1、 H LbZqbb Ob87899 TqO 9 BRITISH STANDARD Tkansforrners and inductors for use in electronic and telecommunication equipment Part 7. Sectional specification for high-frequency inductors and intermediate transformers on the basis of the capability approval procedure It Kn * The European Standard EN 612
2、487 : 1997 has the status of a British Standard BS EN 61248-7 : 1998 1997 IEC 61248-7 : NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW lbZLibb9 bAA95 987 m BS EN 61248-7 : 1998 This British Standard, having been prepared under the direction of the Electrotechnicai Sector Boar
3、d, was published under the authority of the Standards Board and comes into effect on 15 March 1998 National foreword This British Standard is the English language version of EN 612487 : 1997. It is identical with IEC 612487 : 1997. The UK participation in its preparation was entrusted to Technical C
4、ommittee EPIJ51, Ihwformers, inductom, magnetic components and ferrite materials, which has the responsibfity to: - aid enquirers to understand the text; - present to the responsible internajonaM3uropean committee any enquiries on the interpretation, or proposals for change, and keep the UK interest
5、s 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 IEC publications have the number 60000 added to the old number. For instanc
6、e, 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 the fact that CEN and CENELEC standards normally include an annex which l
7、ists normative references to international publications with their corresponding European publications. The British Standards which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled International Smdards Correspondence Index
8、, or by using the Find facility of the BSI Stan b) a capability approved manufacturer of high-frequency inductors and intermediate frequency transformers wishing to prepare specifications for his own products which are within the scope of his capability approval. NOTES 1 The detail specification sho
9、uld 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 specified, all the tests shown in the BDS, with the exception of the rotating torque, characteristic u
10、nder pressure, strength of adjusting mechanism, resonance frequency and inductance tests given in annex A, are taken from IEC 61007. Those shown underlined concern operating characteristics of fundamental importance and it is strongly recommended that these are selected by the specification writer f
11、or inclusion in the detail specification. The tests shown in plain 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 differ
12、ent from, less than, or additional to those given in the BDS. 3.1 General 3.1.1 Where additional tests of a type not defined or invoked in this specification or IEC 61007 are required, these shall be fully specified in the detail specification. Page 6 EN 61248-7 1997 3.1.2 Any tests considered as be
13、ing destructive shall be so denoted in the test schedule by the addition of the notation (D). 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 ord
14、er of testing required. Where 100 % testing is not required, inspection levels and acceptable quality levels shall be selected from IEC 6041 O. 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
15、 the originator (manufacturer or customer) within his own system. It is thus not subject to any external rules or codification. 2 In the case of a manufacturers detail specification for a standard catalogue item which the manufacturer wishes to be listed in IEC QC 001004, the national committee will
16、 allocate an appropriate number from its register. 3.1.5 A number allocated by the component manufacturer shall additionally be included in the detail specification, comprising this specification number, his factory identification code letters and a unique number within his registration system, e.g.
17、 QC 260600/PQR/1234. NOTE - After a detail specification number has been allocated by the manufacturers reference number, in accordance 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
18、. 3.2 Ratings 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 ca
19、pability approval (see also 1.12 of IEC 61248-1). 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
