IEC 61851-1:2017

Electric vehicle conductive charging system - Part 1: General requirements

IEC 61851-1:2017 applies to EV supply equipment for charging electric road vehicles, with a rated supply voltage up to 1 000 V AC or up to 1 500 V DC and a rated output voltage up to 1 000 V AC or up to 1 500 V DC. Electric road vehicles (EV) cover all road vehicles, including plug-in hybrid road vehicles (PHEV), that derive all or part of their energy from on-board rechargeable energy storage systems (RESS). The aspects covered in this standard include:
- the characteristics and operating conditions of the EV supply equipment;
- the specification of the connection between the EV supply equipment and the EV;
- the requirements for electrical safety for the EV supply equipment.
This third edition cancels and replaces the second edition published in 2010. It constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) The contents of IEC 61851-1:2010 have been re-ordered. Numbering of clauses has changed as new clauses were introduced and some contents moved for easy reading. The following lines give an insight to the new ordering in addition to the main technical changes.
b) All requirements from IEC 61851-22 have been moved to this standard, as work on IEC 61851-22 has ceased.
c) Any requirements that concern EMC have been removed from the text and are expected to be part of the future version of 61851-21-2.
d) Clause 4 contains the original text from IEC 61851-1:2010 and all general requirements from Clause 6 of IEC 61851-1:2010.
e) Clause 5 has been introduced to provide classifications for EV supply equipment.
f) Previous general requirements of Clause 6 have been integrated into Clause 4. Clause 6 contains all Mode descriptions and control requirements. Specific requirements for the combined use of AC and DC on the same contacts are included.
g) Clause 9 is derived from previous Clause 8. Adaptation of the description of DC accessories to allow for the DC charging modes that have only recently been proposed by industry and based on the standards IEC 61851-23, IEC 61851-24 as well as IEC 62196-1, IEC 62196-2 and IEC 62196-3. Information and tables contained in the IEC 62196 series standards have been removed from this standard.
h) Clause 10 specifically concerns the requirements for adaptors, initially in Clause 6.
i) Clause 11 includes new requirements for the protection of the cable.
j) Specific requirements for equipment that is not covered in the IEC 62752 remain in the present document.
k) Previous Clause 11 is now treated in Clauses 12 to 13. The requirements in 61851-1 cover the EV supply equipment of both mode 2 and mode 3 types, with the exception in-cable control and protection devices for mode 2 charging of electric road vehicles (IC-CPD) which are covered by IEC 62752.
l) Clause 14 gives requirements on automatic reclosing of protection equipment.
m) Clause 16 gives requirements for the marking of equipment and the contents of the installation and user manual. This makes specific mention of the need to maintain coherence with the standards for the fixed installation. It also contains an important text on the markings for temperature ratings.
n) Annex A has been reviewed to introduce complete sequences and tests and to make the exact cycles explicit. Annex A in this edition supersedes IEC TS 62763 (Edition 1).
o) Annex B is normative and has requirements for proximity circuits with and without current coding.
p) Previous Annex C has been removed and informative descriptions of pilot function and proximity function implementations initially in Annex B are moved to Annex C.
q) New informative Annex D describing an alternative pilot function system has been introduced.
r) Dimensional requirements for free space to be left around socket-outlets used for EV energy supply are given in the informative Annex E.
s) The inclusion of protection devices within the EV supply equipment could, in some cases, contribute to the

Système de charge conductive pour véhicules électriques - Partie 1: Exigences générales

