SIST-TS CLC IEC/TS 61851-3-1:2024

SLOVENSKI STANDARD
01-marec-2024
Sistemi za napajanje električnih vozil - 3-1. del: Oprema za napajanje električnih
vozil z enosmernim tokom, kjer varnost zagotavlja dvojna ali ojačena izolacija -
Splošna pravila in zahteve za stacionarno opremo (IEC/TS 61851-3-1:2023)
Electric vehicles conductive charging system - Part 3-1: DC EV supply equipment where
protection relies on double or reinforced insulation - General rules and requirements for
stationary equipment (IEC/TS 61851-3-1:2023)
Konduktive Ladesysteme für Elektrofahrzeuge - Teil 3-1: Gleichstrom-
Versorgungseinrichtungen für Elektrofahrzeuge mit Schutzwirkung durch doppelte oder
verstärkte Isolierung - Allgemeine Regeln und Anforderungen für ortsfeste Betriebsmittel
(IEC/TS 61851-3-1:2023)
Système de charge conductive pour véhicules électriques - Partie 3-1 : Exigences
générales relatives aux systèmes de charge conductive en courant alternatif et continu
des véhicules électriques légers (IEC/TS 61851-3-1:2023)
Ta slovenski standard je istoveten z: CLC IEC/TS 61851-3-1:2023
ICS:
43.120 Električna cestna vozila Electric road vehicles
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

TECHNICAL SPECIFICATION CLC IEC/TS 61851-3-1

SPÉCIFICATION TECHNIQUE
TECHNISCHE SPEZIFIKATION December 2023
ICS 43.120
English Version
Electric vehicles conductive charging system - Part 3-1: DC EV
supply equipment where protection relies on double or reinforced
insulation - General rules and requirements for stationary
equipment
(IEC/TS 61851-3-1:2023)
Système de charge conductive pour véhicules électriques - Konduktive Ladesysteme für Elektrofahrzeuge - Teil 3-1:
Partie 3-1 : Exigences générales relatives aux systèmes de Gleichstrom-Versorgungseinrichtungen für
charge conductive en courant alternatif et continu des Elektrofahrzeuge mit Schutzwirkung durch doppelte oder
véhicules électriques légers verstärkte Isolierung - Allgemeine Regeln und
(IEC/TS 61851-3-1:2023) Anforderungen für ortsfeste Betriebsmittel
(IEC/TS 61851-3-1:2023)
This Technical Specification was approved by CENELEC on 2023-12-04.

CENELEC members are required to announce the existence of this TS in the same way as for an EN and to make the TS available promptly
at national level in an appropriate form. It is permissible to keep conflicting national standards in force.

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,
Türkiye 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
© 2023 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. CLC IEC/TS 61851-3-1:2023 E

