Salt mist corrosion testing of photovoltaic (PV) modules

IEC 61701:2011 describes test sequences useful to determine the resistance of different PV modules to corrosion from salt mist containing Cl- (NaCl, MgCl2, etc.). All tests included in the sequences, except the bypass diode functionality test, are fully described in IEC 61215, IEC 61646, IEC 62108, IEC 61730-2 and IEC 60068-2-52. This Standard can be applied to both flat plate PV modules and concentrator PV modules and assemblies. Salt mist test is based on IEC 60068-2-52 rather than IEC 60068-2-11 as in edition 1 since the former standard is much more widely used in the electronic component field. According to this change the new edition 2 includes a cycling testing sequence that combines in each cycle a salt fog exposure followed by humidity storage under controlled temperature and relative humidity conditions. This testing sequence is more suitable to reflect the corrosion processes that happen in PV modules subjected to permanent or temporary corrosive atmospheres.

Salznebel-Korrosionsprüfung von photovoltaischen (PV-)Modulen

Essai de corrosion au brouillard salin des modules photovoltaïques (PV)

La CEI 61701:2011 décrit des séquences d'essai pour déterminer la résistance de différents modules photovoltaïques à la corrosion due au brouillard salin contenant du Cl- (NaCl, MgCl2, etc.). Tous les essais inclus dans les séquences, à l'exception de l'essai de fonctionnalité des diodes de dérivation, sont décrits de façon détaillée dans les normes CEI 61215, CEI 61646, CEI 62108, CEI 61730-2 et CEI 60068-2-52. La présente Norme peut être appliquée à des modules photovoltaïques plans et à des modules et ensembles photovoltaïques à concentration. L'essai au brouillard salin est basé sur la CEI 60068-2-52 plutôt que sur la CEI 60068-2-11 comme dans l'édition 1 puisque l'ancienne norme est plus largement utilisée dans le domaine des composants électroniques. Conformément à ce changement, la nouvelle édition 2 inclut une séquence d'essai cyclique qui combine dans chaque cycle une exposition au brouillard salin suivie d'un stockage en milieu humide dans des conditions de température et d'humidité relative contrôlées. Cette séquence d'essai reflète mieux les processus de corrosion rencontrés par les modules photovoltaïques soumis à des atmosphères corrosives permanentes ou temporaires (NaCl).

Korozijsko preskušanje fotonapetostnih (PV) modulov v slani megli (IEC 61701:2011)

Fotonapetostni sistemi (PV) so električne naprave, namenjene za uporabo pri stalni izpostavljenosti zunanjim pogojem med njihovo celotno življenjsko dobo. Močno korozivno vlažno okolje, kot je morsko okolje, bi lahko sčasoma povzročilo poslabšanje stanja nekaterih sestavnih delov fotonapetostnih modulov (korozija kovinskih delov, poslabšanje lastnosti nekaterih nekovinskih materialov – kot so zaščitne prevleke in plastika – z vezavo soli itd.), zaradi česar bi nastale trajne poškodbe, ki bi lahko ogrozile delovanje. Občasno korozivno okolje je prisotno tudi na območjih, kjer se sol pozimi uporablja za taljenje ledu na cestah. V tem standardu so opisana zaporedja preskusov, ki se uporabljajo za ugotavljanje odpornosti različnih fotonapetostnih modulov proti koroziji zaradi slane megle, ki vsebuje Cl- (NaCl, MgCl2 itd.). Vsi preskusi, vključeni v zaporedja, razen preskusa funkcionalnosti premostitvenih diod, so v celoti opisani v standardih IEC 61215, IEC 61646, IEC 62108, IEC 61730-2 in IEC 60068-2-52. V ta standard so zajeti, da se zagotovi način za ugotavljanje morebitnih okvar, ki nastanejo v fotonapetostnih modulih pri delovanju v vlažnem okolju s koncentracijo raztopljene soli (NaCl). Odvisno od posebne vrste ozračja, ki mu je izpostavljen modul pri dejanskem delovanju, se lahko uporabi več zahtevnostnih stopenj preskusov, kot je opredeljeno v standardu IEC 60068-2-52. Stopnja zahtevnosti (1) naj bi se na primer uporabljala za fotonapetostne module, ki se uporabljajo v morskem okolju ali v bližini morja. Stopnje zahtevnosti od (3) do (6) naj bi se uporabljale za fotonapetostne module, ki se uporabljajo na območju, kjer bi lahko prišlo do mešanja slanega in suhega zraka, na primer na območjih, kjer se sol uporablja za taljenje ledu. Stopnja zahtevnosti (2) ni primerna za fotonapetostne module, ker so preskusni pogoji prešibki (ta stopnja zahtevnosti je bila prvotno namenjena za izdelke, ki so občasno izpostavljeni korozivnemu okolju in so običajno zaščiteni z ohišjem), zato naj se pri izvajanju tega standarda ne bi uporabljala. Ta standard se lahko uporablja za ploščate in koncentratorske fotonapetostne module in sestave.

