SIST EN IEC 61851-23-1:2026

SLOVENSKI STANDARD
01-oktober-2026
Sistem kabelskega napajanja električnih vozil - 23-1. del: Oprema za napajanje
električnih vozil z enosmernim tokom - Avtomatski sklopni sistem (IEC 61851-23-
1:2026)
Electric vehicle conductive charging system - Part 23-1: DC electric vehicle supply
equipment - Automated connection device (IEC 61851-23-1:2026)
Konduktive Ladesysteme für Elektrofahrzeuge – Teil 23-1: Gleichstromladen mit einer
automatischen Kontaktvorrichtung (IEC 61851-23-1:2026)
Système de charge par conduction pour véhicules électriques - Partie 23-1: Système
d'alimentation en courant continu pour véhicules électriques - Dispositif de connexion
automatique (IEC 61851-23-1:2026)
Ta slovenski standard je istoveten z: EN IEC 61851-23-1:2026
ICS:
43.120 Električna cestna vozila Electric road vehicles
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 61851-23-1

NORME EUROPÉENNE
EUROPÄISCHE NORM August 2026
ICS 43.120
English Version
Electric vehicle conductive charging system - Part 23-1: DC
electric vehicle supply equipment - Automated connection device
(IEC 61851-23-1:2026)
Système de charge par conduction pour véhicules Konduktive Ladesysteme für Elektrofahrzeuge - Teil 23-1:
électriques - Partie 23-1: Système d'alimentation en courant Gleichstromversorgungseinrichtungen für Elektrofahrzeuge
continu pour véhicules électriques - Dispositif de connexion - Automatische Anschlussvorrichtung
automatique (IEC 61851-23-1:2026)
(IEC 61851-23-1:2026)
This European Standard was approved by CENELEC on 2026-07-23. 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,
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
© 2026 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61851-23-1:2026 E

European foreword
The text of document 69/1127/FDIS, future edition 1 of IEC 61851-23-1, prepared by 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 61851-23-
1:2026.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2027-08-31
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2029-08-31
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.
This document is read in conjunction with EN IEC 61851-23:2026 and EN IEC 61851-1:2019.
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 Standard IEC 61851-23-1:2026 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 standard indicated:
IEC 61140:2016 NOTE Approved as EN 61140:2016 (not modified)
IEC 61496-1:2020 NOTE Approved as EN IEC 61496-1:2020 (not modified)
IEC 61643-41:2025 NOTE Approved as EN IEC 61643-41:2025 (not modified) + A11:2025
IEC 61851-21-2:2018 NOTE Approved as EN IEC 61851-21-2:2021 (not modified)
IEC 62196-2 NOTE Approved as EN IEC 62196-2
IEC 62196-3:2022 NOTE Approved as EN IEC 62196-3:2022 (not modified)
IEC 62305 (series) NOTE Approved as EN IEC 62305 (series)
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 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 60364-5-53 2019 Low-voltage electrical installations -- Part 5- HD 60364-5-53 2022
53: Selection and erection of electrical
equipment - Protection, isolation, switching,
control and monitoring
+ AMD 2 2024 - -
IEC 60479-1 2018 Effects of current on human beings and - -
livestock - Part 1: General aspects
IEC 60479-2 2019 Effects of current on human beings and - -
livestock - Part 2: Special aspects
IEC 60529 - Degrees of protection provided by enclosures EN 60529 -
(IP Code)
IEC 61496 series Safety of machinery - Electro-sensitive EN IEC 61496 series
protective equipment
IEC 61643 series Low-voltage surge protective devices EN 61643 series
IEC 61643-11 - Low-voltage surge protective devices - Part EN IEC 61643-11 -
11: Surge protective devices connected to
AC low-voltage power systems -
Requirements and test methods
IEC 61643-21 - Low voltage surge protective devices - Part EN IEC 61643-21 -
21: Surge protective devices connected to
telecommunications and signalling networks -
Requirements and test methods
IEC 61851-1 2017 Electric vehicle conductive charging system - EN IEC 61851-1 2019
Part 1: General requirements
Publication Year Title EN/HD Year
IEC 61851-23 2023 Electric vehicle conductive charging system - EN IEC 61851-23 2026
Part 23: DC electric vehicle supply equipment
IEC 61851-24 2023 Electric vehicle conductive charging system - EN IEC 61851-24 2024
Part 24: Digital communication between a DC
EV supply equipment and an electric vehicle
for control of DC charging
IEC 62368-1 2023 Audio/video, information and communication EN IEC 62368-1 2024
technology equipment - Part 1: Safety
requirements
ISO 5474-3 2024 Electrically propelled road vehicles - - -
Functional and safety requirements for power
transfer between vehicle and external electric
circuit - Part 3: DC power transfer
ISO 6469-3 2021 Electrically propelled road vehicles - Safety - -
specifications - Part 3: Electrical safety

