EN IEC 61851-23:2026
(Main)Electric vehicle conductive charging system - Part 23: DC electric vehicle supply equipment
- Abstract
IEC 61851-23:2023 applies to the EV supply equipment to provide energy transfer between the supply network and electric vehicles (EVs), 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. This document specifies the EV supply equipment of system A, system B and system C as defined in Annex AA, Annex BB and Annex CC. Other systems are under consideration. This document provides the requirements for bidirectional power transfer (BPT) EV supply equipment for system A, with a rated maximum voltage at side A up to 1 000 V AC or 1 500 V DC. The requirements for reverse power transfer (RPT) and BPT for system B and system C are under consideration and are not specified in this document. This second edition cancels and replaces the first edition published in 2014. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) the structure has been rearranged according to IEC 61851-1:2017; b) electrical safety requirements in Clause 8 and Clause 12 have been revised based on the requirements in IEC 62477-1 and inspired by the hazard based safety approach of IEC 62368-1; c) test methods for checking conformity to the stated requirements have been mostly added; general provisions for compliance tests have been specified in Clause 102; d) specific requirements and/or information for the following functions have been added: energy transfer with thermal management system (101.2), bi-directional power transfer control (Annex DD), multi- side B separated EV supply equipment (Annex FF), and communication and energy transfer process (Annex GG); e) Annex AA (system A), Annex BB (system B) and Annex CC (system C) have been updated including additions in conjunction with b) and c). This document has been limited to be applicable to system A, system B and system C; f) the former Annex DD and Annex EE have been deleted. A new Annex EE, with the requirements for the artificial test load, has been added. g) a new informative annex for the touch current and the touch impulse current (Annex HH) has been added
- Status
- Published
- Publication Date
- 01-Oct-2026
- Withdrawal Date
- 06-Mar-2022
- Technical Committee
- CLC/TC 69X - Electrical systems for electric road vehicles
- Drafting Committee
- IEC/TC 69 - IEC_TC_69
- Current Stage
- 6060 - Document made available - Publishing
- Start Date
- 02-Oct-2026
- Completion Date
- 02-Oct-2026
Relations
- Effective Date
- 18-Oct-2016
- Effective Date
- 18-Oct-2016
- Effective Date
- 04-Aug-2026
- Effective Date
- 04-Aug-2026
- Effective Date
- 04-Aug-2026
- Effective Date
- 04-Aug-2026
- Effective Date
- 04-Aug-2026
- Effective Date
- 04-Aug-2026
- Refers
EN ISO 2719:2016 - Determination of flash point - Pensky-Martens closed cup method (ISO 2719:2016) - Effective Date
- 04-Aug-2026
- Effective Date
- 04-Aug-2026
- Effective Date
- 04-Aug-2026
- Effective Date
- 04-Aug-2026
- Effective Date
- 04-Aug-2026
- Effective Date
- 04-Aug-2026
- Effective Date
- 04-Aug-2026
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Frequently Asked Questions
EN IEC 61851-23:2026 is a standard published by CLC. Its full title is "Electric vehicle conductive charging system - Part 23: DC electric vehicle supply equipment". This standard covers: IEC 61851-23:2023 applies to the EV supply equipment to provide energy transfer between the supply network and electric vehicles (EVs), 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. This document specifies the EV supply equipment of system A, system B and system C as defined in Annex AA, Annex BB and Annex CC. Other systems are under consideration. This document provides the requirements for bidirectional power transfer (BPT) EV supply equipment for system A, with a rated maximum voltage at side A up to 1 000 V AC or 1 500 V DC. The requirements for reverse power transfer (RPT) and BPT for system B and system C are under consideration and are not specified in this document. This second edition cancels and replaces the first edition published in 2014. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) the structure has been rearranged according to IEC 61851-1:2017; b) electrical safety requirements in Clause 8 and Clause 12 have been revised based on the requirements in IEC 62477-1 and inspired by the hazard based safety approach of IEC 62368-1; c) test methods for checking conformity to the stated requirements have been mostly added; general provisions for compliance tests have been specified in Clause 102; d) specific requirements and/or information for the following functions have been added: energy transfer with thermal management system (101.2), bi-directional power transfer control (Annex DD), multi- side B separated EV supply equipment (Annex FF), and communication and energy transfer process (Annex GG); e) Annex AA (system A), Annex BB (system B) and Annex CC (system C) have been updated including additions in conjunction with b) and c). This document has been limited to be applicable to system A, system B and system C; f) the former Annex DD and Annex EE have been deleted. A new Annex EE, with the requirements for the artificial test load, has been added. g) a new informative annex for the touch current and the touch impulse current (Annex HH) has been added
