EN 62109-2:2011

Safety of power converters for use in photovoltaic power systems - Part 2: Particular requirements for inverters

IEC 62109-2:2011 covers the particular safety requirements relevant to d.c. to a.c. inverter products as well as products that have or perform inverter functions in addition to other functions, where the inverter is intended for use in photovoltaic power systems. Inverters covered by this standard may be grid-interactive, stand-alone, or multiple mode inverters, may be supplied by single or multiple photovoltaic modules grouped in various array configurations, and may be intended for use in conjunction with batteries or other forms of energy storage. This standard must be used jointly with IEC 62109-1.

Sicherheit von Leistungsumrichtern zur Anwendung in photovoltaischen Energiesystemen - Teil 2: Besondere Anforderungen an Wechselrichter

Sécurité des convertisseurs de puissance utilisés dans les systèmes photovoltaïques - Partie 2: Exigences particulières pour les onduleurs

La CEI 62109-2:2011 couvre les exigences de sécurité particulières concernant les onduleurs transformant un courant continu en courant alternatif, ainsi que les produits possédant ou exécutant des fonctions d'onduleur en plus d'autres fonctions, lorsque l'onduleur est destiné à être utilisé dans des systèmes photovoltaïques. Les onduleurs couverts par la présente norme peuvent être des onduleurs couplés au réseau, autonomes ou multimodes, ils peuvent être alimentés par des modules photovoltaïques simples ou multiples regroupés en diverses configurations de générateurs et ils peuvent être destinés à être utilisés conjointement avec des batteries ou avec d'autres formes de stockage d'énergie. Cette norme doit être lue conjointement avec la CEI 62109-1.

Varnost močnostnih pretvornikov, ki se uporabljajo v fotonapetostnih sistemih - 2. del: Posebne zahteve za razsmernike (IEC 62109-2:2011)

Ta 2. del IEC 62109 zajema posebne varnostne zahteve, pomembne za razsmernike med enosmernim in izmeničnim tokom, ter proizvode, ki imajo ali izvajajo poleg drugih funkcij tudi razsmerniško funkcijo, pri katerih je razsmernik namenjen uporabi v fotonapetostnih sistemih. Razsmerniki, ki jih zajema ta standard, so lahko omrežno interaktivni, samostojni ali večnačinovni razsmerniki, lahko so dobavljeni v enojnih ali večkratnih fotonapetostnih modulih, združenih v različne konfiguracije nizov, in se lahko uporabljajo v povezavi z baterijami ali drugimi oblikami shranjevanja energije. Razsmerniki z več funkcijami ali načini se presojajo glede na vse ustrezne zahteve za vsako funkcijo oziroma vsak način. Ta standard ne obravnava zahtev za omrežno povezovanje pri omrežno interaktivnih razsmernikih.

General Information

• Status: Published
• Publication Date: 29-Sep-2011
• Withdrawal Date: 27-Jul-2014
• ICS: 27.160 - Solar energy engineering
• Technical Committee: CLC/TC 82 - Solar photovoltaic energy systems
• Drafting Committee: IEC/TC 82 - IEC_TC_82
• Parallel Committee: IEC/TC 82 - IEC_TC_82
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 30-Sep-2011
• Completion Date: 30-Sep-2011
• Directive: 2006/95/EC - Directive 2006/95/EC of the European Parliament and of the Council of 12 December 2006 on the harmonisation of the laws of Member States relating to electrical equipment designed for use within certain voltage limits (codified version)
• Directive: 2014/35/EU - Directive 2014/35/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 the making available on the market of electrical equipment designed for use within certain voltage limits
• Directive: 2014/53/EU - Directive 2014/53/EU of The European Parliament and of the Council of 16 April 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of radio equipment and repealing Directive 1999/5/EC
• Ref Project: SIST EN 62109-2:2011 - Safety of power converters for use in photovoltaic power systems - Part 2: Particular requirements for inverters (IEC 62109-2:2011)

