BS EN IEC 60939-3:2024

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Passive filter units for electromagnetic interference suppression – Passive filter units for which safety tests are appropriate

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BSI	2024	86

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Description

IEC 60939-3:2024 is available as IEC 60939-3:2024 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 60939-3:2024 covers passive filters used to attenuate unwanted radio-frequency signals (such as noise or interference) generated from electromagnetic sources. Both single and multi-channel filters within one enclosure or which are built on a printed circuit board forming a compact entity are included within the scope of this document. This document applies to passive filter units for electromagnetic interference suppression for which safety tests are appropriate. This implies that filters specified according to this document will either be connected to mains supplies, when compliance with the mandatory tests of Table B.1 is necessary, or used in other circuit positions where the equipment specification specifies that some or all of these safety tests are required. This document applies to passive filter units, which will be connected to an AC mains or other supply (DC or AC) with a nominal voltage not exceeding 1 000 V AC, with a nominal frequency not exceeding 400 Hz, or 1 500 V DC. Note: For AC use, IEC 60384-14 applies to capacitors which will be connected to AC mains with a nominal frequency not exceeding 100 Hz. This document covers appliance filters (US) but does not cover facility filters, cord-connected filters or direct plug-in filters. These other filters will be covered by another sectional specification. This edition includes the following significant technical changes with respect to the previous edition: a) separated clauses for safety and performance tests; b) added note for use of multiple X capacitors bridging basic insulation in 3 phase filters; c) characteristics and conditions to substitute X and Y capacitors are now described in a separate Subclause 4.1; d) creepage and clearance tables updated and in line with the latest editions of IEC 60938-2 and IEC 60664-1; e) allowing voltage measurement for inductance measurements (7.3); f) added requirements for marking depending on remaining energy after disconnection; g) added content of CTL DSH 2044:2016 for temperature test of IEC filters; h) added note about temperature rise required specimens for safety testing; i) changed index of capacitors in Annex A to avoid confusion between index name and capacitor class; j) moved tests from group 1A to 2. Now, samples in group 1A need to be submitted without potting; k) revision of all parts of the document has taken place based on the ISO/IEC Directives, Part 2:2021, and harmonization with other similar kinds of documents. Annex X contains all cross-references of changes in clause/subclause numbers.