IEC 61851-23:2023 applies to the EV supply equipment to provide energy transfer between the supply network and electric vehicles (EVs), 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. This document specifies the EV supply equipment of system A, system B and system C as defined in Annex AA, Annex BB and Annex CC. Other systems are under consideration. This document provides the requirements for bidirectional power transfer (BPT) EV supply equipment for system A, with a rated maximum voltage at side A up to 1 000 V AC or 1 500 V DC. The requirements for reverse power transfer (RPT) and BPT for system B and system C are under consideration and are not specified in this document. This second edition cancels and replaces the first edition published in 2014. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) the structure has been rearranged according to IEC 61851-1:2017; b) electrical safety requirements in Clause 8 and Clause 12 have been revised based on the requirements in IEC 62477-1 and inspired by the hazard based safety approach of IEC 62368-1; c) test methods for checking conformity to the stated requirements have been mostly added; general provisions for compliance tests have been specified in Clause 102; d) specific requirements and/or information for the following functions have been added: energy transfer with thermal management system (101.2), bi-directional power transfer control (Annex DD), multi- side B separated EV supply equipment (Annex FF), and communication and energy transfer process (Annex GG); e) Annex AA (system A), Annex BB (system B) and Annex CC (system C) have been updated including additions in conjunction with b) and c). This document has been limited to be applicable to system A, system B and system C; f) the former Annex DD and Annex EE have been deleted. A new Annex EE, with the requirements for the artificial test load, has been added. g) a new informative annex for the touch current and the touch impulse current (Annex HH) has been added
EN IEC 61851-23:2026 is classified under the following ICS (International Classification for Standards) categories: 43.120 - Electric road vehicles. The ICS classification helps identify the subject area and facilitates finding related standards.
EN IEC 61851-23:2026 has the following relationships with other standards: It is inter standard links to EN 61851-23:2014, EN 61851-23:2014/AC:2016-06, EN 62262:2002, EN 60947-2:2017/A1:2020, HD 639 S1:2002, HD 60364-5-54:2011, HD 60364-5-54:2011/A1:2022, EN IEC 60384-14:2023, EN ISO 2719:2016, EN 61009-1:2012/A1:2014, EN 61008-1:2012/A1:2014, IEC TS 62196-3-1:2020, EN 61008-1:2012/A2:2014, IEC 60245-1:2003/AMD1:2007, EN IEC 61643-21:2026. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN IEC 61851-23:2026 is associated with the following European legislation: EU Directives/Regulations: 2014/35/EU, 2014/53/EU; Standardization Mandates: M/468, M/511, M/536. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
EN IEC 61851-23:2026 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2026
Nadomešča:
SIST EN 61851-23:2014
SIST EN 61851-23:2014/AC:2016
Sistem kabelskega napajanja električnih vozil - 23. del: Postaja za kabelsko
napajanje električnega vozila z enosmernim tokom
Electric vehicle conductive charging system - Part 23: DC electric vehicle supply
equipment
Konduktive Ladesysteme für Elektrofahrzeuge - Teil 23:
Gleichstromversorgungseinrichtungen für Elektrofahrzeuge
Système de charge conductif pour véhicules électriques - Partie 23 : Borne de charge en
courant continu pour véhicules électriques
Ta slovenski standard je istoveten z: EN IEC 61851-23:2026
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
NORME EUROPÉENNE
EUROPÄISCHE NORM October 2026
ICS 43.120 Supersedes EN 61851-23:2014; EN 61851-
23:2014/AC:2016-06
English Version
Electric vehicle conductive charging system - Part 23: DC
electric vehicle supply equipment
(IEC 61851-23:2023)
Système de charge conductif pour véhicules électriques - Konduktive Ladesysteme für Elektrofahrzeuge - Teil 23:
Partie 23: Borne de charge en courant continu pour Gleichstromversorgungseinrichtungen für Elektrofahrzeuge
véhicules électriques (IEC 61851-23:2023)
(IEC 61851-23:2023)
This European Standard was approved by CENELEC on 2026-08-03. 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 61851-23:2026 E
European foreword
The text of document 69/907/FDIS, future edition 2 of IEC 61851-23, 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 61851-23:2026.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2027-10-31
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2029-10-31
document have to be withdrawn
This document supersedes EN 61851-23:2014 and all of its amendments and corrigenda (if any).