L'IEC 61851-1:2017 s'applique au système d’alimentation pour VE destiné à charger les véhicules routiers électriques, avec une tension assignée d’alimentation jusqu'à 1 000 V en courant alternatif ou 1 500 V en courant continu, et une tension de sortie assignée jusqu'à 1 000 V en courant alternatif ou 1 500 V en courant continu. Les véhicules routiers électriques (VE) couvrent l'ensemble des véhicules routiers, y compris les véhicules routiers hybrides rechargeables (PHEV), qui tirent tout ou partie de leur énergie des systèmes de stockage d'énergie rechargeable à bord du véhicule (RESS). La présente Norme couvre les aspects suivants:
- les caractéristiques et conditions de fonctionnement du système d'alimentation pour VE;
- la spécification de la connexion entre le système d'alimentation pour VE et le VE;
- les exigences relatives à la sécurité électrique du système d'alimentation pour VE.
Cette troisième édition annule et remplace la deuxième édition parue en 2010. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) Le contenu de l'IEC 61851-1:2010 a été réorganisé. La numérotation des articles a été modifiée, de nouveaux articles ayant été introduits et du contenu ayant été retiré pour faciliter la lecture. Les lignes suivantes donnent un aperçu de la nouvelle organisation en plus des modifications techniques majeures apportées.
b) Toutes les exigences de l'IEC 61851-22 ont été reprises dans la présente Norme, le travail sur l'IEC 61851-22 ayant cessé.
c) Toutes les exigences relatives à la compatibilité électromagnétique (CEM) ont été supprimées et font partie intégrante de la future version de l'IEC 61851-21-2.
d) L'Article 4 contient le texte original de l'IEC 61851-1:2010 et toutes les exigences générales de l'Article 6 de l'IEC 61851-1:2010.
e) L'Article 5 a été introduit pour fournir les classifications du système d’alimentation pour VE.
f) Les exigences générales précédentes de l'Article 6 ont été intégrées dans l'Article 4. L'Article 6 contient toutes les descriptions de mode et exigences de commande. Les exigences spécifiques relatives à l'utilisation combinée du courant alternatif et du courant continu sur les mêmes contacts sont incluses.
g) L'Article 9 est déduit du précédent Article 8. Adaptation de la description des accessoires en courant continu afin d'autoriser les modes de charge en courant continu qui n'ont été que récemment proposés par le secteur industriel et qui s'appuient sur les Normes IEC 61851-23, IEC 61851-24, IEC 62196-1, IEC 62196-2 et IEC 62196-3. Les informations et tableaux de la série IEC 62196 ont été supprimés de la présente norme.
h) L'Article 10 concerne particulièrement les exigences relatives aux adaptateurs, spécifiées à l'origine à l'Article 6.
i) L'Article 11 contient de nouvelles exigences relatives à la protection du câble.
j) Les exigences spécifiques relatives aux équipements non couverts par l'IEC 62752 sont conservées dans le présent document.
k) Le précédent Article 11 est désormais traité dans les Articles 12 à 13. Les exigences spécifiées dans l'IEC 61851-1 portent sur les systèmes d'alimentation pour VE Mode 2 et Mode 3, à l'exception des appareils de contrôle et de protection intégrés au câble pour la charge en mode 2 des véhicules routiers électriques (IC-CPD), qui sont couverts par l'IEC 62752.
l) L'Article 14 donne les exigences relatives au réenclenchement automatique des dispositifs de protection.
m) L'Article 16 donne les exigences relatives au marquage des équipements et au contenu du manuel d'installation et de l'utilisateur. Il souligne particulièrement la nécessité de maintenir la cohérence avec les normes relatives aux installations fixes. Il contient également un texte important sur les marquages des caractéristiques assignées de température.
n) L'Annexe A a été révisée de manière à introduire les séquences et essais complets et expliciter

General Information

• Status: Published
• Publication Date: 06-Feb-2017
• ICS: 43.120 - Electric road vehicles
• Technical Committee: TC 69 - Electrical power/energy transfer systems for electrically propelled road vehicles and industrial trucks
• Drafting Committee: WG 4 - TC 69/WG 4
• Current Stage: PPUB - Publication issued
• Start Date: 07-Feb-2017
• Completion Date: 15-Dec-2016

Relations

• Corrected By: IEC 61851-1:2017/COR1:2023 - Corrigendum 1 - Electric vehicle conductive charging system - Part 1: General requirements
• Effective Date: 13-Oct-2023
• Revises: IEC 61851-1:2010 - Electric vehicle conductive charging system - Part 1: General requirements
• Effective Date: 05-Sep-2023

Overview

IEC 61851-1:2017 is an international standard developed by the International Electrotechnical Commission (IEC) that specifies the general requirements for electric vehicle (EV) conductive charging systems. It applies to EV supply equipment designed for charging electric road vehicles, including plug-in hybrid electric vehicles (PHEVs), with rated supply voltages up to 1,000 V AC or 1,500 V DC. This third edition replaces the 2010 version and includes significant technical revisions, consolidating key requirements for EV charging safety, interfaces, classifications, and functionality.

