SIST EN 60938-2:2002
(Main)Fixed inductors for electromagnetic interference suppression -- Part 2: Sectional specification
Fixed inductors for electromagnetic interference suppression -- Part 2: Sectional specification
Applies to fixed conductors designed for electromagnetic interference suppression and which fall within the scope of the generic spedification, EN 60938-1. It is restricted to fixed inductors for which safety tests are appropriate. This implies that inductors specified according to this specification will either be connected to mains supplies, when compliance with the mandatory test of table 1 is necessary, or used in other circuit positions where the equipment specification prescribes that some or all of these safety tests are required. It applies to fixed inductors which will be connected to an a.c. mains or other supply with a nominal voltage not exceeding 1 000 V a.c.(r.m.s.) or d.c. between conductors and with a nominal frequency not exceeding 400 Hz.
Drosseln zur Unterdrückung elektromagnetischer Störungen -- Teil 2: Rahmenspezifikation
Inductances fixes d'antiparasitage -- Partie 2: Spécification intermédiaire
S'applique aux inductances fixes d'antiparasitage qui font partie du domaine d'application de la spécification générique. L'objet de cette norme est de prescrire les exigences normales pour la protection contre les dangers de choc électrique et les valeurs normales des caractéristiques, et de choisir, dans la spécification générique, les méthodes d'essai appropriées et de fixer les exigences générales pour les inductances d'antiparasitage.
Fixed inductors for electromagnetic interference suppression - Part 2: Sectional specification (IEC 60938-2:1999)
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Fixed inductors for electromagnetic interference suppression - Part 2: Sectional specification (IEC 60938-2:1999)Drosseln zur Unterdrückung elektromagnetischer Störungen -- Teil 2: RahmenspezifikationInductances fixes d'antiparasitage -- Partie 2: Spécification intermédiaireFixed inductors for electromagnetic interference suppression -- Part 2: Sectional specification29.180Transformatorji. DušilkeTransformers. ReactorsICS:Ta slovenski standard je istoveten z:EN 60938-2:1999SIST EN 60938-2:2002en01-september-2002SIST EN 60938-2:2002SLOVENSKI
STANDARD
SIST EN 60938-2:2002
SIST EN 60938-2:2002
SIST EN 60938-2:2002
SIST EN 60938-2:2002
SIST EN 60938-2:2002
IEC 60938-2Edition 2.0 1999-11INTERNATIONAL STANDARD NORME INTERNATIONALEFixed inductors for electromagnetic interference suppression –
Part 2: Sectional specification
Inductances fixes d'antiparasitage –
Partie 2: Spécification intermédiaire
INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQUE INTERNATIONALE VICS 29.100.10; 31.020 PRICE CODECODE PRIXISBN 2-8318-9906-0QC 280100
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale SIST EN 60938-2:2002
– 2 – 60938-2 © IEC:1999 CONTENTS FOREWORD.4 1 General.6 1.1 Scope.6 1.2 Object.6 1.3 Normative references.6 1.4 Information to be given in a detail specification.7 1.4.1 General.7 1.4.2 Outline drawing and dimensions.7 1.4.3 Mounting.8 1.4.4 Ratings and characteristics.8 1.4.5 Marking.8 1.5 Definitions.8 1.6 Marking.8 2 Preferred ratings and characteristics.9 2.1 Climatic categories.9 2.2 Values of ratings.9 2.2.1 Rated inductance and tolerance.9 2.2.2 Rated voltage (UR).9 2.2.3 Category voltage (UC).9 2.2.4 Rated temperature.9 2.2.5 Rated current.9 2.2.6 Passive flammability.9 3 Quality assessment procedures.10 3.1 Primary stage of manufacture.10 3.2 Structurally similar inductors.10 3.3 Certified records of released lots.10 3.4 Qualification approval.10 3.4.1 Qualification approval on the basis of the fixed sample size procedures.10 3.5 Quality conformance inspection.13 3.5.1 Formation of inspection lots.13 3.5.2 Test schedule.14 3.5.3 Delayed delivery.14 4 Test and measurement procedures.14 4.1 Visual examination and check of dimensions.14 4.1.1 Dimensions (gauging).14 4.1.2 Dimensions (detail).14 4.2 Voltage proof.14 4.3 Insulation resistance.15 4.4 Inductance.15 4.5 DC line resistance.15 4.6 Robustness of terminations.16 4.7 Resistance to soldering heat.16 4.7.1 Conditions.16 4.7.2 Final inspection, measurements and requirements.16 4.8 Solderability.16 4.9 Rapid change of temperature.16 SIST EN 60938-2:2002
60938-2 © IEC:1999 – 3 – 4.10 Vibration.16 4.11 Bump.17 4.12 Shock.17 4.13 Container sealing.18 4.14 Climatic sequence.18 4.14.1 Initial measurements.18 4.14.2 Dry heat.18 4.14.3 Damp heat, cyclic, test Db, first cycle.18 4.14.4 Cold.18 4.14.5 Low air pressure.18 4.14.6 Damp heat, cyclic, test Db, remaining cycles.18 4.14.7 Final inspection, measurements and requirements.19 4.15 Damp heat, steady state.19 4.15.1 Final inspection, measurements and requirements.19 4.16 Temperature rise (applies only to inductors with a mass > 5 g).19 4.16.1 Test method.19 4.16.2 Requirements.20 4.17 Impulse voltage (applies to inductors with more than one winding).20 4.17.1 Initial measurements.20 4.17.2 Requirements.20 4.18 Endurance.20 4.18.1 Test conditions – Endurance current test.20 4.18.2 Test conditions – Endurance voltage test between terminations (applies to inductors with more than one winding).21 4.19 Passive flammability (if applicable).21 4.20 Component solvent resistance (if applicable).21 4.21 Solvent resistance of marking (if applicable).21 Annex A (normative)