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 61851-1:2019.
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 Standard IEC 61851-23:2023 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 60068-2-11 NOTE Approved as EN IEC 60068-2-11
IEC 60364-4-41:2005 NOTE Approved as HD 60364-4-41:2017 + A11:2017
IEC 60364-5-55 NOTE Approved as HD 60364-5-559
IEC 60364-7-722 NOTE Approved as HD 60364-7-722
IEC 60695-10-3 NOTE Approved as EN 60695-10-3
IEC 60695-11-10 NOTE Approved as EN 60695-11-10
IEC 61557-9:2014 NOTE Approved as EN 61557-9:2015 (not modified)
IEC 61558-2-6 NOTE Approved as EN IEC 61558-2-6
IEC 61851-23:2014 NOTE Approved as EN 61851-23:2014 (not modified)
IEC 62305-4:2010 NOTE Approved as EN 62305-4:2011
IEC 62909-1 NOTE Approved as EN IEC 62909-1
IEC 62909-2 NOTE Approved as EN IEC 62909-2
ISO/IEC 17025:2017 NOTE Approved as EN ISO/IEC 17025:2017 (not modified)
ISO 15118-1:2019 NOTE Approved as EN ISO 15118-1:2019 (not modified)
ISO 15118-3:2015 NOTE Approved as EN ISO 15118-3:2016 (not modified)
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 (mod) 2009 IEC standard voltages EN 60038 2011
IEC 60068-2-75 2014 Environmental testing - Part 2-75: Tests - Test EN 60068-2-75 2014
Eh: Hammer tests
IEC 60068-2-78 - Environmental testing - Part 2-78: Tests - Test EN IEC 60068-2-78 -
Cab: Damp heat, steady state
IEC 60227-1 2007 Polyvinyl chloride insulated cables of rated - -
voltages up to and including 450/750 V - Part
1: General requirements
IEC 60245-1 2003 Rubber insulated cables - Rated voltages up - -
to and including 450/750 V - Part 1: General
requirements
+ A1 2007 - -
IEC 60320-1 - Appliance couplers for household and similar EN IEC 60320-1 -
general purposes - Part 1: General
requirements
IEC 60364-4-43 2008 Low-voltage electrical installations - Part 4-43: HD 60364-4-43 2010
(mod) Protection for safety - Protection against
overcurrent
IEC 60364-5-53 2019 Low-voltage electrical installations - Part 5-53: HD 60364-5-53 2022
Selection and erection of electrical equipment
- Protection, isolation, switching, control and
monitoring
IEC 60364-5-54 2011 Low-voltage electrical installations - Part 5-54: HD 60364-5-54 2011
Selection and erection of electrical equipment
- Earthing arrangements and protective
conductors
- - + A11 2017
+ A1 2021 + A1 2022
Publication Year Title EN/HD Year
IEC 60384-14 - Fixed capacitors for use in electronic EN IEC 60384-14 -
equipment - Part 14: Sectional specification -
Fixed capacitors for electromagnetic
interference suppression and connection to
the supply mains
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 60664-1 2020 Insulation coordination for equipment within EN IEC 60664-1 2020
low-voltage supply systems - Part 1:
Principles, requirements and tests
IEC 60811-501 - Electric and optical fibre cables - Test EN 60811-501 -
methods for non-metallic materials - Part 501:
Mechanical tests - Tests for determining the
mechanical properties of insulating and
sheathing compounds
IEC 60812 2018 Failure modes and effects analysis (FMEA EN IEC 60812 2018
and FMECA)
IEC 60990 2016 Methods of measurement of touch current and EN 60990 2016
protective conductor current
IEC 61008-1 (mod) 2010 Residual current operated circuit-breakers EN 61008-1 2012
without integral overcurrent protection for
household and similar uses (RCCBs) - Part 1:
General rules
+ A1 (mod) 2012 + A1 2014
+ A2 (mod) 2013 + A2 2014
- - + A11 2015
- - + A12 2017
IEC 61009-1 (mod) 2010 Residual current operated circuit-breakers EN 61009-1 2012
with integral overcurrent protection for
household and similar uses (RCBOs) - Part 1:
General rules
+ A1 (mod) 2012 + A1 2014
+ A2 (mod) 2013 + A2 2014
- - + A11 2015
- - + A12 2016
- - + A13 2021
IEC 60947-2 2016 Low-voltage switchgear and controlgear - Part EN 60947-2 2017
2: Circuit-breakers
+ A1 2019 + A1 2020
