SIST EN IEC 61851-25:2021

SLOVENSKI STANDARD
SIST EN IEC 61851-25:2021
01-marec-2021
Sistem kabelskega napajanja električnih vozil - 23-2. del: Oprema za enosmerno
napajanje EV, kjer varnost zagotavlja električno ločevanje
Electric vehicle conductive charging system - Part 23-2: DC EV supply equipment where
protection relies on electrical separation
Ta slovenski standard je istoveten z: EN IEC 61851-25:2021
ICS:
43.120 Električna cestna vozila Electric road vehicles
SIST EN IEC 61851-25:2021 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 61851-25:2021

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SIST EN IEC 61851-25:2021


EUROPEAN STANDARD EN IEC 61851-25

NORME EUROPÉENNE

EUROPÄISCHE NORM
January 2021
ICS 43.120

English Version
Electric vehicle conductive charging system - Part 25: DC EV
supply equipment where protection relies on electrical separation
(IEC 61851-25:2020)
Systeme de charge par conduction pour vehicules Konduktive Ladesysteme für Elektrofahrzeuge - Teil 25:
electriques - Partie 25: Système d'alimentation en courant Gleichstromversorgungseinrichtungen für Elektrofahrzeuge
continu pour véhicules électriques dont la protection bei denen der Schutz von der elektrischen Trennung
s'appuie sur la séparation électrique abhängt
(IEC 61851-25:2020) (IEC 61851-25:2020)
This European Standard was approved by CENELEC on 2021-01-08. 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
© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN IEC 61851-25:2021 E

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SIST EN IEC 61851-25:2021
EN IEC 61851-25:2021 (E)
European foreword
The text of document 69/735/FDIS, future edition 1 of IEC 61851-25, prepared by IEC/TC 69
"Electrical power/energy transfer systems for electrically propelled road vehicles and industrial trucks"
was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN IEC 61851-
25:2021.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2021-10-08
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2024-01-08
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 61851-25:2020 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 61851-21-1 NOTE Harmonized as EN 61851-21-1
IEC 61851-23 NOTE Harmonized as EN 61851-23
IEC 61851-24:2014 NOTE Harmonized as EN 61851-24:2014 (not modified)
ISO 18246:2015 NOTE Harmonized as EN ISO 18246:2017 (not modified)
2

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SIST EN IEC 61851-25:2021
EN IEC 61851-25:2021 (E)
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.
Annex ZA of EN IEC 61851-1:2019 is applicable except as follows:
Add the following references:
Publication Year Title EN/HD Year
IEC 60068-2-30 2005 Environmental testing - Part 2-30: Tests EN 60068-2-30 2005
- Test Db: Damp heat, cyclic (12 h + 12
h cycle)
IEC 61140 2016 Protection against electric shock - EN 61140 2016
Common aspects for installation and
equipment
IEC 61180 2016 High-voltage test techniques for low- EN 61180 2016
voltage equipment - Definitions, test and
procedure requirements, test equipment
IEC 61439-7 2018 Low-voltage switchgear and controlgear - -
assemblies - Part 7: Assemblies for
specific applications such as marinas,
camping sites, market squares, electric
vehicle charging stations
IEC 61851-1 2017 Electric vehicle conductive charging EN IEC 61851-1 2019
system - Part 1: General requirements
IEC 62477-1 2012 Safety requirements for power EN 62477-1 2012
electronic converter systems and
equipment - Part 1: General
- - + A11 2014
- - + A12 2021
IEC 62893-4-1 2020 Charging cables for electric vehicles of - -
rated voltages up to and including 0,6/1
kV - Part 4-1: Cables for DC charging
according to mode 4 of IEC 61851-1 -
DC charging without use of a thermal
management system
3

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EN IEC 61851-25:2021 (E)
Publication Year Title EN/HD Year
ISO 3297 2017 Information and documentation - - -
International standard serial number
(ISSN)
ISO 11898-1 2015 Road vehicles - Controller area network - -
(CAN) - Part 1: Data link layer and
physical signalling
ISO 11898-2 2016 Road vehicles - Controller area network - -
(CAN) - Part 2: High-speed medium
access unit