Test schedule for safety tests only approval.22 Annex B (normative)
Test schedule for safety tests and performance tests for qualification approval, assessment level D.25 Annex C (normative)
Example of a suitable circuit for the endurance test voltage.30 Annex D (normative)
Declaration of design (confidential to the manufacturer and the certification body).31 Annex E (normative)
Test methods for thyristor electromagnetic
interference suppression inductors.32
Figure C.1 – Endurance test circuit.30 Figure E.1 – Test circuit for temperature rise.32 Figure E.2 – Test circuit for interference voltage attenuation.33
Table 1 – Sampling plan for safety tests only.12 Table 2 – Sampling plan for safety tests and performance tests, assessment level D.13 Table 3 – Measuring points.15 Table 4 – Acceleration.16 Table 5 – Sweep cycles.17 Table 6 – Preferred severities.18
SIST EN 60938-2:2002
– 4 – 60938-2 © IEC:1999 INTERNATIONAL ELECTROTECHNICAL COMMISSION ____________
FIXED INDUCTORS FOR ELECTROMAGNETIC INTERFERENCE SUPPRESSION –
Part 2: Sectional specification
FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC 60938-2 has been prepared by IEC technical committee 40: Capacitors and resistors for electronic equipment. This second edition cancels and replaces the first edition published in 1988. This bilingual version, published in 2008-08, corresponds to the English version. The text of this standard is based on the following documents: FDIS Report on voting 40/1111/FDIS 40/1137/RVD
Full information on the voting for the approval of this standard can be found in the report on voting indicated in the above table. SIST EN 60938-2:2002
60938-2 © IEC:1999 – 5 – The French version of this standard has not been voted upon. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. A list of all parts of the IEC 60938 series, under the general title: Fixed inductors for electromagnetic interference suppression, can be found on the IEC website. The QC number that appears on the front cover of this publication is the specification number in the IEC Quality Assessment System for Electronic Components (IECQ). The committee has decided that the contents of this publication will remain unchanged until the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in the data related to the specific publication. At this date, the publication will be
• reconfirmed, • withdrawn, • replaced by a revised edition, or • amended.
SIST EN 60938-2:2002
– 6 – 60938-2 © IEC:1999 FIXED INDUCTORS FOR ELECTROMAGNETIC INTERFERENCE SUPPRESSION –
Part 2: Sectional specification
1 General 1.1 Scope This International Standard applies to fixed inductors designed for electromagnetic interference suppression and which fall within the scope of the generic specification, IEC 60938-1. It is restricted to fixed inductors for which safety tests are appropriate. This implies that inductors specified according to this specification will either be connected to mains supplies, when compliance with the mandatory tests of Table 1 is necessary, or used in other circuit positions where the equipment specification prescribes that some or all of these safety tests are required. This standard applies to fixed inductors which will be connected to an a.c. mains or other supply with a nominal voltage not exceeding 1 000 V a.c. (r.m.s.) or d.c. between conductors and with a nominal frequency not exceeding 400 Hz. 1.2 Object The object of this standard is to prescribe standard requirements for safety tests and standard ratings and characteristics, to select from IEC 60938-1 the appropriate methods of test and to give general performance requirements for suppression inductors. Test severities and performance requirements prescribed in detail specifications referring to this sectional specification shall be of equal or higher performance level. In addition, the minimum require-ments for safety tests specified herein always apply. 1.3 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60060-1:1989, High-voltage test techniques – Part 1: General definitions and test requirements IEC 60063:1963, Preferred number series for resistors and capacitors
Amendment 1 (1967) Amendment 2 (1977) IEC 60068-1, Environmental testing – Part 1: General and guidance IEC 60085:1984, Thermal evaluation and classification of electrical insulation1) IEC 60279:1969, Measurement of the winding resistance of an a.c. machine during operation at alternative voltage2) IEC 60294, Measurement of the dimensions of a cylindrical component having two axial terminations ___________ 1) A new edition of this publication exists. 2) Withdrawn SIST EN 60938-2:2002
