IEC 62920:2017/AMD1:2021

IEC 62920 ®
Edition 1.0 2021-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
A MENDMENT 1
AM ENDEMENT 1
Photovoltaic power generating systems – EMC requirements and test methods
for power conversion equipment

Systèmes de production d'énergie photovoltaïque – Exigences de CEM et
méthodes d'essai pour les équipements de conversion de puissance

IEC 62920:2017-07/AMD1:2021-04(en-fr)

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IEC 62920 ®
Edition 1.0 2021-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
A MENDMENT 1
AM ENDEMENT 1
Photovoltaic power generating systems – EMC requirements and test methods

for power conversion equipment

Systèmes de production d'énergie photovoltaïque – Exigences de CEM et

méthodes d'essai pour les équipements de conversion de puissance

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 27.160 ISBN 978-2-8322-9595-3

– 2 – IEC 62920:2017/AMD1:2021
© IEC 2021
FOREWORD
This amendment has been prepared by the IEC technical committee 82: Solar photovoltaic
energy systems.
The text of this amendment is based on the following documents:
FDIS Report on voting
82/1835/FDIS 82/1874/RVD
Full information on the voting for the approval of this amendment can be found in the report on
voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this amendment and the base publication will
remain unchanged until the stability date indicated on the IEC website 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• withdrawn,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.
_____________
INTRODUCTION
Replace the existing text of the Introduction with the following:
Background
Power conversion equipment (PCE) is indispensable for solar photovoltaic power energy
systems in order to convert the DC electric power energy generated by solar photovoltaic panels
into AC or DC electric power, and to feed the AC power energy into the AC mains network or
loads. PCE consists of DC to DC, DC to AC or AC to DC converters and forms systems with or
without DC-coupled electrical energy storage devices.
Manufacturers of PCE ensure the performance and reliability of PCE. Electromagnetic
compatibility (EMC) is one aspect of performance which must be ensured wherever PCE is used
in or exposed to an electromagnetic environment.
IEC Guide 107 specifies that TC 77 and CISPR, which are called EMC committees, have
responsibility for the development of basic, product family and generic standards on EMC
requirements, and product committees must use the emission limits developed by EMC
committees and must refer to basic immunity standards for the specification of test techniques.

© IEC 2021
However, when the EMC standards which are developed by TC 77 and CISPR are not
considered suitable for a particular product or electromagnetic environment, product
committees must seek their assistance and advice for any change in the emission limits and/or
measurement requirements. Product committees are responsible for selecting the appropriate
immunity test items and levels for their products as well as for defining the relevant performance
criteria for the evaluation of the immunity test results. Consequently, product committees, such
as TC 22, TC 26, TC 9, and TC 69, have their own EMC standard to define EMC requirements
and test methods for their particular types of products.
TC 82 also has the responsibility to consider EMC requirements for PCE applying to the solar
photovoltaic power energy systems, and TC 82 has taken action as follows to develop its own
product EMC standards:
a) selection of the immunity test items in accordance with EMC environments for the solar
photovoltaic power energy systems,
b) supplement of generic standards with a detailed description of test conditions and test set
up,
c) development of the conditional limits and alternative test methods in terms of installation
environmental and operational conditions, and
d) development of appropriate requirements and test method for high power equipment.
In 2017, TC82 published IEC 62920 (Ed.1.0). By taking into account the latest market needs,
IEC 62920:2017 (Ed.1.0) has covered the above mentioned items and presents the minimum
EMC requirements for PCE applying to solar photovoltaic power energy systems.
Purpose of the maintenance of a product EMC standard
Following the state of the art technology as well as the latest market needs, users of standards
recognize the improvement of product EMC standards. The maintenance of product standards
is also one of important activities for product committees.
IEC 62920:2017 (Ed.1.0) is amended to extend the scope of IEC 62920:2017 (Ed.1.0) by taking
into account the following technical items.
– DC to DC power conversion equipment used in photovoltaic power energy systems.
– Electrical energy storage devices connected to DC power ports of PCE used in photovoltaic
power energy systems.
Furthermore, IEC 62920:2017 (Ed.1.0) is amended to cover the latest options of measurement
distance of radiated disturbances by taking the latest updates of CISPR 16-1-4 and CISPR 16-
2-3 into consideration to adapt it to different sizes of products.
1 Scope
Replace the existing first paragraph with the following:
This document specifies electromagnetic compatibility (EMC) requirements for power
conversion equipment (PCE) (e.g. DC to DC, DC to AC and AC to DC) for use in photovoltaic
(PV) power systems with or without DC-coupled electrical energy storage devices.