20、 showing important features, such as those dimensions affecting interchangeability, restrictions on mounting and marking requirements. 3.3.2 The detail specification shall incorporate a schematic diagram showing all windings, screens, taps and phasings and giving termination identification. 4 Inspec
21、tion requirements to be listed in the detail specification 4.1 Conformance inspection The detail specification shall incorporate the following notes: m Lb24bb9 b89902 Li7 m Page 7 EN 61248-7 : 1997 a) sampling inspection shall be carried out in accordance with IEC 60410, normal inspection; b) tests
22、in a group may be carried out in any order, except where otherwise indicated (see 3.1.3); c) components submitted to any tests marked (D) may not be released under QC 260000 capability approval (D = destructive); d) the values given for measurement limits are absolute values: measurement uncertainty
23、 is to be taken into account. 4.2 Design 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 design. Accordingly, they are to be performed only w
24、hen specifically so stated in the order, 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 norma
25、lly be provided, unless otherwise stated. 5 Detail specification 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
26、detail specification is required, some changes will be necessary, but the basic format should be retained. lbZqbb9 b89903 883 9 Page 8 EN 61248-7 : 1997 Blank detail specification Sheet 1 (of 7) Originators component identity number Specification available from: I ISSUE STATUS ELECTRONIC COMPONENTS
27、OF ASSESSED QUALITY: (QC 260600) DETAIL SPECIFICATION IN ACCORDANCE WITH IEC 61248-7 HIGH-FREQUENCY INDUCTOR AND INTERMEDIATE FREQUENCY TRANSFORMER BRIEF TECHNICAL DESCRIPTION 1) Core type and type of construction 2) Range of core size, frequency range, inductance range, Q factor For detail dimensio
28、ns and schematic diagram see sheet 7. IECQ register of approval (QC 001005, Part 2, Section 1) Rules for variants _ Additional capability Manufacturer Address Capability approval No. QC 280600/PQR/1234 Manufacturers reference number (Continued on page 17) Page 9 EN 61248-7 : 1997 High-frequency indu
29、ctor and intermediate frequency transformer according to IEC 61248-7 (QC 260600) RATINGS AND CHARACTERISTICS (see 3.2 of IEC 61248-7) * * m ISSUE STATUS DATE Blank detail specification (continued) Sheet 2 (of 7) Winding function I Originators component identity number Winding I Climatic category (se
30、e 3.2.2.2 of IEC 61248-1 (QC 260000) 1 Maximum temperature range (storage/transport) Mass Vibration (sinusoidal) (see IEC 60068-2-6) 1 I Bump (see IEC 60068-2-29) Shock (see IEC 60068-2-27) Solderability (see IEC 60068-2-20) I Robustness of terminations (see IEC 60068-2-21) Rapid change of temperatu
31、re (see test Na of IEC 60068-2-14) Cold (see IEC 60068-2-14) Dry heat (see IEC 60068-2-2) 1 Damp heat, steady state (see IEC 60068-2-3) 11 2 3 4 Input signal level Impedances: Source Load 1 1 1 Voltage transformation ratio Temperature characteristics at resonant frequency or inductance (Continued on
32、 page 19) = Lb24bb9 Ub9905 b5b = High-frequency inductor and intermediate frequency transformer according to IEC 61248-7 (QC 260600) INSPECTION REQUIREMENTS (see notes) IEC 61007 AQL reference TEST IL SAQL Page 10 EN 61248-7 : 1997 ISSUE STATUS DATE Performance requirements and conditions of test Bl
33、ank detail specification (continued) Sheet 3 (of 7) Insulation resistance Fire hazard Short-term endurance (load run) As required 4.4.2.3 As required 4.5.16 As required 4.6.1 Rotating torque Characteristic under pressure Strength of adjusting mechanism (Continued on page 21) As required - 1) As requ
34、ired - 2) As required - 3) Cafetv screens Safetv screen Dosition 100 % 4.4.10.2 s1 1 % 4.2.1 Page 11 EN 61248-7 : 1997 DATE I Performance requirements and conditions of test Blank detail specification (continued) Sheet 4 (of 7) ilisual inspection 3imensionina and aauainq rocedure Voltage transformat
35、ion atio - riginators component identity number iigh-frequency inductor and intermediate frequency ransformer according to IEC 61248-7 (QC 260600) NSPECTION REQUIREMENTS (see notes) II 0.25 4.2 II 0.25 4.3 Il 0,25 4.4.7.1 TEST Qualitv factor, Q II Effective inductance and II effective resistance Fre
