1、BSI Standards PublicationBS ISO 10924-1:2016Road vehicles CircuitbreakersPart 1: Definitions and general testrequirementsBS ISO 10924-1:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 10924-1:2016.It supersedes BS ISO 10924-1:2009 which is withdrawn.The UK
2、 participation in its preparation was entrusted to TechnicalCommittee AUE/32, Electrical and electronic components andgeneral system aspects (Road vehicles).A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include a
3、ll the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2016. Published by BSI StandardsLimited 2016ISBN 978 0 580 84681 6ICS 43.040.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British St
4、andard was published under the authority of theStandards Policy and Strategy Committee on 30 April 2016.Amendments issued since publicationDate Text affectedBS ISO 10924-1:2016 ISO 2016Road vehicles Circuit breakers Part 1: Definitions and general test requirementsVhicules routiers Coupe-circuits Pa
5、rtie 1: Dfinitions et exigences dessais gnralesINTERNATIONAL STANDARDISO10924-1Second edition2016-04-01Reference numberISO 10924-1:2016(E)BS ISO 10924-1:2016ISO 10924-1:2016(E)ii ISO 2016 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2016, Published in SwitzerlandAll rights reserved. Unless ot
6、herwise 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. Permission can be requested from either ISO at the addres
7、s 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 10924-1:2016ISO 10924-1:2016(E)Foreword v1 Scope . 12 Normative references 13 Terms
8、 and definitions . 14 Marking, labelling and colour coding . 55 Tests and requirements 55.1 General . 55.1.1 General test conditions . 55.1.2 General performance requirements 65.2 Voltage drop 65.2.1 Purpose 65.2.2 Test . 65.2.3 Requirement 65.3 Maximum housing temperature 65.3.1 Purpose 65.3.2 Test
9、 . 65.3.3 Requirement 65.4 Environmental conditions . 75.4.1 Purpose 75.4.2 Mechanical loads 75.4.3 Climatic loads 75.4.4 Chemical loads . 75.5 Operating time rating 75.5.1 Purpose 75.5.2 Test . 85.5.3 Requirement 85.6 Current steps 85.6.1 Purpose 85.6.2 Test . 85.6.3 Requirement 85.7 No current tri
10、p and reset temperature 85.7.1 Purpose 85.7.2 Test . 85.7.3 Requirement 95.8 Absolute breaking capacity 95.8.1 Purpose 95.8.2 Test . 95.8.3 Requirement 95.9 Breaking capacity . 95.9.1 Purpose 95.9.2 Test 105.9.3 Requirement .105.10 Strength of terminals 105.10.1 Purpose . 105.10.2 Test 115.10.3 Requ
11、irement .115.11 Endurance 115.11.1 Purpose . 115.11.2 Test 115.11.3 Requirement .115.12 Dielectric strength. 125.12.1 Purpose . 125.12.2 Test 12 ISO 2016 All rights reserved iiiContents PageBS ISO 10924-1:2016ISO 10924-1:2016(E)5.12.3 Requirement .12Annex A (informative) Cycling profiles .13Annex B
12、(informative) Test circuit .15iv ISO 2016 All rights reservedBS ISO 10924-1:2016ISO 10924-1:2016(E)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 ca
13、rried 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
14、. 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 differ
15、ent 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
16、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
17、).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 ISOs adherence to the WTO principles
18、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 second edition cancels and replaces t
19、he first edition (ISO 10924-1:2009), which has been technically revised.ISO 10924 consists of the following parts, under the general title Road vehicles Circuit breakers: Part 1: Definitions and general test requirements Part 2: Users guide Part 3: Miniature circuit breakers with tabs (Blade type),
20、Form CB11 Part 4: Medium circuit breakers with tabs (Blade type), Form CB15 Part 5: Circuit breakers with bolt with rated voltage of 450 V ISO 2016 All rights reserved vBS ISO 10924-1:2016BS ISO 10924-1:2016Road vehicles Circuit breakers Part 1: Definitions and general test requirements1 ScopeThis p
21、art of ISO 10924 defines terms and specifies general test requirements for circuit breakers for use in road vehicles with a nominal voltage of 12 V d.c., 24 V d.c, 48 V d.c. and 450 V d.c.This part of ISO 10924 is intended to be used in conjunction with other parts of ISO 10924. The numbering of its
