1、Small craft - Electrical devices - Protection against ignition of surrounding flammable gases (ISO 8846:1990)BS EN ISO 8846:2017BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06National forewordThis British Standard is the UK implementation of EN ISO 8846:2017. It is
2、identical to ISO 8846:1990 . It supersedes BS EN 28846:1993, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee GME/33, Small craft.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not
3、 purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2017 Published by BSI Standards Limited 2017ISBN 978 0 580 96508 1ICS 47.080Compliance with a British Standard cannot confer immunity from legal obliga
4、tions. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 November 2017.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN ISO 8846:2017EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 8846August 2017IC
5、S 47.080 Supersedes EN 28846:1993, EN 28846:1993/EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CEN Ref. No. EN ISO 8846:2017: EAll rights of exploitation in any form and by any m
6、eans reserved worldwide for CEN national MembersSmall craft - Electrical devices - Protection against ignition of surrounding flammable gases (ISO 8846:1990)Navires de plaisance - quipements lectriques - Protection contre linflammation des gaz inflammables environnants (ISO 8846:1990)Kleine Wasserfa
7、hrzeuge - Elektrische Gerte - Zndschutz gegenber entflammbaren Gasen (ISO 8846:1990)This European Standard was approved by CEN on 23 July 2017.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a na
8、tional standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A ve
9、rsion in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus,
10、Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United
11、 Kingdom.English VersionEN ISO 8846:2017 (E)European forewordThe text of ISO 8846:1990 has been prepared by Technical Committee ISO/TC 188 “Small craft” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 8846:2017.This European Standard shall be given the s
12、tatus of a national standard, either by publication of an identical text or by endorsement, at the latest by February 2018, and conflicting national standards shall be withdrawn at the latest by February 2018.Attention is drawn to the possibility that some of the elements of this document may be the
13、 subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights.This document supersedes EN 28846:1993.This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential re
14、quirements of EU Directive(s).For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document.According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard:
15、Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia,
16、Spain, Sweden, Switzerland, Turkey and the United Kingdom.Endorsement noticeThe text of ISO 8846:1990 has been approved by CEN as EN ISO 8846:2017 without any modification.2BS EN ISO 8846:2017EN ISO 8846:2017 (E)Annex ZA (informative) Annex ZA Relationship between this European Standard and the Esse
17、ntial Requirements of EU Directive 2013/53/EUThis European standard has been prepared under a mandate given to CEN by the European Commission to provide one means of conforming to Essential Requirements of the New Approach Directive 2013/53/EU.Once this standard is cited in the Official Journal of t
18、he European Union under that Directive and has been implemented as a national standard in at least one member state, compliance with the normative clauses of this standard given in Table ZA.1 confers, within the limits of the scope of this standard, a presumption of conformity with the relevant Esse
19、ntial Requirements of that Directive and associated EFTA regulations.Table ZA.1 Correspondence between this European Standard and Directive 2013/53/EUClauses/subclauses of this European Standard Essential requirements (ERs) of EU Directive 2013/53/EUQualifying remarks/NotesAll clauses I.A.5.1.1 Inbo
20、ard engine In respect of electrical devic-es that may be mounted on an inboard engine or in an engine enclosure in order to minimise the risk of fire.This Standard does not deal with accessibility of these devices in order to enable frequent inspec-tion and/or servicing.This Standard does not deal w
21、ith insulating materials inside the engine compartment.All Clauses I.A.5.2.2(a) - Fuel tanks In respect of protection from electrical devices as sources of ignition which are located in fuel tank compartments.All Clauses 1.A.5.3 Electrical system This Standard does not cover ignition protection for
22、electri-cal devices that may operate in hydrogen and oxygen mixtures produced by vented batteries gases escaping into the surround-ing atmosphere.All Clauses Annex II, Components of watercraft(1) Ignition protected equipment for inboard and stern drive petrol engines and petrol tank spacesWARNING Ot
23、her requirements and other EU Directives may be applicable to the product(s) falling within the scope of this standard3BS EN ISO 8846:2017ISO 8846:1990(E)Foreword v1 Scope .12 Definitions .13 Test programme 14 External surface temperature test .25 Test method Sealed devices .25.1 Equipment . 25.2 Te
24、st procedure . 36 Test method Non-sealed devices 36.1 Equipment . 46.2 Electrical device preparation 46.3 Test procedure . 76.4 Special notes for non-sealed electrical devices . 86.4.1 Cranking motors . 86.4.2 Distributors 86.4.3 Intrinsically safe devices . 87 Marking 8Annex A (informative) Bibliog
25、raphy .9iv ISO 1990 All rights reservedContents PageBS EN ISO 8846:2017ISO 8846:1990(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 carried out th
26、rough 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 collab
27、orates 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 a
28、t least 75 % of the member bodies casting a vote.International Standard ISO 8846 was prepared by Technical Committee ISO/TC 188, Small craft. Annex A of this International Standard is for information only. ISO 1990 All rights reserved vBS EN ISO 8846:2017This page deliberately left blankSmall craft
29、- Electrical devices - Protection against ignition of surrounding flammable gases (ISO 8846:1990)1 ScopeThis International Standard describes test methods and requirements for the design of electrical devices to be used on small craft so that they may be operated in an explosive atmosphere without i
