SIST EN 62446:2010

SLOVENSKI STANDARD
SIST EN 62446:2010
01-februar-2010
)RWRQDSHWRVWQLVLVWHPLSULNOMXþHQLQDRPUHåMH0LQLPDOQH]DKWHYH]DVLVWHPVNR
GRNXPHQWDFLMRSUHY]HPQHSUHVNXVHLQQDG]RU,(&
Grid connected PV systems - Minimum requirements for system documentation,
commissioning tests, and inspection requirements
Netzgekoppelte Photovoltaik-Systeme – Mindestanforderungen an
Systemdokumentation, Inbetriebnahmeprüfung und Prüfanforderungen
Systèmes PV connectés au réseau électrique - Exigences minimales pour la
documentation du système, les essais de mise en service et exigences d'examen
Ta slovenski standard je istoveten z: EN 62446:2009
ICS:
27.160 6RQþQDHQHUJLMD Solar energy engineering
SIST EN 62446:2010 en,fr
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST EN 62446:2010

---------------------- Page: 2 ----------------------

SIST EN 62446:2010

EUROPEAN STANDARD
EN 62446

NORME EUROPÉENNE
December 2009
EUROPÄISCHE NORM

ICS 27.160


English version


Grid connected photovoltaic systems -
Minimum requirements for system documentation,
commissioning tests and inspection
(IEC 62446:2009)


Systèmes photovoltaïques  Netzgekoppelte Photovoltaik-Systeme -
connectés au réseau électrique - Mindestanforderungen
Exigences minimales an Systemdokumentation,
pour la documentation du système, Inbetriebnahmeprüfung
les essais de mise en service et l’examen und Prüfanforderungen
(CEI 62446:2009) (IEC 62446:2009)




This European Standard was approved by CENELEC on 2009-10-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, 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

Central Secretariat: Avenue Marnix 17, B - 1000 Brussels


© 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 62446:2009 E

---------------------- Page: 3 ----------------------

SIST EN 62446:2010
EN 62446:2009 - 2 -
Foreword
The text of document 82/558A/FDIS, future edition 1 of IEC 62446, prepared by IEC TC 82, Solar
photovoltaic energy systems, was submitted to the IEC-CENELEC parallel vote and was approved by
CENELEC as EN 62446 on 2009-10-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2010-07-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2012-10-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 62446:2009 was approved by CENELEC as a European
Standard without any modification.
__________

---------------------- Page: 4 ----------------------

SIST EN 62446:2010
- 3 - EN 62446:2009
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.

Publication Year Title EN/HD Year

IEC 60364 (mod) Series Low-voltage electrical installations HD 60364 Series


1) 2)
IEC 60364-6 (mod) - Low voltage electrical installations - HD 60364-6 2007
Part 6: Verification


IEC 60364-7-712 2002 Electrical installations of buildings - HD 60364-7-712 2005
Part 7-712: Requirements for special + corr. April 2006
installations or locations - Solar photovoltaic
(PV) power supply systems


IEC/TR 60755 2008 General requirements for residual current - -
operated protective devices


IEC 61557 Series Electrical safety in low voltage distribution EN 61557 Series
systems up to 1 000 V a.c. and 1 500 V d.c. -
Equipment for testing, measuring or monitoring
of protective measures


1) 2)
IEC 61730-1 (mod) - Photovoltaic (PV) module safety qualification - EN 61730-1 2007
Part 1: Requirements for construction





1)
Undated reference.
2)
Valid edition at date of issue.

---------------------- Page: 5 ----------------------

SIST EN 62446:2010

---------------------- Page: 6 ----------------------

SIST EN 62446:2010
IEC 62446
®
Edition 1.0 2009-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE


Grid connected photovoltaic systems – Minimum requirements for system
documentation, commissioning tests and inspection

Systèmes photovoltaïques connectés au réseau électrique – Exigences
minimales pour la documentation du système, les essais de mise en service et
l’examen

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
T
CODE PRIX
ICS 27.160 ISBN 2-8318-1037-6
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