IEC 61140 2016 Protection against electric shock - Common EN 61140 2016
aspects for installation and equipment
IEC 61439-1 2020 Low-voltage switchgear and controlgear EN IEC 61439-1 2021
assemblies - Part 1: General rules
Publication Year Title EN/HD Year
IEC 61439-7 2022 Low-voltage switchgear and controlgear EN IEC 61439-7 2023
assemblies - Part 7: Assemblies for specific
applications such as marinas, camping sites,
market squares, electric vehicle charging
stations
IEC 61540 (mod) 1997 Electrical accessories - Portable residual HD 639 S1 2002
current devices without integral overcurrent
protection for household and similar use
(PRCDs)
+ A1 1998 + A1 2003
- - + corrigendum Jul. 2003
- - + A2 2010
IEC 61557-8 2014 Electrical safety in low voltage distribution EN 61557-8 2015
systems up to 1 000 V a.c. and 1 500 V d.c. -
Equipment for testing, measuring or
monitoring of protective measures - Part 8:
Insulation monitoring devices for IT systems
IEC 61558-1 2017 Safety of transformers, reactors, power supply EN IEC 61558-1 2019
units and combinations thereof - Part 1:
General requirements and tests
IEC 61558-2-4 2021 Safety of transformers, reactors, power supply EN IEC 61558-2-4 2025
units and combinations thereof - Part 2-4:
Particular requirements and tests for isolating
transformers and power supply units
incorporating isolating transformers for
general applications
IEC 61643 series Low-voltage surge protective devices EN IEC 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
IEC 61851-21-2 2018 Electric vehicle conductive charging system - EN IEC 61851-21-2 2021
Part 21-2: Electric vehicle requirements for
conductive connection to an AC/DC supply -
EMC requirements for off board electric
vehicle charging systems
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 62196-1 2022 Plugs, socket-outlets, vehicle connectors and EN IEC 62196-1 2022
vehicle inlets - Conductive charging of electric
vehicles - Part 1: General requirements
Publication Year Title EN/HD Year
IEC 62196-3 2022 Plugs, socket-outlets, vehicle connectors and EN IEC 62196-3 2022
vehicle inlets - Conductive charging of electric
vehicles - Part 3: Dimensional compatibility
requirements for DC and AC/DC pin and
contact-tube vehicle couplers
IEC/TS 62196-3-1 2020 Plugs, socket-outlets, vehicle connectors and - -
vehicle inlets - Conductive charging of electric
vehicles - Part 3-1: Vehicle connector, vehicle
inlet and cable assembly for DC charging
intended to be used with a thermal
management system
IEC 62368-1 2023 Audio/video, information and communication EN IEC 62368-1 2024
technology equipment - Part 1: Safety
requirements
IEC 62423 (mod) 2009 Type F and type B residual current operated EN 62423 2012
circuit-breakers with and without integral
overcurrent protection for household and
similar uses
- - + A11 2021
- - + A12 2022
IEC 62262 - Degrees of protection provided by enclosures EN 62262 -
for electrical equipment against external
mechanical impacts (IK code)
IEC 62477-1 2022 Safety requirements for power electronic EN IEC 62477-1 2023
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
IEC Guide 115 - Application of measurement uncertainty to - -
conformity assessment activities in the
electrotechnical sector
ISO 2719 2016 Determination of flash point - Pensky-Martens - -
closed cup method
ISO 6469-3 2018 Electrically propelled road vehicles - Safety - -
specifications - Part 3: Electrical safety
ISO 7000 - Graphical symbols for use on equipment - - -
Registered symbols
ISO 7010 - Graphical symbols - Safety colours and safety - -
signs - Registered safety signs
ISO 15118-2 2014 Road vehicles - Vehicle-to-grid EN ISO 15118-2 2016
communication interface - Part 2: Network
and application protocol requirements
ISO 15118-3 - Road vehicles - Vehicle to grid communication EN ISO 15118-3 -