European foreword
This document (CLC IEC/TS 61851-3-1:2023) consists of the text of IEC/TS 61851-3-1:2023,
prepared by IEC/TC 69 "Electrical power/energy transfer systems for electrically propelled road
vehicles and industrial trucks”.
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.
This document has been prepared under a standardization request addressed to CENELEC by the
European Commission. The Standing Committee of the EFTA States subsequently approves these
requests for its Member States.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Technical Specification IEC/TS 61851-3-1:2023 was approved by
CENELEC as a European Technical Specification without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
IEC 60309 series NOTE Approved as EN IEC 60309 series
IEC 60309-1:2021 NOTE Approved as EN IEC 60309-1:2022 (not modified)
IEC 60309-4:2021 NOTE Approved as EN IEC 60309-4:2022 (not modified)
IEC 60309-5:2017 NOTE Approved as EN IEC 60309-5:2019 (not modified)
IEC 60320-1:2021 NOTE Approved as EN IEC 60320-1:2021 (not modified)
IEC 60364 series NOTE Approved as HD 60364 series
IEC 61557-8:2014 NOTE Approved as EN 61557-8:2015 (not modified)
IEC 61851-21-1:2017 NOTE Approved as EN 61851-21-1:2017 (not modified)
IEC 61851-21-2:2018 NOTE Approved as EN IEC 61851-21-2:2021 (not modified)
IEC 62053-21:2020 NOTE Approved as EN IEC 62053-21:2021 (not modified)
+ A11:2021
IEC 62196-3:2022 NOTE Approved as EN IEC 62196-3:2022 (not modified)
IEC 62196-6:2022 NOTE Approved as EN IEC 62196-6:2022 (not modified)
ISO 4628-3:2016 NOTE Approved as EN ISO 4628-3:2016 (not modified)
ISO 18246:2023 NOTE Approved as EN ISO 18246:2023 (not modified)
IEC 60068-2-2 NOTE Approved as EN 60068-2-2
IEC 60068-2-5:2018 NOTE Approved as EN IEC 60068-2-5:2018 (not modified)
IEC 60068-2-6:2007 NOTE Approved as EN 60068-2-6:2008 (not modified)
IEC 60068-2-14:2009 NOTE Approved as EN 60068-2-14:2009 (not modified)
IEC 60068-2-27:2008 NOTE Approved as EN 60068-2-27:2009 (not modified)
IEC 60068-2-52:2017 NOTE Approved as EN IEC 60068-2-52:2018 (not modified)
IEC 60068-2-53:2010 NOTE Approved as EN 60068-2-53:2010 (not modified)
IEC 60068-2-75 NOTE Approved as EN 60068-2-75
IEC 60085 NOTE Approved as EN 60085
IEC 60112 NOTE Approved as EN IEC 60112
IEC 60216-1:2013 NOTE Approved as EN 60216-1:2013 (not modified)
IEC 60364-4-43:2008 NOTE Approved as HD 60364-4-43:2010
IEC 60364-4-44:2007 NOTE Approved as HD 60364-4-444:2010
IEC 60364-4-44:2007/A1:2015 NOTE Approved as HD 60364-4-443:2016
IEC 60364-6:2016 NOTE Approved as HD 60364-6:2016 (not modified) + A11:2017
IEC 60695-2-11:2021 NOTE Approved as EN IEC 60695-2-11:2021 (not modified)
IEC 60695-10-2:2014 NOTE Approved as EN 60695-10-2:2014 (not modified)
IEC 60947-1:2020 NOTE Approved as EN IEC 60947-1:2021 (not modified)
IEC 60947-6-1:2021 NOTE Approved as EN IEC 60947-6-1:2023 (not modified)
IEC 61140:2016 NOTE Approved as EN 61140:2016 (not modified)
IEC 61316:2021 NOTE Approved as EN IEC 61316:2021 (not modified)
IEC 61439-1:2020 NOTE Approved as EN IEC 61439-1:2021 (not modified)
IEC 61558-1:2017 NOTE Approved as EN IEC 61558-1:2019 (not modified)
IEC 61558-2-4:2021 NOTE Approved as EN IEC 61558-2-4:2021 (not modified)
IEC 61558-2-12:2011 NOTE Approved as EN 61558-2-12:2011 (not modified)
IEC 61558-2-16:2021 NOTE Approved as EN IEC 61558-2-16:2021 (not modified)
IEC 62052-11:2020 NOTE Approved as EN IEC 62052-11:2021 (not modified)
+ A11:2022
IEC 62752:2016 NOTE Approved as EN 62752:2016 (not modified)
IEC 62752:2016/A1:2018 NOTE Approved as EN 62752:2016/A1:2020 (not modified)
ISO 13849-1:2023 NOTE Approved as EN ISO 13849-1:2023 (not modified)
ISO 17409:2020 NOTE Approved as EN ISO 17409:2020 (not modified)

