EN IEC 60477-1:2022

Laboratory resistors - Part 1: Laboratory DC resistors

IEC 60477-1:2022 applies to resistors intended for use as laboratory DC resistors (hereinafter referred to as "resistors") comprising standard resistors, single or multiple resistors of accuracy Classes 0,000 05 to 10 and single or multi-dial resistors of accuracy Classes 0,000 5 to 10. This document does not apply to: 1) resistors which are intended for use solely as permanently mounted circuit components, 2) resistors used on alternating current or on pulsed current, 3) active resistors, 4) series resistors and shunts which are considered as accessories of electrical measuring instruments in the relevant IEC document (examples of these are as follows). IEC 60477-1:2022 cancels and replaces the first edition of IEC 60477 published in 1974, and its Amendment 1:1997. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) extended the resistor accuracy classes; b) deleted the resistor accuracy class expression in parts per million (ppm); c) excluded the active resistor from the scope of this document; d) updated the terms and definitions according to new IEC 60050 series; e) changed the term "resistance decade" to "resistance dial" to cover the multi-dial resistors with other resistance step values; f) updated the intrinsic error to intrinsic uncertainty according to IEC 60359; g) added the limits of relative stability for resistors of classes 0,000 05 to 0,01; h) added the requirements of high voltage resistors; i) updated the safety symbols and requirements according to the new IEC 61010 series; j) updated the insulation resistance requirements of resistors; k) added the requirements of temperature coefficient; l) updated the temperature requirements for transport and storage of resistors.

Labor-Widerstände - Teil 1: Labor-Gleichstromwiderstände

Résistances de laboratoire - Partie 1: Résistances de laboratoire à courant continu

L'IEC 60477-1:2022 s’applique aux résistances destinées à être utilisées comme résistances de laboratoire à courant continu (ci-après désignées "résistances"), comprenant des résistances étalons, des résistances simples ou multiples des classes de précision 0,000 05 à 10 et des résistances à commutateurs simples ou multiples des classes de précision 0,000 5 à 10. Le présent document ne s’applique pas: 1) aux résistances qui sont destinées à être utilisées seulement comme composants, branchées de façon permanente dans des circuits; 2) aux résistances utilisées en courant alternatif ou en courant impulsionnel; 3) aux résistances actives; 4) aux résistances additionnelles et aux shunts qui sont considérés comme accessoires des appareils de mesure électriques dans le document correspondant de l’IEC (en voici des exemples). L'IEC 60477-1:2022 annule et remplace la première édition de l’IEC 60477 parue en 1974 et son Amendement 1:1997. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l’édition précédente: a) extension des classes de précision des résistances; b) suppression de l’expression classe de précision d’une résistance en parties par million (ppm); c) exclusion de la résistance active du domaine d’application du présent document; d) mise à jour des termes et définitions conformément à la nouvelle série IEC 60050; e) remplacement du terme "résistance à décade" par "commutateur de résistance" pour couvrir les résistances à commutateurs multiples avec d’autres valeurs d’échelon de résistance; f) mise à jour de l’erreur intrinsèque à l’incertitude intrinsèque conformément à l’IEC 60359; g) ajout des limites de stabilité relative pour les résistances de classes 0,000 05 à 0,01; h) ajout des exigences relatives aux résistances haute tension; i) mise à jour des symboles de sécurité et des exigences conformément à la nouvelle série IEC 61010; j) mise à jour des exigences de résistance d’isolement d’une résistance; k) ajout des exigences relatives au coefficient de température; l) mise à jour des exigences de température pour le transport et le stockage des résistances.

Laboratorijski upori - 1. del: Laboratorijski upori za enosmerni tok (IEC 60477-1:2022)

Ta dokument se uporablja za upore, namenjene za uporabo kot laboratorijski upori za enosmerni tok (v nadaljevanju: »upori«), ki vključujejo standardne upore, enega ali več uporov razredov natančnosti od 0,00005 do 10 ter enega ali več uporov razredov natančnosti od 0,0005 do 10. Ta dokument se ne uporablja za: 1) upore, ki so predvideni izključno za uporabo kot trajno nameščeni sestavni deli vezja, 2) upore, ki se uporabljajo pri izmeničnem ali pulzirajočem toku, 3) aktivne upore, 4) zaporedne upore in upornike, ki so v ustreznem dokumentu IEC obravnavani kot pribor električnih merilnih instrumentov (primeri teh dokumentov so navedeni v nadaljevanju). PRIMER 1 – skupina standardov IEC 60051: priporočila za neposredno delujoče kazalne analogne električne merilne instrumente in njihov pribor. PRIMER 2 – IEC 60258: neposredno delujoči zapisovalni električni merilni instrumenti in njihov pribor.