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2011
9DUQRVWPRþQRVWQLKSUHWYRUQLNRYNLVHXSRUDEOMDMRYIRWRQDSHWRVWQLKVLVWHPLK
GHO3RVHEQH]DKWHYH]DUD]VPHUQLNH,(&
Safety of power converters for use in photovoltaic power systems - Part 2: Particular
requirements for inverters (IEC 62109-2:2011)
Sicherheit von Leistungsumrichtern zur Anwendung in photovoltaischen
Energiesystemen - Teil 2: Besondere Anforderungen an Wechselrichter (IEC 62109-
2:2011)
Sécurité des convertisseurs de puissance utilisés dans les systèmes photovoltaïques -
Partie 2: Exigences particulières pour les onduleurs (CEI 62109-2:2011)
Ta slovenski standard je istoveten z: EN 62109-2:2011
ICS:
27.160 6RQþQDHQHUJLMD Solar energy engineering
29.200 8VPHUQLNL3UHWYRUQLNL Rectifiers. Convertors.
6WDELOL]LUDQRHOHNWULþQR Stabilized power supply
QDSDMDQMH
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 62109-2
NORME EUROPÉENNE
September 2011
EUROPÄISCHE NORM
ICS 27.160
English version
Safety of power converters for use in photovoltaic power systems -
Part 2: Particular requirements for inverters
(IEC 62109-2:2011)
Sécurité des convertisseurs de puissance Sicherheit von Leistungsumrichtern zur
utilisés dans les systèmes Anwendung in photovoltaischen
photovoltaïques - Energiesystemen -
Partie 2: Exigences particulières pour les Teil 2: Besondere Anforderungen an
onduleurs Wechselrichter
(CEI 62109-2:2011) (IEC 62109-2:2011)

This European Standard was approved by CENELEC on 2011-07-28. 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, Romania, Slovakia, Slovenia,
Spain, Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 62109-2:2011 E
Foreword
The text of document 82/636/FDIS, future edition 1 of IEC 62109-2, prepared by IEC TC 82, "Solar
photovoltaic energy systems", was submitted to the IEC-CENELEC parallel vote and was approved by
CENELEC as EN 62109-2 on 2011-07-28.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent
rights.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
(dop) 2012-04-28
national standard or by endorsement
– latest date by which the national standards conflicting
(dow) 2014-07-28
with the EN have to be withdrawn
The requirements in this Part 2 are to be used with the requirements in Part 1, and supplement or modify
clauses in Part 1. When a particular clause or subclause of Part 1 is not mentioned in this Part 2, that
clause of Part 1 applies. When this Part 2 contains clauses that add to, modify, or replace clauses in
Part 1, the relevant text of Part 1 is to be applied with the required changes.
Subclauses, figures and tables additional to those in Part 1 are numbered in continuation of the sequence
existing in Part 1.
All references to “Part 1” in this Part 2 shall be taken as dated references to EN 62109-1:2010.
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 62109-2:2011 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 60364-7-712 NOTE  Harmonized as HD 60364-7-712.
IEC 61008-1 NOTE  Harmonized as EN 61008-1.
IEC 61727 NOTE  Harmonized as EN 61727.
IEC 61730-1 NOTE  Harmonized as EN 61730-1.
IEC 62116 NOTE  Harmonized as EN 62116.
__________
- 3 - EN 62109-2:2011
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application 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  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Addition to EN 62109-1:2010:
Publication Year Title EN/HD Year

IEC 62109-1 2010 Safety of power converters for use in EN 62109-1 2010
photovoltaic power systems -
Part 1: General requirements
IEC 62109-2 ®
Edition 1.0 2011-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Safety of power converters for use in photovoltaic power systems –
Part 2: Particular requirements for inverters

Sécurité des convertisseurs de puissance utilisés dans les systèmes
photovoltaïques –
Partie 2: Exigences particulières pour les onduleurs

