EN 60990:2016

Methods of measurement of touch current and protective conductor current

IEC 60990:2016 is available as IEC 60990:2016 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition. IEC 60990:2016 defines measurement methods for d.c. or a.c. current of sinusoidal or non-sinusoidal waveform, which could flow through the human body, and current flowing through a protective conductor. The measuring methods recommended for TOUCH CURRENT are based upon the possible effects of current flowing through a human body. In this standard, measurements of current through networks representing the impedance of the human body are referred to as measurements of TOUCH CURRENT. These networks are not necessarily valid for the bodies of animals. The specification or implication of specific limit values is not within the scope of this standard. IEC TS 60479 series provides information regarding the effects of current passing through the human body from which limit values may be derived. This standard is applicable to all classes of EQUIPMENT, according to IEC 61140. The methods of measurement in this standard are not intended to be used for TOUCH CURRENTS having less than 1 s duration, patient currents as defined in IEC 60601-1, a.c. at frequencies below 15 Hz, and currents above those chosen for ELECTRIC BURN limits. This third edition cancels and replaces the second edition published in 1999. It constitutes a technical revision. The principal changes in this edition as compared with the second edition are as follows: - the effects names have been updated to reflect increased understanding of the range of effects and is in concert with present usage; - the conditions of use invoking a GRIPPABLE PART have been reduced in the application of the requirements based upon the current understanding of this effect; - the references to ISO 10012-1, which has been replaced by management standard of the same number, have been replaced with explanatory text, where needed to maintain the sense of the document; - former informative Annex H (GRIPPABLE PART) has been deleted from this update as it does not properly represent the full set of conditions under which immobilization can occur. A new informative Annex H (Analysis of frequency filtered touch current circuits measurement) has been added and the Bibliography (formerly Annex M) has been updated with additional references for completeness. This basic safety publication is primarily intended for use by technical committees in the preparation of standards in accordance with the principles laid down in IEC Guide 104 and ISO/IEC Guide 51. It is not intended for use by manufacturers or certification bodies independent of product standards. Key words: Touch Current, Protective Conductor Current, Current Flow

Verfahren zur Messung von Berührungsstrom und Schutzleiterstrom

Méthodes de mesure du courant de contact et du courant dans le conducteur de protection

L'IEC 60990:2016 définit des méthodes de mesure pour les courants continus ou les courants alternatifs de forme d'onde sinusoïdale ou non sinusoïdale qui peuvent traverser le corps humain, et les courants qui peuvent circuler dans un conducteur de protection. Les méthodes de mesure recommandées pour le COURANT DE CONTACT sont basées sur les effets possibles provoqués par le passage du courant dans le corps humain. Dans la présente norme, les mesurages de courant à travers des réseaux représentant l'impédance du corps humain sont appelés mesurages du COURANT DE CONTACT. Les réseaux utilisés ne sont pas nécessairement valables pour des animaux. La spécification ou l'implication de valeurs limites spécifiques ne fait pas partie du domaine d'application de la présente norme. La série IEC TS 60479 fournit des informations concernant les effets du courant traversant le corps humain, à partir desquelles des valeurs limites peuvent être déduites. La présente norme est applicable à toutes les classes de MATERIELS, conformément à l'IEC 61140. Les méthodes de mesure indiquées dans la présente norme ne sont pas destinées à être utilisées pour les COURANTS DE CONTACT de durée inférieure à 1 s, les courants patients tels qu'ils sont définis dans l'IEC 60601-1, les courants alternatifs de fréquence inférieure à 15 Hz, et les courants supérieurs aux courants choisis pour les limites de BRULURE ELECTRIQUE. Cette troisième édition annule et remplace la deuxième édition, parue en 1999. Cette édition constitue une révision technique. Cette édition inclut les modifications majeures suivantes par rapport à la deuxième édition: - les désignations des effets ont été mises à jour pour refléter la meilleure compréhension de la plage des effets et s'accorder avec l'utilisation actuelle; - les conditions d'utilisation impliquant une PARTIE PREHENSIBLE ont été réduites pour l'application des exigences fondées sur la compréhension actuelle de cet effet; - les références à l'ISO 10012-1, qui a été remplacée par une norme de management portant le même numéro, ont été remplacées par un texte explicatif, le cas échéant, afin de conserver le sens du document; - l'ancienne Annexe H informative (PARTIE PREHENSIBLE) a été supprimée de cette mise à jour car elle ne représente pas de manière adéquate l'intégralité des conditions dans lesquelles une immobilisation est susceptible de se produire. Une nouvelle Annexe H informative (Analyse du mesurage de circuits de courant de contact avec filtre de fréquence) a été ajoutée et la Bibliographie (anciennement dénommée Annexe M) a été mise à jour avec des références supplémentaires par souci d'exhaustivité. La présente publication fondamentale de sécurité est destinée principalement à être utilisée par les comités d'études lors de la préparation de normes conformément aux principes figurant dans le Guide IEC 104 et le Guide ISO/IEC 51. Elle n'est pas destinée à être utilisée par les fabricants ou les organismes de certification indépendants de normes de produit. Mots-clés: courant de contact, courant dans le conducteur de protection, passage du courant

