ISO 5474-2:2024

Electrically propelled road vehicles — Functional and safety requirements for power transfer between vehicle and external electric circuit — Part 2: AC power transfer

This document in combination with ISO 5474-1 specifies requirements for conductive power transfer using alternating current (AC) with a voltage up to 1 000 V a.c. between electrically-propelled road vehicles and external electric circuits. NOTE External electric circuits are not part of the vehicle. This document provides requirements for conductive charging in modes 2, 3 according to IEC 61851-1 and reverse power transfer. This document applies to vehicle power supply circuits. Examples of circuit diagrams for different configurations of chargers on-board electric vehicles are shown in Annex A. This document also provides requirements for reverse power transfer through on-board standard socket-outlets and/or a EV plug or vehicle inlet according to IEC 62196-1 or IEC 62196-2 conductively connected to the vehicle power supply circuit. Requirements for AC power transfer using a charger without at least simple separation are under consideration. This document does not provide: — requirements for simultaneous operation of multiple EV plugs or vehicle inlets and — requirements for power transfer while driving (electric road systems) but they are under consideration. This document does not provide: — requirements for mopeds and motorcycles (which are specified in ISO 18246); — comprehensive safety information for manufacturing, maintenance and repair personnel; — requirements for vehicle to load adapters.

Véhicules routiers à propulsion électrique — Exigences fonctionnelles et exigences de sécurité pour le transfert de puissance entre le véhicule et le circuit électrique externe — Partie 2: Transfert de puissance AC

General Information

• Status: Published
• Publication Date: 06-Jun-2024
• ICS: 43.120 - Electric road vehicles
• Technical Committee: ISO/TC 22/SC 37 - Electrically propelled vehicles
• Drafting Committee: ISO/TC 22/SC 37 - Electrically propelled vehicles
• Current Stage: 9093 - International Standard confirmed
• Due Date: 06-Dec-2024
• Completion Date: 06-Dec-2024

Standards Content (Sample)

International
Standard
ISO 5474-2
First edition
Electrically propelled road
2024-06
vehicles — Functional and safety
requirements for power transfer
between vehicle and external
electric circuit —
Part 2:
AC power transfer
Véhicules routiers à propulsion électrique — Exigences
fonctionnelles et exigences de sécurité pour le transfert de
puissance entre le véhicule et le circuit électrique externe —
Partie 2: Transfert de puissance AC
Reference number
© ISO 2024
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Published in Switzerland
ii
Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 System architecture . 3
5 Environmental and operational conditions . 6
6 Safety requirements. 6
6.1 General .6
6.2 Protection of persons against electric shock .6
6.2.1 General .6
6.2.2 Compatibility with external safety devices .7
6.2.3 Insulation resistance .7
6.2.4 Touch current .7
6.2.5 Insulation coordination.7
6.2.6 Protective conductor .7
6.2.7 Basic protection when connected to an external electric circuit .7
6.2.8 Requirements for unmated vehicle contacts .7
6.3 Protection against thermal incident .8
6.3.1 Requirements for normal operation .8
6.3.2 Overcurrent protection .8
6.3.3 Residual energy after disconnection related to thermal incident .8
6.3.4 Arc protection .9
6.4 Vehicle movement .9
6.5 AC or DC electric power at the same contacts .9
7 Electromagnetic compatibility . 9
8 Protection in case of unintended power transfer . 9
9 Functional requirements . 9
9.1 Voltage and frequency ranges for normal operation .9
9.2 Inrush current .9
9.3 Load current .10
9.4 Active factor .10
9.5 Phase order and number of phases in three-phase operation .11
9.6 Requirements for the plug and cable .11
9.7 Requirements for the vehicle inlet . 12
9.8 Compatibility with self test functions of EV supply equipment . 12
10 Additional requirements for reverse power transfer .12
10.1 General . 12
10.2 Safety requirements . 12
10.2.1 General . 12
10.2.2 Reverse power transfer in grid forming mode to unearthed external circuit
(vehicle to load) . 12
10.2.3 Reverse power transfer in grid following mode to earthed external circuit
(vehicle to grid) . 15
10.2.4 Reverse power transfer in grid forming mode to earthed external circuit
(vehicle to home) . 15
10.3 Functional requirements . . 15
10.3.1 General . 15
10.3.2 Reverse power transfer in grid forming mode . 15
10.3.3 Reverse power transfer in grid following mode .16
11 Requirements for power transfer to on-board standard socket-outlets .16
11.1 General .16

iii
11.2 Protective conductor .16
11.3 Insulation resistance.16
12 Owner’s manual and marking . 16
13 Test procedure .16
13.1 General .16
13.2 Resistance of protective conductor .17
13.3 Insulation resistance.17
13.4 Withstand voltage test .17
13.5 Measurement of touch current .17
13.6 Inrush current test . . 20
13.6.1 General . 20
13.6.2 Measurement .21
Annex A (informative) Examples of circuit diagrams for different configurations of chargers
on-board an electric vehicle .22
Bibliography .28

iv
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out through
ISO technical committees. Each member body interested in a subject for which a technical committee
has been established has the right to be represented on that committee. International organizations,
governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely
with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are described
in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the different types
of ISO document should be noted. This document was drafted in
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