ISO 16750-1:2023
(Main)Road vehicles — Environmental conditions and testing for electrical and electronic equipment — Part 1: General
Road vehicles — Environmental conditions and testing for electrical and electronic equipment — Part 1: General
This document applies to electric and electronic systems and components for vehicles including electric propulsion systems and components with maximum working voltages according to voltage class B. It describes the potential environmental stresses and specifies tests and requirements for the specific mounting location on/in the vehicle. This document contains the terminology for the ISO 16750 series and general requirements. This document is not intended to apply to environmental requirements or testing for systems and components of motorcycles and mopeds. Electromagnetic compatibility (EMC) is not covered by this document. Systems and their components released for production, or systems and their components already under development prior to the publication date of this document, can be exempted from fulfilling the changes in this edition compared to the previous one.
Véhicules routiers — Spécifications d'environnement et essais de l'équipement électrique et électronique — Partie 1: Généralités
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 16750-1
Fourth edition
2023-07
Road vehicles — Environmental
conditions and testing for electrical
and electronic equipment —
Part 1:
General
Véhicules routiers — Spécifications d'environnement et essais de
l'équipement électrique et électronique —
Partie 1: Généralités
Reference number
© ISO 2023
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Published in Switzerland
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Classification by mounting location .5
4.1 Engine/electric motor compartment . 5
4.2 Passenger compartment . 6
4.3 Luggage compartment/load compartment . 6
4.4 Mounting on exterior/in cavities . 6
4.5 Other mounting location . 7
5 Operating modes . 7
5.1 General . 7
5.2 Operating mode 1 . 9
5.3 Operating mode 2 . 9
5.4 Operating mode 3 . 10
5.5 Operating mode 4 . 10
6 Functional status classification .10
6.1 General . 10
6.2 Class A . 11
6.3 Class B . 11
6.4 Class C . 11
6.5 Class D . 11
6.6 Class E . . 11
7 Tests and requirements .11
7.1 General . 11
7.2 General test conditions . 11
7.3 Test sequence .12
7.4 Test setup .12
7.5 Test procedure .12
7.6 Parameter check . 13
7.7 Physical analysis (visual inspection) . 13
8 Designation .13
8.1 Coding . 13
8.2 Use of Code Z “as agreed” . 14
Annex A (informative) Example of a test plan .16
Annex B (informative) Example of life test/reliability statement .17
Annex C (informative) Example of component mass classification .21
Bibliography .22
iii
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 accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use
of (a) patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed
patent rights in respect thereof. As of the date of publication of this document, ISO had not received
notice of (a) patent(s) which may be required to implement this document. However, implementers are
cautioned that this may not represent the latest information, which may be obtained from the patent
database available at www.iso.org/patents. ISO shall not be held responsible for identifying any or all
such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of 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 World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 32,
Electrical and electronic components and general system aspects.
This fourth edition cancels and replaces the third edition (ISO 16750-1:2018), which has been
technically revised.
The main changes are as follows:
— integrating and harmonizing contents from ISO 19453-1:2018, (e.g. addition of 5.5);
— integrating terms from ISO 19453-1:2018 and addition of terms considering common terms in
ISO 16750 series;
— modification to subdivide mounting locations matching with climate load tests of ISO 16750-4;
— addition of operating modes for 48 V DUT and voltage class B DUT (Clause 5);
— reorganization of operating mode tables for easy understanding (Clause 5);
— clarification of test procedure regarding parameter check and physical analysis (7.6, 7.7);
— update of coding system integrating voltage class A DUT and voltage class B DUT (Clause 8);
— definition of mass and volume classes related to mechanical and climatic loads (Annex C).
A list of all parts in the ISO 16750 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
Introduction
The purpose of the ISO 16750 series is to assist its user in systematically defining and/or applying a set
of internationally accepted environmental conditions, tests and operating requirements based on the
anticipated actual environment in which the equipment will be operated in and exposed to during its
life cycle.
NOTE This edition of the ISO 16750 series (2023) does not contain electrical testing conditions or
requirements in ISO 16750-2 for the voltage class B circuits of voltage class B components as well as 48 V circuits
of 48 V components. For electrical testing conditions or requirements for voltage class B components and 48 V
circuits of 48 V components, see instead the ISO 21498 series (voltage class B components) and ISO 21780 (48 V
components).
The following environmental factors have been considered in the development of this document.
— World geography and climate
Road vehicles are operated in nearly all land regions of the earth. Significant variations in environmental
conditions due to climatic environment, including diurnal and seasonal cycles, can therefore be
expected. Consideration has been given to worldwide ranges in temperature, humidity, precipitation
and atmospheric conditions including dust, pollution and altitude.
— Type of vehicle
Environmental conditions in and on road vehicles can depend on vehicle design attributes, such as
whether to equip an internal combustion engine and/or an electric motor for vehicle propulsion, vehicle
mass, vehicle size, electrical supply voltage and so on. Considerations have been given to typical series
production vehicles, including passenger cars, light duty trucks and commercial (heavy) buses and
trucks not only propelled by diesel or gasoline engines but also propelled by electric motors. These
considerations include hybrid electric vehicles, battery electric vehicles, range extender hybrid electric
vehicles and fuel cell vehicles, but does not include the equipment specific for fuel cell systems.
— Vehicle use conditions and operating modes
Environmental conditions in and on the vehicle vary significantly with road quality, types of road
surface, road topography, vehicle use (e.g. commuting, towing, cargo transport, etc.) and
...
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