IEC 61851-23-1 ®
Edition 1.0 2026-06
INTERNATIONAL
STANDARD
Electric vehicle conductive charging system -
Part 23-1: DC electric vehicle supply equipment - Automated connection device
ICS 43.120  ISBN 978-2-8327-1251-1

IEC 61851-23-1:2026-06(en)
IEC 61851-23-1:2026 © IEC 2026
CONTENTS
FOREWORD . 5
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 9
3 Terms and definitions . 10
4 General requirements. 13
5 Classification . 13
6 Charging modes and functions . 14
7 Communications . 17
8 Protection against electric shock . 18
9 Conductive electrical interface requirements. 27
10 Requirements for adaptors . 28
11 Cable assembly requirements . 28
12 EV supply equipment constructional requirements and tests . 28
13 Overload and short circuit protection . 31
14 Automatic reclosing of protective devices . 31
15 Emergency switching or disconnect (optional). 31
16 Marking and instructions. 31
Annex AA (normative) EV supply equipment of system A . 37
Annex BB (normative) EV supply equipment of system B . 38
Annex CC (normative) EV supply equipment of system C . 54
Annex DD (informative) Bidirectional power transfer control . 91
Annex EE (normative) Test load impedance verification . 92
Annex FF (normative) Multi-side B separated EV supply equipment . 93
Annex GG (informative) Communication and energy transfer process between the EV
supply equipment and the EV . 94
Annex HH (informative) Touch current and touch impulse current . 95
Annex AAA (informative) Consideration when road vehicle is interconnected with an
off-board charger . 98
Annex BBB (normative) DC EV supply equipment based on system C with 3 contacts

automatic coupler . 100
Bibliography . 141

Figure 201 – Case D connection . 11
Figure 202 – Case E connection . 11
Figure 203 – Measurement of the touch leakage current . 20
Figure 204 – Minimum clearances to accessible live parts . 22
Figure 205 – Protection by obstacles . 22
Figure 206 – Protection by obstacles test method with the jointed test finger mounted
on a straight stick . 23
Figure 207 – Jointed test finger mounted on a straight stick . 23
Figure 208 – Protection by electro-sensitive equipment . 24
IEC 61851-23-1:2026 © IEC 2026
Figure 209 – Example of an SPD-assembly having one voltage switching type SPD
between side B live conductors (DC+/DC−) and protective conductor . 30
Figure 210 – Hazardous voltage symbol according to ISO 7010-W012:2011-05 . 32
Figure 211 – General test setup for system C with an automated connection device . 34
Figure BB.201 – Circuit diagram of a system B EV supply equipment with automatic
coupler . 39
Figure BB.202 – Control pilot . 40
Figure BB.203 – U state diagram for typical control pilot . 42
cp
Figure BB.204 – FPT control sequence . 44
Figure BB.205 – EVSE terminates energy transfer sequence . 50
Figure BB.206 – EV terminates energy transfer sequence . 51
Figure CC.201 – Recommended control pilot circuit for case D ACD . 55
Figure CC.202 – Circuit diagram of a system C EV supply equipment with automatic
coupler . 56
Figure CC.203 – Example of a sequence diagram . 59
Figure CC.204 – Sequence diagram for normal start up . 60
Figure CC.205 – Sequence diagram for normal shutdown . 64
Figure CC.206 – Sequence diagram for emergency shutdown executed by the EV –
case D . 68
Figure CC.207 – Sequence diagram for emergency shutdown executed by the EV
supply equipment . 70
Figure HH.201 – Leakage current and impulse current in relation to limits in IEC 60479
series . 97
Figure AAA.1 – Hazardous voltage logo according to ISO 7010-W012:2011-05 . 99
Figure BBB.1 – Vehicle/infrastructure communication . 101
Figure BBB.2 – Power distribution architecture . 101
Figure BBB.3 – Power distribution architecture . 102
Figure BBB.4 – Upstream radio signal modulation oscillograms . 104
Figure BBB.5 – 12-bit frame after demodulation . 105
Figure BBB.6 – CP radio signal modulation oscillograms . 107
Figure BBB.7 – 8-bit frame after demodulation . 107
Figure BBB.8 – Sequence diagram for normal start up . 110
Figure BBB.9 – Sequence diagram for normal shutdown . 113
Figure BBB.10 – Sequence diagram for emergency stop initiated by EVSE. 116
Figure BBB.11 – Sequence diagram for emergency stop initiated by EVSE. 118
Figure BBB.12 – Sequence diagram for emergency stop initiated by EV . 120
Figure BBB.13 – 38 kHz radio signal emission . 139