General Information

• Status: Published
• Publication Date: 12-May-2022
• ICS: 17.220.20 - Measurement of electrical and magnetic quantities
• ICS: 31.040.01 - Resistors in general
• Technical Committee: CLC/TC 85X - Measuring equipment for electrical and electromagnetic quantities
• Drafting Committee: IEC/TC 85 - IEC_TC_85
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 13-May-2022
• Completion Date: 13-May-2022
• Directive: 2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Mandate: M/511 - Mandate to CEN, CENELEC and ETSI relating to harmonised standards in the field of the Low Voltage Directive
• Ref Project: SIST EN IEC 60477-1:2022 - Laboratory resistors - Part 1: Laboratory DC resistors (IEC 60477-1:2022)

Relations

• Replaces: EN 60477:1997 - Laboratory d.c. resistors
• Effective Date: 17-May-2022
• Replaces: EN 60477:1997/A1:1997 - Laboratory d.c. resistors
• Effective Date: 12-Oct-2021

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2022
Nadomešča:
SIST EN 60477:2000
SIST EN 60477:2000/A1:2000
Laboratorijski upori - 1. del: Laboratorijski upori za enosmerni tok (IEC 60477-
1:2022)
Laboratory resistors - Part 1: Laboratory DC resistors (IEC 60477-1:2022)
Labor-Widerstände - Teil 1: Labor-Gleichstromwiderstände (IEC 60477-1:2022)
Résistances de laboratoire - Partie 1: Résistances de laboratoire à courant continu (IEC
60477-1:2022)
Ta slovenski standard je istoveten z: EN IEC 60477-1:2022
ICS:
17.220.20 Merjenje električnih in Measurement of electrical
magnetnih veličin and magnetic quantities
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 60477-1

NORME EUROPÉENNE
EUROPÄISCHE NORM May 2022
ICS 17.220.20; 31.040.01 Supersedes EN 60477:1997 + A1:1997
English Version
Laboratory resistors - Part 1: Laboratory DC resistors
(IEC 60477-1:2022)
Résistances de laboratoire - Partie 1: Résistances de Labor-Widerstände - Teil 1: Labor-Gleichstromwiderstände
laboratoire à courant continu (IEC 60477-1:2022)
(IEC 60477-1:2022)
This European Standard was approved by CENELEC on 2022-05-04. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60477-1:2022 E

European foreword
The text of document 85/821/FDIS, future edition 1 of IEC 60477-1, prepared by IEC/TC 85
"Measuring equipment for electrical and electromagnetic quantities" was submitted to the IEC-
CENELEC parallel vote and approved by CENELEC as EN IEC 60477-1:2022.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2023-02-04
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2025-05-04
document have to be withdrawn
This document supersedes EN 60477:1997 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.
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 60477-1:2022 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 60051 (series) NOTE Harmonized as EN IEC 60051 (series)
IEC 60258 NOTE Harmonized as HD 368 S1
IEC 60359:2001 NOTE Harmonized as EN 60359:2002 (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.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60027 series Letter symbols to be used in electrical EN IEC 60027 series
technology
IEC 60417 series Graphical symbols for use on equipment - -
Safety requirements for electrical
IEC 61010-1 2010 EN 61010-1 2010
equipment for measurement, control, and
laboratory use - Part 1: General
requirements
+ A1 (mod) 2016  + A1 2019
IEC 61010-2-030 - Safety requirements for electrical EN IEC 61010-2-030 -
equipment for measurement, control, and
laboratory use - Part 2-030: Particular
requirements for equipment having testing
or measuring circuits
IEC 60477-1 ®
Edition 1.0 2022-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Laboratory resistors –
Part 1: Laboratory DC resistors

Résistances de laboratoire –
Partie 1: Résistances de laboratoire à courant continu

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.220.20; 31.040.01 ISBN 978-2-8322-1092-6

– 2 – IEC 60477-1:2022 © IEC 2022
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
3.1 General terms . 7
3.2 Characteristic values . 9
3.3 Accuracy class, class index . 10
3.4 Influence quantities, reference conditions, nominal range of use . 11
3.5 Uncertainty and variations. 13
4 Classification and construction . 16
4.1 Classification . 16
4.2 Construction . 16
5 Limits of intrinsic uncertainty . 16
5.1 General . 16
5.2 Requirement for multiple resistors . 17
6 Reference conditions . 17
7 Permissible variations . 18
7.1 Limits of variation. 18
7.2 Conditions for the determination of the variations . 19
7.3 Influence of self-heating (power dissipation) . 19
7.4 Influence of position . 20
8 Further electrical and mechanical requirements . 20
8.1 Electrical safety requirements . 20
8.2 Insulation resistance . 20
8.3 Storage and transport conditions . 20
8.4 Terminal . 20
8.5 Provision of temperature measuring facilities . 21
8.6 Guarding and screening requirements . 21
9 Information, markings and symbols . 21
9.1 Information . 21
9.2 Markings, symbols and their locations . 22
9.3 Marking relating to the reference conditions and nominal ranges of use . 22
Annex A (informative) Reference information . 25
A.1 Thermoelectric effects (see Clause 6, Note 2) . 25
A.2 Reference range and nominal range of use . 25
A.3 Example of marking for a single resistor . 26
A.4 Example of marking for a five-dial resistor . 26
Bibliography . 27

Figure A.1 – Effect of temperature . 25
Figure A.2 – Example of marking for a single resistor . 26
Figure A.3 – Example of marking for a five-dial resistor . 26

Table 1 – Limits of intrinsic relative uncertainty and limits of relative stability . 17
Table 2 – Reference conditions and permissible range of influence quantities . 18

IEC 60477-1:2022 © IEC 2022 – 3 –
Table 3 – Nominal range of use for influence quantities (applicable unless marked
otherwise) . 19
Table 4 – Examples of markings for temperature . 23
Table 5 – Symbols for marking resistors . 24

– 4 – IEC 60477-1:2022 © IEC 2022
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
LABORATORY RESISTORS –
Part 1: Laboratory DC resistors

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
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any IEC Publication and the corresponding national or
...