---------------------- Page: 7 ----------------------

SIST EN 62446:2010
– 2 – 62446 © IEC:2009
CONTENTS
FOREWORD.4
INTRODUCTION.6
1 Scope and object.7
2 Normative references .7
3 Terms and definitions .7
4 System documentation requirements .8
4.1 General .8
4.2 System data .8
4.2.1 Basic system information.8
4.2.2 System designer information .8
4.2.3 System installer information.9
4.3 Wiring diagram .9
4.3.1 General .9
4.3.2 Array - general specifications .9
4.3.3 PV string information .9
4.3.4 Array electrical details .9
4.3.5 Earthing and overvoltage protection .9
4.3.6 AC system .10
4.4 Datasheets.10
4.5 Mechanical design information .10
4.6 Operation and maintenance information .10
4.7 Test results and commissioning data.10
5 Verification .10
5.1 General .10
5.2 General .11
5.3 Inspection .11
5.3.1 General .11
5.3.2 DC system inspection .11
5.3.3 Protection against overvoltage / electric shock .12
5.3.4 AC system .12
5.3.5 Labelling and identification .12
5.4 Testing .13
5.4.1 General .13
5.4.2 Continuity of protective earthing and/or equipotential bonding
13
conductors.
5.4.3 Polarity test .13
5.4.4 PV string - open circuit voltage measurement .13
5.4.5 PV string - current measurement .14
5.4.6 Functional tests .15
5.4.7 PV array Insulation resistance test .15
5.5 Verification reports .17
5.5.1 General .17
5.5.2 Initial verification .17
5.5.3 Periodic verification .17
Annex A (informative) Model verification certificate.18
Annex B (informative) Model inspection report .19

---------------------- Page: 8 ----------------------

SIST EN 62446:2010
62446 © IEC:2009 – 3 –
Annex C (informative) Model PV array test report .21
Annex D (informative) PV array infrared camera inspection procedure.23

Table 1 – Minimum values of insulation resistance.17

---------------------- Page: 9 ----------------------

SIST EN 62446:2010
– 4 – 62446 © IEC:2009
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

GRID CONNECTED PHOTOVOLTAIC SYSTEMS –
MINIMUM REQUIREMENTS FOR SYSTEM DOCUMENTATION,
COMMISSIONING TESTS AND INSPECTION


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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
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 62446 has been prepared by IEC technical committee 82: Solar
photovoltaic energy systems.
The text of this standard is based on the following documents:
FDIS Report on voting
82/558A/FDIS 82/564/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.

---------------------- Page: 10 ----------------------

SIST EN 62446:2010
62446 © IEC:2009 – 5 –
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result 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: 11 ----------------------

SIST EN 62446:2010
– 6 – 62446 © IEC:2009
INTRODUCTION
Grid connected PV systems are expected to have a lifetime of decades, with maintenance or
modifications likely at some point over this period. Building or electrical works in the vicinity of
the PV array are very likely, for example roof works adjacent to the array or modifications
(structural or electrical) to a home that has a PV system. The ownership of a system may also
change over time, particularly for systems mounted on buildings. Only by the provision of
adequate documentation at the outset can the long term performance and safety of the PV
system and works, on or adjacent to the PV system, be ensured.
This standard is split into 2 parts:
• System documentation requirements (Clause 4) – This clause details the information
that shall be provided, as a minimum, within the documentation provided to the customer
following the installation of a grid connected PV system.
• Verification (Clause 5) – This clause provides the information expected to be provided
following initial (or periodic) verification of an installed system. It includes requirements for
inspection and testing.

---------------------- Page: 12 ----------------------

SIST EN 62446:2010
62446 © IEC:2009 – 7 –
GRID CONNECTED PHOTOVOLTAIC SYSTEMS –
MINIMUM REQUIREMENTS FOR SYSTEM DOCUMENTATION,
COMMISSIONING TESTS AND INSPECTION



