Electrical accessories - Residual current monitors (RCMs) - Part 1: RCMs for household and similar uses (IEC 62020-1:2020 + COR1:2020)

2018-10-01: originally EN 62020:1998/prA2, changed  further to IEC change from IEC 62020/AMD2 Ed.1 to IEC 62020-1 Ed.1

Elektrisches Installationsmaterial - Differenzstrom-Überwachungsgeräte (RCMs) - Teil 1: RCMs für Hausinstallationen und ähnliche Verwendungen (IEC 62020-1:2020 + COR1:2020)

Petit appareillage électrique - Contrôleurs d'isolement à courant différentiel résiduel (RCM) - Partie 1: RCM pour usages domestiques et analogues (IEC 62020-1:2020 + COR1:2020)

L'IEC 62020-1:2020 s'applique aux contrôleurs d'isolement à courant différentiel résiduel pour usages domestiques et analogues, avec des tensions d'emploi assignées et une tension assignée du circuit surveillé ne dépassant pas 440 V en courant alternatif et des courants assignés ne dépassant pas 125 A. Cette première édition annule et remplace l'IEC 62020:1998 et l'IEC 62020:1998/AMD1:2003. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: – définitions des RCM de type F et de type B; – marquage des RCM de type F et de type B; – ajout d'un nouveau paragraphe,  REF _Ref521411992 \r \h \* MERGEFORMAT 8.20 08D0C9EA79F9BACE118C8200AA004BA90B02000000080000000E0000005F005200650066003500320031003400310031003900390032000000 ; – modification du  REF _Ref521412027 \r \h \* MERGEFORMAT 9.7 08D0C9EA79F9BACE118C8200AA004BA90B02000000080000000E0000005F005200650066003500320031003400310032003000320037000000 ; – mise à jour du  REF _Ref521412044 \r \h \* MERGEFORMAT 9.9 08D0C9EA79F9BACE118C8200AA004BA90B02000000080000000E0000005F005200650066003500320031003400310032003000340034000000 ; – modification du  REF _Ref521412054 \r \h \* MERGEFORMAT 9.14 08D0C9EA79F9BACE118C8200AA004BA90B02000000080000000E0000005F005200650066003500320031003400310032003000350034000000 ; – modification du

Električni pribor - Nadzorovanje preostalega (difernečnega) toka (RCM) - 1. Del: RCM za gospodinjske in podobne namene (IEC 62020-1:2020 + COR1:2020)

General Information

Status
Published
Public Enquiry End Date
30-Jan-2019
Publication Date
08-Sep-2021
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
28-Apr-2021
Due Date
03-Jul-2021
Completion Date
09-Sep-2021

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SLOVENSKI STANDARD
SIST EN IEC 62020-1:2021
01-oktober-2021
Nadomešča:
SIST EN 62020:2000
SIST EN 62020:2000/A1:2006
Električni pribor - Nadzorovanje preostalega (difernečnega) toka (RCM) - 1. Del:
RCM za gospodinjske in podobne namene (IEC 62020-1:2020 + COR1:2020)

Electrical accessories - Residual current monitors (RCMs) - Part 1: RCMs for household

and similar uses (IEC 62020-1:2020 + COR1:2020)

Elektrisches Installationsmaterial - Differenzstrom-Überwachungsgeräte (RCMs) - Teil 1:

RCMs für Hausinstallationen und ähnliche Verwendungen (IEC 62020-1:2020 +
COR1:2020)

Petit appareillage électrique - Contrôleurs d'isolement à courant différentiel résiduel

(RCM) - Partie 1: RCM pour usages domestiques et analogues (IEC 62020-1:2020 +
COR1:2020)
Ta slovenski standard je istoveten z: EN IEC 62020-1:2021
ICS:
29.120.50 Varovalke in druga Fuses and other overcurrent
nadtokovna zaščita protection devices
SIST EN IEC 62020-1:2021 en,fr,de

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

---------------------- Page: 1 ----------------------
SIST EN IEC 62020-1:2021
---------------------- Page: 2 ----------------------
SIST EN IEC 62020-1:2021
EUROPEAN STANDARD EN IEC 62020-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2021
ICS 29.120.50 Supersedes EN 62020:1998 and all of its amendments
and corrigenda (if any)
English Version
Electrical accessories - Residual current monitors (RCMs) –
Part 1: RCMs for household and similar uses
(IEC 62020-1:2020 + COR1:2020)

Petit appareillage électrique - Contrôleurs d'isolement à Elektrisches Installationsmaterial - Differenzstrom-

courant différentiel résiduel (RCM) - Partie 1: RCM pour Überwachungsgeräte (RCMs) - Teil 1: RCMs für

usages domestiques et analogues Hausinstallationen und ähnliche Verwendungen
(IEC 62020-1:2020 + COR1:2020) (IEC 62020-1:2020 + COR1:2020)

This European Standard was approved by CENELEC on 2020-05-26. 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

© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 62020-1:2021 E
---------------------- Page: 3 ----------------------
SIST EN IEC 62020-1:2021
EN IEC 62020-1:2021 (E)
European foreword

The text of document 23E/1180/FDIS, future edition 1 of IEC 62020-1, prepared by SC 23E "Circuit-

breakers and similar equipment for household use" of IEC/TC 23 "Electrical accessories" was

submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN IEC 62020-1:2021.

