EN IEC 63112:2021

Photovoltaic (PV) arrays - Earth fault protection equipment - Safety and safety-related functionality

EN IEC 63112:2021

Name:EN IEC 63112:2021   Standard name:Photovoltaic (PV) arrays - Earth fault protection equipment - Safety and safety-related functionality
Standard number:EN IEC 63112:2021   language:English language
Release Date:12-Aug-2021   technical committee:CLC/TC 82 - Solar photovoltaic energy systems
Drafting committee:IEC/TC 82 - IEC_TC_82   ICS number:27.160 - Solar energy engineering

SLOVENSKI STANDARD
01-november-2021
Varnost, funkcionalnost in klasifikacija fotonapetostne opreme za preprečevanje
zemeljskega stika (PV EFP)
Safety, functionality and classification of Photovoltaic Earth Fault Protection (PV EFP)
equipment
Ta slovenski standard je istoveten z: EN IEC 63112:2021
ICS:
27.160 Sončna energija Solar energy engineering
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 63112

NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2021
ICS 27.160
English Version
Photovoltaic (PV) arrays - Earth fault protection equipment -
Safety and safety-related functionality
(IEC 63112:2021)
Groupes photovoltaïques (PV) - Matériel de protection Sicherheit, Funktionalität und Klassifizierung von
contre les défauts à la terre - Sécurité et fonctionnalités photovoltaischen Erdschluß-Schutzeinrichtungen (PV EFP)
relatives à la sécurité (IEC 63112:2021)
(IEC 63112:2021)
This European Standard was approved by CENELEC on 2021-07-27. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
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 63112:2021 E
European foreword
The text of document 82/1885/FDIS, future edition 1 of IEC 63112, prepared by IEC/TC 82 “Solar
photovoltaic energy systems” was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN IEC 63112:2021.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2022–04–27
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2024–07–27
document have to be withdrawn
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 63112:2021 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 60947-3:2020 NOTE Harmonized as EN IEC 60947-3:2021 (not modified)
IEC 61215-2 NOTE Harmonized as EN IEC 61215-2
IEC 62109-2:2011 NOTE Harmonized as EN 62109-2:2011 (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 60269-6 - Low-voltage fuses - Part 6: Supplementary EN 60269-6 -
requirements for fuse-links for the
protection of solar photovoltaic energy
systems
IEC 60417 - Graphical symbols for use on equipment - - -
12-month subscription to regularly updated
online database comprising all graphical
symbols published in IEC 60417
IEC 60664-1 - Insulation coordination for equipment EN IEC 60664-1 -
within low-voltage supply systems - Part 1:
Principles, requirements and tests
IEC 60730-1 (mod) 2013 Automatic electrical controls - Part 1: EN 60730-1 2016
General requirements
+ A1 2015  + A1 2019
+ A2 2020
IEC 60947-2 2016 Low-voltage switchgear and controlgear - EN 60947-2 2017
Part 2: Circuit-breakers
+ A1 2019  + A1 2020
IEC 61008-1 (mod) 2010 Residual current operated circuit-breakers EN 61008-1 2012
without integral overcurrent protection for
household and similar uses (RCCBs) - Part
1: General rules
+ A1 (mod) 2012  + A1 2014
+ A2 (mod) 2013  + A2 2014
- -  + A11 2015
- -  + A12 2017
IEC 61439-1 - Low-voltage switchgear and controlgear EN IEC 61439-1 -
assemblies - Part 1: General rules
IEC 61557-8 - Electrical safety in low voltage distribution EN 61557-8 -
systems up to 1 000 V a.c. and 1 500 V
d.c. - Equipment for testing, measuring or
monitoring of protective measures - Part 8:
Insulation monitoring devices for IT
systems
IEC 62109-1 2010 Safety of power converters for use in EN 62109-1 2010
photovoltaic power systems - Part 1:
General requirements
IEC 62109-3 2020 Safety of power converters for use in - -
photovoltaic power systems - Part 3:
Particular requirements for electronic
devices in combination with photovoltaic
elements
ISO 3864 series Graphical symbols - Safety colours and - -
safety signs
IEC/TS 61836 - Solar photovoltaic energy systems - - -
Terms, definitions and symbols
IEC/TS 63053 - General requirements for residual current - -
operated protective devices for DC system

IEC 63112
Edition 1.0 2021-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Photovoltaic (PV) arrays – Earth fault protection equipment – Safety and safety-

related functionality
Groupes photovoltaïques (PV) – Matériel de protection contre les défauts à la

terre – Sécurité et fonctionnalités relatives à la sécurité

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 27.160 ISBN 978-2-8322-9872-5

– 2 – IEC 63112:2021 © IEC 2021
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 9
2 Normative references . 9
3 Terms, definitions, symbols and abbreviated terms . 10
4 Requirements relating PV-EFP to system topology . 12
4.1 General . 12
4.2 PV-EFP functions for different system topologies . 16
4.3 PV-EFPE control over host system operation . 18
4.3.1 General . 18
4.3.2 Types of PV-EFPE requiring host system control . 18
4.3.3 Methods of control of the host system operation . 18
4.4 Disconnection under fault conditions . 19
4.4.1 General . 19
4.4.2 Disconnecting means . 19
4.4.3 High impedance connections . 19
4.4.4 Indirect disconnection . 19
4.5 Systems with more than one sub-array (informative) . 20
4.5.1 General . 20
4.5.2 Isolated sub-arrays . 20
4.5.3 Non-isolated sub-arrays . 20
5 PV array to earth insulation monitoring . 20
5.1 General . 20
5.2 Array insulation monitoring requirements . 21
5.3 Array insulation fault response requirements. 21
5.4 Provisions for reset . 22
5.5 Insulation monitoring function adjustability . 22
6 PV array residual or earth current monitoring. 22
6.1 General . 22
6.2 Required PV-EFP current monitoring functions . 22
6.3 Shock hazard current monitoring . 23
6.3.1 General . 23
6.3.2 Limits and response. 23
6.3.3 Provisions for reset . 23
6.3.4 Shock hazard current monitoring – adjustability . 24
6.3.5 Fault tolerance of shock hazard current monitoring . 24
6.4 Fire hazard (continuous) current monitoring by electronic means . 24
6.4.1 Overview . 24
6.4.2 General . 24
6.4.3 Settings and response . 24
6.4.4 Provisions for reset . 25
6.4.5 Fire hazard current monitoring function adjustability . 25
6.4.6 Fault tolerance of fire hazard current monitoring by electronic means . 25
6.5 Fire hazard current monitoring by an overcurrent protective device in the
functional earthing conductor . 25
6.5.1 Overview . 25

IEC 63112:2021 © IEC 2021 – 3 –
6.5.2 General . 25
6.5.3 Ratings . 26
6.5.4 Response . 26
6.5.5 Provisions for reset . 26
6.5.6 Overcurrent protective device adjustability and replacement . 26
7 Construction . 27
7.1 General . 27
7.2 Environmental considerations . 27
8 PV-EFP Fault Indication . 28
8.1 General . 28
8.2 Integral fault
...

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