1、BS ISO 7637-3:2016Road vehicles Electricaldisturbances from conductionand couplingPart 3: Electrical transient transmission bycapacitive and inductive coupling via linesother than supply linesBSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS ISO 7637-3:2016 BRITISH
2、STANDARDNational forewordThis British Standard is the UK implementation of ISO 7637-3:2016.It supersedes BS ISO 7637-3:2007 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee AUE/16, Data Communication (Road Vehicles).A list of organizations represented on
3、 this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 78592 4ICS
4、 43.040.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 July 2016.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS ISO 7637-3:2016
5、 ISO 2016Road vehicles Electrical disturbances from conduction and coupling Part 3: Electrical transient transmission by capacitive and inductive coupling via lines other than supply linesVhicules routiers Perturbations lectriques par conduction et par couplage Partie 3: Transmission des perturbatio
6、ns lectriques par couplage capacitif ou inductif le long des lignes autres que les lignes dalimentationINTERNATIONAL STANDARDISO7637-3Third edition2016-07-01Reference numberISO 7637-3:2016(E)BS ISO 7637-3:2016ISO 7637-3:2016(E)ii ISO 2016 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2016, Pub
7、lished in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permis
8、sion can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 7637-3:2016ISO 7637-3:2016(E)For
9、eword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Test methods . 24.1 General . 24.2 Standard test conditions . 34.3 Ground plane 34.4 General test setup conditions . 34.5 CCC method 34.5.1 General 34.5.2 Generator verification . 34.5.3 Transient pulses level adju
10、stment 44.5.4 DUT test . 44.6 DCC method . 54.6.1 General 54.6.2 Generator verification . 64.6.3 Transient pulses level adjustment 64.6.4 DUT test . 74.7 ICC method 114.7.1 General. 114.7.2 Generator verification 114.7.3 Transient pulses level adjustment .114.7.4 DUT test 125 Test instrument descrip
11、tion and specification 145.1 Power supply . 145.2 Oscilloscope 155.3 Transient pulses generator . 155.3.1 General. 155.3.2 Slow transient pulses test 2a 155.3.3 Fast transient pulses 3a and 3b test .165.4 CCC fixture . 185.5 DCC fixture . 205.6 ICC fixture . 20Annex A (normative) Calibration fixture
12、 used for the ICC test method 21Annex B (informative) Example of test severity levels associated with functional performance status classification .22Annex C (informative) Estimation of the inductive coupling factor 24 ISO 2016 All rights reserved iiiContents PageBS ISO 7637-3:2016ISO 7637-3:2016(E)
13、ForewordISO (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 te
14、chnical 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
15、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 documen
16、t 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
17、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 n
18、ot constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informatio
19、n.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 76373:2007), which has been technically revised.ISO 7637 consists of the foll
20、owing 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 l
21、ines other than supply linesThe 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 76372 Technical ReportAnnex A form
22、s an integral part of this part of ISO 7637.Annex B and Annex C are informative.iv ISO 2016 All rights reservedBS ISO 7637-3:2016ISO 7637-3:2016(E)IntroductionThe fast transient pulse test uses bursts composed of a number of fast transient pulses, which are coupled into lines (I/O lines in particula
23、r) of electronic equipment. The fast rise time, the repetition rate and the low energy of the fast transient bursts are significant to the test.The slow transient pulse test applies a number of single pulses, as used for conducted transient pulse test, to the DUT. ISO 2016 All rights reserved vBS IS
24、O 7637-3:2016BS ISO 7637-3:2016Road vehicles Electrical disturbances from conduction and coupling Part 3: Electrical transient transmission by capacitive and inductive coupling via lines other than supply lines1 ScopeThis part of ISO 7637 defines bench test methods to evaluate the immunity of device
25、s under test (DUTs) to transient pulses coupled to lines other than supply lines. The test pulses simulate both fast and slow transient disturbances caused by the switching of inductive loads and relay contact bounce.The following three test methods are described in this part of ISO 7637: capacitive
26、 coupling clamp (CCC) method; direct capacitive coupling (DCC) method; inductive coupling clamp (ICC) method.This part of ISO 7637 applies to road vehicles fitted with nominal 12 V or 24 V electrical systems.For transient pulses immunity, Annex B provides recommended test severity levels in line wit
27、h the functional performance status classification (FPSC) principle described in ISO 7637-1.2 Normative referencesThe 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.