The following dates are fixed:

• latest date by which the document has to be implemented at national (dop) 2021-10-16

level by publication of an identical national standard or by endorsement

• latest date by which the national standards conflicting with the (dow) 2024-04-16

document have to be withdrawn

This document supersedes EN 62020:1998 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 mandate given to CENELEC by the European Commission

and the European Free Trade Association, and supports essential requirements of EU Directive(s).

For the relationship with EU Directive(s) see informative Annexes ZZA and ZZB, which are an integral

part of this document.
Endorsement notice

The text of the International Standard IEC 62020-1:2020 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 60051 (series)
IEC 60364 (series) NOTE Harmonized as HD 60364 (series)
IEC 61000 (series) NOTE Harmonized as EN IEC 61000 (series)
IEC 61008-1:2010 NOTE Harmonized as EN 61008-1:2012 (modified)
IEC 61543 NOTE Harmonized as EN 61543
IEC 61557-8 NOTE Harmonized as EN 61557-8
ISO/IEC Guide 2:2004 NOTE Harmonized as EN 45020:2006 (not modified)
---------------------- Page: 4 ----------------------
SIST EN IEC 62020-1:2021
EN IEC 62020-1:2021 (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 60664-3 2017 Insulation coordination for equipment within EN 60664-3 2017
low-voltage systems
Part 3: Use of coating, potting or moulding
for protection against pollution
CISPR 14-1 2016 Electromagnetic compatibility - Requirements EN 55014-1 2017
for household appliances, electric tools and
similar apparatus - Part 1: Emission
IEC 60038 2009 IEC standard voltages EN 60038 2011

IEC 60068-2-30 2005 Environmental testing – Part 2-30: Tests – EN 60068-2-30 2005

Test Db: Damp heat, cyclic (12 + 12 hour
cycle)

IEC 60068-3-4 2001 Environmental testing – Part 3-4: Supporting EN 60068-3-4 2002

documentation and guidance – Damp heat
tests
IEC 60529 1989 Degrees of protection provided by EN 60529 1991
enclosures (IP Code)
A1 1999 A1 2000
A2 2013 A2 2013
IEC 60664-1 2007 Insulation coordination for equipment within EN 60664-1 2007
low-voltage systems – Part 1: Principles,
requirements and tests

IEC 60695-2-10 2013 Fire hazard testing – Part 2-10: Glowing/hot- EN 60695-2-10 2013

wire based test methods – Glow-wire
apparatus and common test procedure

IEC 60695-2-11 2014 Fire hazard testing – Part 2-11: Glowing/hot- EN 60695-2-11 2014

wire based test methods – Glow-wire
flammability test method for end-products
(GWEPT)

IEC 61000-4-2 2008 Electromagnetic compatibility (EMC) - Part 4- EN 61000-4-2 2009

2: Testing and measurement techniques –
Electrostatic discharge immunity test
---------------------- Page: 5 ----------------------
SIST EN IEC 62020-1:2021
EN IEC 62020-1:2021 (E)
Publication Year Title EN/HD Year

IEC 61000-4-3 2020 Electromagnetic compatibility (EMC) - Part 4- EN IEC 61000- 2020

3: Testing and measurement techniques – 4-3
Radiated, radio-frequency, electromagnetic
field immunity test

IEC 61000-4-4 2012 Electromagnetic compatibility (EMC) - Part 4- EN 61000-4-4 2012

4: Testing and measurement techniques -
Electrical fast transient/burst immunity test

IEC 61000-4-5 2014 Electromagnetic compatibility (EMC) - Part 4- EN 61000-4-5 2012

5: Testing and measurement techniques -
AMD1 2017 AMD1 2017
Surge immunity test

IEC 61000-4-6 2013 Electromagnetic compatibility (EMC) - Part 4- EN 61000-4-6 2014

6: Testing and measurement techniques -
Immunity to conducted disturbances, induced
by radio-frequency fields

IEC 61000-4-11 2020 Electromagnetic compatibility (EMC) - Part 4- EN IEC 61000- 2020

11: Testing and measurement techniques - 4-11
Voltage dips, short interruptions and voltage
variations immunity tests

IEC 61000-4-34 2005 Electromagnetic compatibility (EMC) - Part 4- EN 61000-4-34 2007

34 : Testing and measuring techniques -
AMD1 2009 AMD1 2009
Voltage dips, short interruptions and voltage
variations immunity tests for equipment with
input current more than 16 A per phase
IEC 61543 1995 Residual current-operated protective devices EN 61543 1995
(RCDs) for household and similar use –
AMD1 2004 AMD11 2003
Electromagnetic compatibility
AMD2 2005 AMD12 2005
AMD2 2006
IEC 62873-2 2016 Residual current operated circuit-breakers for
household and similar use – Part 2: Residual
current devices (RCDs) – Vocabulary
IEC 62873-3-1 2016 Residual current operated circuit-breakers for
household and similar use – Part 3-1 :
Particular requirements for RCDs with
screwless-type terminals for external copper
conductors
IEC 62873-3-2 2016 Residual current operated circuit-breakers for
household and similar use – Part 3-2 :
Particular requirements for RCDs with flat
quick-connect terminations
IEC 62873-3-3 2016 Residual current operated circuit-breakers for
household and similar use – Part 3-3 :
Specific requirements for RCDs with screw-
type terminals for external untreated
aluminium conductors and with aluminium
screw-type terminals for use with copper or
with aluminium conductors
CASRN 110-54-3 Chemical Abstracts Service Registry Number
---------------------- Page: 6 ----------------------
SIST EN IEC 62020-1:2021
EN IEC 62020-1:2021 (E)
Annex ZZA
(informative)
Relationship between this European standard and the essential
requirements of Directive 2014/30/EU [2014 OJ L96] aimed to be
covered