Table 103 – Voltage threshold for emergency shutdown reaction for system B and
system C . 15
Table 201 – Voltage threshold for emergency shutdown reaction for system B and
system C . 15
Table 112 – Safety provisions for protection against electric shock for EV supply
equipment at side B . 25
Table 202 – Safety provisions for protection against electric shock for EV supply
equipment at side B . 25
IEC 61851-23-1:2026 © IEC 2026
Table 118 – Current ripple limit of DC EV supply equipment . 32
Table 203 – Current ripple limit of DC EV supply equipment . 32
Table 120 – Recommended circuit parameters of the test load . 35
Table 204 – Recommended circuit parameters of the test load . 35
Table BB.201 – Definition of symbols of circuit diagram . 39
Table BB.202 – Control pilot circuit values and parameters . 41
Table BB.203 – U states detected by the EV supply equipment . 41
cp
Table BB.204 – List of U states transition sequence . 42
cp
Table BB.2 – Error shutdown times and criteria . 45
Table BB.3 – Emergency shutdown times and criteria . 46
Table BB.4 – Sequence description . 52
Table CC.201 – Component values and tolerances for automatic coupler . 57
Table CC.202 – Message code mapping for sequence diagram . 58
Table CC.203 – Example of a sequence description . 59
Table CC.204 – Sequence description for normal start up . 61
Table CC.205 – Sequence description for normal shutdown . 65
Table CC.206 – Overview of error and emergency shutdown cases . 66
Table CC.207 – Sequence description for emergency shutdown executed by the EV –
case D . 69
Table CC.208 – Sequence description for emergency shutdown executed by the EV
supply equipment . 71
Table CC.18 – Insulation states and DC EV supply equipment reaction based on the
measured insulation resistance . 74
Table CC.209 – Insulation states and DC EV supply equipment reaction based on the
measured insulation resistance . 74
Table CC.210 – Emergency shutdown timing parameters . 75
Table CC.23 – Component valued for the inrush current limit test . 83
Table CC.211 – Component valued for the inrush current limit test . 83
Table HH.1 – Key(s) and exemplary values for design verification . 95
Table HH.201 –Exemplary determination if touch current limit is fulfilled by design. 95
Table BBB.1 – Definition and symbols/terms . 102
Table BBB.2 – ACD counterpart to ACD signal modulation description . 104
Table BBB.3 – Radio signal data bits allocation . 104
Table BBB.4 – CP signal modulation description . 107
Table BBB.5 – Message mapping for sequence diagram. 108
Table BBB.6 – Example of a sequence description. 109
Table BBB.7 – Sequence description for normal start up . 111
Table BBB.8 – Sequence description for normal shutdown . 114
Table BBB.9 – Overview of error and emergency shutdown cases . 115
Table BBB.10 – Sequence description for emergency stop initiated by EVSE . 117
Table BBB.11 – Sequence description for emergency stop initiated by EVSE . 119
Table BBB.12 – Sequence description for emergency stop initiated by EV . 121
Table CC.18 – Insulation states and DC EV supply equipment reaction based on the
measured insulation resistance . 123
IEC 61851-23-1:2026 © IEC 2026
Table BBB.13 – Insulation states and DC EV supply equipment reaction based on the
measured insulation resistance . 123
Table BBB.14 – Emergency shutdown timing parameters . 124
Table CC.23 – Component valued for the inrush current limit test . 132