To be published. Stage at the time of publication: FprEN IEC 61558-2-4:2021.
To be published. Stage at the time of publication: FprEN IEC 61558-2-16:2021.
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.cencenelec.eu.
Publication Year Title EN/HD Year
IEC 60038 - IEC standard voltages EN 60038 -
IEC 60068-2-1 2007 Environmental testing - Part 2-1: Tests - EN 60068-2-1 2007
Test A: Cold
IEC 60068-2-11 2021 Environmental testing - Part 2-11: Tests - EN IEC 60068-2-11 2021
Test Ka: Salt mist
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 60068-2-78 2012 Environmental testing - Part 2-78: Tests - EN 60068-2-78 2013
Test Cab: Damp heat, steady state
IEC 60269 series Low-voltage fuses EN 60269 series
IEC 60309-2 2021 Plugs, fixed or portable socket-outlets and EN IEC 60309-2 2022
appliance inelts for industrial purposes - Part
2: Dimensional compatibility requirements
for pin and contact-tube accessories
IEC 60320 - Appliance couplers for household and - -
similar general purposes
IEC 60335-1 2020 Household and similar electrical appliances - - -
Safety - Part 1: General requirements
IEC 60364-4-41 2005 Low-voltage electrical installations - Part 4- HD 60364-4-41 2017
(mod) 41: Protection for safety - Protection against
electric shock
+ A1 2017 - -
- - + A11 2017
- - + A12 2019
IEC 60364-7-722 2018 Low-voltage electrical installations - Part 7- HD 60364-7-722 2018
(mod) 722: Requirements for special installations
or locations - Supplies for electric vehicles
IEC 60529 - Degrees of protection provided by - -
enclosures (IP Code)
Publication Year Title EN/HD Year
IEC 60664-1 2020 Insulation coordination for equipment within EN IEC 60664-1 2020
low-voltage supply systems - Part 1:
Principles, requirements and tests
IEC 60884-1 2022 Plugs and socket-outlets for household and - -
similar purposes - Part 1: General
requirements
IEC 60898 - Electrical accessories - Circuit-breakers for - -
overcurrent protection for household and
similar installations
IEC 60898-1 - Electrical accessories - Circuit-breakers for EN 60898-1 -
overcurrent protection for household and
similar installations - Part 1: Circuit-breakers
for a.c. operation
IEC 60947-2 - Low-voltage switchgear and controlgear - EN 60947-2 -
Part 2: Circuit-breakers
IEC 60947-3 2020 Low-voltage switchgear and controlgear - EN IEC 60947-3 2021
Part 3: Switches, disconnectors, switch-
disconnectors and fuse-combination units
IEC 60947-4-1 2018 Low-voltage switchgear and controlgear - EN IEC 60947-4-1 2019
Part 4-1: Contactors and motor-starters -
Electromechanical contactors and motor-
starters
IEC 60947-6-2 2020 Low-voltage switchgear and controlgear - EN IEC 60947-6-2 2023
Part 6-2: Multiple function equipment -
Control and protective switching devices (or
equipment) (CPS)
IEC 60950-1 2005 Information technology equipment - Safety - - -
Part 1: General requirements
+ A1 2009 - -
+ A2 2013 - -
IEC 61180 2016 High-voltage test techniques for low-voltage EN 61180 2016
equipment - Definitions, test and procedure
requirements, test equipment
IEC 61439-7 2022 Low-voltage switchgear and controlgear - -
assemblies - Part 7: Assemblies for specific
applications such as marinas, camping sites,
market squares, electric vehicle charging
stations
IEC 61558-2-6 - Safety of transformers, reactors, power EN IEC 61558-2-6 -
supply units and combinations thereof - Part
2-6: Particular requirements and tests for
safety isolating transformers and power
supply units incorporating safety isolating
transformers for general applications
IEC 61810-1 - Electromechanical elementary relays - Part EN 61810-1 -
1: General and safety requirements