This European standard has been prepared under the European Commission standardisation request

C(2016) 7641 final of 30.11.2016 , ('M/552'), as regards harmonised standards in support of Directive

2014/30/EU relating to electromagnetic compatibility, to provide one voluntary means of conforming to

essential requirements of Directive 2014/30/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 electromagnetic

compatibility [2014 OJ L96].

Once this standard is cited in the Official Journal of the European Union under that Directive,

compliance with the normative clauses of this standard given in Table ZZA.1 confers, within the limits

of the scope of this standard, a presumption of conformity with the corresponding essential

requirements of that Directive, and associated EFTA regulations.
Table ZZA.1 — Correspondence between this European standard and the Essential
Requirements set out in Directive 2014/30/EU [2014 OJ L96]
Clause(s) / sub-clause(s)
Essential requirements of
Remarks / Notes
Directive 2014/30/EU
of this EN
Annex I. 1(a) (electromagnetic 8.18.3 When this standard in Clause 8.18.3
normatively references EN 55014-1
disturbances)
for emission requirements the
following applies:
Clause 7.1 of EN 55014-1
(Significance of a CISPR limit) shall
not be applied, if Clause 4 of EN
55014-1 (Limits of disturbances) is
applied for the purposes of the
presumption of conformity.
Clause 7.1 of EN 55014-1
(Significance of a CISPR limit) shall
not be applied, if Clause 6 of EN
55014-1 (Operating conditions) is
applied for the purposes of the
presumption of conformity
The following shall not be applied for
the purpose of presumption of
conformity:
Clause 7 of EN 55014-1
(Interpretation of CISPR radio
disturbance limits).

COMMISSION IMPLEMENTING DECISION C(2016) 7641 final of 30.11.2016 on a standardisation request to the European

Committee for Standardisation, to the European Committee for Electrotechnical Standardisation and to the European

Telecommunications Standards Institute as regards harmonised standards in support of Directive 2014/30/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

electromagnetic compatibility.
---------------------- Page: 7 ----------------------
SIST EN IEC 62020-1:2021
EN IEC 62020-1:2021 (E)
Clause(s) / sub-clause(s)
Essential requirements of
Remarks / Notes
Directive 2014/30/EU
of this EN
Annex I. 1(b) (electromagnetic 8.18.2
immunity) 9.22

WARNING 1: Presumption of conformity stays valid only as long as a reference to this European

standard is maintained in the list published in the Official Journal of the European Union. Users of this

standard should consult frequently the latest list published in the Official Journal of the European

Union.

WARNING 2: Other Union legislation may be applicable to the product(s) falling within the scope of

this standard.
---------------------- Page: 8 ----------------------
SIST EN IEC 62020-1:2021
EN IEC 62020-1:2021 (E)
Annex ZZB
(informative)
Relationship between this European standard and the safety
objectives of Directive 2014/35/EU [2014 OJ L96] aimed to be
covered

This European Standard has been prepared under a Commission’s standardization request relating to

harmonized standards in the field of the Low Voltage Directive, M/511, to provide one voluntary means

of conforming to safety objectives of Directive 2014/35/EU of the European Parliament and of the

Council of 26 February 2014 on the harmonization 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

[2014 OJ L96].

Once this standard is cited in the Official Journal of the European Union under that Directive,

compliance with the normative clauses of this standard given in Table ZZB.1 confers, within the limits

of the scope of this standard, a presumption of conformity with the corresponding essential

requirements of that Directive, and associated EFTA regulations.

Table ZZB.1 — Correspondence between this European standard and Article 3 of Directive

2014/35/EU [2014 OJ L153]
Clause(s) / sub-clause(s)
Safety Objectives of Directive
Remarks / Notes
2014/35/EU
of this EN
(1)(a) 1, 2, 3, 4, 5, 6 – 9.3
(1)(b) 8.1 – 9.4 and 9.5
(1)(c) 7 – 9.1 and 9.2, 9.1.3
(2) (a) 8.2 – 9.6, 8.5 – 9.9.1 to 9.9.3,
8.6 – 9.9.5, 8.13 – 9.9, 8.16 –
9.19, 8.7 – 9.10, 8.15 – 9.17,
8.20 –9.23, Annex A, 8.19 –
9.9.4
(2) (b) 8.4 – 9.8 and 9.10.2.2, 8.14 –
9.16, 8.7 – 9.10, 8.8 – 9.11,
Annex A
(2) (c) 8.1.4.3 and 8.1.4.4 – inspection,
8.12 – 9.15
(2) (d) 8.1.3 – 9.7, Annex B, 8.3 – 9.7
(3) (a) 8.9 – 9.12, 8.17 – 9.20, 8.17 –
9.21
(3) (b) 8.10 – 9.13, 8.11 – 9.14, 8.18 –
9.22, 8.15 – 9.17
(3) (c) 8.14 – 9.16, 8.8 – 9.11, 8.4 –
9.10.2.2