interface - Part 3: Physical and data link layer
requirements
Publication Year Title EN/HD Year
ISO 17409 2020 Electrically propelled road vehicles - - -
Conductive power transfer - Safety
requirements
DIN SPEC 70121 2014 Electromobility - Digital communication - -
between a DC EV charging station and an
electric vehicle for control of DC charging in
the combined charging system
OECD 301 B - OECD Guideline for testing of chemicals - -
IEC 61851-23 ®
Edition 2.0 2023-12
INTERNATIONAL
STANDARD
colour
inside
Electric vehicle conductive charging system –
Part 23: DC electric vehicle supply equipment
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 43.120 ISBN 978-2-8322-7961-8
– 2 – IEC 61851-23:2023 © IEC 2023
CONTENTS
FOREWORD . 15
1 Scope . 18
2 Normative references . 19
3 Terms and definitions . 22
3.1 Electric supply equipment . 22
3.2 Insulation . 22
3.3 Functions . 26
3.4 Vehicle . 30
3.5 Cords, cables and connection means . 31
3.6 Service and usage . 32
3.7 General terms . 33
4 General requirements . 40
5 Classification . 40
5.101 Characteristics of EV supply equipment . 40
5.101.1 Separation type . 40
5.101.2 Control system . 40
5.101.3 System . 40
5.101.4 Thermal management system . 40
5.101.5 Power distribution system . 41
6 Charging modes and functions . 41
6.2 Charging modes . 41
6.2.1 Mode 1 . 41
6.2.2 Mode 2 . 41
6.2.3 Mode 3 . 41
6.3 Functions provided in Mode 4 . 41
6.3.1 Mandatory functions in Mode 4 . 41
6.3.2 Optional functions for Mode 4 . 62
7 Communications . 63
7.1 Digital communication between the EV supply equipment and the EV . 63
7.1.101 Basic communication interface . 64
8 Protection against electric shock . 64
8.101 General provisions . 64
8.101.1 General . 64
8.101.2 Intended use and reasonably foreseeable misuse . 65
8.101.3 Limitation of touch current or touch voltage . 65
8.101.4 Threshold of perception and startle reaction . 65
8.102 Basic protection . 68
8.102.1 General . 68
8.102.2 Protection by means of basic insulation of live parts . 68
8.102.3 Protection by means of enclosures or barriers . 68
8.102.4 Protection by means of limitation of voltage . 68
8.102.5 Protection by means of limitation of steady-state touch current . 70
8.103 Fault protection . 70
8.103.1 General . 70
8.103.2 Protective-equipotential-bonding. 70
IEC 61851-23:2023 © IEC 2023 – 3 –
8.103.3 Effective protective conductor continuity between the enclosure and the
external protective circuit . 70
8.103.4 Automatic disconnection of supply . 71
8.103.5 Supplementary insulation. 71
8.103.6 Electrically protective screening . 71
8.104 Enhanced protective provision . 71
8.104.1 General . 71
8.104.2 Double or reinforced insulation . 71
8.104.3 Protective separation between circuits . 72
8.105 Requirements for separated EV supply equipment . 72
8.105.1 General . 72
8.105.2 Equipotential bonding on side B . 74
8.105.3 Impedance to protective conductor on side B . 74
8.105.4 Degrees of protection against access to hazardous-live-parts . 75
8.105.5 Insulation barriers . 76
8.105.6 Stored energy . 77
8.105.7 Disconnection from vehicle . 78
8.105.8 Protective (earthing) conductor from the supply network . 78
8.105.9 Residual current protective devices . 79
8.105.10 Safety requirements for auxiliary circuits between the EV supply
equipment and the EV . 79
8.105.11 Protective conductor dimension cross-sectional area . 79
9 Conductive electrical interface requirements. 80
9.1 General . 80
9.5 Functional description of the DC interface . 80
9.7 Wiring of the neutral conductor . 80
9.101 Avoidance of breaking under load . 80
10 Requirements for adaptors . 81
11 Cable assembly requirements . 82
11.1 General . 82
11.6 Strain relief . 82
11.6.101 Strain relief of the EV supply equipment's side B cable assembly . 82
11.6.102 Test of the anchorage of the side B cable assembly . 83