4

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SIST EN IEC 61851-25:2021



IEC 61851-25

®


Edition 1.0 2020-12




INTERNATIONAL



STANDARD




NORME


INTERNATIONALE











Electric vehicle conductive charging system –

Part 25: DC EV supply equipment where protection relies on electrical

separation



Systeme de charge par conduction pour vehicules electriques –

Partie 25: Système d'alimentation en courant continu pour véhicules électriques


dont la protection s'appuie sur la séparation électrique













INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 43.120 ISBN 978-2-8322-9122-1




Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 8
3 Terms and definitions . 8
4 General requirements . 10
5 Classification . 11
6 Charging modes and functions . 11
7 Communications . 17
8 Protection against electric shock . 18
9 Conductive electrical interface requirements. 19
10 Requirements for adaptors . 20
11 Cable assembly requirements . 20
12 EV supply equipment constructional requirements and tests . 21
13 Overload and short-circuit protection . 26
14 Automatic reclosing of protective devices . 27
15 Emergency switching or disconnect (optional) . 27
16 Marking and instructions . 27
Annex AA (normative)  Interface between DC EV supply equipment and EV . 29
Annex BB (normative) Level, timing and tolerance of DC output current and DC output
voltage . 32
Annex CC (normative) Description of test equipment, test reporting and test
environment . 38
Annex DD (normative) Compliance tests . 42
Annex EE (normative) Energy transfer process and communication . 51
Annex FF (normative) Digital communication for control of energy transfer . 57
Bibliography . 65

Figure 1 – Measuring network for touch current evaluation weighted for perception or
reaction . 24
Figure 2 – Example of warning label . 28
Figure AA.1 – Interface circuit for energy transfer control showing isolation barriers . 31
Figure BB.1 – Step response for constant value control . 33
Figure BB.2 – Example of DC output current flow controlled by the DC EV supply
equipment and the corresponding terminal voltage using a simple battery model . 35
Figure BB.3 – Example of current limiting followed by voltage limiting for resistive load . 36
Figure CC.1 – Example of test circuit for DUT using a computer and external EV
simulation circuit . 38
Figure CC.2 – Example of test load . 39
Figure CC.3 – Operation points . 41
Figure EE.1 − State transition diagram of charging process . 53
Figure EE.2 – Sequence diagram of energy transfer . 54
Figure FF.1 – Transmission cycle . 57

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Table 1 – Normal shutdown events and conditions . 16
Table 2 – Error shutdown events and conditions . 16
Table AA.1 – Voltage of control pilot circuit . 29
Table AA.2 – Parameter values for interface circuit . 31
Table BB.1 – Requirements for the output response performance of DC EV supply
equipment . 34
Table BB.2 – Current ripple limit of DC EV supply equipment. 37
Table DD.1 – Correspondence between requirements and test descriptions . 42
Table DD.2 – Initial switch and parameter values for a normal start-up sequence . 43
Table DD.3 – The test value for control pilot circuit . 46
Table DD.4 – Shutdown requirements . 49
Table EE.1– Energy transfer state of DC EV supply equipment . 51
Table FF.1 – Physical/data link layer specification . 57
Table FF.2 – Received parameters during energy transfer (1 of 3) . 59
Table FF.3 – Transmitted parameters during DC charging (1 of 2) . 62

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INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

ELECTRIC VEHICLE CONDUCTIVE CHARGING SYSTEM –

Part 25: DC EV supply equipment where protection
relies on electrical separation

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 61851-25 has been prepared by IEC technical committee 69:
Electrical power/energy transfer systems for electrically propelled road vehicles and industrial
trucks.
The text of this International Standard is based on the following documents:
FDIS Report on voting
69/735/FDIS 69/740/RVD

Full information on the voting for the approval of this International Standard 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.
This document is to be read in conjunction with IEC 61851-1:2017.