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PDF Pages	PDF Title
2	undefined
5	Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
7	English CONTENTS
13	FOREWORD
15	1 Scope 2 Normative references
17	3 Terms and definitions
20	Figures Figure 1 – Asymmetrical and symmetrical test circuit
21	4 General requirements 4.1 Classification and usage of class X and Y capacitors 4.1.1 General 4.1.2 Class X capacitors 4.1.3 Class Y capacitors Tables Table 1 – Classification of Class X capacitors
22	4.2 Information to be given in a detail specification 4.2.1 General Table 2 – Classification of Class Y capacitors
23	4.2.2 Outline drawing and dimensions 4.2.3 Mounting 4.2.4 Ratings and characteristics
24	4.3 Marking 4.3.1 General 4.3.2 Coding 4.3.3 Marking details 4.3.4 Marking of filters 4.3.5 Marking of packaging 4.3.6 Additional marking
25	4.4 Components 4.5 Overcurrent protective devices 4.6 Wiring and Insulation 4.6.1 General 4.6.2 Sleeving, tubing and wire insulation 4.6.3 Properties of insulation material
26	4.7 Protective Bonding Conductors 4.8 Corrosion 5 Preferred ratings and characteristics 5.1 Preferred characteristics 5.1.1 General 5.1.2 Preferred climatic categories
27	5.2 Preferred values of ratings 5.2.1 Rated voltage (UR) 5.2.2 Rated temperature 5.2.3 Passive flammability 6 Test plan for safety tests 6.1 Structurally similar filters
28	6.2 Safety approval procedure 6.2.1 General 6.2.2 Sampling 6.2.3 Tests
29	6.3 Requalification tests 7 Test and measurement procedures 7.1 Measurement conditions 7.1.1 General 7.1.2 Standard atmospheric conditions for testing
30	7.1.3 Recovery conditions 7.1.4 Referee conditions 7.1.5 Reference conditions 7.1.6 Drying Table 3 – Standard atmospheric conditions
31	7.2 Visual examination and check of dimensions 7.2.1 Visual examination 7.2.2 Dimensions (gauging) 7.2.3 Dimensions (detail) 7.2.4 Creepage distances and clearances
33	Table 4 – Creepage distances Table 5 – Clearance
34	7.3 Inductance measurement 7.3.1 General 7.3.2 Measuring conditions 7.4 Earth inductors incorporated in filters 7.5 Capacitance 7.5.1 General 7.5.2 Measuring conditions
35	7.6 Insertion loss 7.7 Insulation resistance 7.7.1 General 7.7.2 Measuring voltage
36	7.7.3 Application of measuring voltage Table 6 – DC voltage for insulation resistance
37	7.7.4 Mean time to measuring 7.7.5 Temperature correction factor 7.7.6 Information to be given in a detail specification
38	Figure 2 – Examples for the application of Tests A and B of Table 7 Table 7 – Measuring points
39	7.7.7 Requirements Figure 3 – Examples for the application of Test C of Table 7 Table 8 – Insulation resistance – Safety tests only
40	7.8 Voltage proof 7.8.1 General 7.8.2 Test procedure 7.8.3 Applied voltage Table 9 – Insulation resistance – Safety and performance tests
41	7.8.4 Tests Table 10 – Voltage proof (filter connected to mains) Table 11 – Voltage proof (filter not connected to mains; e.g. DC filters)
42	7.8.5 Requirements 7.8.6 Repetition of the voltage proof test 7.8.7 Information to be given in a detail specification 7.8.8 Requirements 7.9 DC line resistance or voltage drop at rated current 7.9.1 General
43	7.9.2 DC line resistance 7.9.3 Voltage drop at rated current 7.10 Discharge resistance 7.10.1 General 7.10.2 Resistor Test
44	7.11 Capacitor discharge 7.11.1 General 7.11.2 Discharge measurement 7.12 Robustness of terminations 7.12.1 General 7.12.2 Test Ua1 – Tensile
45	7.12.3 Test Ub – Bending 7.12.4 Test Uc – Torsion 7.12.5 Test Ud – Torque Table 12 – Force for wire terminations Table 13 – Torque
46	7.12.6 Visual examination 7.13 Resistance to soldering heat 7.13.1 Applicability of the test 7.13.2 Pre-measurement 7.13.3 Test conditions
47	7.13.4 Test severity 7.13.5 Intermediate inspection, measurements and requirements 7.14 Climatic sequence 7.14.1 General 7.14.2 Initial measurements 7.14.3 Dry heat 7.14.4 Damp heat, cyclic
48	7.14.5 Cold 7.14.6 Low air pressure 7.14.7 Damp heat, cyclic, remaining cycles 7.14.8 Final inspection, measurements and requirements Table 14 – Number of cycles
49	7.15 Damp heat, steady state 7.15.1 Pre-measurements 7.15.2 Test method 7.15.3 Test conditions 7.15.4 Final inspection, measurements and requirements 7.16 Temperature rise 7.16.1 General