WARNING 1 — Presumption of conformity stays valid only as long as a reference to this European

standard is maintained in the list published in the Official Journal of the European Union. Users of this

standard should consult frequently the latest list published in the Official Journal of the European

Union.
---------------------- Page: 9 ----------------------
SIST EN IEC 62020-1:2021
EN IEC 62020-1:2021 (E)

WARNING 2 — Other Union legislation may be applicable to the product(s) falling within the scope of

this standard.
---------------------- Page: 10 ----------------------
SIST EN IEC 62020-1:2021
IEC 62020-1
Edition 1.0 2020-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electrical accessories – Residual current monitors (RCMs) –
Part 1: RCMs for household and similar uses
Petit appareillage électrique – Contrôleurs d'isolement à courant différentiel
résiduel (RCM) –
Partie 1: RCM pour usages domestiques et analogues
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.50 ISBN 978-2-8322-8145-1

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: 11 ----------------------
SIST EN IEC 62020-1:2021
– 2 – IEC 62020-1:2020 © IEC 2020
CONTENTS

FOREWORD ........................................................................................................................... 8

INTRODUCTION ................................................................................................................... 10

1 Scope ............................................................................................................................ 11

2 Normative references .................................................................................................... 12

3 Terms and definitions .................................................................................................... 13

4 Classification ................................................................................................................. 15

4.1 According to the method of operation .................................................................... 15

4.1.1 RCM functionally dependent on line voltage .................................................. 15

4.1.2 RCM functionally dependent on an energy source other than line

voltage .......................................................................................................... 15

4.2 According to the type of installation ...................................................................... 15

4.3 According to the number of current paths .............................................................. 15

4.4 According to the ability to adjust the residual operating current ............................. 15

4.5 According to the possibility of adjusting the time-delay ......................................... 15

4.6 According to the protection against external influences ......................................... 15

4.7 According to the method of mounting .................................................................... 15

4.8 According to the method of connection ................................................................. 15

4.9 According to the type of connection of the load conductors ................................... 15

4.9.1 RCM to which the monitored line is not directly connected ............................. 15

4.9.2 RCM to which the monitored line is directly connected................................... 16

4.10 According to fault indicating means ....................................................................... 16

4.11 According to ability to directionally discriminate between supply-side and

load-side residual currents .................................................................................... 16

4.12 According to the supply system ............................................................................. 16

4.12.1 RCM for use in AC supply systems ................................................................ 16

4.12.2 RCM for use in DC supply systems ................................................................ 16

4.13 According to the type of residual current monitored............................................... 16

4.14 According to the method of residual current detection ........................................... 16

5 Characteristics of RCMs ................................................................................................ 16

5.1 Summary of characteristics ................................................................................... 16

5.2 Rated quantities and other characteristics............................................................. 17

5.2.1 Rated voltage ................................................................................................ 17

5.2.2 Rated current (I ) .......................................................................................... 17

5.2.3 Rated residual operating current (I ) ........................................................... 17

5.2.4 Rated residual non-operating current (I ) .................................................. 18

Δno

5.2.5 Rated frequency ............................................................................................ 18

5.2.6 Operating characteristics ............................................................................... 18

5.3 Standard and preferred values .............................................................................. 18

5.3.1 Preferred values of rated voltage (U ) ........................................................... 18

5.3.2 Preferred values of rated current (I ) ............................................................. 19

5.3.3 Preferred values of rated residual operating current (I ) .............................. 19

5.3.4 Standard value of residual non-operating current (I ) ................................ 19

Δno
5.3.5 Standard minimum value of the non-operating overcurrent in the case of

single-phase load through an RCM ................................................................ 19

5.3.6 Preferred values of rated frequency ............................................................... 19

5.3.7 Standard and preferred values of the rated conditional short-circuit

current (I ) (only applicable to RCMs classified according to 4.9.2) ............. 19

---------------------- Page: 12 ----------------------
SIST EN IEC 62020-1:2021
IEC 62020-1:2020 © IEC 2020 – 3 –

5.3.8 Maximum actuating time (T ) .................................................................... 20

max

5.3.9 Minimum non-actuating time (T ) ............................................................... 20

min
5.4 Coordination with short-circuit protective devices (SCPDs) (only valid for

RCMs classified according to 4.9.2) ...................................................................... 20

5.4.1 General ......................................................................................................... 20

5.4.2 Rated conditional short-circuit current (I ) ................................................... 20

5.4.3 Rated conditional residual short-circuit current (I ) ...................................... 20

6 Marking and other product information ........................................................................... 20

7 Standard conditions for operation in service and for installation ..................................... 23

7.1 Standard conditions .............................................................................................. 23

7.2 Conditions of installation ....................................................................................... 24

8 Requirements for construction and operation ................................................................. 24

8.1 Mechanical design ................................................................................................ 24

8.1.1 General ......................................................................................................... 24

8.1.2 Features ........................................................................................................ 24

8.1.3 Clearances and creepage distances .............................................................. 25

8.1.4 Screws, current-carrying parts and connections ............................................. 26

8.1.5 Terminals for external conductors .................................................................. 27

8.2 Protection against electric shock ........................................................................... 29

8.3 Dielectric properties .............................................................................................. 30

