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BS EN IEC 60938-2:2021

BS EN IEC 60938-2:2021

$167.15

Fixed inductors for electromagnetic interference suppression – Sectional specification on power line chokes

Published By Publication Date Number of Pages
BSI 2021 42
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This part of IEC 60938 applies to fixed inductors designed for electromagnetic interference suppression, which will be connected to an AC mains or other supply with a nominal voltage not exceeding 1 000 V AC RMS or 1 500 V DC with a nominal frequency not exceeding 400 Hz.

This sectional specification 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 Annex A is necessary, or used in other circuit positions where the equipment specification prescribes that some or all of these safety tests are required.

The object of this document is to prescribe standard requirements for safety tests, preferred ratings and characteristics, to select from IEC 60938-1 the appropriate methods of test and to give general performance requirements for suppression inductors.

PDF Catalog

PDF Pages PDF Title
2 undefined
5 Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
7 English
CONTENTS
10 FOREWORD
12 1 Scope
2 Normative references
13 3 Terms and definitions
14 4 General requirements
4.1 General
4.2 Preferred values of ratings and characteristics
4.2.1 Climatic categories
4.2.2 Nominal inductance and tolerance
4.2.3 Rated voltage UR
4.2.4 Rated temperature Tr
15 4.2.5 Rated current Ir
4.3 Information to be given in a detail specification
4.3.1 General
4.3.2 Outline drawing and dimensions
Figure 1 – Relation between ambient temperature and applied current
16 4.3.3 Mounting
4.3.4 Ratings and characteristics
4.4 Insulated inductors for power line applications
4.5 Marking
17 5 Safety tests for approval
5.1 General
5.1.1 Approval on the basis of the fixed sample size procedures
5.1.2 Structurally similar inductors
18 5.1.3 Sampling
5.2 Standard atmospheric conditions
5.3 Visual examination
5.3.1 Dimensions (gauging)
5.3.2 Dimensions (detail)
19 5.4 Insulation resistance
5.5 Voltage test
Tables
Table 1 – Test voltages
20 5.6 Inductance
5.7 Line resistance
5.8 Insertion loss (optional)
5.9 Temperature rise (applies to inductors with a mass > 5 g only)
5.9.1 General
5.9.2 Test method
21 5.9.3 Requirements
5.10 Impulse voltage (applies to inductors with more than one winding only)
5.10.1 Test conditions
5.10.2 Initial measurements
5.10.3 Requirements
5.11 Endurance
5.11.1 Test conditions – Endurance current test (applies to inductors with a mass < 5 g only)
22 5.11.2 Test conditions – Endurance voltage test between terminations (applies to inductors with more than one winding only)
5.11.3 Final inspection, measurements and requirements
5.12 Robustness of terminations
5.12.1 General
23 5.12.2 Test Ua1 – Tensile
5.12.3 Test Ub – Bending
5.12.4 Test Uc – Torsion
5.12.5 Test Ud – Torque
5.12.6 Test Ue – Robustness of terminations of SMD-components mounted on PCB
Table 2 – Force for tensile stress on terminations
Table 3 – Torque
24 5.13 Vibration
5.13.1 Test conditions
5.13.2 Requirements
5.14 Shock
5.14.1 Test conditions
Table 4 – Acceleration
Table 5 – Sweep cycles
25 5.14.2 Requirements
5.15 Resistance to soldering heat
5.16 Solderability (optional)
5.16.1 General
5.16.2 Preconditioning
5.16.3 Test procedure
5.16.4 Final inspection, measurements and requirements
5.17 Rapid change of temperature (optional)
Table 6 – Preferred severities
26 5.18 Container sealing (if applicable)
5.19 Climatic sequence (optional)
5.19.1 General
5.19.2 Dry heat
5.19.3 Damp heat, cyclic, test Db, first cycle
5.19.4 Cold
5.19.5 Low air pressure
5.19.6 Damp heat, cyclic, test Db, remaining cycles
5.19.7 Final inspection, measurements and requirements
27 5.20 Damp heat, steady state
5.21 Passive flammability (optional)
5.22 Glow wire (optional)
Table 7 – Severities and requirements for passive flammability
28 5.23 Ball pressure (optional)
5.24 Component solvent resistance
5.25 Solvent resistance of marking
29 Annex A (normative)Sampling plan
30 Annex B (normative)Test schedule
33 Annex C (normative)Declaration of design
34 Annex D (normative)Clearance
Table D.1 – Clearance distances
35 Annex E (normative)Creepage
36 Table E.1 – Creepage distances
37 Annex F (normative)Fully insulated winding wires
Table F.1 – FIW wires with their minimum test voltages
38 Annex X (informative)Cross-references for references to the previous edition of this document
Table X.1 – Cross-references
40 Bibliography

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