IEC 61851-23-1:2026 © IEC 2026
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Electric vehicle conductive charging system -
Part 23-1: DC electric vehicle supply equipment -
Automated connection device
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) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
may be required to implement this document. However, implementers are cautioned that this may not represent
the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
IEC 61851-23-1 has been prepared by IEC technical committee 69: Electric power/energy
transfer systems for electrically propelled road vehicles and industrial trucks. It is an
International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
69/1127/FDIS 69/1133/RVD
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 International Standard is English.
IEC 61851-23-1:2026 © IEC 2026
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.
This document is to be read in conjunction with IEC 61851-23:2023 and IEC 61851-1:2017.
The clauses of particular requirements in this document supplement or modify the
corresponding clauses in IEC 61851-23:2023 and IEC 61851-1:2017. Where the text of
subsequent clauses indicates an "addition", an "amendment" to or a "replacement" of the
relevant requirement, test specification or explanation of IEC 61851-23:2023 or
IEC 61851-1:2017, these changes are made to the relevant text of IEC 61851-23:2023 or
IEC 61851-1:2017, which then becomes part of this document. Where no change is necessary,
the words " IEC 61851-23:2023, [clause], is applicable " are used. The new clauses which are
not included in IEC 61851-23:2023 have a clause number starting from 201, for example 3.201,
201.2, etc. Replaced tables and figures are numbered starting from 201. The new annexes of
this document are numbered using triple-alphabet, for example Annex AAA to avoid confusion
with the annexes of IEC 61851-23:2023. If the text in this document is to be read with
IEC 61851-23:2023 and IEC 61851-1:2017, the following terms are replaced:
– "vehicle coupler", as defined by IEC 61851-1:2017, with "automatic coupler" as defined in
Clause 3,
– "vehicle connector", as defined by IEC 61851-1:2017, with "part of the automatic coupler
mounted on the EV supply equipment", and
– "vehicle inlet", as defined by IEC 61851-1:2017, with "part of the automatic coupler mounted
on the EV".
In this document, the following print types are used:
– test specifications: italic type.
– notes: smaller roman type.
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.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under https://webstore.iec.ch/?ref=menu in the data
related to the specific document. At this date, the document will be
– reconfirmed,
– withdrawn, or
– revised.
IEC 61851-23-1:2026 © IEC 2026
INTRODUCTION
The introduction and commercialisation of electric vehicles have been accelerated in the global
market, responding to the global concerns on CO reduction and energy security. Concurrently,
the development of charging infrastructure for electric vehicles has also been expanding. As a
complement to the DC EV supply equipment with a vehicle connector, DC supply equipment
using an automated connection device is recognized as an alternative solution for electric
vehicles, for example buses and trucks.
The international standardization of charging infrastructure with an automated connection
device is indispensable for the diffusion of electric vehicles, and this document is developed for
the manufacturers' convenience by providing general and basic requirements for DC EV supply
equipment using an automatic conductive connection to the vehicle.