30、gniting surrounding flammable gases. It does not require explosion-proof or explosion-protected electrical apparatus as defined in IEC 79-0. 1This International Standard does not cover ignition protection procedures for products or components that may operate in hydrogen and air mixtures. Nor does i
31、t cover mechanisms of ignition from external sources, such as static electricity, lightning or other factors not related to the apparatus under test.2 DefinitionsFor the purposes of this International Standard, the following definitions apply.2.1flammable hydrocarbon mixtureMixture of propane and ai
32、r (per cent by volume) between the Lower Explosive Limit (LEL) and Upper Explosive Limit (UEL) that will explode if ignited by any means. Tests using propane and air are considered to cover marine fuel and air mixtures between the LEL and UEL.2.2ignition-protected deviceDevice that complies with the
33、 requirements of one of the test programmes given in clause 3.2.3ignition source(1) Any electrical contacts, commutator or brush assembly, or collector ring and brushes that may produce electrical arcs of ignition-capable energy.(2) Resistor or other component or surface that may operate at a temper
34、ature sufficient to ignite a flammable mixture.2.4normal operating conditionsAny operating conditions of the device, including the maximum achievable overload up to 400 % of the rated current (circuit breakers, switches and the like) and a stalled rotor condition for any motor with the circuit prote
35、cted by an overcurrent protective device specified by the product manufacturer.3 Test programme3.1 The external surface temperature test shall be carried out according to clause 4.3.2 Electrical devices which can generate sparks or arcs under operation (switches, relays, generators, fuses, distribut
36、ors, cranking motors, etc.) shall be tested according to clause 5 if they can be considered sealed and according to clause 6 if they are non-sealed.3.3 Electrical devices showing an increase of the external surface temperature of more than 100 C above ambient under operation shall be tested accordin
37、g to clause 4. Electrical devices not rated for INTERNATIONAL STANDARD ISO 8846:1990(E) ISO 1990 All rights reserved 1BS EN ISO 8846:2017ISO 8846:1990(E)continuous operation and wired with momentarily operated switches, such as engine-cranking motors, propulsion unit trim motors and other intermitte
38、ntly operated devices, are exempt from this test.4 External surface temperature test4.1 The electrical device shall be placed in a closed, thermally insulated air-circulating oven having an initial temperature of 60 C 2 C. Suitable heating shall be provided in addition to that generated by the compo
39、nent in order to keep the temperature in the oven constant at 60 C 2 C.4.2 The test voltage supply shall be adjusted within the range of 80 % to 120 % of the nominal system voltage giving the greatest temperature increase.4.3 The electrical device shall be operated continuously for a minimum of 7 h
40、in the mode in which it draws its maximum current.4.4 The maximum allowable surface temperature is 200 C, measured at any point on the electrical device exterior.5 Test method Sealed devicesElectrical devices which under operation can produce sparks or arcs shall be tested according to 5.1 and 5.2 i
41、f they are considered so tight that no surrounding gases can penetrate into them.5.1 EquipmentA water chamber, as shown in figure 1, is needed.2 ISO 1990 All rights reservedBS EN ISO 8846:2017ISO 8846:1990(E)5.2 Test procedure5.2.1 Submerge the electrical device to be tested in a water chamber at am
42、bient temperature, changing its attitude if necessary so that all possible sources of leaks are at the top and are 340 mm to 370 mm below the water surface. Submerged time is 15 min for each attitude change.Figure 1 Water chamber for sealed devices5.2.2 Observe the electrical device under test caref
43、ully throughout the test duration for a leak as evidenced by the generation of a bubble or stream of bubbles.5.2.3 If bubbles are observed coming out of the electrical portion of the device, the electrical device shall not be considered sealed and shall be tested under clause 6.5.2.4 If no bubbles a
44、re observed, remove the electrical device from the water chamber and dry its exterior.5.2.5 Dismantle the electrical device for internal inspection.5.2.6 If no water is found inside the electrical device, it shall be accepted as a sealed ignitionprotected device. If water is found, it shall be teste
45、d according to clause 6.6 Test method Non-sealed devicesTesting according to 6.1 to 6.4 shall be carried out on electrical devices which under operation can produce sparks or arcs and are considered to be open so that surrounding gases can penetrate into them. Electrical devices which after testing
46、according to clause 5 have been found to be non-sealed shall also be tested as in 6.1 to 6.4. ISO 1990 All rights reserved 3BS EN ISO 8846:2017ISO 8846:1990(E)6.1 EquipmentA test assembly as shown in figure 2 for large non-sealed electrical devices or figure 3 for small non-sealed electrical devices
47、 is needed. The test chamber shall be equipped with a pressure-relief lid.6.2 Electrical device preparation6.2.1 Provide means of allowing a combustible mixture of propane and air into the electrical device via a 150 mm minimum length of rigid or flexible tubing having an inside diameter of 1,5 mm t
48、o 6,5 mm, the selection to be based on the minimum inside diameter that can maintain a test rate which allows a minimum of two electrical device ignitions per minute. The tubing supplying the mixture sample 4 ISO 1990 All rights reservedBS EN ISO 8846:2017ISO 8846:1990(E)from the device to the analy
49、ser (see figure 2) shall have a 1,5 mm inside diameter, and a minimum length of 150 mm.Multiple or single-shot spark option.Figure 2 Test assembly for large non-sealed electrical devices ISO 1990 All rights reserved 5BS EN ISO 8846:2017ISO 8846:1990(E)Multiple or single-shot spark option.Use pressure transducer if space is available.Figure 3 Test assembly for small non-sealed electrical devices6 ISO 1990 All rights reservedBS EN ISO 8846:2017ISO 8846:1990(E)6.2.2 Electrical devices that do not contain openings large
