1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationMeasurement of the dimensions of a cylindrical component with axial terminationsBS EN 60294:2012National forewordThis British Standard is the UK implementation of EN 60294:2012.
2、It is identi-cal to IEC 60294:2012. It supersedes BS 5692:1979 which is withdrawn.The UK participation in its preparation was entrusted to Technical CommitteeEPL/40X, Capacitors and resistors for electronic equipment.A list of organizations represented on this committee can be obtained onrequest to
3、its secretary.This publication does not purport to include all the necessary provisions of acontract. Users are responsible for its correct application. The British Standards Institution 2012Published by BSI Standards Limited 2012ISBN 978 0 580 73103 7ICS 31.020Compliance with a British Standard can
4、not confer immunity fromlegal obligations.This British Standard was published under the authority of the StandardsPolicy and Strategy Committee on 31 October 2012.Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 60294:2012EUROPEAN STANDARD EN 60294 NORME EUROPENNE
5、EUROPISCHE NORM October 2012 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Management Centre: Avenue Marnix 17, B - 1000 Brussels 2012 CENELEC - All rights of exploitation in any form a
6、nd by any means reserved worldwide for CENELEC members. Ref. No. EN 60294:2012 E ICS 31.020 English version Measurement of the dimensions of a cylindrical component with axial terminations (IEC 60294:2012) Mesure des dimensions dun composant cylindrique sorties axiales (CEI 60294:2012) Bestimmung de
7、r Mae eines zylindrischen Bauelementes mit axialen Anschlssen (IEC 60294:2012) This European Standard was approved by CENELEC on 2012-08-17. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a
8、national 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 CENELEC member. This European Standard exists in three official versions (English, French, German
9、). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium,
10、Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Swi
11、tzerland, Turkey and the United Kingdom. BS EN 60294:2012EN 60294:2012 - 2 - Foreword The text of document 40/2154/FDIS, future edition 2 of IEC 60294, prepared by IEC/TC 40 “Capacitors and resistors for electronic equipment“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
12、EN 60294:2012. The following dates are fixed: latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2013-05-17 latest date by which the national standards conflicting with the document have to be withdrawn (
13、dow) 2015-08-17 Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC 60294:20
14、12 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indicated: IEC 60717 NOTE Harmonised as EN 60717. IEC 61192-3 NOTE Harmonised as EN 61192-3. BS EN 60294:2012- 3 - EN 60294:20
15、12 Annex ZA (normative) Normative references to international publications with their corresponding European publications 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
16、applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. Publication Year Title EN/HD Year IEC 60301 - Preferred
17、 diameters of wire terminations of capacitors and resistors EN 60301 - BS EN 60294:2012 2 60294 IEC:2012 CONTENTS 1 Scope . 5 2 Normative references . 5 3 Body length 5 3.1 General . 5 3.2 Standard gauge plates for components with axial wire terminations . 5 3.3 Special gauge plates for components w
18、ith glass-metal seals or other discontinuities in their axial wire terminations 7 4 Coating material extending onto wire terminations 8 5 Overall body diameter 9 6 Information to be given in the relevant specification 10 Annex A (informative) Cross-reference 11 Bibliography 12 Figure 1 Standard gaug
19、e plates . 6 Figure 2 Special gauge plates 7 Figure 3 Gauge plate for checking coating material extended onto a wire termination 8 Figure 4 Straight tube diameter gauge . 9 Table 1 Slot width or hole diameter for standard gauge plates . 6 Table A.1 Cross reference . 11 BS EN 60294:201260294 IEC:2012
20、 5 MEASUREMENT OF THE DIMENSIONS OF A CYLINDRICAL COMPONENT WITH AXIAL TERMINATIONS 1 Scope This International Standard applies to cylindrical capacitors and resistors for use in electronic equipment. This standard gives methods for measurement of the body length and for checking the excessive prote