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IEC 61851-25:2020 © IEC 2020 – 5 –
This document supplements or modifies clauses in IEC 61851-1:2017. Where the text of
subsequent clauses indicates an "addition" to or a "replacement" of the relevant requirement,
test specification or explanation of IEC 61851-1:2017, these changes are made to the relevant
text of IEC 61851-1:2017, which then becomes part of this document. Where no change is
necessary, the words "Clause X of IEC 61851-1:2017 is applicable" are used. Additional
clauses, tables and figures which are not included in IEC 61851-1:2017 have a number starting
from 101. Additional annexes are lettered AA, BB, etc.
A list of all parts in the IEC 61851 series, published under the general title Electric vehicle
conductive charging system, can be found on the IEC website.
In this document, the following print types are used:
– test specifications: italic type.
– notes: smaller roman type.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

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INTRODUCTION
This document describes the specific requirements for DC EV supply equipment whose
secondary circuit and EV are protected from the primary power supply circuit by electrical
separation as defined in IEC 61140, where the connection to the separated circuit is limited to
a single connection.

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IEC 61851-25:2020 © IEC 2020 – 7 –
ELECTRIC VEHICLE CONDUCTIVE CHARGING SYSTEM –

Part 25: DC EV supply equipment where protection
relies on electrical separation



1 Scope
This document applies to the DC EV supply equipment for charging electric road vehicles with
a rated supply voltage of up to 480 V AC or up to 600 V DC, with rated output voltage not
exceeding 120 V DC and output currents not exceeding 100 A DC.
This document provides the requirements for the DC EV supply equipment where the secondary
circuit is protected from the primary circuit by electrical separation.
Requirements for bi-directional power flow are not covered in this document.
This document also provides the requirements for the control and the communication between
DC EV supply equipment and an EV.
This document also applies to DC EV supply equipment supplied from on-site storage systems.
The aspects covered in this document include:
• characteristics and operating conditions of the DC EV supply equipment;
• specification of the connection between the DC EV supply equipment and the EV;
• requirements for electrical safety for the DC EV supply equipment.
Additional requirements can apply to equipment designed for specific environments or
conditions, for example:
• DC EV supply equipment located in hazardous areas where flammable gas or vapour and/or
combustible materials, fuels or other combustible, or explosive materials are present;
• DC EV supply equipment designed to be installed at an altitude of more than 2 000 m;
• DC EV supply equipment intended to be used on-board ships.
Requirements for electrical devices and components used in DC EV supply equipment are not
included in this document and are covered by their specific product standards.
This document does not apply to:
• safety aspects related to maintenance;
• charging of trolley buses, rail vehicles, industrial trucks and vehicles designed primarily for
use off-road;
• equipment on the EV;
• EMC requirements for equipment on the EV while connected, which are covered in
IEC 61851-21-1;
• charging the RESS off-board the EV.
NOTE In the following countries electrical separation can only be handled by skilled people: CH

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2 Normative references
Clause 2 of IEC 61851-1:2017 is applicable with the following additions.
IEC 60068-2-30:2005, Environmental testing – Part 2-30: Tests – Test Db: Damp heat, cyclic
(12 h + 12 h cycle)
IEC 61140:2016, Protection against electric shock – Common aspects for installations and
equipment
IEC 61180:2016, High-voltage test techniques for low-voltage equipment – Definitions, test and
procedure requirements, test equipment
IEC 61439-7:2018, Low-voltage switchgear and controlgear assemblies –Part 7: Assemblies
for specific applications such as marinas, camping sites, market squares, electric vehicle
charging stations
IEC 61851-1:2017, Electric vehicle conductive charging system – Part 1: General
requirements
IEC 62477-1:2012, Safety requirements for power electronic converter systems and equipment
– Part 1: General
IEC 62893-4-1:2020, Charging cables for electric vehicles of rated voltages up to and including
0,6/1 kV – Part 4-1: Cables for DC charging according to mode 4 of IEC 61851-1 – DC charging
without use of a thermal management system
ISO 3297:2017, Information and documentation – International standard serial number (ISSN)
ISO 11898-1:2015, Road vehicles – Controller area network (CAN) – Part 1: Data link layer and
physical signalling
ISO 11898-2:2016, Road vehicles – Controller area network (CAN) – Part 2: High-speed
medium access unit
3 Terms and definitions
Clause 3 of IEC 61851-1:2017 is applicable with the following additions to 3.2, 3.3 and 3.7.
ISO and IEC maintain terminological data bases for use in standardization at the following
addresses:
• ISO Online browsing platform: available at https: //www.iso.org/obp
• IEC Electropedia: available at http: //www.electropedia.org/
3.2 Insulation
3.2.101
electrical separation
protective measure in which hazardous-live-parts are insulated from all other electric circuits
and parts, from local earth and from touch
[SOURCE: IEC 60050-826:2004, 826-12-27]