Metode merjenja toka dotika in toka v zaščitnem vodniku

Ta mednarodni standard opredeljuje metode merjenja za:
– enosmerni ali izmenični tok sinusoidne ali nesinusoidne valovne oblike, ki lahko teče skozi človeško telo, in
– tok, ki teče skozi zaščitni vodnik.
Metode, priporočene za merjenje TOKA DOTIKA, temeljijo na možnih učinkih toka, ki teče skozi človeško telo. Meritve toka v omrežjih, ki predstavljajo impedanco človeškega telesa, se v tem standardu imenujejo meritve TOKA DOTIKA. Ta omrežja ne veljajo nujno za živalska telesa.
Specifikacija ali vpliv določenih mejnih vrednosti nista zajeta v tem standardu.
Skupina standardov IEC TS 60479 vsebuje informacije v zvezi z učinki toka, ki teče skozi človeško telo, na podlagi katerih je mogoče izračunati mejne vrednosti.
V skladu s standardom IEC 61140 se ta standard uporablja za vse razrede OPREME.
Metode merjenja v tem standardu niso namenjene za uporabo za:
– TOKE DOTIKA, ki trajajo manj kot 1 s,
– tokove bolnikov, kot so opredeljeni v standardu IEC 60601-1,
– izmenični tok s frekvencami, nižjimi od 15 Hz, in
– tokove z vrednostmi nad mejnimi vrednostmi za ELEKTRIČNE OPEKLINE.
Ta osnovna varnostna publikacija je namenjena predvsem tehničnim odborom za pripravo standardov v skladu z načeli vodil IEC 104 in ISO/IEC 51. Ni namenjena proizvajalcem ali certifikacijskim organom, ki so neodvisni od standardov za proizvode.
Ena od pristojnosti tehničnih odborov je, da med pripravo publikacij uporabljajo osnovne varnostne publikacije, kadar je to primerno. Zahteve, preskusne metode ali preskusni pogoji iz te osnovne varnostne publikacije se uporabljajo le, če so izrecno navedeni ali zajeti v ustreznih publikacijah.

General Information

• Status: Published
• Publication Date: 01-Sep-2016
• Withdrawal Date: 03-Jul-2019
• ICS: 17.220 - Electricity. Magnetism. Electrical and magnetic measurements
• ICS: 35.020 - Information technology (IT) in general
• Technical Committee: CLC/TC 108X - Safety of electronic equipment within the fields of Audio/Video, Information Technology and Communication Technology
• Drafting Committee: IEC/TC 108 - IEC_TC_108
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 02-Sep-2016
• Completion Date: 02-Sep-2016
• Ref Project: SIST EN 60990:2017 - Methods of measurement of touch current and protective conductor current