8.4 Temperature rise .................................................................................................. 30

8.4.1 General ......................................................................................................... 30

8.4.2 Temperature rise limits .................................................................................. 30

8.4.3 Ambient air temperature ................................................................................ 31

8.5 Operating characteristic ........................................................................................ 31

8.6 Directional discrimination ...................................................................................... 31

8.7 Operational endurance .......................................................................................... 31

8.8 Performance at short-circuit currents .................................................................... 31

8.9 Resistance to mechanical impact .......................................................................... 31

8.10 Resistance to heat ................................................................................................ 32

8.11 Resistance to abnormal heat and to fire ................................................................ 32

8.12 Test device ........................................................................................................... 32

8.13 Correct operation of RCMs within the supply voltage range................................... 32

8.14 Behaviour of RCMs in case of overcurrents in the main circuit .............................. 32

8.15 Resistance of RCMs to unwanted initiating of an alarm due to current surges

caused by impulse voltages .................................................................................. 33

8.16 Behaviour of RCMs in case of earth fault currents comprising DC

components .......................................................................................................... 33

8.17 Reliability .............................................................................................................. 33

8.18 Electromagnetic compatibility (EMC) ..................................................................... 33

8.18.1 General ......................................................................................................... 33

8.18.2 Immunity requirements .................................................................................. 33

8.18.3 Emission requirements .................................................................................. 33

8.19 Connection of an external current transformer (CT) .............................................. 33

8.20 Response to temporary overvoltages on the LV side due to fault conditions

on the HV side ...................................................................................................... 33

9 Tests ............................................................................................................................. 34

9.1 General ................................................................................................................. 34

9.2 Test conditions ..................................................................................................... 35

---------------------- Page: 13 ----------------------
SIST EN IEC 62020-1:2021
– 4 – IEC 62020-1:2020 © IEC 2020

9.3 Test of indelibility of marking ................................................................................ 35

9.4 Test of reliability of screws, current-carrying parts and connections ...................... 36

9.5 Test of reliability of terminals for external conductors ............................................ 37

9.6 Verification of protection against electric shock ..................................................... 38

9.7 Test of dielectric properties ................................................................................... 39

9.7.1 Resistance to humidity................................................................................... 39

9.7.2 Insulation resistance of the main circuits of RCMs classified according

to 4.9.2 .......................................................................................................... 39

9.7.3 Dielectric strength of the main circuit of RCMs classified according to

4.9.2 .............................................................................................................. 40

9.7.4 Insulation resistance and dielectric strength of control and auxiliary

circuits ........................................................................................................... 41

9.7.5 Secondary circuit of detection transformers ................................................... 42

9.7.6 Capability of the RCM to withstand high DC voltages due to insulation

measurements ............................................................................................... 42

9.7.7 Verification of impulse withstand voltages ............................
...

SLOVENSKI STANDARD
oSIST prEN IEC 62020-1:2019
01-januar-2019
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SRGREQRXSRUDER

Electrical accessories - Residual current monitors for household and similar uses

(RCMs)
Elektrisches Installationsmaterial - Differenzstrom-Überwachungsgeräte für
Hausinstallationen und ähnliche Verwendungen (RCMs)

Petit appareillage électrique - Contrôleurs d'isolement à courant différentiel résiduel

(RCM) pour usages domestiques et analogues
Ta slovenski standard je istoveten z: prEN IEC 62020-1:2018
ICS:
29.120.50 9DURYDONHLQGUXJD Fuses and other overcurrent
PHGWRNRYQD]DãþLWD protection devices
oSIST prEN IEC 62020-1:2019 en,fr,de

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

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oSIST prEN IEC 62020-1:2019
23E/1081/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 62020-1 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2018-11-16 2019-02-08
SUPERSEDES DOCUMENTS:
23E/1025/CD,23E/1053/CC
IEC SC 23E : CIRCUIT-BREAKERS AND SIMILAR EQUIPMENT FOR HOUSEHOLD USE
SECRETARIAT: SECRETARY:
Italy Mr Giovanni Cassinelli
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:
TC 22,TC 61,TC 64,TC 69,TC 82,TC 88,TC 105,TC
114,TC 117,SC 121A
Other TC/SCs are requested to indicate their interest, if
any, in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY

SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING

Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft
for Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.

This document is still under study and subject to change. It should not be used for reference purposes.

Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of

which they are aware and to provide supporting documentation.
TITLE:

Electrical accessories - Residual current monitors for household and similar uses (RCMs)

PROPOSED STABILITY DATE: 2022
NOTE FROM TC/SC OFFICERS:

This document is the revision of IEC 62020, but, according to the decision agreed with SC121A (See

23E/1070/INF), has been renumbered IEC 62020-1 (see also documents 23E/1071/Q and

23E/1078/RQ).

Therefore the new IEC 62020-1 when published will replace IEC 62020: 1998 + AMD 1: 2003.