1 Scope and object
This International Standard defines the minimal information and documentation required to be
handed over to a customer following the installation of a grid connected PV system. This
standard also describes the minimum commissioning tests, inspection criteria and
documentation expected to verify the safe installation and correct operation of the system.
The document can also be used for periodic retesting.
This standard is written for grid connected PV systems only and not for AC module systems or
systems that utilize energy storage (e.g. batteries) or hybrid systems.
NOTE It is expected that additional information and commissioning tests will be required in some circumstances,
e.g. for large commercial installations.
This standard is for use by system designers and installers of grid connected solar PV
systems as a template to provide effective documentation to a customer. By detailing the
expected minimum commissioning tests and inspection criteria, it is also intended to assist in
the verification / inspection of a grid connected PV system after installation and for
subsequent re-inspection, maintenance or modifications.
2 Normative references
The following referenced documents are indispensable for the application of this standard. For
dated references, only the edition cited applies. For undated references, the latest edition of
the referenced document (including any amendments) applies.
IEC 60364 (all parts), Low-voltage electrical installations
IEC 60364-6, Low-voltage electrical installations – Part 6: Verification
IEC 60364-7-712:2002, Electrical installations of buildings – Part 7-712: Requirements for
special installations or locations – Solar photovoltaic (PV) power supply systems
IEC/TR 60755:2008, General requirements for residual current operated protective devices
IEC 61557 (all parts), Electrical safety in low voltage distribution systems up to 1000 V AC
and 1500 V DC – Equipment for testing, measuring or monitoring of protective measures
IEC 61730-1, Photovoltaic (PV) module safety qualification – Part 1: Requirements for
construction
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply:
3.1
verification
all measures by means of which compliance of the electrical installation to the relevant
standards is checked

---------------------- Page: 13 ----------------------

SIST EN 62446:2010
– 8 – 62446 © IEC:2009
NOTE it comprises inspection, testing and reporting.
3.2
inspection
examination of an electrical installation using all the senses in order to ascertain correct
selection and proper erection of electrical equipment
3.3
testing
implementation of measures in an electrical installation by means of which its effectiveness is
proved
NOTE It includes ascertaining values by means of appropriate measuring instruments, said values not being
detectable by inspection.
3.4
reporting
recording of the results of inspection and testing
3.5
data sheet
a basic product description and specification
NOTE Typically one or two pages. Not a full product manual.
4 System documentation requirements
4.1 General
The purpose of this Clause is to list the minimum documentation that should be provided
following the installation of a grid connected PV system. This information will ensure key
system data is readily available to a customer, inspector or maintenance engineer. The
documentation includes basic system data and the information expected to be provided in the
operation and maintenance manual.
4.2 System data
4.2.1 Basic system information
As a minimum, the following basic system information shall be provided. This “nameplate”
information would typically be presented on the cover page of the system documentation
pack.
a) Project identification reference (where applicable).
b) Rated system power (kW DC or kVA AC).
c) PV modules and inverters - manufacturer, model and quantity.
d) Installation date.
e) Commissioning date.
f) Customer name.
g) Site address.
4.2.2 System designer information
As a minimum, the following information shall be provided for all bodies responsible for the
design of the system. Where more than one company has responsibility for the design of the
system, the following information should be provided for all companies together with a
description of their role in the project.
a) System designer, company.

---------------------- Page: 14 ----------------------

SIST EN 62446:2010
62446 © IEC:2009 – 9 –
b) System designer, contact person.
c) System designer, postal address, telephone number and e-mail address.
4.2.3 System installer information
As a minimum, the following information shall be provided for all bodies responsible for the
installation of the system. Where more than one company has responsibility for the
installation of the system, the following information should be provided for all companies
together with a description of their role in the project.
a) System installer, company.
b) System installer, contact person.
c) System installer, postal address, telephone number and e-mail address.
4.3 Wiring diagram
4.3.1 General
As a minimum, a single line wiring diagram shall be provided. This diagram shall be annotated
to include the information detailed in the following subclauses:
NOTE In general, it is expected that this information will be presented as annotations to the single line wiring
diagram. In some circumstances, typically for larger systems where space on the diagram may be limited, this
information may be presented in table form.
4.3.2 Array - general specifications
The wiring diagram shall include the following array design information
a) Module type(s)
b) Total number of modules
c) Number of strings
d) Modules per string
4.3.3 PV string information
The wiring diagram shall include the following PV string information
a) String cable specifications – size and type.
b) String over-current protective device specifications (where fitted)- type and voltage/current
ratings.
c) Blocking diode type (if relevant).
4.3.4 Array electrical details
The wiring diagram shall include the following array electrical information
a) Array main cable specifications – size and type.
b) Array junction box locations (where applicable).
c) DC isolator type, location and rating (voltage / current).
d) Array over-current protective devices (where applicable) – type, location and rating
(voltage / current).
4.3.5 Earthing and overvoltage protection
The wiring diagram shall include the following earthing and overvoltage protection information
a) Details of all earth / bonding conductors – size and connection points. Including details of
array frame equipotential bonding cable where fitted.