50	7.16.2 Test method 7.16.3 Test description
51	7.16.4 Requirements
52	7.17 Current overload 7.17.1 Pre-measurements 7.17.2 Test method Table 15 – Maximum temperatures
53	7.17.3 Final inspection, measurements and requirements 7.18 Leakage current 7.19 Protective conductor resistance 7.20 Impulse voltage 7.20.1 General 7.20.2 Initial measurements 7.20.3 Test conditions
54	7.20.4 Requirements 7.21 Endurance 7.21.1 General 7.21.2 General test conditions Figure 4 – Impulse wave form
55	7.21.3 Test conditions – current test 7.21.4 Test conditions – voltage test, terminations/case
56	7.21.5 Test conditions – voltage test between terminations 7.21.6 Test conditions – combined voltage/current tests 7.21.7 Final inspection, measurements and requirements
57	7.22 Passive flammability 7.22.1 General 7.22.2 Test method Table 16 – Categories of flammability
58	7.23 Active flammability 7.24 Solvent resistance of the marking 7.24.1 General 7.24.2 Test description 7.24.3 Requirements after test 8 Optional tests (for performance only) 8.1 Solderability 8.1.1 General 8.1.2 Test method 8.1.3 Test conditions
59	8.1.4 Requirements 8.1.5 Final measurements and requirements 8.2 Rapid change of temperature 8.2.1 Pre-measurements 8.2.2 Test method
60	8.2.3 Final inspection 8.3 Vibration 8.3.1 Pre-measurements 8.3.2 Test method 8.3.3 Test conditions 8.3.4 Intermediate inspection 8.3.5 Final Inspection 8.4 Shock 8.4.1 Pre-measurements 8.4.2 Test method 8.4.3 Test conditions
61	8.4.4 Final Inspection 8.5 Container sealing 8.5.1 General 8.5.2 Test conditions 8.5.3 Requirements 8.6 Charge and discharge 8.6.1 General 8.6.2 Test circuits and wave forms Figure 5 – Relay circuit Table 17 – Preferred severity
62	Figure 6 – Thyristor circuit
63	8.6.3 Information given in detail specification 8.6.4 Initial measurements Figure 7 – Voltage and current waveforms
64	8.6.5 Test conditions 8.6.6 Final measurements and requirements 8.7 Component solvent resistance 8.7.1 General 8.7.2 Initial measurements Table 18 – Measurements and requirements after charge and discharge
65	8.7.3 Test description 8.7.4 Final measurements
66	Annexes Annex A (informative) Calculation of leakage current Figure A.1 – Leakage current for 1-line filters
67	Figure A.2 – Leakage current for 2-line filters
68	Figure A.3 – Leakage current for 3-line filters
69	Figure A.4 – Leakage current for 4-line filters
70	Annex B (normative) Sampling plan for safety requirements only Table B.1 – Tests concerning safety requirements only
71	Table B.2 – Lot-by-lot test – Safety tests only approval
72	Annex C (normative) Test schedule for safety requirements only Table C.1 – Test schedule for safety requirements only
75	Annex D (normative) Circuit for the impulse voltage test Figure D.1 – Impulse voltage test circuit Table D.1 – Values of CX, CT, RP, RS, CP
76	Table D.2 – Values and tolerances of Cx, tr, td
77	Annex E (normative) Circuit for the endurance test Figure E.1 – Endurance test circuit
78	Annex F (normative) Declaration of design
79	Annex G (informative) Safety and performance tests qualification approval – Assessment level DZ Table G.1 – Sampling plan – Assessment level DZ
81	Annex X (informative) Cross reference for references to the previous edition of this document Table X.1 – Reference to IEC 60939-3 for clause/subclause or annex
83	Table X.2 – Reference to IEC 60939-3 for Figures/Tables
84	Bibliography

Additional information

Status	Definitive
Pages	86
Publication Date	2024-03-26
ISBN	978 0 539 16763 4
Standard Number	BS EN IEC 60939-3:2024
Title	Passive filter units for electromagnetic interference suppression – Passive filter units for which safety tests are appropriate
Identical National Standard Of	EN 60939-3 Ed.2.0, IEC 60939-3 Ed.2.0
Replaces	BS EN 60939-3:2015
Descriptors	Temperature, Environmental testing, Electronic equipment and components, Dimensions, Interference suppression, Electric filters, Testing conditions, Approval testing, Flammability, Suppressors, Passive filters, Electromagnetic fields, Test equipment, Marking, Seating, Visual inspection (testing), Specification (approval), Rated voltage, Voltage, Inspection, Circuits, Electrical testing
Publisher	BSI
Committee	W/-
ICS Codes	31.160 - Electric filters

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