IEC 61851-23-1:2026 © IEC 2026
1 Scope
This part of IEC 61851 provides the requirements for DC EV supply equipment with an
automated connection device (ACD) for conductive connection to the vehicle, with a rated
maximum voltage at side A of up to 1 000 V AC or up to 1 500 V DC and a rated maximum
voltage at side B up to 1 500 V DC.
NOTE 1 This document includes information on EV for conductive connection but limited to the necessary content
for describing the power and signalling interface.
This document specifies the DC EV supply equipment with an automated connection device
based on
– system B described in IEC 61851-23:2023, Annex BB, and
– system C described in IEC 61851-23:2023, Annex CC.
The requirements for reverse power transfer (RPT) and bidirectional power transfer (BPT) are
under consideration and are not specified in this document.
EMC requirements for DC EV supply equipment are defined in IEC 61851-21-2:2018.
This document provides the general requirements for the control communication between a DC
EV supply equipment and an EV.
The requirements for digital communication between DC EV supply equipment and electric
vehicle for control of DC energy transfer are defined in ISO 15118-20:2022 and
IEC 61851-24:2023.
This document only applies to automatic couplers of category 2, i.e. using an electro-
mechanical interface: automatic coupler for an automated charging system according to
IEC 63407.
This document does not apply to automatic coupler of category 1 as described in
IEC TS 61851-27.
This document does not apply to automatic coupler of category 3 as described in
IEC TS 61851-26.
This document does not cover all safety aspects related to maintenance.
Requirements for systems not providing simple separation or protective separation between
side A and side B are under consideration.
Requirements for EV supply equipment without control of current, voltage or power are under
consideration.
EV supply equipment in compliance with this document are not intended to provide energy
transfer to a single EV with
– multiple vehicle connectors of the same EV supply equipment, or
– multiple EV supply equipment.
NOTE 2 Requirements for EVs mated to an EV supply equipment are specified in the ISO 5474 series.
IEC 61851-23-1:2026 © IEC 2026
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 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
IEC 60364-5-53:2019, Low-voltage electrical installations - Part 5-53: Selection and erection of
electrical equipment - Devices for protection for safety, isolation, switching, control and
monitoring
IEC 60364-5-53:2019/AMD2:2024
IEC 60479-1:2018, Effects of current on human beings and livestock - Part 1: General aspects
IEC 60479-2:2019, Effects of current on human beings and livestock - Part 2: Special aspects
IEC 60529, Degrees of protection provided by enclosures (IP Code)
IEC 61496 (all parts), Safety of machinery - Electro-sensitive protective equipment
IEC 61643 (all parts), Low-voltage surge protective devices
IEC 61643-11, Low-voltage surge protective devices - Part 11: Surge protective devices
connected to low-voltage power systems - Requirements and test methods
IEC 61643-21, Low voltage surge protective devices - Part 21: Surge protective devices
connected to telecommunications and signalling networks - Requirements and testing methods
IEC 61851-1:2017, Electric vehicle conductive charging system - Part 1: General requirements
IEC 61851-23:2023, Electric vehicle conductive charging system - Part 23: DC electric vehicle
supply equipment
IEC 61851-24:2023, Electric vehicle conductive charging system - Part 24: Digital
communication between a DC EV supply equipment and an electric vehicle for control of DC
charging
IEC 62368-1:2023, Audio/video, information and communication technology equipment -
Part 1:Safety requirements IEC 63407:—, Conductive charging of electric vehicles - Contact
interface for automated connection device (ACD)
ISO 5474-3:2024, Electrically propelled road vehicles - Functional and safety requirements for
power transfer between vehicle and external electric circuit - Part 3 DC power transfer
ISO 6469-3:2021, Electrically propelled road vehicles - Safety specifications - Part 3: Electrical
safety
___________
Under preparation. Stage at the time of publication: IEC/ACDV 63407:2025.
IEC 61851-23-1:2026 © IEC 2026
ISO 7010, Graphical symbols - Safety colours and safety signs - Registered safety signs,
available at https://www.iso.org/obp
ISO 13849-1, Safety of machinery - Safety-related parts of control systems - Part 1: General
principles for design
ISO 13850, Safety of machinery - Emergency stop function - Principles for design
ISO 13855, Safety of machinery - Positioning of safeguards with respect to the approach
speeds of parts of the human body
ISO 15118-2:2014, Road vehicles - Vehicle-to-grid communication interface - Part 2: Network
and application protocol requirements
ISO 15118-3:2015, Road vehicles - Vehicle to grid communication interface - Part 3: Physical
and data link layer requirements
ISO 15118-8:2020, Road vehicles - Vehicle to grid communication interface - Part 8: Physical
layer and data link layer requirements for wireless communication
nd
ISO 15118-20:2022, Road vehicles - Vehicle to grid communication interface - Part 20: 2
generation network layer and application layer requirements
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 61851-23:2023 apply,
except as follows.
ISO and IEC maintain terminology databases for use in standardization at the following
addresses:
– IEC Electropedia: available at https://www.electropedia.org/
– ISO Online browsing platform: available at https://www.iso.org/obp
3.1
electric supply equipment
Additional terms and definitions:
3.1.201
case D
connection of an EV to a supply network utilizing an automatic coupler which has an ACD on
the EV supply equipment
Note 1 to entry: See Figure 201 for an example of case D connection.
IEC 61851-23-1:2026 © IEC 2026

Key
a automated connection device
b ACD counterpart
c automatic coupler
NOTE The position of the ACD is an example implementation.
Figure 201 – Case D connection
3.1.202
case E
connection of an EV to a supply network utilizing an automatic coupler which has an ACD on
the EV
Note 1 to entry: See Figure 202 for an example of case E connection.