---------------------- Page: 15 ----------------------

SIST EN 62446:2010
– 10 – 62446 © IEC:2009
b) Details of any connections to an existing Lightning Protection System (LPS).
c) Details of any surge protection device installed (both on AC and DC lines) to include
location, type and rating.
4.3.6 AC system
The wiring diagram shall include the following AC system information
a) AC isolator location, type and rating.
b) AC overcurrent protective device location, type and rating.
c) Residual current device location, type and rating (where fitted).
4.4 Datasheets
As a minimum, datasheets shall be provided for the following system components
a) Module datasheet for all types of modules used in the system - to the requirements of
IEC 61730-1.
b) Inverter datasheet for all types of inverters used in the system.
NOTE The provision of datasheets for other significant system components should also be considered.
4.5 Mechanical design information
A data sheet for the array mounting system shall be provided.
4.6 Operation and maintenance information
Operation and maintenance information shall be provided and shall include, as a minimum,
the following items:
a) Procedures for verifying correct system operation.
b) A checklist of what to do in case of a system failure.
c) Emergency shutdown / isolation procedures.
d) Maintenance and cleaning recommendations (if any).
e) Considerations for any future building works related to the PV array (e.g. roof works).
f) Warranty documentation for PV modules and inverters - to include starting date of
warranty and period of warranty.
g) Documentation on any applicable workmanship or weather-tightness warranties.
4.7 Test results and commissioning data
Copies of all test and commissioning data shall be provided. As a minimum, these shall
include the results from the verification tests detailed in Clause 5 of this standard.
5 Verification
5.1 General
Much of the verification of a grid connected PV system should be done with reference to
IEC 60364-6 which provides the requirements for initial and periodic verification of any
electrical installation.
This Clause provides the requirements for the initial and periodic verification of a grid
connected PV electrical installation in particular. It references IEC 60364-6 where appropriate
and also details additional requirements or considerations for the verification of a PV system.

---------------------- Page: 16 ----------------------

SIST EN 62446:2010
62446 © IEC:2009 – 11 –
Initial verification takes place upon completion of a new installation or completion of additions
or of alterations to existing installations. Periodic verification is to determine, as far as
reasonably practicable, whether the installation and all its constituent equipment remain in a
satisfactory condition for use.
NOTE Typical verification test sheets are provided in the annexes to this standard.
5.2 General
Every installation of subsystems and components shall be verified during erection, as far as
reasonably practicable, and on completion, before being put into service by the user with
reference to IEC 60364-6. Initial verification shall include comparison of the results with relevant
criteria to confirm that the requirements of IEC 60364 have been met.
For an addition or alteration to an existing installation, it shall be verified that the addition or
alteration complies with IEC 60364 and does not impair the safety of the existing installation.
Initial and periodic verifications shall be made by a skilled person, competent in verification.
5.3 Inspection
5.3.1 General
Inspection shall precede testing and shall normally be done prior to energizing the installation.
The inspection shall be done to the requirements of IEC 60364-6.
It is to be ensured that the following items, specific to grid connected PV systems, are
included in the inspection:
5.3.2 DC system inspection
Inspection of the DC installation shall include, at least verification that:
a) The DC system has been designed, specified and installed to the requirements of
IEC 60364 in general and IEC 60364-7-712 in particular.
b) All DC components are rated for continuous operation at DC and at the maximum possible
DC system voltage and maximum possible DC fault current (V corrected for local
oc stc
temperature range and based on module type; and current at 1,25 × I according to
sc stc
IEC 60364-7-712.433:2002).
c) Protection by use of class II or equivalent insulation adopted on the DC side – yes / no
(class II preferred - IEC 60364-7-712.413.2:2002).
d) PV string cables, PV array cables and PV DC main cables have been selected and
erected so as to minimize the risk of earth faults and short-circuits (IEC 60364-7-
712.522.8.1:2002). Typically achieved by the use of cables with protective and reinforced
insulation (often termed “double insulated”).
e) Wiring systems have been selected and erected to withstand the expected external
influences such as wind, ice formatio
...