The standard defines characteristics and operating conditions for EV supply equipment, outlines connection specifications between the supply equipment and electric vehicles, and establishes stringent electrical safety requirements. By ensuring interoperability and safety, IEC 61851-1:2017 supports the expanding market of electric vehicles and infrastructure deployment worldwide.

Key Topics

• Scope and Application
  IEC 61851-1:2017 covers conductive charging systems for electric road vehicles, including PHEVs, and applies to equipment with input and output voltages up to 1,000 V AC and 1,500 V DC. It defines classifications, test requirements, and performance criteria for EV supply equipment.

• Classification of EV Supply Equipment
  The standard introduces classifications based on power supply input and output characteristics, environmental conditions, mounting methods, and protection levels. This helps manufacturers design compliant charging equipment for diverse installation scenarios.

• Charging Modes
  The document specifies four charging modes:

  • Mode 1: Basic charging from a standard household socket without communication.
  • Mode 2: Charging with additional protective measures and basic communication.
  • Mode 3: Dedicated EV supply equipment with advanced communication and control.
  • Mode 4: DC fast charging with dedicated charging stations and communication protocols.

• Electrical Safety and Protection
  Key requirements include protection against electric shock, residual current protective devices, isolation, and controlled disconnection. The standard also covers protection for cabling, adaptors, and automatic reclosing of protective devices to ensure safe operation.

• Communication Requirements
  IEC 61851-1 outlines digital communication protocols between EV supply equipment and vehicles, as well as communication with management systems, ensuring compatibility and enabling intelligent charging functions.

• Construction and Testing
  Specifications on mechanical and electrical construction, environmental protection (IP ratings), insulation, dielectric withstand, temperature rise, and mechanical strength are provided. The standard requires thorough testing to validate compliance and durability under various conditions.

• Marking and Documentation
  The standard mandates clear equipment labeling, including electrical ratings and temperature markings, alongside installation and user manuals aligned with fixed installation standards for user safety and proper operation.

Applications

• EV Charging Station Manufacturing
  Manufacturers of charging stations and EVSE (Electric Vehicle Supply Equipment) rely on IEC 61851-1:2017 to design safe, interoperable, and compliant products suitable for residential, commercial, and public charging infrastructure.

• Vehicle Manufacturer Compliance
  Car makers use the standard to ensure the connectivity and charging compatibility of their vehicles with standardized EVSE, supporting various charging modes and interface types.

• Infrastructure Deployment
  Utilities and infrastructure providers apply IEC 61851-1 guidelines to implement electrical supply systems capable of safely delivering power to EVs, supporting grid integration and load management.

• Policy and Regulation Development
  Regulatory agencies reference this standard to create safety and technical regulations governing EV charging equipment, contributing to market harmonization and consumer protection.

• Safety Assessments and Certifications
  Independent testing labs and certification bodies use IEC 61851-1 as a benchmark for evaluating EV charging products’ conformity to international safety and performance criteria.

Related Standards

• IEC 61851-22 - Initially distinct, its requirements have been integrated into this document, covering DC charging specifics now consolidated in IEC 61851-1.

• IEC 62752 - Covers in-cable control and protection devices for mode 2 charging, complementary to IEC 61851-1’s broader charging equipment scope.

• IEC 61851-23 and IEC 61851-24 - Address detailed aspects of DC charging modes, referenced for accessory and interface requirements.

• IEC 62196 Series - Defines dimensional and performance requirements for charging connectors and vehicle inlets, ensuring mechanical and electrical compatibility.

• IEC 61851-21-2 - Planned future updates will migrate Electromagnetic Compatibility (EMC) requirements to this standard.

