EN IEC 62446-2:2020

Photovoltaic (PV) systems - Requirements for testing, documentation and maintenance - Part 2: Grid connected systems - Maintenance of PV systems

IEC 62446-2:2020 describes basic preventive, corrective, and performance related maintenance requirements and recommendations for grid-connected PV systems. The maintenance procedures cover: - Basic maintenance of the system components and connections for reliability, safety and fire prevention - Measures for corrective maintenance and troubleshooting - Worker safety This document also addresses maintenance activities for maximizing anticipated performance such as module cleaning and upkeep of vegetation. Special considerations unique to rooftop or ground-mounted systems are summarized.

Photovoltaik(PV)-Systeme - Anforderungen an Prüfung, Dokumentation und Instandhaltung - Teil 2: Netzgekoppelte Systeme - Instandhaltung von PV-Systemen

Systèmes photovoltaïques (PV) - Exigences pour les essais, la documentation et la maintenance - Partie 2: Systèmes connectés au réseau électrique - Maintenance des systèmes PV

l'IEC 62446-2:2020 décrit les exigences et recommandations de base en matière de maintenance préventive, corrective et de performances concernant les systèmes PV connectés au réseau. Les procédures de maintenance couvrent: - La maintenance de base des composants et connexions du système pour la fiabilité, la sécurité et la prévention contre les incendies; - Les mesures de maintenance corrective et de dépannage - La sécurité des travailleurs Le présent document porte également sur les activités de maintenance permettant d'optimiser les performances prévues (nettoyage du module et entretien de la végétation, par exemple). Les considérations particulières concernant exclusivement les systèmes sur toiture et les systèmes placés au sol sont récapitulées.

Fotonapetostni sistemi - Zahteve za preskušanje, dokumentiranje in vzdrževanje - 2. del: Sistemi, priključeni na omrežje - Vzdrževanje fotonapetostnih sistemov

General Information

• Status: Published
• Publication Date: 14-May-2020
• ICS: 27.160 - Solar energy engineering
• Technical Committee: CLC/TC 82 - Solar photovoltaic energy systems
• Drafting Committee: IEC/TC 82 - IEC_TC_82
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 15-May-2020
• Completion Date: 15-May-2020
• Ref Project: SIST EN IEC 62446-2:2020 - Photovoltaic (PV) systems - Requirements for testing, documentation and maintenance - Part 2: Grid connected systems - Maintenance of PV systems

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2020
Fotonapetostni sistemi - Zahteve za preskušanje, dokumentiranje in vzdrževanje -
2. del: Sistemi, priključeni na omrežje - Vzdrževanje fotonapetostnih sistemov
Photovoltaic (PV) systems - Requirements for testing, documentation and maintenance -
Part 2: Grid connected systems - Maintenance of PV systems
Ta slovenski standard je istoveten z: EN IEC 62446-2:2020
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 62446-2

NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2020
ICS 27.160
English Version
Photovoltaic (PV) systems - Requirements for testing,
documentation and maintenance - Part 2: Grid connected
systems - Maintenance of PV systems
(IEC 62446-2:2020)
Systèmes photovoltaïques (PV) - Exigences pour les Photovoltaik(PV)-Systeme - Anforderungen an Prüfung,
essais, la documentation et la maintenance - Partie 2: Dokumentation und Instandhaltung - Teil 2: Netzgekoppelte
Systèmes connectés au réseau électrique - Maintenance Systeme - Instandhaltung von PV-Systemen
des systèmes PV (IEC 62446-2:2020)
(IEC 62446-2:2020)
This European Standard was approved by CENELEC on 2020-04-22. 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 62446-2:2020 E

European foreword
The text of document 82/1656/FDIS, future edition 1 of IEC 62446-2, prepared by IEC/TC 82 "Solar
photovoltaic energy systems" was submitted to the IEC-CENELEC parallel vote and approved by
CENELEC as EN IEC 62446-2:2020.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2021-01-22
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2023-04-22
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.