General Information

Status
Published
Publication Date
15-Mar-2012
Current Stage
6060 - Document made available
Due Date
16-Mar-2012
Completion Date
16-Mar-2012

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SLOVENSKI STANDARD
SIST EN 61701:2012
01-maj-2012
1DGRPHãþD
SIST EN 61701:2001
Korozijsko preskušanje fotonapetostnih (PV) modulov v slani megli (IEC
61701:2011)
Salt mist corrosion testing of photovoltaic (PV) modules
Salznebel-Korrosionsprüfung von photovoltaischen (PV-) Modulen
Essai de corrosion au brouillard salin des modules photovoltaïques (PV)
Ta slovenski standard je istoveten z: EN 61701:2012
ICS:
27.160 6RQþQDHQHUJLMD Solar energy engineering
SIST EN 61701:2012 en

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

---------------------- Page: 1 ----------------------
SIST EN 61701:2012
---------------------- Page: 2 ----------------------
SIST EN 61701:2012
EUROPEAN STANDARD
EN 61701
NORME EUROPÉENNE
March 2012
EUROPÄISCHE NORM
ICS 27.160 Supersedes EN 61701:1999
English version
Salt mist corrosion testing of photovoltaic (PV) modules
(IEC 61701:2011)
Essai de corrosion au brouillard salin des Salznebel-Korrosionsprüfung von
modules photovoltaïques (PV) photovoltaischen (PV-)Modulen
(CEI 61701:2011) (IEC 61701:2011)

This European Standard was approved by CENELEC on 2012-01-19. 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, Romania, Slovakia, Slovenia,

Spain, Sweden, Switzerland, Turkey 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

© 2012 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 61701:2012 E
---------------------- Page: 3 ----------------------
SIST EN 61701:2012
EN 61701:2012 - 2 -
Foreword

The text of document 82/668/FDIS, future edition 2 of IEC 61701, prepared by IEC TC 82, "Solar

photovoltaic energy systems" was submitted to the IEC-CENELEC parallel vote and approved by

CENELEC as EN 61701:2012.
The following dates are fixed:
(dop) 2012-10-19
• latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2015-01-19
• latest date by which the national
standards conflicting with the
document have to be withdrawn
This document supersedes EN 61701:1999.

EN 61701:2012 includes the following significant technical changes with respect to EN 61701:1999:

— The scope has been updated to better reflect the applicability of the standard.

— Salt mist test is based on EN 60068-2-52 rather than EN 60068-2-11 as in EN 61701:1999 since

the former standard is much more widely used in the electronic component field. According to this

change EN 61701:2012 includes a cycling testing sequence that combines in each cycle a salt

fog exposure followed by humidity storage under controlled temperature and relative humidity

conditions. This testing sequence is more suitable to reflect the corrosion processes that happen

in PV modules subjected to permanent or temporary corrosive atmospheres (NaCl). In

EN 61701:1999 only a salt fog exposure was considered.

— Additional tests have also been included to verify the effect of the salt mist test not only in the PV

module output but also in some of its components.