Conclusion

IEC 61851-1:2017 serves as a foundational standard for electric vehicle conductive charging systems, emphasizing safety, interoperability, and quality. Its comprehensive guidelines enable manufacturers and stakeholders to develop charging solutions that meet stringent international requirements, advancing the adoption of electric mobility worldwide. Key keywords for this standard include EV charging standard, electric vehicle supply equipment, conductive charging, charging modes, and charging safety requirements.

Standards Content (Sample)

IEC 61851-1 ®
Edition 3.0 2017-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electric vehicle conductive charging system –
Part 1: General requirements
Système de charge conductive pour véhicules électriques –
Partie 1: Exigences générales
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IEC 61851-1 ®
Edition 3.0 2017-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electric vehicle conductive charging system –

Part 1: General requirements
Système de charge conductive pour véhicules électriques –

Partie 1: Exigences générales
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 43.120 ISBN 978-2-8322-3766-3

– 2 – IEC 61851-1:2017  IEC 2017
CONTENTS
FOREWORD . 9
INTRODUCTION . 12
1 Scope . 14
2 Normative references . 15
3 Terms and definitions . 17
3.1 Electric supply equipment . 17
3.2 Insulation . 19
3.3 Functions . 20
3.4 Vehicle . 21
3.5 Cords, cables and connection means . 21
3.6 Service and usage . 24
3.7 General terms . 25
4 General requirements . 27
5 Classification . 27
5.1 Characteristics of power supply and output . 27
5.1.1 Characteristics of power supply input. 27
5.1.2 Characteristics of power supply output . 28
5.2 Normal environmental conditions . 28
5.3 Special environmental conditions . 28
5.4 Access . 28
5.5 Mounting method . 28
5.6 Protection against electric shock . 28
5.7 Charging modes . 29
6 Charging modes and functions . 29
6.1 General . 29
6.2 Charging modes . 29
6.2.1 Mode 1 . 29
6.2.2 Mode 2 . 30
6.2.3 Mode 3 . 30
6.2.4 Mode 4 . 30
6.3 Functions provided in Mode 2, 3 and 4 . 31
6.3.1 Mandatory functions in Modes 2, 3, and 4 . 31
6.3.2 Optional functions for Modes 2, 3 and 4 . 32
7 Communications . 33
7.1 Digital communication between the EV supply equipment and the EV . 33
7.2 Digital communication between the EV supply equipment and the
management system . 34
8 Protection against electric shock . 34
8.1 Degrees of protection against access to hazardous-live-parts . 34
8.2 Stored energy . 35
8.2.1 Disconnection of plug connected EV supply equipment . 35
8.2.2 Loss of supply voltage to permanently connected EV supply equipment . 35
8.3 Fault protection . 35
8.4 Protective conductor . 35
8.5 Residual current protective devices. 36

8.6 Safety requirements for signalling circuits between the EV supply equipment
and the EV . 37
8.7 Isolating transformers . 37
9 Conductive electrical interface requirements . 37
9.1 General . 37
9.2 Functional description of standard accessories . 37
9.3 Functional description of the basic interface . 38
9.4 Functional description of the universal interface . 38
9.5 Functional description of the DC interface . 38
9.6 Functional description of the combined interface . 38
9.7 Wiring of the neutral conductor . 38
10 Requirements for adaptors . 39
11 Cable assembly requirements . 39
11.1 General . 39
11.2 Electrical rating . 39
11.3 Dielectric withstand characteristics . 40
11.4 Construction requirements . 40
11.5 Cable dimensions . 40
11.6 Strain relief . 40
11.7 Cable management and storage means for cables assemblies . 40
12 EV supply equipment constructional requirements and tests . 41
12.1 General . 41
12.2 Characteristics of mechanical switching devices . 41
12.2.1 General . 41
12.2.2 Switch and switch-disconnector . 41
12.2.3 Contactor . 42
12.2.4 Circuit-breaker . 42
12.2.5 Relays . 42
12.2.6 Inrush current . 42
12.2.7 Residual direct current monitoring device (RDC MD) . 42
12.3 Clearances and creepage distances . 42
12.4 IP degrees . 43
12.4.1 Degrees of protection against solid foreign objects and water for the
enclosures . 43
12.4.2 Degrees of protection against solid foreign objects and water for basic,
universal and combined and DC interfaces . 43
12.5 Insulation resistance . 44
12.6 Touch current . 44
12.7 Dielectric withstand voltage . 45
12.7.1 AC withstand voltage . 45
12.7.2 Impulse dielectric withstand (1,2 µs/50 µs) . 45
12.8 Temperature rise . 45
12.9 Damp heat functional test . 46
12.10 Minimum temperature functional test . 46
12.11 Mechanical strength . 46
13 Overload and short-circuit protection . 46
13.1 General . 46
13.2 Overload protection of the cable assembly . 47
13.3 Short-circuit protection of the charging cable . 47

