Road vehicles -- Electrical disturbances from conduction and coupling

ISO 7637-1:2015 defines the basic terms relating to electrical disturbances from conduction and coupling used in the other parts of ISO 7637. It also gives general information on the whole ISO 7637 series.

Véhicules routiers -- Perturbations électriques par conduction et par couplage

General Information

Status
Published
Publication Date
19-Oct-2015
Current Stage
9092 - International Standard to be revised
Start Date
18-Jun-2021
Ref Project

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INTERNATIONAL ISO
STANDARD 7637-1
Third edition
2015-10-01
Road vehicles — Electrical
disturbances from conduction and
coupling —
Part 1:
Definitions and general
considerations
Véhicules routiers — Perturbations électriques par conduction et
par couplage —
Partie 1: Définitions et généralités
Reference number
ISO 7637-1:2015(E)
ISO 2015
---------------------- Page: 1 ----------------------
ISO 7637-1:2015(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2015, Published in Switzerland

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ii © ISO 2015 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 7637-1:2015(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 General aim and practical use of ISO 7637................................................................................................................................ 4

5 General test conditions .................................................................................................................................................................................. 5

5.1 General ........................................................................................................................................................................................................... 5

5.2 Test temperature ................................................................................................................................................................................... 5

5.3 Supply voltage ......... ................................................................................................................................................................................. 6

Annex A (normative) Function performance status classification (FPSC) .................................................................... 7

Bibliography .............................................................................................................................................................................................................................10

© ISO 2015 – All rights reserved iii
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ISO 7637-1:2015(E)
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 (see 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 (see 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 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.

The committee responsible for this document is ISO/TC 22, Road vehicles, Subcommittee SC 32, Electrical

and electronic components and general system aspects.

This third edition cancels and replaces the second edition (ISO 7637-1:2002), which has been technically

revised. It also incorporates the Amendment ISO 7637-1:2002/Amd 1: 2008.

ISO 7637 consists of the following parts, under the general title Road vehicles — Electrical disturbances

from conduction and coupling:
— Part 1: Definitions and general considerations
— Part 2: Electrical transient conduction along supply lines only

— Part 3: Electrical transient transmission by capacitive and inductive coupling via lines other than supply

lines
The following parts are under preparation:

— Part 4: Electrical transient conduction along shielded high voltage supply lines only

— Part 5: Enhanced definitions and verification methods for harmonization of pulse generators according

to ISO 7637–2 [Technical Report]
Annex A forms an integral part of this part of ISO 7637.
iv © ISO 2015 – All rights reserved
---------------------- Page: 4 ----------------------
ISO 7637-1:2015(E)
Introduction

Electrical and radio-frequency disturbances occur during normal operation of many items of motor

vehicle equipment. They are generated over a wide frequency range and can be distributed to on-board

electronic devices and systems by conduction, coupling or radiation.

In recent years, an increasing number of electronic devices for controlling, monitoring and displaying a

variety of functions have been introduced into vehicle designs. It is necessary to consider the electrical

and electromagnetic environment in which these devices operate and, in particular, the disturbances

generated in the vehicle electrical system itself. Such disturbances can cause degradation (temporary

malfunction or even permanent damage) of the electronic equipment. Moreover, “worst-case” situations

are usually those resulting from disturbances generated inside the vehicle by, for example, ignition

systems, generator and alternator systems, electric motors and actuators.

Annex A specifies a general method for function performance status classification (FPSC). Typical

severity levels are included in an annex of each of the other parts of ISO 7637.

While narrowband signals generated on or outside the vehicle (by broadcasting and radio-transmitters)

can also affect the performance of electronic devices, and recognizing that protection from such

potential disturbances has to be considered as part of total system certification, these matters are

nevertheless outside the scope of ISO 7637 and are not covered by it.

ISO 11451 and ISO 11452 specify test methods for immunity to radiated disturbances for vehicles

and for components, respectively. ISO 10605 specifies test methods for immunity to electrostatic

discharge (ESD) for vehicle and for components.
© ISO 2015 – All rights reserved v
---------------------- Page: 5 ----------------------
INTERNATIONAL STANDARD ISO 7637-1:2015(E)
Road vehicles — Electrical disturbances from conduction
and coupling —
Part 1:
Definitions and general considerations
1 Scope

This part of ISO 7637 defines the basic terms relating to electrical disturbances from conduction and

coupling used in the other parts of ISO 7637. It also gives general information on the whole ISO 7637 series.