11.101 Cable breakaway . 85
11.102 Surface temperature of the side B cable assembly . 85
12 EV supply equipment constructional requirements and tests . 87
12.1 General . 87
12.2 Characteristics of mechanical switching devices . 87
12.2.5 Relays . 87
12.3 Clearances and creepage distances. 87
12.4 IP degrees . 87
12.4.1 Degrees of protection against solid foreign objects and water for the
enclosures . 87
12.5 Insulation resistance . 88
12.6 Touch current . 88
12.6.101 Touch current limit . 88
12.6.102 Test . 88
12.6.103 Protection measures for the test touch current more than 3,5 mA . 89
12.7 Dielectric withstand voltage . 90
– 4 – IEC 61851-23:2023 © IEC 2023
12.7.2 Impulse dielectric withstand (1,2 μs/50 μs) . 90
12.7.101 Suppression of transient overvoltage at side A (insulation coordination) . 90
12.7.102 Protection against transient overvoltages of atmospheric origin or due
to switching . 92
12.8 Temperature rise . 94
12.9 Damp heat functional test . 94
12.10 Minimum temperature functional test . 94
12.11 Mechanical strength . 94
12.101 Side A current . 95
12.102 Power supply cords . 96
12.102.1 General . 96
12.102.2 Cross-sectional area . 96
12.102.3 Cord anchorages and strain relief for non-detachable power supply
cords . 97
12.103 Stress relief test . 98
12.104 Abnormal operation and simulated fault condition tests . 99
12.104.1 General . 99
12.104.2 Pass criteria . 99
12.104.3 Breakdown of components test . 100
12.104.4 Loss of AC supply phase test . 100
12.104.5 Inoperative blower/fan motor test . 100
12.104.6 Clogged filter test . 101
12.105 Protection against electrically caused fire . 101
12.105.1 General . 101
12.105.2 Fire enclosure . 101
12.106 Protection against chemical hazards . 101
12.106.1 Type of coolant . 101
12.106.2 Flammability . 102
12.106.3 Material compatibility . 102
12.107 Enclosures . 102
12.107.1 General . 102
12.107.2 Strength of materials and parts . 103
12.107.3 Enclosure integrity tests . 103
12.108 Components bridging insulation . 103
12.108.1 General . 103
12.108.2 Capacitors . 104
12.109 Isolating transformers . 104
13 Overload and short-circuit protection . 104
13.1 General . 104
13.2 Overload protection of the cable assembly . 104
13.3 Short-circuit protection of the charging cable . 104
13.101 Short-circuit protection of the DC connection during energy transfer . 105
14 Automatic reclosing of protective devices . 106
15 Emergency switching or disconnect (optional) . 106
16 Marking and instructions . 106
16.1 Installation manual of EV charging stations . 106
16.2 User manual for EV supply equipment . 107
16.3 Marking of EV supply equipment . 108
16.4 Marking of charging cable assemblies case B . 108
IEC 61851-23:2023 © IEC 2023 – 5 –
101 Specific requirements for EV supply equipment . 108
101.1 Specific requirements for separated EV supply equipment . 108
101.1.1 Operating ranges for voltage, current, and power at side B. 108
101.1.2 Voltage and current tolerance at side B . 109
101.1.3 Control delay of present current at side B in CCM . 111
101.1.4 Descending rate of present current at side B . 114
101.1.5 Periodic and random deviation (current ripple at side B during CCM) . 114
101.1.6 Periodic and random deviation (voltage ripple at side B during CVM) . 115
101.1.7 Load dump . 117
101.1.8 Side B inductance . 117
101.2 Specific requirement for energy transfer with a thermal management system
or thermal sensing only . 118
101.2.1 General . 118
101.2.2 Temperature limits and self-diagnostics . 118
101.2.3 Temperature monitoring . 119
101.2.4 Tests for thermal management system performance of the EV supply
equipment . 120
101.3 Specific requirements for temperature-controlled energy transfer . 129
102 Test methods . 130
102.1 Technical data . 130
102.2 General test conditions . 130
102.2.1 Ambient test conditions. 130
