ISO 6469-3:2018

INTERNATIONAL ISO
STANDARD 6469-3
Third edition
2018-10
Electrically propelled road vehicles —
Safety specifications —
Part 3:
Electrical safety
Véhicules routiers électriques — Spécifications de sécurité —
Partie 3: Sécurité électrique
Reference number
©
ISO 2018
© ISO 2018
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ii © ISO 2018 – All rights reserved

Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Voltage classes . 6
5 General requirements . 6
5.1 Environmental and operational requirements . 6
5.2 Marking . 6
5.2.1 Marking of voltage class B electric components. 6
5.2.2 Marking of voltage class B wiring . 7
6 Requirements for protection of persons against electric shock . 7
6.1 General requirements . 7
6.1.1 General requirements for connected sections of a circuit . 7
6.1.2 General requirements for voltage class B1 . 7
6.1.3 General requirements for voltage class B2 . 8
6.2 Basic protection . 8
6.3 Fault protection and additional measures . 8
6.3.1 Equipotential bonding . 8
6.3.2 Isolation resistance . 8
6.3.3 Provisions for capacitive coupling and capacitive discharge .10
6.3.4 De-energization .10
6.3.5 Alternative protection measures .11
6.4 General requirements for protective provisions .11
6.4.1 General.11
6.4.2 Requirements for insulation .11
6.4.3 Requirements for protective barriers and protective enclosures .11
6.4.4 Requirements for connectors .12
6.4.5 Insulation Coordination .12
6.5 Alternative approach for protection against electric shock .12
7 Protection against thermal incidents .13
7.1 Overload protection .13
7.2 Short-circuit protection .13
8 Requirements for vehicle power supply circuit .13
9 Owner's manual .13
10 Test procedures .13
10.1 General .13
10.2 Continuity test for equipotential bonding .13
10.3 Isolation resistance measurements for voltage class B2 electric circuits .14
10.3.1 Preconditioning and conditioning .14
10.3.2 Isolation resistance measurements of the balance of electric circuits .14
10.3.3 Isolation resistance measurement of the voltage class B2 electric power
sources .15
10.3.4 Isolation resistance measurement of entire electric circuits .17
10.4 Test for isolation resistance monitoring system .17
10.5 Touch current .17
10.6 Withstand voltage test .18
10.6.1 General.18
10.6.2 Preconditioning and conditioning .18
10.6.3 Test procedure .19
10.6.4 Test criteria .19
Bibliography .20
iv © ISO 2018 – All rights reserved

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 documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2. www .iso .org/directives
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received. www .iso .org/patents
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the WTO
principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary
information.
This document was prepared by Technical Committee ISO/TC 22 Road vehicles, Subcommittee SC 37,
Electrically propelled vehicles.
This third edition cancels and replaces the second edition (ISO 6469-3:2011), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— extension of pure electric shock protection to all electric safety requirements including those
against thermal incidents;
— introduction of definitions and requirements for new voltage classes B1 and B2;
— addition of specific requirements for capacitive discharge;
— new test specification for the isolation resistance monitoring system; and
— new requirements and test for touch current.
INTERNATIONAL STANDARD ISO 6469-3:2018(E)
Electrically propelled road vehicles — Safety
specifications —
Part 3:
Electrical safety
IMPORTANT — The electronic file of this document contains colours which are considered to be
useful for the correct understanding of the document. Users should therefore consider printing
this document using a colour printer.
1 Scope
This document specifies electrical safety requirements for voltage class B electric circuits of electric
propulsion systems and conductively connected auxiliary electric systems of electrically propelled
road vehicles.
It specifies electrical safety requirements for protection of persons against electric shock and thermal
incidents.
It does not provide comprehensive safety information for manufacturing, maintenance and repair
personnel.
NOTE 1 Electrical safety requirements for post-crash are described in ISO 6469-4.
NOTE 2 Electrical safety requirements for conductive connections of electrically propelled road vehicles to an
external electric power supply are described in ISO 17409.
NOTE 3 Specific electrical safety requirements for magnetic field wireless power transfer between an external
electric power supply and an electrically propelled vehicle are described in ISO PAS 19363.
NOTE 4 Electrical safety requirements for motorcycles and mopeds are described in ISO 13063.
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.
ISO 7010, Graphical symbols — Safety colours and safety signs — Registered safety signs
ISO 17409, Electrically propelled road vehicles — Connection to an external electric power supply — Safety
requirements
ISO 20653, Road vehicles — Degrees of protection (IP code) — Protection of electrical equipment against
foreign objects, water and access
IEC 60664 (all parts), Insulation coo
...