22、 clauses corresponds to that of this part of ISO 10924 whose requirements are applicable, except where modified by requirements particular to this part of ISO 10924.This part of ISO 10924 is not applicable to circuit breaker holders (electrical centres or fuse-holders) used in vehicles.2 Normative r
23、eferencesThe 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
24、.ISO 67221, Road vehicles 60 V and 600 V single-core cables Part 1: Dimensions, test methods and requirements for copper conductor cablesISO 88201, Road vehicles Fuse-links Part 1: Definitions and general test requirementsISO 88203, Road vehicles Fuse-links Part 3: Fuse-links with tabs (blade type)
25、Type C (medium), Type E (high current) and Type F (miniature)ISO 167501, Road vehicles Environmental conditions and testing for electrical and electronic equipment Part 1: GeneralISO 167503, Road vehicles Environmental conditions and testing for electrical and electronic equipment Part 3: Mechanical
26、 loadsISO 167504, Road vehicles Environmental conditions and testing for electrical and electronic equipment Part 4: Climatic loadsISO 167505, Road vehicles Environmental conditions and testing for electrical and electronic equipment Part 5: Chemical loadsIEC 60068270, Environmental testing Part 2:
27、Tests Test Xb: Abrasion of markings and letterings caused by rubbing of fingers and hands3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 16750-1, ISO 8820-1 and the following apply.INTERNATIONAL STANDARD ISO 10924-1:2016(E) ISO 2016 All rights reserve
28、d 1BS ISO 10924-1:2016ISO 10924-1:2016(E)3.1absolute breaking capacityvalue of prospective breaking current that a circuit breaker is capable of breaking at least once at USmaxunder prescribed conditions of use and behaviour3.2breaking capacityIBvalue of prospective breaking current a circuit breake
29、r is capable of breaking several times at USmaxunder prescribed conditions of use and behaviour3.3circuit breakerovercurrent protection device that mechanically interrupts the circuit reversibly, responsive to electric currentNote 1 to entry: The test fixture for the circuit breaker may be identical
30、 to the test fixture as described in the appropriate part of ISO 8820; however, some circuit breaker designs do not require a separate test fixture as the cables are directly connected to the circuit breaker terminals.3.4 Circuit breaker components3.4.1housingelectrically non-conductive mechanical s
31、upport for conductive and non-conductive parts of the circuit breaker (3.3)3.4.2terminalpart of the circuit breaker (3.3) which makes the electrical connection in the electrical circuit3.4.3time delayed elementactive part that acts depending on the current and causes the reversible interruption of t
32、he circuit in the case of an overcurrent3.5 Circuit breaker features3.5.1reset mechanismprovides a user interface in a manual reset circuit breaker (3.3) for resetting the device after an overcurrent condition3.5.2snap-action mechanismensures that the contact closing speed by mechanical reset is ind
33、ependent of the speed of operation of the reset mechanism (3.5.1)3.5.3switching mechanismprovides the ability to switch off the circuit breaker (3.3) by mechanical means3.5.4trip mechanismcomprises a time delayed actuator and mechanical components3.5.4.1cycling trip freecircuit breaker mechanism tha
34、t cycles to open and close the contact(s) repeatedly if the actuator is maintained in the “ON” position in case of overcurrent2 ISO 2016 All rights reservedBS ISO 10924-1:2016ISO 10924-1:2016(E)3.5.4.2fully trip freecircuit breaker mechanism that will cause the moving contact(s) to open and remain o
35、pen, even if the actuator is maintained in the “ON” position in case of overcurrent3.5.5trip free mechanismprevents the switching mechanism (3.5.3) from being defeated by forcibly holding the actuator “ON” position, i.e. cannot be held closed against an overload3.6 Circuit breaker types3.6.1type I a
36、utomatic resetprovides the reversal of an overcurrent condition after a cool-down period without any manual activity required by a user3.6.2type II electrically resethas a secondary heating circuit which, after an overcurrent condition occurs, creates heat internally upon the time delayed element (3
