Electric vehicle conductive charging system - Part 23: DC electric vehicle supply equipment

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

Système de charge par conduction pour véhicules électriques – Partie 23: Système d'alimentation en courant continu pour véhicules électriques

IEC 61851-23:2023 s’applique aux systèmes d’alimentation pour VE afin de permettre un transfert d’énergie entre le réseau d'alimentation et les véhicules électriques (VE), avec une tension maximale alternative assignée de 1 000 V ou une tension maximale continue assignée de 1 500 V du côté A et une tension maximale continue assignée de 1 500 V du côté B.
Le présent document spécifie le système d’alimentation pour VE des systèmes A, B, C définis à l’Annexe AA, l’Annexe BB et l’Annexe CC. D’autres systèmes sont à l’étude.
Le présent document spécifie les exigences relatives au système d'alimentation pour VE à transfert de puissance bidirectionnel (TPB) pour le système A, avec une tension maximale alternative assignée de 1 000 V ou une tension maximale continue assignée de 1 500 V du côté A. Les exigences relatives au transfert de puissance inverse (TPI) et au TPB pour le système B et le système C sont à l’étude et ne sont pas spécifiées dans le présent document.
Cette deuxième édition annule et remplace la première édition parue en 2014. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) la structure du présent document a été réorganisée conformément à l'IEC 61851-1:2017;
b) les exigences de sécurité électrique de l'Article 8 et de l'Article 12 ont été révisées en se fondant sur les exigences de l'IEC 62477-1 et en s'inspirant des principes de la sécurité fondée sur le danger de l'IEC 62368-1;
c) des méthodes d'essai de vérification de la conformité aux exigences établies ont été ajoutées. Des dispositions générales relatives aux essais de conformité ont été spécifiées à l'Article 102;
d) des exigences et/ou informations spécifiques relatives aux fonctions suivantes ont été ajoutées: transfert d'énergie avec système de gestion thermique (101.2), contrôle de transfert de puissance bidirectionnel (Annexe DD), système d’alimentation pour VE avec séparation électrique à plusieurs côtés B (Annexe FF) et processus de communication et de transfert d'énergie (Annexe GG);
e) l’Annexe AA (système A), l’Annexe BB (système B) et l’Annexe CC (système C) ont été mises à jour avec intégration des ajouts conjointement à b) et c). Le présent document a été limité au système A, au système B et au système C;
f) les anciennes Annexe DD et Annexe EE ont été supprimées. Une nouvelle Annexe EE, qui comprend les exigences relatives à la charge d’essai artificielle, a été ajoutée;
g) une nouvelle annexe informative relative au courant de contact et au courant de choc de contact (Annexe HH) a été ajoutée.
La présente version bilingue (2024-05) correspond à la version anglaise monolingue publiée en 2023-12.
La version française de cette norme n'a pas été soumise au vote.

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IEC 61851-23 ®
Edition 2.0 2023-12
Electric vehicle conductive charging system –
Part 23: DC electric vehicle supply equipment

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IEC 61851-23 ®
Edition 2.0 2023-12
Electric vehicle conductive charging system –

Part 23: DC electric vehicle supply equipment

ICS 43.120  ISBN 978-2-8322-7961-8

– 2 – IEC 61851-23:2023 © IEC 2023
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

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 .

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