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX V
ICS 27.160 ISBN 978-2-88912-491-6

– 2 – 62109-2  IEC:2011
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope and object . 7
1.1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 General testing requirements. 9
4.4 Testing in single fault condition . 9
4.4.4 Single fault conditions to be applied . 9
4.4.4.15 Fault-tolerance of protection for grid-interactive inverters . 9
4.4.4.16 Stand-alone inverters – Load transfer test . 12
4.4.4.17 Cooling system failure – Blanketing test . 12
4.7 Electrical ratings tests . 12
4.7.3 Measurement requirements for AC output ports for stand-alone
inverters . 13
4.7.4 Stand-alone Inverter AC output voltage and frequency . 13
4.7.4.1 General . 13
4.7.4.2 Steady state output voltage at nominal DC input . 13
4.7.4.3 Steady state output voltage across the DC input range . 13
4.7.4.4 Load step response of the output voltage at nominal DC
input . 13
4.7.4.5 Steady state output frequency . 13
4.7.5 Stand-alone inverter output voltage waveform . 14
4.7.5.1 General . 14
4.7.5.2 Sinusoidal output voltage waveform requirements . 14
4.7.5.3 Non-sinusoidal output waveform requirements . 14
4.7.5.4 Information requirements for non-sinusoidal waveforms . 14
4.7.5.5 Output voltage waveform requirements for inverters for
dedicated loads . 15
4.8 Additional tests for grid-interactive inverters . 15
4.8.1 General requirements regarding inverter isolation and array
grounding . 15
4.8.2 Array insulation resistance detection for inverters for ungrounded and
functionally grounded arrays . 17
4.8.2.1 Array insulation resistance detection for inverters for
ungrounded arrays . 17
4.8.2.2 Array insulation resistance detection for inverters for
functionally grounded arrays . 17
4.8.3 Array residual current detection . 18
4.8.3.1 General . 18
4.8.3.2 30 mA touch current type test for isolated inverters . 19
4.8.3.3 Fire hazard residual current type test for isolated inverters . 19
4.8.3.4 Protection by application of RCD’s . 19
4.8.3.5 Protection by residual current monitoring . 19
4.8.3.6 Systems located in closed electrical operating areas . 22
5 Marking and documentation . 22
5.1 Marking . 23

62109-2  IEC:2011 – 3 –
5.1.4 Equipment ratings. 23
5.2 Warning markings . 23
5.2.2 Content for warning markings . 23
5.2.2.6 Inverters for closed electrical operating areas . 24
5.3 Documentation . 24
5.3.2 Information related to installation . 24
5.3.2.1 Ratings . 24
5.3.2.2 Grid-interactive inverter setpoints . 25
5.3.2.3 Transformers and isolation . 25
5.3.2.4 Transformers required but not provided. 25
5.3.2.5 PV modules for non-isolated inverters . 25
5.3.2.6 Non-sinusoidal output waveform information . 25
5.3.2.7 Systems located in closed electrical operating areas . 26
5.3.2.8 Stand-alone inverter output circuit bonding . 26
5.3.2.9 Protection by application of RCD’s . 26
5.3.2.10 Remote indication of faults . 26
5.3.2.11 External array insulation resistance measurement and
response . 26
5.3.2.12 Array functional grounding information . 26
5.3.2.13 Stand-alone inverters for dedicated loads . 27
5.3.2.14 Identification of firmware version(s) . 27
6 Environmental requirements and conditions. 27
7 Protection against electric shock and energy hazards . 27
7.3 Protection against electric shock . 27
7.3.10 Additional requirements for stand-alone inverters . 27
7.3.11 Functionally grounded arrays . 28
8 Protection against mechanical hazards . 28
9 Protection against fire hazards . 28
9.3 Short-circuit and overcurrent protection . 28
9.3.4 Inverter backfeed current onto the array . 28
10 Protection against sonic pressure hazards.
...