Copyright © 2018 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to

download this electronic file, to make a copy and to print out the content for the sole purpose of preparing National

Committee positions. You may not copy or "mirror" the file or printed version of the document, or any part of it, for

any other purpose without permission in writing from IEC.
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1 CONTENTS

3 FOREWORD ........................................................................................................................... 8

4 Introduction ........................................................................................................................... 10

5 1 Scope ............................................................................................................................ 10

6 2 Normative references ..................................................................................................... 10

7 3 Terms and definitions .................................................................................................... 11

8 3.1 Definitions relating to currents flowing from live parts to earth ................................ 12

9 3.2 Definitions relating to the energization of an RCM .................................................. 12

10 3.3 Definitions relating to the operation and to the functions of residual current

11 monitors ................................................................................................................ 13

12 3.4 Definitions relating to values and ranges of energizing quantities ........................... 15

13 3.5 Definitions relating to values and ranges of influencing quantities .......................... 16

14 3.6 Definitions relating to terminals ............................................................................. 16

15 3.7 Conditions of operation ......................................................................................... 17

16 3.8 Test ...................................................................................................................... 18

17 4 Classification ................................................................................................................. 18

18 4.1 According to the method of operation .................................................................... 18

19 4.1.1 RCM functionally dependent on line voltage ................................................... 18

20 4.1.2 RCM functionally dependent on an energy source other than line voltage ........ 18

21 4.2 According to the type of installation ....................................................................... 18

22 4.3 According to the number of current paths .............................................................. 18

23 4.4 According to the ability to adjust the residual operating current .............................. 18

24 4.5 According to the possibility of adjusting the time-delay ........................................... 18

25 4.6 According to the protection against external influences .......................................... 18

26 4.7 According to the method of mounting ..................................................................... 18

27 4.8 According to the method of connection .................................................................. 18

28 4.9 According to the type of connection of the load conductors .................................... 19

29 4.9.1 RCM to which the monitored line is not directly connected .............................. 19

30 4.9.2 RCM to which the monitored line is directly connected .................................... 19

31 4.10 According to fault indicating means ....................................................................... 19

32 4.11 According to ability to directionally discriminate between supply side and load

33 side residual currents ............................................................................................ 19

34 4.12 According to the supply system ............................................................................. 19

35 4.12.1 RCM for use in AC supply system .................................................................. 19

36 4.12.2 RCM for use in DC supply system .................................................................. 19

37 4.13 According to the type of residual current monitored ................................................ 19

38 4.14 According to the method of residual current detection ............................................ 19

39 5 Characteristics of RCMs ................................................................................................ 19

40 5.1 Summary of characteristics ................................................................................... 19

41 5.2 Rated quantities and other characteristics ............................................................. 20

42 5.2.1 Rated voltage ................................................................................................ 20

43 5.2.2 Rated current (I ) .......................................................................................... 20

44 5.2.3 Rated residual operating current (I ) ............................................................ 20

45 5.2.4 Rated residual non-operating current (I ) ................................................... 21

∆no

46 5.2.5 Rated frequency............................................................................................. 21

47 5.2.6 Operating characteristics ............................................................................... 21

48 5.2.7 Insulation coordination including clearances and creepage distances ............. 21

49 5.3 Standard and preferred values .............................................................................. 22

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50 5.3.1 Preferred values of rated voltage (U ) ............................................................ 22

51 5.3.2 Preferred values of rated current (I ) ............................................................. 22

52 5.3.3 Preferred values of rated residual operating current (I ) ............................... 22

53 5.3.4 Standard value of residual non-operating current (I ) .................................. 22

∆no
54 5.3.5 Standard minimum value of non-operating overcurrent in case of a

55 multiphase balanced load through a multipath RCM (see 3.4.2.1) ................... 22

56 5.3.6 Standard minimum value of the non-operating overcurrent through an

57 RCM (see 3.4.2.2) .......................................................................................... 22

58 5.3.7 Preferred values of rated frequency ................................................................ 22

59 5.3.8 Standard and preferred values of the rated conditional short-circuit

60 current (I ) (only applicable to RCMs classified according to 4.9.2) ............... 23

61 5.3.9 Maximum actuating time (T ) .................................................................... 23

max

62 5.3.10 Minimum non-actuating time (T ) ................................................................. 23

min

63 5.4 Coordination with short-circuit protective devices (SCPDs) (only valid for

64 RCMs classified according to 4.9.2) ....................................................................... 23

65 5.4.1 General ......................................................................................................... 23

66 5.4.2 Rated conditional short-circuit current (I ) .................................................... 23

67 5.4.3 Rated conditional residual short-circuit current (I ) ....................................... 23

68 6 Marking and other product information ........................................................................... 24

69 7 Standard conditions for operation in service and for installation ...................................... 25

70 7.1 Standard conditions............................................................................................... 25

71 7.2 Conditions of installation ....................................................................................... 26

72 8 Requirements for construction and operation.................................................................. 26

73 8.1 Mechanical design................................................................................................. 26

74 8.1.1 General ......................................................................................................... 26

75 8.1.2 Features ........................................................................................................ 26

76 8.1.3 Clearances and creepage distances (see also Annex B) ................................. 27

77 8.1.4 Screws, current-carrying parts and connections .............................................. 28

78 8.1.5 Terminals for external conductors .................................................................. 28

79 8.2 Protection against electric shock ........................................................................... 30

80 8.3 Dielectric properties .............................................................................................. 31

81 8.4 Temperature rise ................................................................................................... 31

82 8.4.1 Temperature rise limits .................................................................................. 31

83 8.4.2 Ambient air temperature ................................................................................. 32

