ISO 11452-4:1995
(Main)Road vehicles — Electrical disturbances by narrowband radiated electromagnetic energy — Component test methods — Part 4: Bulk current injection (BCI)
Road vehicles — Electrical disturbances by narrowband radiated electromagnetic energy — Component test methods — Part 4: Bulk current injection (BCI)
Véhicules routiers — Perturbations électriques par rayonnement d'énergie électromagnétique en bande étroite — Méthodes d'essai d'un composant — Partie 4: Méthode d'injection de courant (BCI)
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Standards Content (Sample)
INTERNATIONAL IS0
STANDARD
11452-4
First edition
1995-12-01
Road vehicles - Electrical disturbances
by narrowband radiated electromagnetic
- Component test methods -
energy
Part 4:
Bulk current injection (BCI)
Whicules routiers - Perturbations Blectriques par rayonnemen t d’bnergie
Blectromagn&ique en bande &roite - M6thodes d’essai d’un
composan t -
Partie 4: M&hode d’injection de courant (WI)
Reference number
IS0 11452-4:1995(E)
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IS0 11452=4:1995(E)
Contents
Page
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1 Scope
1
2 Normative references . . . . . . . . . . . . . .*.
1
3 Test conditions . . . . . . . . . . . . . . . . . . . . . . . . . . .~.
1
3.1 Test temperature and supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 Frequency range . 2
3.3 Modulation . 2
3.4 Dwell time . 2
.............................................................. 2
3.5 Frequency step sizes
................................................................. 2
3.6 Test severity levels
Test instrument description and specification . 2
4
2
4.1 BCI system .
2
4.2 Instrumentation .
4.3 Test set-up . 3
.......................................................................... 4
5 Test procedure
................................................................................. 4
5.1 Test plan
4
5.2 Test methods .
5
5.3 Test report .
Annexes
6
A Current injection probe calibration procedure .
.......................... 8
B Current monitoring probe calibration method
................. 9
C Function performance status classification (FPSC)
0 IS0 1995
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-1211 Geneve 20 l Switzerland
Printed in Switzerland
ii
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0 IS0
IS0 11452=4:1995(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide
federation of national standards bodies (IS0 member bodies). The work
of preparing International Standards is normally carried out through IS0
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. IS0
collaborates closely with the International Electrotechnical Commission
(IEC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard IS0 11452-4 was prepared by Technical Committee
lSO/TC 22, Road vehicles, Subcommittee SC 3, Electrical and electronic
equipment.
IS0 11452 consists of the following parts, under the general title Road
vehicles - Electrical disturbances by narrowband radiated electro-
magnetic energy - Component test methods:
- Part I: General and definitions
- Part 2: Absorber-lined chamber
- Part 3: Transverse electromagnetic mode (TEM) cell
- Part 4: Bulk current injection (BCI)
- Part 5: Stripline
- Part 6: Parallel plate antenna
- Part 7: Direct radio frequency (RF) power injection
Annexes A and B form an integral part of this part of IS0 11452. Annex
C is for information only.
. . .
III
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IS0 11452=4:1995(E)
INTERNATIONAL STANDARD 0 IS0
- Electrical disturbances
Road vehicles
by narrowband radiated electromagnetic energy -
Component test methods -
Part 4:
Bulk current injection (BCI)
IEC and IS0 maintain registers of currently valid
1 Scope
International Standards.
This part of IS0 11452 specifies bulk current injection
IS0 7637-l :I 990, Road vehicles - Electrical disturb-
(BCI) tests for the electromagnetic immunity of elec-
ance by conduction and coupling - Part 7: Passenger
tronic components of passenger cars and commercial
cars and light commercial vehicles with nominal 12 V
vehicles, regardless of the propulsion system (e.g.
supply voltage - Electrical transient conduction along
spark-ignition engine, diesel engine, electric motor).
supply lines only.