– 4 – IEC 62920:2017/AMD1:2021
© IEC 2021
3 Terms and definitions
Replace the existing terms and definitions with the following:
3.1
photovoltaic power generating system
PV system
electric power generating system which uses the photovoltaic effect to convert solar power into
electricity
3.2
power conversion equipment
PCE
electrical device converting one form of electrical power to another form of electrical power with
respect to voltage, current, frequency, phase and the number of phases
[SOURCE: IEC 62109-1:2010, 3.66, modified – The definition has been rephrased, and the note
has been deleted.]
3.3
photovoltaic module
PV modules
complete and environmentally protected assembly of interconnected photovoltaic cells
[SOURCE: IEC TS 61836:2016, 3.1.48.7, modified – The note has been deleted.]
3.4
electrical energy storage devices
ESS
devices that are able to absorb electrical energy, to store it for a certain amount of time and to
release electrical energy during which energy conversion processes may be included
[SOURCE: IEC 62933-1:2018, 3.1, modified – The example and the note have been deleted.]
3.5
port
particular interface of the PCE with the external electromagnetic environment
Note 1 to entry: See Figure 1 for examples of ports.

Figure 1 – Example of ports
3.6
enclosure port
physical boundary of the PCE product which electromagnetic fields may radiate through or
impinge on
© IEC 2021
3.7
AC mains power port
port used to connect to a public low voltage AC mains power distribution network or other low
voltage AC mains installation
3.8
auxiliary AC power port
additional low voltage AC power port for purposes other than feeding in AC power
3.9
DC power port
port used to connect a local low voltage DC power generating system or electrical energy
storage devices
3.10
auxiliary DC power port
additional low voltage DC power port for purposes other than supplying DC power for the DC
to AC conversion or electrical energy storage devices
3.11
signal and control port
port intended for the interconnection of components of PCE, or between PCE and local auxiliary
equipment, and used in accordance with relevant functional specifications
Note 1 to entry: Examples include RS-232, Universal Serial Bus (USB), high-definition multimedia interface (HDMI),
IEEE standard 1394 (“Fire Wire”) and control pilot.
3.12
wired network port
point to connection for voice, data and signalling transfers intended to interconnect widely
dispersed systems by direct connection to a single-user or multi-user communication network
Note 1 to entry: Examples include CATV, PSTN, ISDN, xDSL, LAN and similar networks. These ports can support
screened or unscreened cables and can also carry AC or DC power where this is an integral part of the
telecommunication specification.
3.13
high power electronic equipment and system
one or more power conversion equipment with a combined rated power greater than 75 kVA, or
a system containing such equipment
3.14
low voltage
LV
set of voltage levels used for the distribution of electricity and whose upper limit is generally
accepted to be 1 000 V AC or 1 500 V DC
3.15
high voltage
HV
a) in a general sense, the set of voltage levels in excess of low voltage
b) in a restrictive sense, the set of upper voltage levels used in power system for bulk
transmission of electricity
[SOURCE: IEC 60050-601:1985, 601-01-27]

– 6 – IEC 62920:2017/AMD1:2021
© IEC 2021
3.16
medium voltage
MV
any set of voltage levels lying between low and high voltage
[SOURCE: IEC 60050-601:1985, 601-01-28, modified – The note has been deleted.]
3.17
small equipment
...