Relations

• Replaces: EN 60990:1999 - Methods of measurement of touch current and protective conductor current
• Effective Date: 27-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-februar-2017
Nadomešča:
SIST EN 60990:2002
Metode merjenja toka dotika in toka v zaščitnem vodniku
Methods of measurement of touch current and protective conductor current
Verfahren zur Messung von Berührungsstrom und Schutzleiterstrom
Méthodes de mesure du courant de contact et du courant dans le conducteur de
protection
Ta slovenski standard je istoveten z: EN 60990:2016
ICS:
13.260 Varstvo pred električnim Protection against electric
udarom. Delo pod napetostjo shock. Live working
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 60990
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2016
ICS 17.220; 35.020 Supersedes EN 60990:1999
English Version
Methods of measurement of touch current and
protective conductor current
(IEC 60990:2016)
Méthodes de mesure du courant de contact et  Verfahren zur Messung von Berührungsstrom und
du courant dans le conducteur de protection Schutzleiterstrom
(IEC 60990:2016) (IEC 60990:2016)
This European Standard was approved by CENELEC on 2016-07-04. 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, 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
© 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 60990:2016 E
European foreword
The text of document 108/630/FDIS, future edition 3 of IEC 60990, prepared by IEC/TC 108 "Safety of
electronic equipment within the field of audio/video, information technology and communication
technology" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
• latest date by which the document has to be implemented at (dop) 2017-04-04
national level by publication of an identical national
standard or by endorsement
(dow) 2019-07-04
• latest date by which the national standards conflicting with
the document have to be withdrawn

This document supersedes EN 60990:1999
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.
Endorsement notice
The text of the International Standard IEC 60990:2016 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:
IEC 60065 NOTE Harmonized as EN 60065.
IEC 60309-1:1999 NOTE Harmonized as EN 60309-1:1999 (not modified).
IEC 60335-1 NOTE Harmonized as EN 60335-1.
IEC 60364-1 NOTE Harmonized as HD 60364-1.
IEC 60364-4-41:2005 NOTE Harmonized as HD 60364-4-41:2007 (modified).
IEC 60601-1 NOTE Harmonized in EN 60601-1 series.
IEC 60950-1 NOTE Harmonized as EN 60950-1.
IEC 61010-1 NOTE Harmonized as EN 61010-1.
IEC 62368-1 NOTE Harmonized as EN 62368-1.

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 1 When 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/TS 60479-1 2005 Effects of current on human beings and - -
livestock -
Part 1: General aspects
IEC/TS 60479-2 2007 Effects of current on human beings and - -
livestock -
Part 2: Special aspects
IEC 61140 -  Protection against electric shock - EN 61140 -
Common aspects for installation and
equipment
ISO/IEC Guide 51 2014 Safety aspects - Guidelines for their - -
inclusion in standards
IEC Guide 104 2010 The preparation of safety publications - -
and the use of basic safety publications
and group safety publications
IEC 60990 ®
Edition 3.0 2016-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Methods of measurement of touch current and protective conductor current

Méthodes de mesure du courant de contact et du courant dans le conducteur de

protection
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.220, 35.020 ISBN 978-2-8322-3420-4

– 2 – IEC 60990:2016 © IEC 2016
CONTENTS
FOREWORD .6
INTRODUCTION .8
1 Scope . 10
2 Normative references . 10
3 Terms and definitions . 11
4 Test site . 11
4.1 Test site environment . 11
4.2 Test transformer . 12
4.3 Earthed neutral conductor . 12
5 Measuring equipment . 13
5.1 Selection of measuring network . 13
5.1.1 General . 13
5.1.2 Perception and startle-reaction . 14
5.1.3 Letgo-immobilization . 14
5.1.4 Electric burn (a.c.) . 14
5.1.5 Ripple-free d.c. . 14
5.2 Test electrodes . 15
5.2.1 Construction . 15
5.2.2 Connection . 15
5.3 Configuration . 15
5.4 Power connections during test . 15
5.4.1 General . 15
5.4.2 Equipment for use only on TN or TT star power distribution systems . 19
5.4.3 Equipment for use on IT power distribution systems including
unearthed delta systems . 19
5.4.4 Equipment for use on single-phase centre-earthed power supply
systems or on centre-earthed delta power supply systems . 20
5.5 Supply voltage and frequency . 20
5.5.1 Supply voltage . 20
5.5.2 Supply frequency . 20
6 Test procedure . 20
6.1 General . 20
6.1.1 Touch current measurements . 20
6.1.2 Control switches, equipment and supply conditions . 21
6.1.3 Use of measuring networks . 21
6.2 Normal and fault conditions of equipment . 21
6.2.1 Normal operation of equipment . 21
6.2.2 Equipment and supply fault conditions . 21
7 Evaluation of results . 23
7.1 Perception, startle-reaction and letgo-immobilization . 23
7.2 Electric burn . 23
8 Measurement of protective conductor current . 23
8.1 General . 23
8.2 Multiple equipment . 24
8.3 Measuring method . 24