– 4 – IEC 61851-1:2017  IEC 2017
14 Automatic reclosing of protective devices . 47
15 Emergency switching or disconnect (optional) . 48
16 Marking and instructions . 48
16.1 Installation manual of EV charging stations . 48
16.2 User manual for EV supply equipment . 49
16.3 Marking of EV supply equipment . 49
16.4 Marking of charging cable assemblies case B . 49
16.5 Durability test for marking . 50
Annex A (normative) Control pilot function through a control pilot circuit using a PWM
signal and a control pilot wire. 51
A.1 General . 51
A.2 Control pilot circuit . 51
A.2.1 General . 51
A.2.2 Typical control pilot circuit . 52
A.2.3 Simplified control pilot circuit . 53
A.2.4 Additional components and high frequency signals . 53
A.3 Requirements for parameters and system behaviour . 54
A.4 Test procedures . 72
A.4.1 General . 72
A.4.2 Constructional requirements of the EV simulator . 72
A.4.3 Test procedure . 72
A.4.4 Oscillator frequency and generator voltage test . 73
A.4.5 Duty cycle test . 73
A.4.6 Pulse wave shape test . 74
A.4.7 Sequences test . 74
A.4.8 Test of interruption of the protective conductor . 76
A.4.9 Test of short-circuit values of the voltage . 76
A.4.10 Example of a test simulator of the vehicle (informative) . 76
A.4.11 Optional hysteresis test . 79
A.5 Implementation hints . 80
A.5.1 Retaining a valid authentication until reaching CP State B . 80
A.5.2 Load control using transitions between state x1 and x2 . 81
A.5.3 Information on difficulties encountered with some legacy EVs for wake-
up after a long period of inactivity (informative) . 81
Annex B (normative) Proximity detection and cable current coding circuits for the
basic interface . 82
B.1 Circuit diagram for vehicle couplers using an auxiliary switch associated with
the proximity detection contact . 82
B.2 Circuit for simultaneous proximity detection and current coding . 83
Annex C (informative) Examples of circuit diagrams for a basic and universal vehicle
couplers . 86
C.1 General . 86
C.2 Circuits diagrams for Mode 1, Mode 2 and Mode 3, using a basic single
phase vehicle coupler . 86
C.3 Circuits diagrams for Mode 3, using a basic single phase or three-phase
accessory without proximity switch . 90
C.4 Example of circuit diagram for Mode 4 connection using universal coupler . 91
Annex D (informative) Control pilot function that provides LIN communication using
the control pilot circuit . 93
D.1 Overview. 93