84 8.5 Operating characteristic ........................................................................................ 32

85 8.6 Directional discrimination ...................................................................................... 32

86 8.7 Operational endurance .......................................................................................... 32

87 8.8 Performance at short-circuit currents ..................................................................... 32

88 8.9 Resistance to mechanical impact........................................................................... 32

89 8.10 Resistance to heat ................................................................................................ 33

90 8.11 Resistance to abnormal heat and to fire ................................................................. 33

91 8.12 Test device ........................................................................................................... 33

92 8.13 Correct operation of RCMs within the supply voltage range .................................... 33

93 8.14 Behaviour of RCMs in case of overcurrents in the main circuit ............................... 33

94 8.15 Resistance of RCMs to unwanted tripping due to current surges caused by

95 impulse voltages ................................................................................................... 34

96 8.16 Behaviour of RCMs in case of earth fault currents comprising DC components

97 ............................................................................................................................. 34

98 8.17 Reliability .............................................................................................................. 34

99 8.18 Electromagnetic compatibility (based on IEC 61543) .............................................. 34

100 8.18.1 Low frequency electromagnetic phenomena ................................................... 34

101 8.18.2 High frequency immunity ................................................................................ 34

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102 8.18.3 Electrostatic discharges ................................................................................. 34

103 8.18.4 Electromagnetic emission .............................................................................. 34

104 8.19 Connection of an external current transformer (CT) ............................................... 34

105 8.20 Response to temporary overvoltages on the LV-side due to fault conditions on

106 the HV-side ........................................................................................................... 35

107 9 Tests ............................................................................................................................. 35

108 9.1 General ................................................................................................................. 35

109 9.2 Test conditions ...................................................................................................... 36

110 9.3 Test of indelibility of marking ................................................................................. 36

111 9.4 Test of reliability of screws, current-carrying parts and connections ....................... 37

112 9.5 Test of reliability of terminals for external conductors ............................................. 38

113 9.6 Verification of protection against electric shock...................................................... 39

114 9.7 Test of dielectric properties ................................................................................... 40

115 9.7.1 Resistance to humidity ................................................................................... 40

116 9.7.2 Insulation resistance of the RCM .................................................................... 40

117 9.7.3 Dielectric strength of the RCM ........................................................................ 41

118 9.7.4 Insulation resistance and dielectric strength of auxiliary circuits ...................... 42

119 9.7.5 Secondary circuit of detection transformers .................................................... 42

120 9.7.6 Capability of the RCM to withstand high DC voltages due to insulation

121 measurements ............................................................................................... 43

122 9.7.7 Verification of impulse withstand voltages ...................................................... 43

123 9.8 Test of temperature rise ........................................................................................ 45

124 9.8.1 Ambient air temperature ................................................................................. 45

125 9.8.2 Test procedure .............................................................................................. 45

126 9.8.3 Measurement of the temperature rise of parts ................................................ 45

127 9.8.4 Temperature rise of a part .............................................................................. 46

128 9.9 Verification of the operating characteristics............................................................ 46

129 9.9.1 Test circuit ..................................................................................................... 46

130 9.9.2 Off-load tests with residual sinusoidal alternating currents at the

131 reference temperature of 20 °C ± 2 °C ........................................................... 46

132 9.9.3 Verification of the correct operation with load at the reference

133 temperature ................................................................................................... 47

134 9.9.4 Verification of the connection and the function of an external current

135 transformer (CT) ............................................................................................ 47

136 9.9.5 Verification of directional discrimination for RCMs classified according to

137 4.11 ............................................................................................................... 48

138 9.10 Verification of operational endurance ..................................................................... 48

139 9.10.1 General ......................................................................................................... 48

140 9.10.2 Test procedure .............................................................................................. 49

141 9.11 Verification of short-circuit withstand capability ...................................................... 49

142 9.11.1 List of the short-circuit tests ........................................................................... 49

143 9.11.2 Short-circuit tests ........................................................................................... 49

144 9.12 Verification of resistance to mechanical impact ...................................................... 54

145 9.13 Test of resistance to heat ...................................................................................... 56

146 9.14 Test of resistance to abnormal heat and to fire ...................................................... 57

147 9.15 Verification of the operation of the test device at the limits of rated voltage ............ 58

148 9.16 Verification of limiting values of the non-operating current under overcurrent

149 conditions ............................................................................................................. 58

150 9.16.1 Verification of the limiting value of overcurrent in case of a load through

151 an RCM with two current paths ....................................................................... 58

152 9.16.2 Verification of the limiting value of overcurrent in case of a single phase

153 load through a three-pole or four-pole RCM .................................................... 58

154 9.16.3 Verification of the limiting value of overcurrent in case of a single phase

155 load through an RCM with an external detecting device (transformer) ............. 59

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156 9.17 Verification of resistance against unwanted operation due to current surges

157 caused by impulse voltages ................................................................................... 59

158 9.18 Void ...................................................................................................................... 60

159 9.19 Additional verification of the correct operation at residual currents with DC

160 components .......................................................................................................... 60

161 9.19.1 General ......................................................................................................... 60

162 9.19.2 Verification of the correct operation for RCM Type A, Type F and Type B ....... 62

163 9.19.3 Verification of correct operation for RCM Type F and Type B .......................... 63