21、ctive coating extending onto the wire terminations of components with axial wire terminations. It further provides a method for checking the overall body diameter of cylindrical components with axial wire terminations. NOTE A measuring method for components with unidirectional terminations is given
22、in IEC 60717. 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 (inclu
23、ding any amendments) applies. IEC 60301, Preferred diameters of wire terminations of capacitors and resistors 3 Body length 3.1 General The length of the body shall be measured by inserting the wire terminations into slots or bores of a pair of gauge plates and by moving these plates parallel to eac
24、h other until the component body is clamped without deforming the body or the wire terminations. The plates shall be considered sufficiently close to paraIlel if, allowing for the size of plate and the distance between the component and the measuring device, the error in measurement due to this caus
25、e does not exceed 0,05 mm. Components with axial wire terminations shall be measured using the standard gauge plates of 3.2, unless glass-metal seals or other discontinuities in the wire terminations require the use of the special gauge plate of 3.3. 3.2 Standard gauge plates for components with axi
26、al wire terminations The gauge plate defined in Figure 1 shall be used for components with axial wire terminations, unless prescribed otherwise by the relevant specification. BS EN 60294:2012 6 60294 IEC:2012 Key L1 Length of the component body L2 Length of the wire terminations T Thickness of the g
27、auge plates W Slot width or bore diameter Figure 1 Standard gauge plates The width of the slot, or the diameter of the bore in the gauge plates, W, shall be selected from Table 1, according to the nominal diameter of the wire termination. Table 1 Slot width or hole diameter for standard gauge plates
28、 Diameter d aof the wire terminations Slot width W bin the gauge plates d 0,45 mm 0,45 mm d 0,70 mm 0,70 mm d 0,90 mm 0,90 mm d 1,15 mm 1,15 mm d 1,32 mm 1,32 mm d 2,00 mm (0,80 0,02) mm (1,00 0,02) mm (1,20 0,02) mm (1,50 0,02) mm (1,80 0,02) mm (3,00 0,02) mm aNominal diameter of the lead wire, pe
29、rmissible tolerance on the diameter d according to IEC 60301. bDimension W is the bore diameter if the gauge plates are made with cylindrical holes instead of slots. The prescribed tolerance of the slot width or bore diameter W only needs to be maintained near the prescribed inner chamfer of the slo
30、t or hole. The length of the component body L1shall be taken as the distance between the inside faces of the gauge plates. 45 W (0,20 0,02) mm Detail A A T L L L 1 2 2 IEC 1428/12 BS EN 60294:201260294 IEC:2012 7 The thickness T of the gauge plate shall be sufficient to ensure mechanical stability a
31、nd precision of the measurement; it has no significance to the length measurement. Unless otherwise specified by the relevant specification, the thickness T shall be T = (4,0 0,05) mm. The determination of the free length of a wire termination, L2, should be based on the same reference plane which i
32、s used to measure the length of the component body, i.e. the inner surface of the gauge plate. 3.3 Special gauge plates for components with glass-metal seals or other discontinuities in their axial wire terminations The gauge plate defined in Figure 2 shall be used for components with discontinuitie
33、s in their axial wire terminations, e.g. glas-metal seals or external welds, unless otherwise prescribed by the relevant specification. Key L1 Length of the component body L2 Length of the wire terminations T Thickness of the gauge plates W Slot width or bore diameter Figure 2 Special gauge plates T
34、he length of the component body L1shall be taken as the distance between the inside faces of the gauge plates. Unless otherwise specified by the relevant specification, the width of the slot, or the diameter of the bore in the gauge plates, W, shall be W = (4,0 0,02) mm. The prescribed tolerance of
35、the slot width or bore diameter W only needs to be maintained near the prescribed inner chamfer of the slot or bore. 45 W (2,0 0,02) mm Detail A A T L L L 1 2 2 IEC 1429/12 BS EN 60294:2012 8 60294 IEC:2012 The thickness T of the gauge plate shall be sufficient to ensure mechanical stability and pre
