Junction boxes for photovoltaic modules - Safety requirements and tests

IEC 62790:2020 is available as IEC 62790:2020 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 62790:2020 describes safety requirements, constructional requirements and tests for junction boxes up to 1 500 V DC for use on photovoltaic modules in accordance with class II of IEC 61140:2016. This document applies also to enclosures mounted on PV-modules containing electronic circuits for converting, controlling, monitoring or similar operations. Additional requirements concerning the relevant operations are applied under consideration of the environmental conditions of the PV-modules. This document does not apply to the electronic circuits of these devices, for which other IEC standards apply. This second edition cancels and replaces the first edition published in 2014. This edition includes the following significant technical changes with respect to the previous edition: - Modifications in normative references and terms and definitions; - Improvement of declaration of categories for junction boxes in 4.1; - Clarification for ambient temperature in 4.1; - Addition of requirement to provide information concerning RTE/RTI or TI in 4.2; - Reference to IEC 62930 instead of EN 50618 in 4.6; - Addition of "Functional insulation" in Table 1; - Addition of "Distance through cemented joints" in Table 3; - Correction of procedure of process to categorize material groups (deletion of PTI) in; - Requirement for approval of RTE/RTI or TI for insulation parts in 4.16.1 and 4.16.2; - Change of requirements concerning electrochemical potential in 4.17.2; - Clarification for IP-test in; - Addition of test voltage for cemented joints in 5.3.6 and 5.3.16; - Addition of detailled description on how to prepare the test sample for the thermal cycle test in; - New test procedure for bypass diode thermal test (5.3.18) in accordance with MQT 18.1 of IEC 61215-2:2016; - New test procedure for reverse overload current test in 5.3.23; - New Figure 1 for thermal cycle test.

Anschlussdosen für Photovoltaik-Module - Sicherheitsanforderungen und Prüfungen

Boîtes de jonction pour modules photovoltaïques - Exigences de sécurité et essais

IEC 62790:2020 est disponible sous forme de IEC 62790:2020 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.L’IEC 62790:2020 décrit les exigences de sécurité, les exigences de construction et les essais relatifs aux boîtes de jonction jusqu’à 1 500 V en courant continu utilisées sur des modules photovoltaïques conformes à la classe II de l’IEC 61140:2016. Le présent document s’applique également aux enveloppes montées sur des modules photovoltaïques comportant des circuits électroniques pour la conversion, le contrôle, la surveillance ou opérations similaires. Des exigences supplémentaires concernant les opérations correspondantes sont appliquées en considérant les conditions d’environnement des modules photovoltaïques. Le présent document ne s’applique pas aux circuits électroniques de ces dispositifs pour lesquels d’autres normes IEC s’appliquent. Cette deuxième édition annule et remplace la première édition parue en 2014. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: - Modifications des références normatives et des termes et définitions; - Amélioration de la catégorisation des boîtes de jonction en 4.1; - Clarification de la température ambiante en 4.1; - Ajout de l'exigence prévoyant de fournir les indices RTE/RTI ou IT en 4.2; - Référence à l’IEC 62930 à la place de la référence à l’EN 50618 en 4.6; - Ajout de "l'isolation fonctionnelle" dans le Tableau 1; - Ajout de "ligne de fuite entre les bords du joint scellé" dans le Tableau 3; - Correction de la procédure du processus de catégorisation des groupes de matériaux (suppression de l’ITC) au; - Exigence d'approbation des indices RTE/RTI ou IT pour les parties isolantes en 4.16.1 et 4.16.2; - Modification des exigences concernant le potentiel électrochimique en 4.17.2; - Clarification des essais de vérification du code IP au; - Ajout de la tension d'essai pour les joints scellés en 5.3.6 et 5.3.16; - Ajout de la description détaillée sur la façon de préparer les éprouvettes pour l'essai de cycle thermique en; - Nouvelle procédure d'essai pour l'essai thermique la diode de dérivation (5.3.18) conformément au MQT 18.1 de l’IEC 61215-2: 2016; - Nouvelle procédure d'essai pour l'essai de courant de surcharge inverse au 5.3.23; - Nouvelle Figure 1 pour l'essai de cycle thermique.

Priključnice fotonapetostnih modulov - Varnostne zahteve in preskušanje

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SIST EN IEC 62790:2020
SIST EN 62790:2015
Priključnice fotonapetostnih modulov - Varnostne zahteve in preskušanje
Junction boxes for photovoltaic modules - Safety requirements and tests
Anschlussdosen für Photovoltaik-Module - Sicherheitsanforderungen und Prüfungen
Boîtes de jonction pour modules photovoltaïques - Exigences de sécurité et essais
Ta slovenski standard je istoveten z: EN IEC 62790:2020
27.160 Sončna energija Solar energy engineering
SIST EN IEC 62790:2020 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 62790:2020

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SIST EN IEC 62790:2020



September 2020
ICS 27.160 Supersedes EN 62790:2015 and all of its amendments
and corrigenda (if any)
English Version
Junction boxes for photovoltaic modules - Safety requirements
and tests
(IEC 62790:2020)
Boîtes de jonction pour modules photovoltaïques - Anschlussdosen für Photovoltaik-Module -
Exigences de sécurité et essais Sicherheitsanforderungen und Prüfungen
(IEC 62790:2020) (IEC 62790:2020)
This European Standard was approved by CENELEC on 2020-08-19. 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
© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN IEC 62790:2020 E

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SIST EN IEC 62790:2020
EN IEC 62790:2020 (E)
European foreword
The text of document 82/1719/FDIS, future edition 2 of IEC 62790, prepared by IEC/TC 82 "Solar
photovoltaic energy systems" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN IEC 62790:2020.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2021-05-19
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2023-08-19
document have to be withdrawn
This document supersedes EN 62790:2015 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

Endorsement notice
The text of the International Standard IEC 62790:2020 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
IEC 60112 NOTE Harmonized as EN 60112
IEC 60228 NOTE Harmonized as EN 60228
IEC 60512-1 NOTE Harmonized as EN IEC 60512-1
IEC 60664-3 NOTE Harmonized as EN 60664-3
IEC 60998-2-1 NOTE Harmonized as EN 60998-2-1
IEC 60998-2-2 NOTE Harmonized as EN 60998-2-2
IEC 61730-2 NOTE Harmonized as EN IEC 61730-2


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SIST EN IEC 62790:2020
EN IEC 62790:2020 (E)
Annex ZA

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)
NOTE 1  Where an International Publication has been modified by common modifi

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