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.<\/p>\n
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.<\/p>\n
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.<\/p>\n
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|---|---|---|---|---|---|---|---|
| 2<\/td>\n | undefined <\/td>\n<\/tr>\n | ||||||
| 5<\/td>\n | Annex ZA (normative)Normative references to international publicationswith their corresponding European publications <\/td>\n<\/tr>\n | ||||||
| 7<\/td>\n | English CONTENTS <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | FOREWORD <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 1 Scope 2 Normative references <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 3 Terms and definitions <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 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 \u2013 Relation between ambient temperature and applied current <\/td>\n<\/tr>\n | ||||||
| 16<\/td>\n | 4.3.3 Mounting 4.3.4 Ratings and characteristics 4.4 Insulated inductors for power line applications 4.5 Marking <\/td>\n<\/tr>\n | ||||||
| 17<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 18<\/td>\n | 5.1.3 Sampling 5.2 Standard atmospheric conditions 5.3 Visual examination 5.3.1 Dimensions (gauging) 5.3.2 Dimensions (detail) <\/td>\n<\/tr>\n | ||||||
| 19<\/td>\n | 5.4 Insulation resistance 5.5 Voltage test Tables Table 1 \u2013 Test voltages <\/td>\n<\/tr>\n | ||||||
| 20<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 21<\/td>\n | 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 \u2013 Endurance current test (applies to inductors with a mass < 5 g only) <\/td>\n<\/tr>\n | ||||||
| 22<\/td>\n | 5.11.2 Test conditions \u2013 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 <\/td>\n<\/tr>\n | ||||||
| 23<\/td>\n | 5.12.2 Test Ua1 \u2013 Tensile 5.12.3 Test Ub \u2013 Bending 5.12.4 Test Uc \u2013 Torsion 5.12.5 Test Ud \u2013 Torque 5.12.6 Test Ue \u2013 Robustness of terminations of SMD-components mounted on PCB Table 2 \u2013 Force for tensile stress on terminations Table 3 \u2013 Torque <\/td>\n<\/tr>\n | ||||||
| 24<\/td>\n | 5.13 Vibration 5.13.1 Test conditions 5.13.2 Requirements 5.14 Shock 5.14.1 Test conditions Table 4 \u2013 Acceleration Table 5 \u2013 Sweep cycles <\/td>\n<\/tr>\n | ||||||
| 25<\/td>\n | 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 \u2013 Preferred severities <\/td>\n<\/tr>\n | ||||||
| 26<\/td>\n | 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 <\/td>\n<\/tr>\n | ||||||
| 27<\/td>\n | 5.20 Damp heat, steady state 5.21 Passive flammability (optional) 5.22 Glow wire (optional) Table 7 \u2013 Severities and requirements for passive flammability <\/td>\n<\/tr>\n | ||||||
| 28<\/td>\n | 5.23 Ball pressure (optional) 5.24 Component solvent resistance 5.25 Solvent resistance of marking <\/td>\n<\/tr>\n | ||||||
| 29<\/td>\n | Annex A (normative)Sampling plan <\/td>\n<\/tr>\n | ||||||
| 30<\/td>\n | Annex B (normative)Test schedule <\/td>\n<\/tr>\n | ||||||
| 33<\/td>\n | Annex C (normative)Declaration of design <\/td>\n<\/tr>\n | ||||||
| 34<\/td>\n | Annex D (normative)Clearance Table D.1 \u2013 Clearance distances <\/td>\n<\/tr>\n | ||||||
| 35<\/td>\n | Annex E (normative)Creepage <\/td>\n<\/tr>\n | ||||||
| 36<\/td>\n | Table E.1 \u2013 Creepage distances <\/td>\n<\/tr>\n | ||||||
| 37<\/td>\n | Annex F (normative)Fully insulated winding wires Table F.1 \u2013 FIW wires with their minimum test voltages <\/td>\n<\/tr>\n | ||||||
| 38<\/td>\n | Annex X (informative)Cross-references for references to the previous edition of this document Table X.1 \u2013 Cross-references <\/td>\n<\/tr>\n | ||||||
| 40<\/td>\n | Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Fixed inductors for electromagnetic interference suppression – Sectional specification on power line chokes<\/b><\/p>\n |