1、BRITISH STANDARD Ikansformers and inductors for use in electronic and telecommunication equipment Part 2. Sectional specification for signal transformers on the basis of the capability approval procedure The European Standard EN 612482 : 1997 has the status of a British standasd Ob a BS EN 61248-2 :
2、 1997 IEC 61248-2 : 1996 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW STD*BSI BS EN b1248-2-ENGL 1977 9 Lb24bb7 Ob58744 942 H BS EN 61248-2 : 1997 National foreword This British Standard is the English hguage version of EN 612482 : 1997. It is identical with IEC 612482 : 19
3、96. The UK participation in its preparation was entrusted to Technical Committee EPU51, llansfonners, inductors, magnetic components and ferrite materials, which has the responsibility to: - aid enquirers to understand the text; - present to the responsible internationaUEuropean committee any enquir
4、ies on the interpretation, or propods for change, and keep the UK interests informed; - monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. From 1 January 1997, all I
5、EC publications have the number 60000 added to the old number. For instance, IEC 27-1 has been renumbered as IEC 60027-1. For a period of time during the change over from one numbering system to the other, publications may contain identifiers from both systems. Cross-references Attention is drawn to
6、 the fact that CEN and CENELEC Standards normaiiy include an annex which liss normative references to international publications with their corresponding European publications. The British Stan b) a capability-approved manufacturer of signal transformers wishing to prepare specifications for his own
7、 products which are within the scope of his capability approval. .NOTES 1 The detail specification should take the form of the BDS shown in clause 5, particularly in respect of the front page format and, in principle, in respect of the presentation of the inspection requirements. 2 Unless otherwise
8、specified, all the tests shown in the BOS are taken from IEC 1007. Those shown underlined concern operating characteristics of fundamental importance, and it is strongly recommended that these are selected by the specification writer for inclusion in the detail specification. The tests shown in plai
9、n type are listed for the convenience of the specification writer, and tests should be selected from them according to the particular application of the component. 3 The specification writer may specify tests and sampling levels different from, less than, or additional to those given in the BOS STD-
10、BSI BS EN bL248-2-ENGL 1997 m lb24bb7 b513750 L4b Page 6 EN 61248-2 : 1997 3.1 General 3.1.1 these shall be fully specified in the detail specification. Where additional tests of a type not defined or invoked in IEC 1007 are required, 3.1.2 by the addition of the notation “(D)“. Any tests considered
11、 as being destructive shall be so denoted in the test schedule NOTE - The use of this notation is not illustrated in the BDS. 3.1.3 Tests shall be grouped in the schedule according to the level of sampling required and, unless otherwise indicated (see 4.1 b), in the order of testing required. Where
12、100 % testing is not required, inspection levels and acceptable quality levels shall be selected from IEC 410. 3.1.4 The completed detail specification shall be allocated a component identity number and issue status by the originator. NOTES 1 This number is chosen by the originator (manufacturer or
13、customer) within his own system. It is thus not subject to any external rules or codification. 2 In the special case of a manufacturers detail specification for a standard catalogue item which the manufacturer wishes to be listed in IEC OC 001004, the national committee will allocate an appropriate
14、number from its register. 3.1 -5 Additionally, a number shall be allocated by the component manufacturer to be in- cluded in the detail specification, comprising this specification number, his factory identi- fication code letters, and a unique number within his registration system, for example QC 2
15、601 00/PQR/1234. NOTE - Ater a detail specification has been allocated the manufacturers reference number in accor- dance with 3.1.5, it is to be considered a contractual part of the order. Copies of all such detail specifications are to be retained by the manufacturers chief inspector. 3.2 Ratings
16、and characteristics 3.2.1 Ratings In the case of customer-originated detail specifications, customer and manufacturer agreement shall be obtained on the ratings to be ascribed to the component in the detail specification. These ratings shall not exceed the scope of the manufacturers capability appro
17、val (see also 1.12 of IEC 1248-1). 3.2.2 Characteristics A customer shall prescribe in the detail specification any characteristic required for a component. 3.3 Outline drawings and winding schematic diagram 3.3.1 The detail specification shall incorporate a drawing of the transformer showing import