Key
a automated connection device
b ACD counterpart
c automatic coupler
NOTE The position of the ACD is an example implementation.
Figure 202 – Case E connection
IEC 61851-23-1:2026 © IEC 2026
3.1.203
automated connection device
ACD
active device where the physical connection providing an electromechanical interface between
the EV supply equipment and the vehicle is made without user interaction
3.1.204
ACD counterpart
passive device which is used in combination with an ACD to make the physical connection
providing an electromechanical interface between the EV supply equipment and the vehicle
without user interaction
3.1.205
automatic coupler
system comprising an ACD and an ACD counterpart
3.1.206
mechanical disconnection
physical disconnection between ACD and ACD counterpart
3.1.207
ground level automated connection device
glACD
automated connection device located on ground level
3.1.208
electro-sensitive protection equipment
ESPE
assembly of either devices or components, or both working together for protective tripping or
presence-sensing purposes and comprising as a minimum
– a sensing device,
– controlling/monitoring devices, and
– output signal switching devices or a safety-related data interface, or both
Note 1 to entry: The safety-related control system associated with the ESPE, or the ESPE itself, can further include
a secondary switching device, muting functions, stopping performance monitor, etc. (see IEC 61496-1:2020,
Annex A).
Note 2 to entry: A safety-related communication interface can be integrated in the same enclosure as the ESPE.
[SOURCE: IEC 61496-1:2020, 3.5, modified – The expression "and/or" has been clarified in the
definition, and "may" has been replaced with "can" in Note 1 to entry.]
3.1.209
charging device status
state of the ACD:
– home (signal 1: active as defined in IEC 63407): position where the ACD is not engaged
with its counterpart and where safe clearance is present with street and infrastructure;
– moving (signal 1 and signal 2 are inactive): ACD is between home and end position;
– end position (signal 2: active as defined in IEC 63407): position reached when the ACD and
the fixed ACD counterpart have mated and when the physical contact is established, and
energy transfer is allowed.
IEC 61851-23-1:2026 © IEC 2026
3.7 General terms
Additional terms and definitions:
3.7.201
arm's reach
zone of accessibility to touch extending from any point on a surface where persons usually
stand or move about to the limits which a person can reach with the hand, in any direction,
without assistance
[SOURCE: IEC 60050-826:2022, 826-12-19, modified – The note to entry has been deleted.]
3.7.202
EV contactor
contactor of the EV that connect the automatic coupler with the EV DC− bus
3.7.203
EV supply equipment contactor
contactor of the EV supply equipment that connect the automatic coupler with the EV supply
equipment DC− bus
3.7.204
automatic coupler of category 1
ACD using a vehicle connector and a vehicle plug specified within IEC 62196-2, IEC 62196-3
or IEC TS 63379 as specified in IEC TS 61851-27
3.7.205
automatic coupler of category 2
automatic coupler for an automated charging system according to IEC 63407
3.7.206
automatic coupler of category 3
automatic coupler for an automated charging system according to IEC TS 61851-26
Note 1 to entry: IEC TS 61851-26 specifies the use of automatic coupler for both AC and DC charging.
4 General requirements
IEC 61851-23:2023, Clause 4, is applicable.
5 Classification
IEC 61851-23:2023, Clause 5, is applicable except as follows.
Addition:
5.201 Position of the ACD
– case D;
– case E.
IEC 61851-23-1:2026 © IEC 2026
6 Charging modes and functions
IEC 61851-23:2023, Clause 6, is applicable except as follows.
6.3 Functions provided in Mode 4
6.3.1 Mandatory functions in Mode 4
6.3.1.1 General
Replacement:
The EV supply equipment shall supply a DC current or voltage to the EV battery system in
accordance with a EVCC request.
The following functions shall be provided by EV supply equipment:
– continuous continuity checking of the protective conductor according to 6.3.1.2;
– verification that the EV is properly connected to the EV supply equipment according to
6.3.1.3;
– energization of the power supply to the EV according to 6.3.1.4;
– de-energization of the power supply to the EV according to 6.3.1.5;
– maximum allowable current according to 6.3.1.6;
– DC supply for EV according to 6.3.1.101;
– measuring current and voltage according to 6.3.1.102;
– compatibility check according to 6.3.1.104;
– insulation resistance check before energy transfer according to 6.3.1.104;
– protection against overvoltage between DC+ and DC− according to 6.3.1.107;
– control circuit supply integrity according to 6.3.1.108;
– short circuit check before energy transfer according to 6.3.1.109;
– user initiated shutdown according to 6.3.1.109;
– overload protection for parallel conductors (conditional function) according to 6.3.1.111;
– voltage limitation between side B live parts (DC+ and DC−) and protective conductor
according to 6.3.1.111.
– shutdown of EV supply equipment according to 6.3.1.113.
The EV manufacturer should consider the requirements for overvoltage and overcurrent
according to this document and ISO 5474-3.
If the EV supply equipment can supply more than one EV simultaneously, the EV supply
equipment shall provide all functions listed above independently at each vehicle connector.
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