D.1.1 General . 93
D.1.2 LIN-CP features . 93
D.1.3 Normative references . 93
D.1.4 Terms and abbreviations . 94
D.2 Scope and context . 94
D.3 Overview of control pilot functions . 96
D.4 Control pilot circuit . 97
D.4.1 General . 97
D.4.2 Control pilot circuit . 97
D.4.3 Charging station control pilot circuit interface . 98
D.4.4 EV control pilot circuit interface . 99
D.4.5 LIN communication transceiver . 99
D.4.6 Optional cable assembly node . 100
D.5 Control pilot circuit interaction . 100
D.5.1 General . 100
D.5.2 Control pilot circuit states and transitions . 101
D.6 System requirements . 102
D.6.1 General . 102
D.6.2 Control of LIN signals . 102
D.6.3 Control of the S2 switch and the vehicle load current . 103
D.6.4 Control of the switching device in the charging station . 103
D.6.5 Control of latching and unlatching of IEC 62196-2 type 2 socket-outlets
and vehicle inlets . 104
D.7 Charging sequences . 105
D.7.1 General . 105
D.7.2 Start-up of normal AC charging sequence . 105
D.7.3 Normal EV-triggered stop of charging . 107
D.7.4 Normal stop of charging triggered by charging station. 109
D.8 LIN Communication . 110
D.8.1 General . 110
D.8.2 Schedules. 110
D.8.3 Frames . 117
D.8.4 Signals . 120
D.9 Requirements for charging stations and EVs that implement both LIN-CP
and PWM-CP . 128
D.9.1 General . 128
D.9.2 Interoperability between charging stations and EVs . 128
D.9.3 Control pilot circuit hardware . 129
D.9.4 Control pilot circuit functionality . 129
D.9.5 Sequence to select LIN-CP or PWM-CP after plug-in . 130
D.10 Procedures for test of charging stations . 131
D.10.1 General . 131
D.10.2 Test of normal use . 131
D.10.3 Test of disconnection under load . 131
D.10.4 Overcurrent test . 132
D.10.5 Test of interruption of LIN communication . 132
D.10.6 Test of short circuit between the control pilot conductor and the
protective conductor . 132
D.10.7 Test of options . 132

– 6 – IEC 61851-1:2017  IEC 2017
Annex E (informative) Charging station designed with a standard socket-outlet –
Minimum gap for connection of Modes 1 and 2 cable assembly . 133
E.1 Overview. 133
E.2 General . 133
E.3 Minimum gap for connection of Mode 2 cables with type E/F plug and
socket-outlet systems . 134
E.4 Minimum gap for connection of Mode 2 cables with type BS1363 plug and
socket-outlet systems . 134
E.5 Minimum gap for connection of Mode 2 cables with IEC 60309-2 straight
plug and socket-outlet systems . 134
Bibliography . 136

Figure 1 – Case A connection . 18
Figure 2 – Case B connection . 18
Figure 3 – Case C connection . 19
Figure A.1 – Typical control pilot circuit (equivalent circuit) . 52
Figure A.2 – Simplified control pilot circuit (equivalent circuit) . 53
Figure A.3 – State diagram for typical control pilot (informative) . 60
Figure A.4 – State diagram for simplified control pilot (informative) . 61
Figure A.5 – Test sequence using a typical control pilot circuit. 75
Figure A.6 – Test sequence using the simplified control pilot circuit . 75
Figure A.7 – Optional test sequence with interruption by EV supply equipment . 76
Figure A.8 – Example of a test circuit (EV simulator) . 78
Figure B.1 – Equivalent circuit diagram for proximity function using an auxiliary switch
and no current coding . 82
Figure B.2 – Equivalent circuit diagram for simultaneous proximity detection and
current coding . 84
Figure C.1 – Example of Mode 1 case B using the proximity circuit as in B.1 . 87
Figure C.2 – Example of Mode 2 case B using proximity detection as in B.1 . 88
Figure C.3 – Example of Mode 3 case B using proximity detection as in B.1 . 89
Figure C.4 – Example of Mode 3 case C using proximity detection as in B.1 . 90
Figure C.5 – Example of Mode 3 case B using proximity detection as in B.2 (without
proximity push button switch S3) . 91
Figure C.6 – Example of Mode 4 case C using the universal vehicle coupler . 92
Figure D.1 – Example of an EV charging system with a typical configuration of
functions, information flow and power flow . 95
Figure D.2 – Electrical equivalent circuit for connection of LIN nodes to the control pilot
circuit . 98
Figure D.3 – Control pilot circuit state diagram for LIN-CP (key list in Table D.5) . 101
Figure D.4 – Example of timing diagram for start-up of normal AC charging sequence . 105
Figure D.5 – Timing diagram for normal EV-triggered stop of charging . 107
Figure D.6 – Example of timing diagram for normal stop of charging triggered by
charging station . 109
Figure D.7 – State diagram of the LIN node in the charging station . 111
Figure D.8 – Energy transfer between different charging stations and EVs that are
equipped with accessories according to IEC 62196-2 . 129