To be published. Stage at the time of publication: FprEN IEC 61558-2-6:2021.
Publication Year Title EN/HD Year
IEC 61851-1 2017 Electric vehicle conductive charging system EN IEC 61851-1 2019
- Part 1: General requirements
IEC 61851-3 series Electric vehicle conductive charging system EN 61851-3 series
- Part 3: DC EV supply equipment where
protection relies on double or reinforced
insulation
IEC/TS 61851-3-2 2023 Electric vehicle conductive charging system - -
- Part 3-2: DC EV supply equipment where
protection relies on double or reinforced
insulation - Particular requirements for
portable and mobile equipment
IEC/TS 61851-3-4 2023 Electric vehicles conductive charging system - -
- Part 3-4: DC EV supply equipment where
protection relies on double or reinforced
insulation - General definitions and
requirements for CANopen communication
IEC/TS 61851-3-5 2023 Electric vehicles conductive charging system - -
- Part 3-5: DC EV supply equipment where
protection relies on double or reinforced
insulation - Pre-defined communication
parameters and general application objects
IEC 62262 - Degrees of protection provided by EN 62262 -
enclosures for electrical equipment against
external mechanical impacts (IK code)
IEC 62196-1 2022 Plugs, socket-outlets, vehicle connectors EN IEC 62196-1 2022
and vehicle inlets - Conductive charging of
electric vehicles - Part 1: General
requirements
IEC/TS 62196-4 2022 Plugs, socket-outlets, vehicle connectors - -
and vehicle inlets - Conductive charging of
electric vehicles - Part 4: Dimensional
compatibility and interchangeability
requirements for DC pin and contact-tube
accessories for Class II or Class III
applications
IEC 62477-1 2022 Safety requirements for power electronic - -
converter systems and equipment - Part 1:
General
IEC/PAS 62840-3 2021 Electric vehicle battery swap system - Part - -
3: Particular safety and interoperability
requirements for battery swap systems
operating with removable RESS/battery
systems
ISO 11898-1 2015 Road vehicles - Controller area network - -
(CAN) - Part 1: Data link layer and physical
signalling
EN 50325-4 2002
EN 50604-1 2016
+ A1 2021
IEC TS 61851-3-1 ®
Edition 1.0 2023-07
TECHNICAL
SPECIFICATION
Electric vehicle conductive charging system –

Part 3-1: DC EV supply equipment where protection relies on double or

reinforced insulation – General rules and requirements for stationary equipment

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 43.120 ISBN 978-2-8322-7073-8

– 2 – IEC TS 61851-3-1:2023 © IEC 2023
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 9
3 Terms and definitions . 11
3.1 Electric supply equipment . 12
3.2 Insulation . 13
3.3 Functions . 14
3.4 Vehicle . 15
3.5 Cords, cables and connection means . 16
4 Symbols and abbreviated terms . 18
5 General requirements . 18
6 Classification . 19
6.1 Characteristics of supply network . 19
6.2 Method of connection . 19
6.3 Normal environmental conditions . 20
6.4 Special environmental conditions . 20
6.5 Access . 20
6.6 Mounting method . 20
6.7 EV supply system configuration . 20
7 General EV supply system requirements . 22
7.1 EV supply system requirements . 22
7.1.1 General . 22
7.1.2 EV supply system configuration type A . 23
7.1.3 EV supply system configuration type B . 23
7.1.4 EV supply system configuration type C . 23
7.1.5 EV supply system configuration type D . 23
7.1.6 EV supply system configuration type E . 23
7.1.7 EV supply system configuration type F . 23
7.1.8 Conversion device . 24
7.2 Voltages and currents . 24
7.2.1 Rated voltages and currents . 24
7.2.2 Current and voltage regulation . 24
7.2.3 AUX supply circuit . 25
7.3 Functions provided. 26
7.3.1 Mandatory functions for power transfer . 26
7.3.2 Optional functions for power transfer . 26
7.3.3 Objects for compatibility check . 26
7.4 Requirements for AC/DC or DC/DC VCU for stationery DRI EV supply
equipment . 27
7.4.1 General . 27
7.4.2 Built-in AC/DC VCU for stationary DRI EV supply equipment . 27
7.4.3 Built-in DC/DC VCU for stationary DRI EV supply equipment . 27
7.4.4 Protection against access to live parts of built-in VCUs . 27
8 Communications . 28
8.1 Command and control communication (mandatory) . 28