60938-2 © IEC:1999 – 7 – IEC 60384-14, Fixed capacitors for use in electronic equipment – Part 14: Sectional specification: Fixed capacitors for electromagnetic interference suppression and connection to the supply mains IEC 60938-1:1999, Fixed inductors for electromagnetic interference suppression – Part 1: Generic specification IEC 60938-2-1:1999, Fixed inductors for electromagnetic interference suppression – Part 2-1: Blank detail specification – Inductors for which safety tests are required – Assessment level D IEC 60938-2-2:1999, Fixed inductors for electromagnetic interference suppression – Part 2-2: Blank detail specification – Inductors for which safety tests are required (only) CISPR 16-1-1:2003, Specification for radio disturbance and immunity measuring apparatus and methods – Part 1-1: Radio disturbance and immunity measuring apparatus – Measuring apparatus3) CISPR 16-1-2:2003, Specification for radio disturbance and immunity measuring apparatus and methods – Part 1-2: Radio disturbance and immunity measuring apparatus – Ancillary equipment – Conducted disturbances ISO 3:1973, Preferred numbers – Series of preferred numbers 1.4 Information to be given in a detail specification 1.4.1 General Detail specifications shall be derived from the relevant blank detail specification.
Detail specifications shall not specify requirements inferior to those of the generic or sectional specification. When more severe requirements are included they shall be listed in 1.8 of the detail specification and indicated in the test schedules, for example by an asterisk. NOTE The information given in 1.4.2 may, for convenience, be presented in tabular form. The information given in 1.4.2 to 1.4.5 shall be given in each detail specification and the values quoted shall preferably be selected from those given in the appropriate clause of this sectional specification. 1.4.2 Outline drawing and dimensions There shall be an illustration of the inductor as an aid to easy recognition and for comparison of the inductor with others. Dimensions and their associated tolerances, which affect interchangeability and mounting, shall be indicated upon the drawing. All dimensions shall be stated in millimetres. Normally the numerical values shall be given for the length of the body, the width and height of the body or for cylindrical types, the body diameter, and the length and diameter of the terminations. When necessary, for example when a number of items (inductance values/ voltage ranges) are covered by a detail specification, the dimensions and their associated tolerances shall be placed in a table below the drawing. When the configuration is other than described above, the detail specification shall state such dimensional information as will adequately describe the inductor. When the inductor is not designed for use on printed boards, this shall be clearly stated in the detail specification. ___________ 3) A new edition of this publication exists. SIST EN 60938-2:2002
– 8 – 60938-2 © IEC:1999 1.4.3 Mounting The detail specification shall specify the method of mounting to be recommended for normal use and the method which is mandatory for the application of the vibration, bump and shock tests. The design of the inductor may be such that special mounting fixtures are required in its use. In this case, the detail specification shall describe the mounting fixtures and they shall be used in the application of the bump, shock and vibration tests. The specified heat sink shall be used in the application of the endurance test. 1.4.4 Ratings and characteristics The ratings and characteristics shall be in accordance with the relevant clauses of this specification. 1.4.4.1 Additional characteristics may be listed, when they are considered necessary to specify adequately the inductor for design and application purposes. 1.4.5 Marking Deviations from 1.6 of this sectional specification, shall be specifically stated in the detail specification. 1.5 Definitions For the purpose of this International Standard, the definitions in IEC 60938-1 apply. 1.6 Marking 1.6.1 The information given in the marking is normally selected from the following list; the relative importance of each item is indicated by its position in the list: a) manufacturer's name (or trade mark); b) manufacturer's type designation; c) recognized approval mark; d) rated inductance and tolerance; e) rated voltage; f) rated current; g) identification of terminations or circuit diagram; h) rated temperature; i) climatic category; j) year and month (or week) of manufacture (this may be in code form); k) reference to the detail specification. 1.6.2 Marking of the inductor may be omitted when the manufacturer considers that there is insufficient space, and this fact is recorded in the detail specification. When present, the marking shall be sufficient to provide a clear identification of the inductor. Any duplication of information in the marking on the inductor should be avoided. 1.6.3 The packaging containing the inductor(s) shall be clearly marked with all the information listed in 1.6.1, except g). 1.6.4 Any additional marking shall be so applied that no confusion can arise. SIST EN 60938-2:2002