Figure D.9 – Control pilot circuit state diagram for LIN-CP and PWM-CP (See key list
in Table D.5) . 130
Figure E.1 – Examples of standard plugs that are considered for this Annex E . 133
Figure E.2 – Packaging configurations allowing the use of a large part of the common
products for standard plugs and socket-outlets . 135

Table 1 – Touch current limits . 44
Table A.1 – Maximum allowable high frequency signal voltages on control pilot
conductor and the protective conductor . 54
Table A.2 – Control pilot circuit parameters and values for the EV supply equipment . 55
Table A.3 – EV control pilot circuit values and parameters and values for the EV . 56
Table A.4 – System states detected by the EV supply equipment . 57
Table A.5 – State behaviour . 59
Table A.6 – List of sequences . 61
Table A.7 – PWM duty cycle provided by EV supply equipment . 71
Table A.8 – Maximum current to be drawn by vehicle . 71
Table A.9 – Test resistance values . 72
Table A.10 – Parameters of control pilot voltages . 73
Table A.11 – Test parameters of control pilot signals . 74
Table A.12 – Parameters for sequence tests . 75
Table A.13 – Position of switches . 79
Table A.14 – Initial settings of the potentiometer at the beginning of each test. 79
Table B.1 – Component values proximity circuit without current coding . 83
Table B.2 – Current coding resistor for EV plug and vehicle connector . 85
Table C.1 – Component description for Figure C.6 Mode 4 case C . 92
Table D.1 – Control pilot functions in LIN-CP and PWM-CP . 96
Table D.2 – Additional LIN-CP control pilot functions . 97
Table D.3 – Generation and detection of CP voltage levels . 99
Table D.4 – Generation and detection of LIN communication levels . 100
Table D.5 – Key list for Figure D.3 and Figure D.9 . 102
Table D.6 – Control of LIN signals . 103
Table D.7 – Control of the S2 switchand the vehicle load . 103
Table D.8 – Control of the switching device . 104
Table D.9 – Control of latching and unlatching . 104
Table D.10 – Timing for start-up of normal charging sequence . 106
Table D.11 – Timing for normal EV-triggered stop of charging . 108
Table D.12 – Timing for normal stop of charging triggered by charging station . 110
Table D.13 – States of the LIN node in the charging station and frame schedule
description . 112
Table D.14 – Transitions of the LIN node in the charging station . 113
Table D.15 – Frames for AC charging . 118
Table D.16 – General signals . 125
Table D.17 – Signals for version negotiation . 125
Table D.18 – Signals for system initialization . 126

– 8 – IEC 61851-1:2017  IEC 2017
Table D.19 – Signals for EV status information . 127
Table D.20 – Signals for charging station status information . 127
Table D.21 – Codes for the frame StNotReadyList . 127
Table D.22 – Codes for frame EvS2openList . 128
Table D.23 – Codes for frame StErrorList . 128
Table D.24 – Codes for frame EvErrorList . 128
Table D.25 – Normal charge cycle test . 131

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRIC VEHICLE CONDUCTIVE CHARGING SYSTEM –

Part 1: General requirements
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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International Standard IEC 61851-1 has been prepared by IEC technical committee 69:
Electric road vehicles and electric industrial trucks.
This third edition cancels and replaces the second edition published in 2010. It constitutes a
technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) The contents of IEC 61851-1:2010 have been re-ordered. Numbering of clauses has
changed as new clauses were introduced and some contents moved for easy reading. The
following lines give an insight to the new ordering in addition to the main technical
changes.
b) All requirements from IEC 61851-22 have been moved to this standard, as work on
IEC 61851-22 has ceased.
– 10 – IEC 61851-1:2017  IEC 2017
c) Any requirements that concern EMC have been removed from the text and are expected
to be part of the future version of 61851-21-2 .
d) Clause 4 contains the original text from IEC 61851-1:2010 and all general requirements
from Clause 6 of IEC 61851-1:2010.
e) Clause 5 has been introduced to provide classifications for EV supply equipment.
f) Previous general requirements of Clause 6 have been integrated into Clause 4. Clause 6
contains all Mode descriptions and control requirements. Specific requirements for the
combined use of AC and DC
...