IEC TS 61851-3-1:2023 © IEC 2023 – 3 –
8.2 Optional communication . 28
8.3 Communication circuit from the DRI EV supply equipment to the
telecommunication networks . 28
9 Protection against electric shock . 28
9.1 Protection against direct contact . 28
9.1.1 General . 28
9.1.2 IP ratings for protection against electric shock . 29
9.2 Stored energy – Discharge of capacitors . 29
9.2.1 Disconnection of plug connected EV supply equipment . 29
9.2.2 Loss of supply voltage to permanently connected EV supply equipment . 29
9.3 Fault protection . 30
9.4 DC leakage currents . 30
9.5 Y capacitors . 30
10 Specific requirements for accessories . 30
10.1 General requirements . 30
10.2 Adaptors . 30
10.3 Latching device . 30
10.4 Contact sequencing of accessories . 31
11 Cable assembly requirements . 31
11.1 General . 31
11.2 Electrical rating . 31
11.3 Mechanical characteristics . 31
11.4 Storage means for case C . 32
11.5 Strain relief . 32
12 DRI EV supply equipment constructional requirements and tests . 32
12.1 Characteristics of mechanical switching devices . 32
12.1.1 General . 32
12.1.2 Switch and switch-disconnector . 32
12.1.3 Contactor . 32
12.1.4 Circuit-breaker . 32
12.1.5 Relays . 33
12.1.6 Switch-on peak current . 33
12.2 Clearances and creepage distances . 33
12.3 IP degrees . 34
12.3.1 Degrees of protection against solid foreign objects and water for the
enclosure . 34
12.3.2 Degrees of protection against solid foreign objects and water for
accessories . 34
12.4 Insulation resistance . 34
12.5 Touch current . 35
12.6 Dielectric withstand voltage . 35
12.6.1 AC withstand voltage . 35
12.6.2 Impulse dielectric withstand (1,2/50 µs) . 36
12.7 Temperature rise . 36
12.8 Damp heat functional test . 36
12.9 Minimum temperature functional test . 36
12.10 Mechanical strength . 37
13 Overload and short-circuit protection . 37
14 Emergency switching or disconnect (optional) . 37

– 4 – IEC TS 61851-3-1:2023 © IEC 2023
15 Marking and instructions . 38
15.1 Installation manual . 38
15.2 User manual (instructions) for DRI EV supply equipment . 38
15.3 Marking of DRI EV supply equipment type A to type F . 39
15.4 Marking of cable assemblies type C and type E . 39
15.5 Durability test for marking . 39
Annex A (informative) Acoustical and optical signalling . 41
A.1 General . 41
A.2 Optical signalling . 41
A.3 Acoustical signalling . 41
Annex B (informative) Example of position for socket outlets . 42
Annex C (informative) Conversion device . 44
C.1 General . 44
C.2 Consideration on how to connect a manufacturer specific EV/RESS to a DRI
EV supply equipment . 44
Annex D (informative) Examples of VCU wirings . 45
D.1 Built-in AC/DC VCU for stationary DRI EV supply equipment . 45
D.2 Built-in DC/DC VCU for stationary DRI EV supply equipment . 46
Bibliography . 47

Figure 1 – EV supply system configuration. 21
Figure B.1 – Example of position of the socket-outlet overview . 42
Figure B.2 – Example of position of the socket-outlet details . 43
Figure D.1 – Built-in AC/DC VCU for stationary DRI EV supply equipment, design 1,
+60 V, –120 V output . 45
Figure D.2 – Built-in AC/DC VCU for stationary DRI EV supply equipment, design 2,
+60 V or –120 V output . 46
Figure D.3 – Built-in DC/DC VCU for stationary DRI EV supply equipment: 60 V to 400
V DC (side A), –120 V, +60 V output (side B) . 46

Table 1 – Corresponding type designations to ISO 18246 . 22
Table 2 – Rated system input voltages . 24
Table 3 – System output voltages class . 24
Table 4 – IP ratings . 29
Table 5 – Touch current limits . 35

IEC TS 61851-3-1:2023 © IEC 2023 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRIC VEHICLE CONDUCTIVE CHARGING SYSTEM –

Part 3-1: DC EV supply equipment where protection relies
on double or reinforced insulation – General rules
and requirements for stationary equipment

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.
IEC TS 61851-3-1 has been prepared by IEC technical committee 69: Electrical power/energy
transfer systems for electrically propelled road vehicles and industrial trucks. It is a Technical
Specification.
The text of this Technical Specification is based on the following documents:
Draft Report on voting
69/845/DTS 69/882/RVDTS
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this Technical Specification is English.