28、 For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 7637-1, Road vehicles Electrical disturbances from conduction and coupling Part 1: Definitions and general considerationsISO 7637-2, Road vehicles Electrical disturbances from conduction and
29、 coupling Part 2: Electrical transient conduction along supply lines onlyISO 11452-4, Road vehicles Component test methods for electrical disturbances from narrowband radiated electromagnetic energy Part 4: Harness excitation methods3 Terms and definitionsFor the purposes of this document, the terms
30、 and definitions given in ISO 7637-1 apply.INTERNATIONAL STANDARD ISO 7637-3:2016(E) ISO 2016 All rights reserved 1BS ISO 7637-3:2016ISO 7637-3:2016(E)4 Test methods4.1 GeneralThis Clause describes bench test methods for testing the immunity of electrical system components or devices under test (DUT
31、s) against coupled transient pulses. These tests shall be performed in the laboratory.The defined transient pulses represent the characteristics of most of the known transient pulses which may occur in the vehicle.Some transient pulse tests may be omitted if a device, depending on its function or it
32、s configuration, is not subjected to comparable transient pulses in the vehicle. It is part of the vehicle manufacturers responsibility to define the transient pulse tests needed for specific components.A test plan shall be written to define the following: the test methods to be used; the transient
33、pulses tests to be applied; the transient pulses levels; the number of transient pulses to be applied; the DUT operating modes; the wiring harness (test versus production); the leads to be included in the capacitive coupling clamp, if used; the leads to be tested using the direct coupling capacitor
34、method, if used; the capacitance values to be used, if the direct coupling capacitor method is used for specific communication lines; the leads to be included in the inductive coupling clamp, if used; and the type of inductive coupling clamp, if the inductive coupling method is used.Suggested transi
35、ent pulse test severity levels for the evaluation of immunity of DUTs can be chosen from Table B.1 and Table B.2.The transient pulse test severity levels should be mutually agreed upon between the vehicle manufacturer and the supplier prior to the test.The applicability of the three different test m
36、ethods is indicated in Table 1.It is sufficient to select one test method for slow transient pulses and one test method for fast transient pulses.Table 1 Test method applicabilityTransient pulses type CCC method DCC method ICC methodSlow transient pulses 2a (5.3.2)Not applicable Applicable Applicabl
37、eFast transient pulses 3a and 3b (5.3.3)Applicable Applicable Not applicable2 ISO 2016 All rights reservedBS ISO 7637-3:2016ISO 7637-3:2016(E)4.2 Standard test conditionsStandard test conditions shall be according to ISO 7637-1 for the following: test temperature; supply voltage.Unless otherwise def
38、ined in this part of ISO 7637, the tolerance on test severity levels is +100%.4.3 Ground planeThe ground plane shall be made of 0,5 mm thick (minimum) copper, brass or galvanized steel.Unless otherwise specified in the test plan, the minimum width of the ground plane shall be 1 000 mm, or underneath
39、 the entire setup width (excluding power supply and transient pulse generator) plus 200 mm, whichever is larger.Unless otherwise specified in the test plan, the minimum length of the ground plane shall be 2 000 mm, or underneath the entire setup length (excluding power supply and transient pulse gen
40、erator) plus 200 mm, whichever is larger.4.4 General test setup conditionsThe DUT is arranged and connected according to its requirements. The DUT should be connected to the original operating devices (loads, sensors, etc.) using the test setup described in 4.5.4, 4.6.4 and 4.7.4, unless otherwise a
41、greed between the vehicle manufacturer and the supplier.If the actual DUT operating signal sources are not available, they may be simulated.The DUT shall be placed on a non-conductive, low relative permittivity material (r 1,4), at (50 5) mm above the ground plane. If the DUT is locally grounded (ma
42、ximum length of 200 mm), then the DUTs ground supply line shall be connected to the ground plane as defined in the test plan.Grounding of the DUT case to the ground plane shall reflect the vehicle installation and shall be defined in the test plan.All harnesses shall be placed on a non-conductive, l
43、ow relative permittivity (dielectric-constant) material (r 1,4), at (50 5) mm above the ground plane.Unless otherwise specified in the test plan, all loads, sensors, etc. grounds (lines, metallic cases) are connected to the ground plane using the shortest possible length.To minimize extraneous capac
44、itive coupling to the DUT, it is advisable that the minimum distance between the DUT and all other conductive structures, such as walls of a shielded enclosure (with the exception of the ground plane underneath the test setup), should be more than 0,5 m.4.5 CCC method4.5.1 GeneralThe CCC method is s
45、uitable for coupling the fast transient pulses, particularly for DUTs with a moderate or large number of leads to be tested. It will not couple the slow transient pulses.4.5.2 Generator verificationThe transient pulse parameters (see Figure 10 and Figure 11) shall be verified prior to the test accor
46、ding to ISO 7637-2. Verification shall be performed with the 50 load condition only. ISO 2016 All rights reserved 3BS ISO 7637-3:2016ISO 7637-3:2016(E)4.5.3 Transient pulses level adjustmentThe transient pulse generator shall be connected as shown in Figure 1.The transient pulse level is adjusted wi
47、th a 50 input oscilloscope connected through a 50 coaxial cable to a 50 attenuator which is directly connected to the output of the CCC (no intermediate cable connections) as shown in Figure 1. There shall be no lines routed through the coupling clamp during adjustment. Examples of test severity lev
48、els are listed in Annex B.NOTE The open circuit voltage of the transient pulses generator is approximately twice the value of the specific test voltage, due to 50 loading of the attenuator and the oscilloscope.Key1 transient pulses generator2 50 coaxial cable (1 m)3 CCC4 50 attenuator5 oscilloscope
49、(50 input)Figure 1 Setup for transient pulses level adjustment CCC method4.5.4 DUT testEnsure that the general test setup conditions defined in 4.4 are applied.The test setup using the CCC is shown in Figure 2. The coupling circuit consists of a CCC through which lines of the DUT are installed as agreed between the vehicle manufacturer and the supplier and documented in the test plan. The coupling length is 1 m.The DUT 12/24 V supply lines (ground and supply) should no