IEC 60990:2016 © IEC 2016 – 3 –
Annex A (normative) Equipment . 25
Annex B (normative) Use of a conductive plane . 26
Annex C (normative) Incidentally connected parts . 27
Annex D (informative) Choice of current limits . 28
D.1 General . 28
D.2 Limit examples . 28
D.2.1 Ventricular fibrillation . 28
D.2.2 Inability to letgo-immobilization . 28
D.2.3 Startle-reaction . 28
D.2.4 Perception threshold . 28
D.2.5 Special applications . 28
D.3 Choice of limits . 29
D.4 Electric burn effects of touch current . 30
Annex E (informative) Networks for use in measurement of touch current . 31
E.1 General . 31
E.2 Body impedance network – Figure 3 . 31
E.3 Startle-reaction (and body impedance) network – Figure 4 . 31
E.4 Letgo-immobilization (and body impedance) network – Figure 5 . 32
Annex F (informative) Measuring network limitations and construction . 33
Annex G (informative) Construction and application of touch current measuring
instruments . 35
G.1 Considerations for selection of components . 35
G.1.1 General .
...

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Methods of measurement of touch current and protective conductor current17.220.20Measurement of electrical and magnetic quantities13.260Protection against electric shock. Live workingICS:Ta slovenski standard je istoveten z:EN 60990:2016SIST EN 60990:2017en01-februar-2017SIST EN 60990:2017SLOVENSKI
STANDARDSIST EN 60990:20021DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 60990
September 2016 ICS 17.220; 35.020
Supersedes
EN 60990:1999
English Version
Methods of measurement of touch current and protective conductor current (IEC 60990:2016)
Méthodes de mesure du courant de contact et
du courant dans le conducteur de protection (IEC 60990:2016)
Verfahren zur Messung von Berührungsstrom und Schutzleiterstrom (IEC 60990:2016) This European Standard was approved by CENELEC on 2016-07-04. 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, 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 © 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 60990:2016 E SIST EN 60990:2017