— Different testing sequences are considered depending on the PV module technology involved:

crystalline silicon, thin-film and concentrator photovoltaic (CPV) modules.
— A test report clause has also been included.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent

rights.
Endorsement notice

The text of the International Standard IEC 61701:2011 was approved by CENELEC as a European

Standard without any modification.
---------------------- Page: 4 ----------------------
SIST EN 61701:2012
- 3 - EN 61701:2012
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. 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.
Publication Year Title EN/HD Year
IEC 60068-2-52 - Environmental testing - EN 60068-2-52 -
Part 2: Tests - Test Kb: Salt mist, cyclic
(sodium chloride solution)
IEC 61215 2005 Crystalline silicon terrestrial photovoltaic (PV) EN 61215 2005
modules - Design qualification and type
approval
IEC 61646 2008 Thin-film terrestrial photovoltaic EN 61646 2008
(PV) modules - Design qualification and type
approval

IEC 61730-2 (mod) 2004 Photovoltaic (PV) module safety qualification - EN 61730-2 2007

Part 2: Requirements for construction
IEC 62108 2007 Concentrator Photovoltaic (CPV) modules EN 62108 2008
and assemblies - Design qualification and
type approval
ISO/IEC 17025 - General requirements for the competence EN ISO/IEC 17025 -
of testing and calibration laboratories
---------------------- Page: 5 ----------------------
SIST EN 61701:2012
---------------------- Page: 6 ----------------------
SIST EN 61701:2012
IEC 61701
Edition 2.0 2011-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Salt mist corrosion testing of photovoltaic (PV) modules
Essai de corrosion au brouillard salin des modules photovoltaïques (PV)
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX N
ICS 27.160 ISBN 978-2-88912-840-2
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 7 ----------------------
SIST EN 61701:2012
– 2 – 61701 © IEC:2011
CONTENTS

FOREWORD ........................................................................................................................... 3

1 Scope and object .............................................................................................................. 5

2 Normative references ....................................................................................................... 5

3 Samples ........................................................................................................................... 6

4 Test procedures ............................................................................................................... 6

4.1 General ................................................................................................................... 6

4.2 Bypass diode functionality test ................................................................................ 6

4.2.1 Purpose ....................................................................................................... 6

4.2.2 Apparatus .................................................................................................... 6

4.2.3 Procedure .................................................................................................... 7

4.2.4 Requirements .............................................................................................. 7

5 Preconditioning ................................................................................................................ 7

6 Initial measurements ........................................................................................................ 7

7 Salt mist test procedure .................................................................................................... 8

8 Cleaning and recovery ...................................................................................................... 8

9 Final measurements ......................................................................................................... 9

10 Requirements ................................................................................................................. 10

10.1 General ................................................................................................................. 10

10.2 Crystalline silicon .................................................................................................. 10

10.3 Thin-film technologies ........................................................................................... 10

10.4 Concentrator photovoltaic (CPV) modules ............................................................. 10

11 Test report...................................................................................................................... 11

Figure 1 – Salt mist corrosion testing sequence for crystalline silicon PV modules ................ 12

Figure 2 – Salt mist corrosion testing sequence for thin-film PV modules .............................. 13

Figure 3 – Salt mist corrosion testing sequence for concentrator photovoltaic (CPV)

modules ................................................................................................................................ 14

---------------------- Page: 8 ----------------------
SIST EN 61701:2012
61701 © IEC:2011 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SALT MIST CORROSION TESTING OF PHOTOVOLTAIC (PV) MODULES
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote

international co-operation on all questions concerning standardization in the electrical and electronic fields. To

this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,

Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC

Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested

in the subject dealt with may participate in this preparatory work. International, governmental and non-

governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely

with the International Organization for Standardization (ISO) in accordance with conditions determined by

agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence

between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in

the latter.

5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC

Publications.

8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 61701 has been prepared by IEC technical committee 82: Solar

photovoltaic energy systems.

This second edition cancels and replaces the first edition issued in 1995. This edition

constitutes a technical revision.
The main technical changes with respect to the previous edition are as follows:
The scope has been updated to better reflect the applicability of the Standard.