36、cision of the measurement; it has no significance to the length measurement. Unless otherwise specified by the relevant specification, the thickness T shall be T = (4,0 0,05) mm. The determination of the free length of a wire termination, L2,should be based on the same reference plane which is used
37、to measure the length of the component body, i.e. the inner surface of the gauge plate. 4 Coating material extending onto wire terminations If the relevant specification permits the extension of coating material onto the wire terminations, it shall prescribe a permissible length of excessive coating
38、 on a wire termination, cmax. If not prescribed directly, the permissible length shall be determined from 21maxLLcc= where Lcis the maximum component length between clean leads, as prescribed by the relevant specification; L1is the length of the component body. Compliance of a components coating mat
39、erial extending onto the wire terminations with such a prescribed maximum permissible extension length shall be checked by visual inspection of the wire termination protruding perpendicularly through the dedicated gauge plate, which is pressed against the component body without deforming the body or
40、 the wire terminations, see Figure 3. Key c Length of the excess coating on the wire terminations T Thickness of the gauge plates W Bore diameter or slot width Figure 3 Gauge plate for checking coating material extended onto a wire termination 45 W (0,20 0,02) mm Detail A A T c IEC 1430/12 BS EN 602
41、94:201260294 IEC:2012 9 The diameter of the bore, or the width of the slot in the gauge plates, W, shall be selected from Table 1 according to the nominal diameter of the wire termination. The thickness T of the gauge plate is determined by the permissible length of excessive coating to be checked T
42、 = (cmax 0,05 mm) where cmaxis the maximum length of coating on the wire termination, as prescribed by the relevant specification. 5 Overall body diameter Compliance of a components overall diameter with a prescribed maximum body diameter shall be checked by passing the component through a straight
43、tube diameter gauge, as shown in Figure 4. Key DTInner diameter of the straight tube LTLength of the straight tube TTWall thickness of the straight tube Figure 4 Straight tube diameter gauge The orifice of the diameter gauge is formed by the inner diameter DTof the straight tube, with DT= (Dmax+ 0,1
44、 mm) 0,05 mm where Dmaxis the maximum component body diameter, as prescribed by the relevant specification. The maximum diameter of the component, as given by the relevant specification, needs to take into account the permissible irregularities in the shape of the body, such as bow, caps on resistor
45、s and wire wrapping as part of the terminations of ceramic capacitors, etc. The length LTof the straight tube shall meet the following requirement LT Lmaxwhere Lmaxis the maximum component body length,as prescribed by the relevant specification. T L D T T T IEC 1431/12 BS EN 60294:2012 10 60294 IEC:
46、2012 The wall thickness TTof the straight tube shall be sufficient to ensure mechanical stability and precision of the measurement. The outer shape of the straight tube may deviate from the cylinder shown in Figure 3 as long as the prescribed dimensions are maintained. The component shall pass throu
47、gh the gauge by its own weight. 6 Information to be given in the relevant specification When this method is applied in a relevant specification, the following details shall be given as far as they are applicable: Clause a) the dimension(s) to be measured 3, 4, 5 b) the thicknes of the gauge plate(s)
48、 3.2, 3.3, 4 c) the bore diameter or slot width 3.2, 3.3, 4 BS EN 60294:201260294 IEC:2012 11 Annex A (informative) Cross-reference The revision of this standard has resulted in a new clause numbering. Table A.1 provides cross-references between the clause numbering of this edition compared to the f
49、irst edition of this standard. Table A.1 Cross reference IEC 60294:1969 1stedition Clause IEC 60294:2012 2ndedition Clause Notes 1 1 Scope and object are merged into one 2 2 New clause 3 3 4 4 5 5 6 New clause BS EN 60294:2012 12 60294 IEC:2012 Bibliography IEC 60717, Method for determination of the space required by capacitors and resistors with unidirectional terminations IEC 61192-3, Workmanship requirements for soldered
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