36、auencv response Il IL 0,25 4.4.3.3 0,251 4.4.4.1 0,25 4.4.10 IEC 61007 reference AQL I I I I TEST ON COMPLETED COMPONENTS ISSUE STATUS Electric strenath test) I100 % I 4.4.2.1 I (Continued on page 23) Page 12 EN 61248-7 : 1997 High-frequency inductor and intermediate frequency transformer according
37、to IEC 61248-7 (QC 260600) INSPECTION REQUIREMENTS (see notes) Blank detail specification (continued) Sheet 5 (of 7) ISSUE STATUS DATE I Originators component identity number Insulation resistance (standard atmosphere) Insertion loss II 0,25 4.4.2.3 To be carried out under standard atmospheric condi
38、tions II 0,25 4.4.9.1 TEST Return loss Phase test (polarity) Performance requirements and conditions of test II 0,25 4.4.9.2 II 0,25 4.4.17 1 % 1% 4.4.4.2 - 1) Leakage inductance, i, I S4 Resonance frequency Resonance frequency tuning range Rated inductance Rated inductance tuning range DC winding r
39、esistance s4 s4 s4 s4 s1 I s1 Continuity 1% 1 % 1 0%. 4.4.1.1 4.4.1.2 4.4.5.3 Impedance unbalance s1 Voltage unbalance SI 1 % 4.4.5.5 Page 13 EN 61248-7 : 1997 High-frequency inductor and intermediate frequency transformer according to IEC 61 248-7 (OC 260600) INSPECTION REQUIREMENTS (see notes) IEC
40、 61007 AQL reference TEST IL Blank detail specification (continued) ISSUE STATUS DATE Performance requirements and conditions of test s1 s1 s1 s1 Resistance unbalance 1 Yo 4.4.5.6 1 Yo 4.4.6.1 1 Yo 4.4.6.2 1 Yo 4.4.8.1 Self-capacitance (distributed capacitance) s1 s1 Interwinding capacitance Inheren
41、t self-resonance Resonant assemblies (if specified) Total harmonic distortion 1 Yo 4.4.8.2 1 Yo 4.4.13 Magnetic shielding s1 s1 Magnetic radiation (if specified) 1 Yo 4.4.21.1 1 Yo 4.4.21.3 Insert additional tests as required: NOTES 1 Sampling inspection is to be carried out in accordance with IEC 6
42、0410, normal inspection. 2 Tests in a group may be carried out in any order, except where otherwise indicated (see 3.1.3 of IEC 61248-7). 3 Components submitted to any tests marked (D) may not be released under IEC 61248-1 (QC 260000) capability approval. 4 The values given for measurement limits ar
43、e absolute values: measurement uncertainty is to be taken into account. (Continued on page 27) Page 14 EN 61248-7 : 1997 High-frequency inductor and intermediate frequency transformer according to IEC 61248-7 (QC 260600) OUTLINE DRAWING SCHEMATIC Blank detail specification (concluded) Sheet 7 (of 7)
44、 ISSUE STATUS DATE Drawing in accordance with IS0 128 and IS0 129 Dimensions in millimetres Third angle projection Drawing (see 3.3.1 of IEC 61248-7): Marking: Type designation Manufacturers name or trade mark Production lot number or date code as a minimum position to be indicated Schematic diagram
45、 (see 3.3.2 of IEC 61248-7): as a minimum position to be indicated Page 15 EN 61248-7 : 1997 Annex A (normative) Test methods peculiar to coils or intermediate frequency transformers A.1 Rotating torque A.l.l Testing device The device shall be a rotating torque measuring apparatus which can measure
46、the torsional moment of the adjusting core accurately. A.1.2 Testing method Mount the coil or intermediate frequency transformers (IFT) under test with the groove of the adjusting core facing upward. Rotate the adjusting core with an adjusting driver or the like, both clockwise and counter-clockwise
47、, quietly at a constant speed and examine whether the rotating torques of the adjusting core satisfy the values specified in the detail specification or not. A.1.3 Items to be specified in detail specification The following item shall be specified in detail specifications. A. 1.3.1 Shape of adjustin
48、g driver (if necessary, see A. 1.2) A.2 Characteristic under pressure A.2.1 Testing device The device shall be capable of maintaining the force specified in table A.l. A.2.2 Testing method Measure the resonance frequency while the force specified in table A.l is applied to the upper surface of the a
49、djusting core of coil or IFT under test through a cylindrical resin rod, unless otherwise specified in the detail specification. Remove the force and measure the resonance frequency. Then calculate the change of the resonance frequency after removal of the applied force. Table A.l - Pressurizing force Outside diameter of adjusting screw, D mrn As specified in the detail specification I I 4,90 (500) 1 36 R LX L CO S D V signal generator resistor coil or IFT under test inductance of coil or IFT under test distributed
