mesure des pertes des Bestimmung von Unsicherheiten in der Messung der
transformateurs de puissance Verluste von Leistungstransformatoren und Drosselspulen
(IEC 60076-19-1:2023) (IEC 60076-19-1:2023)
This European Standard was approved by CENELEC on 2023-06-27. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye 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
© 2023 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60076-19-1:2023 E

European foreword
The text of document 14/1105/FDIS, future edition 1 of IEC 60076-19-1, prepared by IEC/TC 14
"Power transformers" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC
as EN IEC 60076-19-1:2023.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2024-03-27
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2026-06-27
document have to be withdrawn
This document supersedes EN 60076-19:2015 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a Standardization Request given to CENELEC by the
European Commission and the European Free Trade Association.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 60076-19-1:2023 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 standard indicated:
IEC 60060-2 NOTE Approved as EN 60060-2
IEC 61869-1 NOTE Approved as EN 61869-1
IEC 61869-2 NOTE Approved as EN 61869-2
IEC 61869-3 NOTE Approved as EN 61869-3
ISO/IEC 17025:2017 NOTE Approved as EN ISO/IEC 17025:2017 (not modified)
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.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60076-1 - Power transformers - Part 1: General EN 60076-1 -
IEC 60076-2 - Power transformers - Part 2: Temperature rise EN 60076-2 -
for liquid-immersed transformers
IEC 60076-11 2018 Power transformers - Part 11: Dry-type EN IEC 60076-11 2018
transformers
IEC 60076-19-1 ®
Edition 1.0 2023-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Power transformers –
Part 19-1: Rules for the determination of uncertainties in the measurement of the

losses of power transformers
Transformateurs de puissance –

Partie 19-1: Règles pour la détermination des incertitudes de mesure des pertes

des transformateurs de puissance

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.180  ISBN 978-2-8322-7024-0

– 2 – IEC 60076-19-1:2023 © IEC 2023
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 9
2 Normative references . 9
3 Terms and definitions . 9
4 Symbols . 11
4.1 General symbols . 11
4.2 Symbols for uncertainty . 12
4.2.1 General designations . 12
4.2.2 Specific designations . 12
5 Power measurement, systematic deviation and uncertainty . 12
5.1 General . 12
5.2 Traceability . 13
5.3 Model function . 13
5.4 Measuring systems . 13
6 Procedures for no-load loss measurement . 13
6.1 General . 13
6.2 Model function for no-load losses at reference conditions . 14
6.3 Uncertainty budget for no-load loss . 15
7 Procedures for load loss measurement . 16
7.1 General . 16
7.2 Model function for load loss measurement at rated current . 16
7.3 Model function for load loss at rated current and reference temperature . 17
7.4 Uncertainty budget for the measured power P recalculated to rated current . 18
7.4.1 General . 18
7.4.2 Uncertainties of measured load loss power P at ambient temperature θ . 18
2 2
7.5 Uncertainty budget for reported load loss at reference temperature . 18
8 Three-phase power calculations . 19
9 Reporting. 20
10 Estimate of corrections and uncertainty contributions . 20
10.1 Instrument transformers . 20
10.1.1 General . 20
10.1.2 Ratio error of instrument transformers . 21
10.1.3 Phase displacement of instrument transformers . 22
10.2 Voltage and current measurements . 24
10.3 Power meter . 25
10.4 Advanced system with specified system uncertainty . 25
10.5 Correction to sinusoidal waveform . 26
10.6 Winding resistance measurement . 26
10.7 Winding temperature at load loss measurement . 27
10.7.1 General . 27
10.7.2 R and θ determined from temperature measurement . 27
2 2
10.7.3 R and θ determined by resistance measurement . 28
2 2
Annex A (informative) Example of no-load loss uncertainty evaluation – Advanced
measuring system . 30

IEC 60076-19-1:2023 © IEC 2023 – 3 –
A.1 General (intent of example) . 30
A.2 Transformer specification . 30
A.3 Measuring system . 30
A.4 Measurements . 31
A.5 Correction of measured values. 31
A.6 Calculation of uncertainty . 31
A.7 Reported loss and uncertainty estimate . 32
Annex B (informative) Example of no-load loss uncertainty evaluation – Calibration
based procedure . 33
B.1 General . 33
B.2 Transformer specification . 33
B.3 Measuring system . 33
B.4 Measurements . 34
B.5 Correction of measured values. 35
B.6 Uncertainty calculation . 35
B.7 Reported loss and uncertainty estimate . 36
Annex C (informative) Example of load loss uncertainty evaluation class index
procedure . 37
C.1 General .
...