Salt mist test is based on IEC 60068-2-52 rather than IEC 60068-2-11 as in edition 1 since

the former Standard is much more widely used in the electronic component field. According to

this change the new edition 2 includes a cycling testing sequence that combines in each cycle

a salt fog exposure followed by humidity storage under controlled temperature and relative

humidity conditions. This testing sequence is more suitable to reflect the corrosion processes

that happen in PV modules subjected to permanent or temporary corrosive atmospheres

(NaCl). In edition 1 only a salt fog exposure was considered.
---------------------- Page: 9 ----------------------
SIST EN 61701:2012
– 4 – 61701 © IEC:2011

Additional tests have also been included to verify the effect of the salt mist test not only in the

PV module output but also in some of its components.

Different testing sequences are considered depending on the PV module technology involved:

crystalline silicon, thin-film and concentrator photovoltaic (CPV) modules.
A test report clause has also been included.
The text of this standard is based on the following documents:
FDIS Report on voting
82/667/FDIS 82/681/RVD

Full information on the voting for the approval of this standard can be found in the report on

voting indicated in the above table.

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

The committee has decided that the contents of this publication will remain unchanged until

the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data

related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------------- Page: 10 ----------------------
SIST EN 61701:2012
61701 © IEC:2011 – 5 –
SALT MIST CORROSION TESTING OF PHOTOVOLTAIC (PV) MODULES
1 Scope and object

Photovoltaic (PV) modules are electrical devices intended for continuous outdoor exposure

during their lifetime. Highly corrosive wet atmospheres, such as marine environments, could

eventually degrade some of the PV module components (corrosion of metallic parts,

deterioration of the properties of some non-metallic materials - such as protective coatings

and plastics - by assimilation of salts, etc.) causing permanent damages that could impair

their functioning. Temporary corrosive atmospheres are also present in places where salt is

used in winter periods to melt ice formations on streets and roads.

This Standard describes test sequences useful to determine the resistance of different PV

modules to corrosion from salt mist containing Cl (NaCl, MgCl , etc.). All tests included in the

sequences, except the bypass diode functionality test, are fully described in IEC 61215,

IEC 61646, IEC 62108, IEC 61730-2 and IEC 60068-2-52. They are combined in this Standard

to provide means to evaluate possible faults caused in PV modules when operating under wet

atmospheres having high concentration of dissolved salt (NaCl). Depending on the specific

nature of the surrounding atmosphere to which the module is exposed in real operation

several testing severities can be applied, as defined in IEC 60068-2-52. For example severity

(1) is intended to be used for PV modules used in a marine environment, or in close proximity

to the sea. Severities (3) to (6) are intended for PV modules operating in locations where

there could be a change between salt-laden and dry atmospheres, for examples in places

where salt is used to melt ice formations. Severity (2) is not suitable for PV modules as

testing conditions are too weak (this severity is originally intended for products exposed to

corrosive environments from time to time that are normally protected by an enclosure) and

should be avoided when applying this Standard.

This Standard can be applied to both flat plate PV modules and concentrator PV modules and

assemblies.
2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and

are indispensable for its application. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any
amendments) applies.

IEC 60068-2-52, Environmental testing – Part 2-52: Tests – Test Kb: Salt mist, cyclic (sodium

chloride solution)

IEC 61215:2005, Crystalline silicon terrestrial photovoltaic (PV) modules – Design

qualification and type approval

IEC 61646:2008, Thin-film terrestrial photovoltaic (PV) modules – Design qualification and

type approval

IEC 61730-2:2004, Photovoltaic (PV) module safety qualification – Part 2: Requirements for

testing
IEC 62108:2007, Concentrator photovoltaic (CPV) modules and assemblies – Design
qualification and type approval
---------------------- Page: 11 ----------------------
SIST EN 61701:2012
– 6 – 61701 © IEC:2011

ISO/IEC 17025, General requirements for the competence of testing and calibration

laboratories
3 Samples

Three identical samples of the model of PV module or assembly of interest shall be subjected

to any of the testing sequences included in Figures 1, 2 or 3, depending on the PV technology

considered, namely crystalline silicon, thin-film or concentrator photovoltaic (CPV)

respectively. As the figures ind
...

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