This document supersedes EN 60990:1999 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. Endorsement notice The text of the International Standard IEC 60990:2016 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indicated: IEC 60065 NOTE Harmonized as EN 60065. IEC 60309-1:1999 NOTE Harmonized as EN 60309-1:1999 (not modified). IEC 60335-1 NOTE Harmonized as EN 60335-1. IEC 60364-1 NOTE Harmonized as HD 60364-1. IEC 60364-4-41:2005 NOTE Harmonized as HD 60364-4-41:2007 (modified). IEC 60601-1 NOTE Harmonized in EN 60601-1 series. IEC 60950-1 NOTE Harmonized as EN 60950-1. IEC 61010-1 NOTE Harmonized as EN 61010-1. IEC 62368-1 NOTE Harmonized as EN 62368-1.
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 1 When 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/TS 60479-1 2005
Effects of current on human beings and livestock - Part 1: General aspects - -
IEC/TS 60479-2 2007
Effects of current on human beings and livestock - Part 2: Special aspects - -
IEC 61140 -
Protection against electric shock - Common aspects for installation and equipment EN 61140 -
ISO/IEC Guide 51 2014
Safety aspects - Guidelines for their inclusion in standards - -
IEC Guide 104 2010 The preparation of safety publications and the use of basic safety publications and group safety publications - -
IEC 60990 Edition 3.0 2016-05 INTERNATIONAL STANDARD NORME INTERNATIONALE Methods of measurement of touch current and protective conductor current
Méthodes de mesure du courant de contact et du courant dans le conducteur de protection
INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE
ICS 17.220, 35.020
ISBN 978-2-8322-3420-4
– 2 – IEC 60990:2016 © IEC 2016
CONTENTS FOREWORD .6 INTRODUCTION .8 1 Scope . 10 2 Normative references . 10 3 Terms and definitions . 11 4 Test site . 11 4.1 Test site environment . 11 4.2 Test transformer . 12 4.3 Earthed neutral conductor . 12 5 Measuring equipment . 13 5.1 Selection of measuring network . 13 5.1.1 General . 13 5.1.2 Perception and startle-reaction . 14 5.1.3 Letgo-immobilization . 14 5.1.4 Electric burn (a.c.) . 14 5.1.5 Ripple-free d.c. . 14 5.2 Test electrodes . 15 5.2.1 Construction . 15 5.2.2 Connection . 15 5.3 Configuration . 15 5.4 Power connections during test . 15 5.4.1 General . 15 5.4.2 Equipment for use only on TN or TT star power distribution systems . 19 5.4.3 Equipment for use on IT power distribution systems including unearthed delta systems . 19 5.4.4 Equipment for use on single-phase centre-earthed power supply systems or on centre-earthed delta power supply systems . 20 5.5 Supply voltage and frequency . 20 5.5.1 Supply voltage . 20 5.5.2 Supply frequency . 20 6 Test procedure . 20 6.1 General . 20 6.1.1 Touch current measurements . 20 6.1.2 Control switches, equipment and supply conditions . 21 6.1.3 Use of measuring networks . 21 6.2 Normal and fault conditions of equipment . 21 6.2.1 Normal operation of equipment . 21 6.2.2 Equipment and supply fault conditions . 21 7 Evaluation of results . 23 7.1 Perception, startle-reaction and letgo-immobilization . 23 7.2 Electric burn . 23 8 Measurement of protective conductor current . 23 8.1 General . 23 8.2 Multiple equipment . 24 8.3 Measuring method . 24 SIST EN 60990:2017

IEC 60990:2016 © IEC 2016 – 3 –
Annex A (normative)
Equipment . 25 Annex B (normative)
Use of a conductive plane . 26 Annex C (normative)
Incidentally connected parts . 27 Annex D (informative)
Choice of current limits . 28 D.1 General . 28 D.2 Limit examples . 28 D.2.1 Ventricular fibrillation . 28 D.2.2 Inability to letgo-immobilization . 28 D.2.3 Startle-reaction . 28 D.2.4 Perception threshold . 28 D.2.5 Special applications . 28 D.3 Choice of limits . 29 D.4 Electric burn effects of touch current . 30 Annex E (informative)
Networks for use in measurement of touch current . 31 E.1 General . 31 E.2 Body impedance network – Figure 3 . 31 E.3 Startle-reaction (and body impedance) network – Figure 4 . 31 E.4 Letgo-immobilization (and body impedance) network – Figure 5 . 32 Annex F (informative)
Measuring network limitations and construction . 33 Annex G (informative)
Construction and application of touch current measuring instruments . 35 G.1 Considerations for selection of components . 35 G.1.1 General . 35 G.1.2 Power rating and inductance for RS and RB . 35 G.1.3 Capacitor CS . 35 G.1.4 Resistors R1, R2 and R3 . 36 G.1.5 Capacitors C1, C2 and C3. 36 G.2 Voltmeter . 36 G.3 Accuracy . 36 G.4 Calibration and application of measuring instruments . 37 G.5 Records . 37 G.6 Confirmation systems . 37 Annex H (informative)
An
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