2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For dated references, only the edition cited applies. For undated

references, the latest edition of the referenced document (including any amendments) applies.

IEC 60050–151, International Electrotechnical Vocabulary — Part 151: Electrical and magnetic devices

3 Terms and definitions

For the purposes of this document, the terms and definitions given in IEC 60050–151 and the

following apply.
3.1
artificial network

network inserted in the supply lead or signal/load lead of apparatus to be tested which provides, in a

given frequency range, a specified load impedance for the measurement of disturbance voltages and

which can isolate the apparatus from the supply or signal sources/loads in that frequency range

Note 1 to entry: Network inserted in the d.c. power lines of the DUT which provides, in a given frequency range, a

specified load impedance and which isolates the DUT from the d.c. power supply in that frequency range.

3.2
burst
transient comprised of a complex series of transient voltage variations

Note 1 to entry: For bursts, in addition to the parameters given in the definitions; 3.2.1, 3.2.2 and 3.2.3 are also

relevant. For an illustration of a burst transient waveform, see ISO 7637–2.
3.2.1
burst cycle time
time between the start of the first pulse (3.13) of two consecutive bursts (3.2)
3.2.2
burst duration

time during which a complex series of transient voltage variations occurs during a single burst (3.2)

3.2.3
time between bursts
time between the end of one burst (3.2) and the start of the next one
© ISO 2015 – All rights reserved 1
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ISO 7637-1:2015(E)
3.3
coupling
means or device for transferring power between systems

Note 1 to entry: For coupling, in addition to the parameters given in the definitions; 3.3.1 and 3.3.2 are also relevant.

[SOURCE: IEC 60050–726–14–01, modified]
3.3.1
coupling clamp

device of defined dimensions and electromagnetic characteristics designed for common-mode coupling

(3.3) of the disturbance transient to the circuit under test without any galvanic connection to it

3.3.1.1
capacitive coupling clamp
CCC

special fixture that facilitates capacitive coupling (3.3) of fast transient test pulses (3.15) into signal lines

under test without any galvanic connection to the terminals of the circuits, or any other part of the DUT

3.3.1.2
inductive coupling clamp
ICC

bulk current injection (BCI) type probe to provide the means of coupling (3.3) slow transient test pulses

(3.15) into signal lines under test without any galvanic connection to the terminals of the circuits, or

any other part of the DUT
3.3.2
coupling network

electrical circuit for the purpose of transferring energy from one circuit to another

3.3.3
direct capacitive coupling
DCC

method using discrete, non-polarized capacitor to couple fast and slow transient test pluses into the

DUT’s signal lines under test
3.4
degradation

〈of performance〉 undesired departure in the operational performance of any device, equipment or

system from its intended performance

Note 1 to entry: The term “degradation” can apply to temporary or permanent failure.

[SOURCE: IEC 60050-161-01-19]
3.5
electromagnetic compatibility
EMC

ability of an equipment or system to function satisfactorily in its electromagnetic environment without

introducing intolerable electromagnetic disturbances (3.6) to anything in that environment

[SOURCE: IEC 60050-161-01-07]
3.6
electromagnetic disturbance

any electromagnetic phenomenon which can degrade the performance of a device, equipment or system,

or adversely affect living or inert matter

Note 1 to entry: An electromagnetic disturbance may be an electromagnetic noise, an unwanted signal or a

change in the propagation medium itself.
[SOURCE: IEC 60050-161-01-05]
2 © ISO 2015 – All rights reserved
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ISO 7637-1:2015(E)
3.7
electromagnetic interference
EMI

degradation (3.4) of the performance of equipment, transmission channel or system caused by an

electromagnetic disturbance (3.6)

Note 1 to entry: The English words “interference” and “disturbance” are often used indiscriminately.

[SOURCE: IEC 60050-161-01-06, modified]
3.8
electromagnetic radiation

phenomenon by which energy in the form of electromagnetic waves emanates from a source into space;

energy transferred through space in the form of electromagnetic waves

Note 1 to entry: By extension, the term “electromagnetic radiation” sometimes also covers induction phenomena.

[SOURCE: IEC 60050-731-01-01, modified]
3.9
susceptibility
〈elec
...

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