37、.4.3) of the circuit breaker (3.3) to keep it from reversing as long as electrical system voltage and a small current flow (1,0 A) is available, reset function is accomplished by removing all electrical power supplied to the circuit breaker until the internal thermal element cools down and returns t
38、o its conductive position3.6.3type III manual resetcontains a reset mechanism (3.5.1) that the user is required to operate manually for reversal of a circuit interruption3.6.4type IV switchablemechanism like type III additionally capable of being switched off manually for user testing or maintenance
39、3.7dielectric strengthstrength measured between specified measuring points, as shown in the appropriate parts of ISO 10924, at a specified voltage without flash-over3.8nominal voltageUNvoltage value used to describe the electrical system of a vehicleSOURCE: ISO 16750-1:2006, 3.13.9operating timetime
40、 between the application of an overcurrent and the moment when the current drops below a value as specified in the appropriate part of ISO 8820SOURCE: ISO 8820-1:2014, 3.73.10operating time rating operating time (3.9), as a function of the current under defined test conditionsSOURCE: ISO 8820-1:2014
41、, 3.8 ISO 2016 All rights reserved 3BS ISO 10924-1:2016ISO 10924-1:2016(E)3.11prospective currentIPcurrent, which would flow in a circuit, if the circuit breaker (3.3) would be replaced by a conductor with negligible impedanceNote 1 to entry: See Figure B.1.3.12rated currentIRcurrent used for identi
42、fying the circuit breaker (3.3), according to specified testsNote 1 to entry: The continuous current can be lower than the rated current.3.13rated voltageURmaximum supply voltage for which the circuit breaker is designedSOURCE: ISO 8820-1:2014, 3.103.14rerating factorcorrection factor of rated curre
43、nt (3.14) that consider fluctuations in ambient temperature3.15resetting timetime elapsed between a circuit breaker (3.3) tripping due to an overcurrent and subsequently reaching the ability of the circuit breaker to be reset3.16selectivityprimary interruption of the circuit breaker (3.3) placed clo
44、sest to faulty section3.17supply voltage maximumUSmaxhighest supply voltage in the specified supply voltage range of the DUT performing class ASOURCE: ISO 16750-1:2006, 3.43.18time constanttime required for a physical quantity to rise from 0 to 1 1/e (that id 63,2 %) of its final steady value when i
45、t varies with time, t, as 1 1-ktNote 1 to entry: The continuous current is lower than the rated current (3.14).SOURCE: ISO 8820-1:2014, 3.133.19test voltagevoltage(s) applied to the DUT during a testSOURCE: ISO 16750-1:2006, 3.74 ISO 2016 All rights reservedBS ISO 10924-1:2016ISO 10924-1:2016(E)3.20
46、voltage dropUDvoltage measured between specified measuring points at a specified currentSOURCE: ISO 8820-1:2014, 3.144 Marking, labelling and colour codingThe circuit breakers shall be permanently marked with the following to be externally visible: rated current (IR) in Ampere (A), the value of the
47、rated current (IR) without unit is accepted; supply voltage maximum (USmax) in (V); colour coding; manufacturers name, trademark and/or symbol; part no. or identification.5 Tests and requirements5.1 General5.1.1 General test conditionsIf not otherwise specified, all tests shall be performed at room
48、temperature (RT) (23 5) C at a relative humidity (RH) of 45 % to 75 % (standard condition).At the beginning of the electrical tests, a direct current shall be fixed at the rated value. This current shall be measured with an appropriate method. If not otherwise specified, no further adjustments durin
49、g the tests are allowed.All electrical measurement equipment shall have a tolerance of less than 2 %.Mount the circuit breaker in a test fixture (holder) as specified in the applicable part of ISO 10924.For appropriate cable sizes, see the applicable part of ISO 10924.Temperature measurements shall be performed at no forced air flow.Connections shall be made to the circuit breaker with copper cables according to ISO 6722-1. The cable length between the