60938-2 © IEC:1999 – 9 – 2 Preferred ratings and characteristics 2.1 Climatic categories Electromagnetic interference suppression inductors covered by this specification are classified into climatic categories according to the general rules given in IEC 60068-1. The lower and upper category temperatures and the duration of the damp heat, steady state test shall be selected from the following: Lower category temperature: –65 °C, –55 °C, –40 °C, –25 °C and –10 °C. Upper category temperature: +85 °C, +100 °C, +125 °C and +155 °C. Duration of the damp heat, steady state test: 21 and 56 days. The severities for the cold and dry heat tests are the lower and upper category temperatures respectively. 2.2 Values of ratings 2.2.1 Rated inductance and tolerance Preferred values of rated inductance are values chosen from the E 6 series of preferred values given in IEC 60063. The preferred tolerances on rated inductance are as follows: ±30 %; –30 %/+50 %. 2.2.2 Rated voltage (UR) Preferred values for rated voltages are: AC inductors: 50 V, 125 V, 250 V, 400 V, 440 V, 480 V and 760 V. DC inductors: 50 V, 160 V, 250 V and 500 V. NOTE Electromagnetic interference suppression inductors are normally chosen to have their rated voltage equal to or greater than the nominal voltage of the supply system to which they are to be connected. It should, however, be borne in mind that the voltage of the system may rise up to 10 % above the nominal voltage. 2.2.3 Category voltage (UC) The category voltage is equal to the rated voltage, unless otherwise stated in the detail specification. 2.2.4 Rated temperature The rated temperature shall not be lower than +40 °C. 2.2.5 Rated current The preferred values of rated current are selected from the R10 series of ISO 3. 2.2.6 Passive flammability When specified, the minimum category of passive flammability permitted is category C. SIST EN 60938-2:2002
– 10 – 60938-2 © IEC:1999 3 Quality assessment procedures 3.1 Primary stage of manufacture See 3.2 of IEC 60938-1. 3.2 Structurally similar inductors Inductors are structurally similar when for their range of inductance values they have the following common characteristics: a) essentially the same materials; b) similar design features and manufacturing techniques; c) same rated voltage. 3.3 Certified records of released lots When certified test records are requested by a purchaser, they shall be specified in the detail specification. 3.4 Qualification approval The procedures for qualification approval testing for structurally similar inductors are given in 3.4 of IEC 60938-1. 3.4.1 Qualification approval on the basis of the fixed sample size procedures 3.4.1.1 Sampling This standard covers procedures for qualification approval tests only. Two alternative test procedures are given, namely the full test procedure covering both safety tests and performance requirements, and a restricted test procedure covering safety tests. Table 1 and Annex A form the schedule limited to tests for safety tests only approval. Prior to the approval testing for safety tests only it is necessary to submit to the certification body a declaration of design (Annex D) registering essential data and basic design details of the inductors for which approval is sought. Table 2 and Annex B form the full schedule for safety tests and performance approval. Each rated voltage shall be separately qualified. The total number of inductors of each rated voltage to be tested in each group is given in Table 1 or 2. For each rated voltage, the sample shall contain equal numbers of specimens of the highest and lowest inductance and the highest and lowest rated current in the range to be qualified. Where only one inductance value or rated current value is involved, the total number of inductors as stated in Table 1 or 2 shall be tested. Spare specimens are permitted as follows: a) one per inductance/rated current combination which may be used to replace the permitted non-conforming items in group 0; b) one per inductance/rated current combination which may be used as replacements for specimens lost due to incidents not attributable to the manufacturer or the test sequence; c) the remainder of the spares may be required if it is necessary to repeat any test according to the provisions of Note 1 to Table 1 or 2; d) spares may be kept at the premises of the manufacturer instead of being sent to the testing station. SIST EN 60938-2:2002
60938-2 © IEC:1999 – 11 – The number of samples given in group 0 assume that all groups are applicable. If this is not so the numbers may be reduced accordingly. When additional groups are introduced into the qualification approval test schedule, the number of specimens required for group 0 shall be increased by the same number as that required for the additional groups. 3.4.1.2 Tests The complete series of tests specified in either Table 1 or 2 is required for the approval of a series of structurally similar inductors of one rated voltage. The tests of each group shall be carried out in the order given. The whole sample shall be subjected to the tests of group 0 and then divided for the other groups. Non-conforming items found during the tests of group 0 shall not be used for the other groups. "One non-conforming item" is counted when an inductor has not satisfied the whole or part of the tests of a group. The approval is granted when the number of non-conformances does not exceed the specified number of permissible non-conforming items for each group or subgroup and the total number of permissible non-conformances indicated in Table 1 or 2. NOTE Table 1 and Annex A or Table 2 and Annex B together form the fixed sample size test schedule, for which Table 1 or 2 includes the details for the sampling and permissible non-conforming items for the different tests or groups of tests, whereas Annexes A or B toge
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