164 9.19.4 Verification of correct operation for RCM Type B ............................................ 64

165 9.20 Verification of reliability ......................................................................................... 66

166 9.20.1 Climatic test ................................................................................................... 67

167 9.20.2 Test with temperature of 40 °C ....................................................................... 68

168 9.21 Verification of ageing of electronic components ..................................................... 68

169 9.22 Verification of EMC requirements .......................................................................... 69

170 9.23 Response of the RCM to temporary overvoltages on the LV-side, due to fault

171 conditions on the HV-side ...................................................................................... 71

172 Annex A (normative) Test sequence and number of samples to be submitted for

173 verification of conformity to the standard ...................................................................... 100

174 A.1 Test sequences ........................................................................................................... 100

175 A.2 Number of samples to be submitted for full test procedure ........................................... 101

176 A.3 Number of samples to be submitted for simplified test procedures in case of

177 submitting simultaneously a range of RCMs of the same fundamental design ............... 101

178 Annex B (normative) Determination of clearances and creepage distances ......................... 104

179 Bibliography ........................................................................................................................ 107

180

181 Figure 1 – Standard test finger (9.6) ...................................................................................... 72

182 Figure 2 – Test circuit for the verification of the operating characteristics for RCMs for

183 use in TT and TN-systems .................................................................................................... 73

184 Figure 3 – Test circuit for the verification of directional discrimination in IT systems for

185 RCMs classified according to 4.11 ......................................................................................... 74

186 Figure 4 – Test circuit for the verification of the correct operation of RCMs in the case

187 of residual pulsating direct currents ....................................................................................... 75

188 Figure 5 – Test circuit for the verification of the correct operation of RCMs in the case

189 of residual pulsating direct currents superimposed by smooth direct current of 0,006 A .......... 76

190 Explanation of letter symbols used in Figures 6 to 8............................................................... 77

191 Figure 6 – Test circuit for the verification of the co-ordination with a SCPD of an RCM

192 with two current paths (9.11) ................................................................................................. 78

193 Figure 7 – Test circuit for the verification of the co-ordination with a SCPD of an RCM

194 with three current paths in a three-phase circuit (9.11) ........................................................... 79

195 Figure 8 – Test circuit for the verification of the co-ordination with a SCPD of an RCM

196 with four current paths on a three-phase circuit with neutral (9.11) ......................................... 80

197 Figure 9 – Test apparatus for the verification of the minimum I t and I values to be

198 withstood by the RCM (9.11.2.1 a)) ........................................................................................ 81

199 Figure 10 – Mechanical impact test apparatus (9.12.1) .......................................................... 82

200 Figure 11 – Striking element for pendulum impact test apparatus (9.12.1) .............................. 82

201 Figure 12 – Mounting support for sample for mechanical impact test (9.12.1) ......................... 83

202 Figure 13 – Example of mounting an unenclosed RCM for mechanical impact test

203 (9.12.1) ................................................................................................................................. 84

204 Figure 14 – Example of mounting of panel mounting type RCM for the mechanical

205 impact test (9.12.1) ............................................................................................................... 85

206 Figure 15 – Application of force for mechanical test of rail-mounted RCM (9.12.2) ................. 86

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207 Figure 16 – Ball-pressure test apparatus (9.13.2) .................................................................. 86

208 Figure 17 – Test circuit for the verification of the limiting value of overcurrent in the case

209 of single phase load .............................................................................................................. 87

210 Figure 18 – Current ring wave 0,5 µs/100 kHz ....................................................................... 88

211 Figure 19 – Test circuit for the ring-wave test at RCMs .......................................................... 88

212 Figure 20 – Stabilizing period for reliability test (9.20.1.3) ...................................................... 89

213 Figure 21 – Reliability test cycle (9.20.1.3) ............................................................................ 90

214 Figure 22 – Example for test circuit for verification of ageing of electronic components

215 (9.21) .................................................................................................................................... 91

216 Figure 23 – RCMs without monitored lines connected ............................................................ 92

217 Figure 24 – RCMs with monitored lines connected ................................................................. 93

218 Figure 25 – Example of a test circuit for the verification of correct operation in case of

219 residual sinusoidal alternating currents composed of multi-frequency components

220 resulting from single-phase supplied speed motor control equipment ..................................... 94

221 Figure 26 – Test circuit for the verification of correct operation in case of residual

222 sinusoidal alternating current up to 1 000 Hz ......................................................................... 95

223 Figure 27 – Test circuit for 2-,3- and 4-pole RCM Type B to verify the correct operation

224 in case of residual pulsating direct currents which may result from rectifying circuits

225 supplied from two phases ...................................................................................................... 96

226 Figure 28 – Test circuit for 3- and 4-pole RCM Type B to verify the correct operation in

227 case of residual pulsating direct currents which may result from rectifying circuits

228 supplied from three phases ................................................................................................... 97

229 Figure 29 – Test circuit for 2-, 3- and 4-pole RCM Type B to verify the correct operation

230 in case of a residual smooth direct current ............................................................................ 98

231 Figure 30 – Diagrammatic representation for glow-wire test ................................................... 99

232 Figure B.1, Figure B.2, Figure B.3, Figure B.4, Figure B.5, Figure B.6 – Illustrations of

233 the application of creepage distances .................................................................................. 105

234 Figure B.7, Figure B.8,
...

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