102.2.2 Measuring instruments . 131
102.2.3 Test setups . 131
102.2.4 Test load . 134
102.2.5 Operating points for tests . 136
Annexes . 138
Annex AA (normative) EV supply equipment of system A . 139
AA.1 General . 139
AA.2 Circuit diagram . 139
AA.3 Specific safety requirements . 142
AA.3.1 Fault protection in side B . 142
AA.3.2 De-energization of the power supply to the EV . 146
AA.3.3 Voltage measurement of side B live parts (DC+/DC–) for vehicle
connector unlatch . 147
AA.3.4 Overcurrent protection of side B . 147
AA.3.5 Short-circuit protection of side B . 147
AA.3.6 Latch monitoring for the vehicle connector . 148
AA.3.7 Protection of the EV disconnection device . 149
AA.3.8 Fault conditions and criteria for transfer to error and emergency
shutdown . 149
AA.3.9 Inrush current limitation by the EV supply equipment . 154
AA.3.10 Regulation of the present current at side B in CCM . 155
AA.3.11 Periodic and random deviation (current ripple at side B during CCM) . 156
AA.3.12 Overvoltage protection including load dump . 157
AA.3.13 Power supply to the EV for the actuation of EV disconnection device . 158
AA.3.14 Impedance of the side B circuit . 158
AA.3.15 Assistance of welding detection . 158
AA.3.16 Specific requirements for temperature-controlled energy transfer . 159
– 6 – IEC 61851-23:2023 © IEC 2023
AA.4 FPT process and communication between the EV supply equipment and the
EV for energy transfer control . 159
AA.4.1 Forward power transfer states . 159
AA.4.2 Communication measures . 161
AA.4.3 Forward power transfer control process . 162
AA.4.4 Measuring current and voltage at side B . 168
AA.5 Response to an EV command on charge current . 170
AA.6 Bidirectional power transfer (optional) . 172
AA.6.1 General . 172
AA.6.2 Circuit diagram . 172
AA.6.3 Functional requirements . 174
AA.6.4 Bidirectional power transfer control process. 176
AA.7 Optional functions . 181
AA.7.1 General . 181
AA.7.2 Compatibility check . 181
AA.7.3 Dynamic control . 181
AA.7.4 High-current control . 182
AA.7.5 High-voltage control. 182
AA.8 Compliance test for user-initiated shutdown . 182
AA.9 Specific requirement for energy transfer with thermal management system . 183
Annex BB (normative) EV supply equipment of system B . 184
BB.1 General . 184
BB.2 Circuit diagrams . 184
BB.2.1 Circuit diagram . 184
BB.2.2 Requirements of IMD and discharge circuit . 186
BB.3 Parameters of control pilot circuit . 186
BB.4 Forward power transfer control process under normal condition . 187
BB.4.1 Side B regulation . 187
BB.4.2 Measuring current and voltage . 187
BB.4.3 Vehicle coupler mating confirmation . 189
BB.4.4 Forward power transfer control sequence . 189
BB.4.5 Normal shutdown . 191
BB.5 Safety requirements under failure mode . 191
BB.5.1 Error shutdown and emergency shutdown. 191
BB.5.2 Terminate energy transfer due to an EV supply equipment fault. 193
BB.5.3 Terminate energy transfer due to an EV fault . 194
BB.5.4 Digital communication timeout . 194
BB.5.5 Loss of electrical continuity of the control pilot . 195
BB.5.6 Overvoltage fault . 195
BB.5.7 Load dump . 196
BB.5.8 Short-circuit protection of side B . 197
BB.5.9 Lock and latch monitoring for vehicle connector . 198
BB.5.10 Overcurrent protection of side B . 198
BB.5.11 Insulation fault monitoring . 198
BB.6 Timing sequence diagram of forward power transfer . 199
BB.7 Side B current regulation in CCM . 200
BB.8 Insulation resistance check before energy transfer. 202
BB.9 Side B voltage regulation in CVM . 204
BB.10 Periodic and random deviation (voltage ripple at side B in CVM) . 206
IEC 61851-23:2023 © IEC 2023 – 7 –
BB.11 Energy transfer control mode . 206
BB.11.1 Definition . 206
BB.11.2 Typical forward power transfer process . 207
BB.12 Standby mode . 208
BB.13 Smart charging .
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