The electromagnetic disturbance considered in this
IS0 7637-2:1990, Road vehicles - Electrical disturb-
part of IS0 11452 is limited to continuous narrowband
ance by conduction and coupling - Part 2: Commer-
electromagnetic fields.
cial vehicles with nominal 24 V supply voltage -
Immunity measurements of complete vehicles are
Electrical transient conduction along supply lines
generally only possible by the vehicle manufacturer,
only.
because, for example, of the high costs of an
absorber-lined chamber, preserving the secrecy of IS0 11452-l :I 995, Road vehicles - Electrical dis-
prototypes or the large number of different vehicle
turbances by narrowband radiated electromagnetic
models. Therefore, for research, development and
energy - Component test methods - Part 1: Gen-
quality control, a laboratory measuring method is used eral and definitions.
by the manufacturer.
IS0 11452-1 specifies general test methods, defi-
3 Test conditions
nitions, practical use and basic principles of the test
procedure.
3.1 Test temperature and supply voltage
2 Normative references
The ambient temperature during the test shall be
(23 + 5) “C.
The following standards contain provisions which,
through reference in this text, constitute provisions
The supply voltage during the test shall be
of this part of IS0 11452. At the time of publication,
(13,5 + 0,5) V for 12 V electrical systems and
the editions indicated were valid. All standards are
(27 +?) V for 24 V electrical systems.
-
subject to revision, and parties to agreements based
If other values are agreed by the users of this part of
on this part of IS0 11452 are encouraged to investi-
gate the possibility of applying the most recent edi- IS0 11452, the values shall be documented in the
test report.
tions of the standards indicated below. Members of
1
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0 IS0
IS0 11452=4:1995(E)
these frequency step sizes should be reduced in the
3.2 Frequency range
frequency range concerned to find the minimum sus-
ceptibility thresholds.
To test automotive electronic systems, the applicable
frequency range of the BCI test method is 1 MHz to
400 MHz.
3.6 Test severity levels
The frequency range of the BCI test method is a di-
The user should specify the test severity level(s) over
rect function of the current probe characteristic. More
the frequency range. Suggested severity levels are
than one type of current probe may be required.
included in annex C.
These test severity levels are expressed in terms of
3.3 Modulation
the equivalent root-mean-square value of the un-
The test determines the type and frequency of modulated wave.
modulation. If no values are agreed between the us-
be
ers of this part of IS0 11452, the following shal
used:
4 Test instrument description and
- no modulation (CW)
specification
(AM) of
- 1 kHz sine-wave amplitude modulation
4.1 BCI system
80 %
Bulk current injection is a method of carrying out im-
3.4 Dwell time
munity tests by inducing disturbance signals directly
into the wiring harness by means of a current injection
At each frequency, the device under test shall be ex-
probe. The injection probe is a current transformer
posed to the test level for the minimum response
through which the wires of the device under test are
time needed to control it. In all cases, this minimum
passed. Immunity tests are carried out by varying the
time of exposure shall not be less than 2 s.
test severity level and frequency of the induced dis-
turbance.
3.5 Frequency step sizes
4.2 Instrumentation
All tests in this part of IS0 11452 shall be conducted
with frequency step sizes not greater than those
Figure 1 shows an example of a set-up of the BCI
specified in table 1.
measurement system.
If a regulated power supply is used, then an artificial
Table 1 - Frequency step sizes
I I
network (AN) should be used in the supply lines to the
Maximum
device under test to define the RF impedance. This
Frequency band
frequency step size
network is specified in IS0 7637-l and IS0 7637-2.
MHz MHz
When a battery is used, a charging source is required
1
>l to
to achieve the specified test voltage.
2
>I0 to 6200
An injection probe or set of probes capable of oper-
>200 to <400 20
ating over the test frequency range is required to
interface the test equipment to the device under test.
The probe shall be capable of withstanding a contin-
Alternatively, logarithmic frequency steps, with the
uous input power over the test frequency range re-
same minimum number of frequency steps in each
gardless of the system loading.
frequency band, may be used. The values, as agreed
by the users of this part of IS0 11452, shall be docu-
The monitoring probe or set of probes shall be capa-
mented in the test report.
ble of operating over the test frequency range. The
If it appears that the thresholds of the monitoring probe(s) shall terminate in the load im-
susceptibility
pedance at which it was calibrated.
device under test are very near the chosen test level,
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IS0 11452-4:1995(E)
Dimensions in millimetres
100 min.
500 min.
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