18、ant features, such as those dimensions affecting interchangeability, restrictions on mounting, and marking requirements. Page 7 EN 61248-2 : 1997 3.3.2 The detail specification shall incorporate a schematic diagram showing all windings, screens, taps and phasings, and giving termination identificati
19、on. 4 Inspection requirements to be listed in the detail specification 4.1 Conformance inspection The detail specification shall incorporate the following notes: a) sampling inspections shall be carried out in accordance with IEC 410, normal inspection; b) tests in a group may be carried out in any
20、order, except where otherwise indicated (see 3.1.3); c) components submitted to any tests marked (D) may not be released under IEC 1248-1 capability approval (D = destructive); d) the values given for measurement limits are absolute values: measurement uncertainty is to be taken into account. 4.2 De
21、sign verification The tests to be detailed under this heading are those which the specification writer considers to be inappropriate to lot-by-lot release, but appropriate to the verification of new and original designs. Accordingly, they are to be performed only when specifically so stated in the o
22、rder, and the detail specification shall carry a statement to this effect. If design verification is required, the number of specimens and the requirement that there shall be no failures shall be stated in the detail specification. NOTE - Two specimens should normally be provided, unless otherwise s
23、tated. 5 Detail speclflcation The BDS which follows, when completed in accordance with clause 3, shall form the relevant detail specification. NOTE - The front page of the BDS has been based upon the need for a customers detail specification. Where a manufacturers detail specification is required, s
24、ome changes will be necessary, but the basic for- mat should be retained. STD-BSI BS EN bL248-2-ENGL 1997 E Zb24bb7 b58752 TL9 Page 8 EN 61248-2 : 1997 Blank detail specification I Sheet 1 (of 5) Originators component identity number Specification available from: I ISSUE STATUS I -DATE ELECTRONIC CO
25、MPONENTS OF ASSESSED QUALITY: DETAIL SPECIFICATION IN ACCORDANCE WITH IEC 1248-2 (QC 260100) SIGNAL TRANSFORMER BRIEF TECHNICAL DESCRIPTION 1) Core type and type of construction 2) Range of core size, input signal level, frequency range For detail dimensions and schematic diagram, see sheet 5. IECQ
26、Register of approvals (QC 001005, Part 2, Section 1) Rules for variants Additional capability Manufacturer Address Capability approval No. Manufacturers reference number QC 260 1001PQW1234 (Continued on page 17) Page 9 EN 61248-2 : 1997 Signal transformer according to IEC 1248-2 (QC 260100) RATINGS
27、AND CHARACTERISTICS (see 3.2 Of IEC 1248-2) Blank detail speciflcation (continued) Originators component identity number I Sheet 2 (of 5) ISSUE STATUS DATE Climatic category (see 3.2.2.2 of IEC 1248-1 (QC 260000) Maximum temperature range (storageltransport) Maximum temperature rise Mass _ Vibration
28、 (sinusoidal) (see IEC 68-2-6) Bump (see IEC 68-2-29) I Shock (see IEC 68-2-27) I Solderability (see IEC 68-2-20) Robustness of terminations (see IEC 68-2-21) Rapid change of temperature (see test Na of IEC 68-2-14) Frequency range and response Input signal level Impedances I Source Load I I voltage
29、 transformation ratio I Peak working voltage I Direct current in windings I (Continued on page 79) Page 10 EN 61248-2.:- 19917_. . Originators component identity number Signal transformer according to IEC 1248-2 (QC 260100) ISSUE STATUS I INSPECTION REQUIREMENTS (see notes) DATE IEC 1007 Performance
30、 requirements IL AQL reference and conditions of test TEST SAQL Blank detail specification (continued) Sheet 3 (of 5) 4.4.2.3 4.4.15 4.5.16 The insulation resistance shall be measured immediately after conditioning: that is, after the maximum winding temperature has been maintained for 6 h or more,
31、or after two measurements of winding resistance at intervals of 30 min give the same result, whichever is the lesser period DESIGN VERIFICATION ONLY: two specimens, no failures (see 4.2 of IEC 1248-2) Design verification inspection comprises those tests listed below plus all those selected for confo
32、rmance inspection. Design verification tests shall only be performed when specifically invoked by the relevant order. s 1997-. Signal transformer according to IEC 1248-2 (QC 260100) OUTLINE DRAWING SCHEMATIC ISSUE STATUS DATE Drawing in accordance with IS0 128 and IS0 129 Dimensions in mm Third angl
33、e projection Drawing (see 3.3.1 of IEC 1248-2): as a minimum indicated Manufacturers name or trade mark Production lot number or date code Marking: Type designation Schematic diagram (see 3.3.2 of IEC 1248-2): STD-BSI BS EN b1248-2-ENGL 1777 m 1b2qbbS Ob58757 5T H Page 13 EN 61248-2 : 1997 Annex ZA
34、(normative) Normative references to international publications with their corresponding European publications This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate piaces in the text and the publ
35、ications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including a
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