Endorsement notice
The text of the International Standard IEC 62446-2:2020 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 60300-3-3 NOTE Harmonized as EN 60300-3-3
IEC 60891 NOTE Harmonized as EN 60891
IEC 60904-1 NOTE Harmonized as EN 60904-1

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.
Clause 2 of IEC 62446-1:2016 is applicable, except as follows:
Add the following references:
Publication Year Title EN/HD Year
IEC/TS 61724-2 - Photovoltaic system performance - Part 2: - -
Capacity evaluation method
IEC/TS 61724-3 - Photovoltaic system performance - Part 3: - -
Energy evaluation method
IEC/TS 61836 2016 Solar photovoltaic energy systems - Terms, - -
definitions and symbols
IEC 62020 - Electrical accessories - Residual current - -
monitors for household and similar uses
(RCMs)
IEC 62446-1 2016 Photovoltaic (PV) systems - Requirements EN 62446-1 2016
for testing, documentation and maintenance
- Part 1: Grid connected systems -
Documentation, commissioning tests and
inspection
IEC/TS 62446-3 2017 Photovoltaic (PV) systems - Requirements - -
for testing, documentation and maintenance
- Part 3: Photovoltaic modules and plants -
Outdoor infrared thermography
IEC 62548 - Photovoltaic (PV) arrays - Design - -
requirements
IEC 62446-2 ®
Edition 1.0 2020-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Photovoltaic (PV) systems – Requirements for testing, documentation and

maintenance –
Part 2: Grid connected systems – Maintenance of PV systems

Systèmes photovoltaïques (PV) – Exigences pour les essais, la documentation

et la maintenance –
Partie 2: Systèmes connectés au réseau électrique – Maintenance des systèmes

PV
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 27.160 ISBN 978-2-8322-7906-9

– 2 – IEC 62446-2:2020 © IEC 2020
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 8
3 Terms and definitions . 8
4 System documentation requirements . 10
4.1 General . 10
4.8 Operation and maintenance information . 10
4.10 Performance benchmarking . 11
4.11 Documentation of records . 11
5 Verification . 11
6 Test procedures – Category 1 . 11
7 Test procedures – Category 2 . 11
8 Test procedures – Additional tests . 11
9 Verification reports . 12
10 Maintenance protocols . 12
10.1 General . 12
10.2 Verification intervals and triggers . 12
10.3 Other considerations for determining specific verification intervals . 17
11 Verification tasks . 17
11.1 General . 17
11.2 General site visual inspection . 17
11.2.1 All systems . 17
11.2.2 Rooftop systems . 18
11.2.3 Ground-mount systems . 18
11.3 Component inspection and safety related maintenance . 18
11.3.1 Inverter and main electrical equipment pad . 18
11.3.2 Combiner boxes, disconnects and isolators . 18
11.3.3 Modules . 20
11.3.4 PV connectors . 20
11.3.5 Wiring . 21
11.3.6 Mounting system . 21
11.3.7 Conduits and cable trays . 22
11.3.8 Weather station . 22
11.4 Performance related maintenance . 22
11.4.1 General . 22
11.4.2 Wiring connection resistance . 22
11.4.3 Shade evaluation . 22
11.4.4 Module string or wiring harness testing . 22
11.4.5 Vegetation management . 24
11.4.6 Soiling and array cleaning . 24
12 Troubleshooting and corrective maintenance . 26
12.1 General . 26
12.2 Shutdown of equipment in response to hazardous failures . 26
12.3 Troubleshooting non-hazardous failures. 26

IEC 62446-2:2020 © IEC 2020 – 3 –
12.4 Troubleshooting incident or event-triggered issues . 26
12.5 Diagnosing performance related issues . 27
13 Additional procedures . 28
13.1 General . 28
13.2 Safety procedures . 28
13.2.1 General . 28
13.2.2 Safe operation of switch disconnectors . 28
13.3 Isolation procedures . 28
13.3.1 Emergency shutdown. 28
13.3.2 Non-emergency shutdown . 29
13.4 Inspection and preventive maintenance procedures . 30
13.4.1 Inverter manufacturer specific procedures . 30
13.4.2 Tracker manufacturer specific procedures . 31
13.4.3 Data acquisition system specific procedures . 31
13.5 Electrical test procedures . 32
13.5.1 Earth fault testing . 32
13.5.2 Fuse tests . 34
13.5.3 Bypass diode tests .
...