– 6 – IEC TS 61851-3-1:2023 © IEC 2023
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
In this document, the following print types are used:
– requirements: in roman type;
– test specifications: in italic type;
– notes: in small roman type.
A list of all parts in the IEC 61851 all parts, published under the general title Electric vehicles
conductive charging system, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under 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.
IEC TS 61851-3-1:2023 © IEC 2023 – 7 –
INTRODUCTION
This document is published in separate parts according to the following structure:
IEC TS 61851-3-1, Electric vehicle conductive charging system – Part 3-1: DC EV supply
equipment where protection relies on double or reinforced insulation – General rules and
requirements for stationary equipment
IEC TS 61851-3-2, Electric vehicle conductive charging system – Part 3-2: DC EV supply
equipment where protection relies on double or reinforced insulation – Particular requirements
for portable and mobile equipment
IEC TS 61851-3-4, Electric vehicle conductive charging system – Part 3-4: DC EV supply
equipment where protection relies on double or reinforced insulation – General definitions and
requirements for CANopen communication
IEC TS 61851-3-5, Electric vehicle conductive charging system – Part 3-5: DC EV supply
equipment where protection relies on double or reinforced insulation – Pre-defined
communication parameters and general application objects
IEC TS 61851-3-6, Electric vehicle conductive charging system – Part 3-6: DC EV supply
equipment where protection relies on double or reinforced insulation – Voltage converter unit
communication
IEC TS 61851-3-7, Electric vehicle conductive charging system – Part 3-7: DC EV supply
equipment where protection relies on double or reinforced insulation – Battery system
communication
– 8 – IEC TS 61851-3-1:2023 © IEC 2023
ELECTRIC VEHICLE CONDUCTIVE CHARGING SYSTEM –

Part 3-1: DC EV supply equipment where protection relies
on double or reinforced insulation – General rules
and requirements for stationary equipment

