EN 61248-2-1997 en Transformers and Inductors for Use in Electronic and Telecommunication Equipment Part 2 Sectional Specification for Signal Transformers on the Basis of the Capab.pdf
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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
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