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3.3 Functions
3.3.101
normal start-up sequence
beginning of an energy transfer sequence with the commands and parameters that are used to
transfer energy to an EV when no error condition arises during the energy transfer sequence
3.3.102
normal shutdown
termination of the energy transfer process initiated by the user, by the EV or by the DC EV
supply equipment, and not caused by a failure
3.3.103
error shutdown
termination of the energy transfer process caused by a failure detected by the DC EV supply
equipment or the EV
3.3.104
emergency shutdown
termination of the energy transfer process caused by a failure detected by the DC EV supply
equipment or the EV that may present a safety hazard
3.3.105
control pilot wire
insulated wire incorporated in a cable assembly which is part of the control pilot circuit
3.3.106
digital communication
digitally encoded information exchanged between DC EV supply equipment and an EV, as well
as the method by which it is exchanged
[SOURCE: IEC 61851-24:2014, 3.1, modified – The term "charging station" has been replaced
with "supply equipment".]
3.3.107
signal
data element that is communicated between DC EV supply equipment and an EV using any
means other than digital communication
[SOURCE: IEC 61851-24:2014, 3.2, modified – The term "charging station" has been replaced
with "supply equipment".]
3.3.108
device under test
DUT
sample of DC EV supply equipment that is submitted for testing
3.7 General terms
3.7.101
available DC output power
maximum DC output power that the DC EV supply equipment can supply
3.7.102
available DC output power parameter
parameter transmitted to the EV indicating the available DC output power

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3.7.103
DC output current
DC current supplied to the EV by the DC EV supply equipment
3.7.104
available DC output current
value of the highest DC current that the DC EV supply equipment can supply to the EV at a
given time
3.7.105
available DC output current parameter
parameter sent by the EV supply equipment to the vehicle that indicates the highest current
that can be supplied to the EV
3.7.106
rated DC output current
output current assigned to the DC EV supply equipment by the manufacturer under normal
operating conditions
3.7.107
requested DC output current
value of the DC output current that is requested by the EV
3.7.108
requested DC output current parameter
parameter sent by the EV to the DC EV supply equipment indicating the requested DC output
current
3.7.109
DC output voltage
voltage present between the DC+ and DC− terminals at the vehicle connector
3.7.110
rated DC output voltage
output voltage assigned to the DC EV supply equipment by the manufacturer
3.7.111
rated DC output voltage parameter
parameter sent by the DC EV supply equipment to indicate the rated DC output voltage
3.7.112
DC output voltage target parameter
value sent by the EV to the DC EV supply equipment that indicates the requested value of the
DC output voltage
3.7.113
DC output voltage limit parameter
value sent by the EV to the DC EV supply equipment that indicates the allowable DC output
voltage
4 General requirements
Clause 4 of IEC 61851-1:2017 is applicable.

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5 Classification
Clause 5 of IEC 61851-1:2017 is applicable, except as follows.
5.1.2 Characteristics of power supply output
Replacement:
The EV supply equipment shall be classified as DC EV supply equipment.
5.6 Protection against electric shock
Subclause 5.6 of IEC 61851-1:2017 is not applicable.
5.7 Charging modes
Subclause 5.7 of IEC 61851-1:2017 is not applicable.
6 Charging modes and functions
Clause 6 of IEC 61851-1:2017 is applicable, except as follows.
6.1 General
Replacement:
Clause 6 describes the functions for energy transfer to EVs.
6.2 Charging modes
Subclause 6.2 of IEC 61851-1:2017 is not applicable.
6.3 Functions provided in Mode 2, 3 and 4
Subclause 6.3 of IEC 61851-1:2017 is replaced by the following:
6.3 Mandatory functions
6.3.1 General
The DC EV supply equipment shall supply a DC output current to the EV in accordance with the
requested DC output current parameter from the EV, subject to the requirements of the
mandatory functions as indicated below.
NOTE The DC EV
...