1 Scope
This part of IEC 61851, which is a Technical Specification, applies to the equipment, including
stationary equipment
• for the conductive transfer of electric power between the supply network and
– an electric road vehicle, or
– a removable rechargeable energy storage system (RESS), or
– an on-board RESS of an electric road vehicle,
• when the equipment is connected to the supply network having a supply voltage up to 480 V
AC or up to 400 V DC and a rated output voltage up to 120 V DC, and
• where the protection against electric shock relies on double or reinforced insulation, and
with double or reinforced insulation between all AC and DC inputs and outputs.
NOTE 1 In the following countries, the acceptable nominal supply voltage is up to 600 V AC: CA, US.
Particular requirements for portable and mobile DRI EV supply equipment are covered by
IEC TS 61851-3-2023.
Equipment for the conductive transfer of electric power between the supply network and an
electric road vehicle/RESS according to the IEC TS 61851-3 series is intended to be connected
to vehicles where the vehicle power supply circuit is protected against electric shock by double
or reinforced insulation.
NOTE 2 For information regarding protection against electric shock by double or reinforced insulation of the EV or
of the vehicle power supply circuit, see ISO 18246:2023, 6.1.1 b) and Table 3.
Requirements for bidirectional energy transfer DC to AC are under consideration and are not
part of this document.
This document also applies to EV supply equipment supplied from on-site storage systems (e.g.
buffer batteries).
This document applies to VCUs intended to be a part of DRI EV supply equipment specified in
this document.
This document applies to equipment for the conductive transfer of electric power between the
supply network and an electric road vehicle/RESS intended to be installed and/or used at an
altitude of up to 2 000 m.
The aspects covered in this document include
• the connection to the vehicle,
• characteristics to be complied with by the vehicle with respect to the AC or DC,
• the specification for required level of electrical safety for the double or reinforced insulated
(DRI) EV supply equipment,
IEC TS 61851-3-1:2023 © IEC 2023 – 9 –
• operators and third-party electrical safety,
• requirements for command and control communication for safety and process matters, if
required,
• requirements for bidirectional power transfer DC to DC, and
• the connection to installations according to IEC 60364-7-722.
NOTE 3 In the following countries, electrical installation codes other than those from IEC 60364-7-722 are used:
CA, US.
Equipment covered by this document is not intended to be located in hazardous areas where
flammable gas or vapour and/or combustible materials, fuels or other combustible or explosive
materials are present. Additional requirements can apply to these locations.
This document does not apply to
• aspects related to maintenance,
• electrical devices and components, which are covered by their specific product standards,
• trolley buses and rail vehicles,
• vehicle power supply circuit, which is covered by ISO 18246, and
• EMC requirements for on-board equipment while connected to the supply, which are covered
by IEC 61851-21-1.
2 Normative references
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:
IEC 60038, IEC standard voltages
IEC 60068-2-1:2007, Environmental testing – Part 2-1: Tests – Test A: Cold
IEC 60068-2-11:2021, Environmental testing – Part 2-11: Tests – Test Ka: Salt mist
IEC 60068-2-30:2005, Environmental testing – Part 2-30: Tests – Test Db: Damp heat, cyclic
(12 h + 12 h cycle)
IEC 60068-2-78:2012, Environmental testing – Part 2-78: Tests – Test Cab: Damp heat, steady
state
IEC 60269 (all parts), Low-voltage fuses
IEC 60309-2:2021, Plugs, fixed or portable socket-outlets and appliance inlets for industrial
purposes – Part 2: Dimensional compatibility requirements for pin and contact-tube accessories
IEC 60320 (all parts), Appliance couplers for household and similar general purposes
IEC 60335-1:2020, Household and similar electrical appliances – Safety – Part 1: General
requirements
IEC 60364-4-41:2005, Low-voltage electrical installations – Part 4-41: Protection for safety –
Protection against electric shock
IEC 60364-4-41:2005/AMD1:2017
– 10 – IEC TS 61851-3-1:2023 © IEC 2023
IEC 60364-7-722:2018, Low-voltage electrical installations – Part 7-722: Requirements for
special installations or locations – Supplies for electric vehicles
IEC 60529, Degrees of protection provided by enclosures (IP Code)
IEC 60664-1:2020, Insulation coordination for equipment within low-voltage systems – Part 1:
Principles, requirements and tests
IEC 60884-1:2022, Plugs and socket-outlets for household and similar purposes – Part 2:
General requirements
IEC 60898 (all parts), Electrical accessories – Circuit-breakers for overcurrent protection for
household and similar installations
IEC 60898-1, Electrical accessories – Circuit-breakers for overcurrent protection for household
and similar installations – Part 1: Circuit-breakers for a.c. operation
IEC 60947-2, Low-voltage switchgear and controlgear – Part 2: Circuit-breakers
IEC 60947-3:2020, Low-voltage switchgear and controlgear – Part 3: Switches, disconnectors,
switch-disconnectors and fuse-combination units
IEC 60947-4-1:2018, Low-voltage switchgear and controlgear – Part 4-1: Contactors and motor-
starters – Electromechanical contactors and motor-starters
IEC 60947-6-2, Low-voltage switchgear and controlgear – Part 6-2: Multiple function equipment
– Control and protective switching devices (or equipment) (CPS)
IEC 60950-1:2005, Information technology equipment – Safety – Part 1: General requirements
IEC 60950-1:2005/AMD1:2009
IEC 60950-1:2005/AMD2:2013
IEC 60990:2016, Methods of measurement of touch current and protective conductor current
IEC 61009-1:2010, Residual current operated circuit-breakers with integral overcurrent
protection for household and similar uses (RCBOs) – Part 1: General rules
IEC 61009-1:2010/AMD1:2012
IEC 61009-1:2010/AMD2:2013
IEC 61180:2016, High-voltage test techniques for low-voltage equipment – Definitions, te
...