1、 IEC 61439-1 Edition 2.0 2011-08 INTERNATIONAL STANDARD NORME INTERNATIONALE Low-voltage switchgear and controlgear assemblies Part 1: General rules Ensembles dappareillage basse tension Partie 1: Rgles gnrales IEC 61439-1:2011 colour inside THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright 2011 IEC
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16、 11 Fax: +41 22 919 03 00 IEC 61439-1 Edition 2.0 2011-08 INTERNATIONAL STANDARD NORME INTERNATIONALE Low-voltage switchgear and controlgear assemblies Part 1: General rules Ensembles dappareillage basse tension Partie 1: Rgles gnrales INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECH
17、NIQUE INTERNATIONALE XG ICS 29.130.20 PRICE CODE CODE PRIX ISBN 978-2-88912-634-7 Registered trademark of the International Electrotechnical Commission Marque dpose de la Commission Electrotechnique Internationale colour inside 2 61439-1 IEC:2011 CONTENTS FOREWORD . 8 INTRODUCTION . 11 1 Scope . 12
18、2 Normative references . 12 3 Terms and definitions . 15 3.1 General terms . 15 3.2 Constructional units of ASSEMBLIES 17 3.3 External design of ASSEMBLIES . 18 3.4 Structural parts of ASSEMBLIES . 18 3.5 Conditions of installation of ASSEMBLIES . 20 3.6 Insulation characteristics . 20 3.7 Protectio
19、n against electric shock . 23 3.8 Characteristics 25 3.9 Verification 27 3.10 Manufacturer/user . 28 4 Symbols and abbreviations . 28 5 Interface characteristics . 29 5.1 General . 29 5.2 Voltage ratings 29 5.2.1 Rated voltage (U n ) (of the ASSEMBLY) 29 5.2.2 Rated operational voltage (U e ) (of a
20、circuit of an ASSEMBLY) 29 5.2.3 Rated insulation voltage (U i ) (of a circuit of an ASSEMBLY) . 29 5.2.4 Rated impulse withstand voltage (U imp ) (of the ASSEMBLY) 29 5.3 Current ratings 30 5.3.1 Rated current of the ASSEMBLY (I nA ) 30 5.3.2 Rated current of a circuit (I nc ) . 30 5.3.3 Rated peak
21、 withstand current (I pk ) 30 5.3.4 Rated short-time withstand current (I cw ) (of a circuit of an ASSEMBLY) . 30 5.3.5 Rated conditional short-circuit current of an ASSEMBLY (I cc ) . 30 5.4 Rated diversity factor (RDF) 31 5.5 Rated frequency (f n ) 31 5.6 Other characteristics . 31 6 Information .
22、 32 6.1 ASSEMBLY designation marking 32 6.2 Documentation 32 6.2.1 Information relating to the ASSEMBLY 32 6.2.2 Instructions for handling, installation, operation and maintenance . 32 6.3 Device and/or component identification . 33 7 Service conditions 33 7.1 Normal service conditions . 33 7.1.1 Am
23、bient air temperature 33 7.1.2 Humidity conditions . 33 7.1.3 Pollution degree 33 7.1.4 Altitude 34 7.2 Special service conditions . 34 7.3 Conditions during transport, storage and installation . 35 61439-1 IEC:2011 3 8 Constructional requirements . 35 8.1 Strength of materials and parts 35 8.1.1 Ge
24、neral . 35 8.1.2 Protection against corrosion 35 8.1.3 Properties of insulating materials . 35 8.1.4 Resistance to ultra-violet radiation . 36 8.1.5 Mechanical strength 36 8.1.6 Lifting provision . 36 8.2 Degree of protection provided by an ASSEMBLY enclosure 36 8.2.1 Protection against mechanical i
25、mpact 36 8.2.2 Protection against contact with live parts, ingress of solid foreign bodies and water . 36 8.2.3 ASSEMBLY with removable parts 37 8.3 Clearances and creepage distances 37 8.3.1 General . 37 8.3.2 Clearances 38 8.3.3 Creepage distances . 38 8.4 Protection against electric shock . 39 8.
26、4.1 General . 39 8.4.2 Basic protection . 39 8.4.3 Fault protection . 40 8.4.4 Protection by total insulation 42 8.4.5 Limitation of steady-state touch current and charge . 43 8.4.6 Operating and servicing conditions 43 8.5 Incorporation of switching devices and components 45 8.5.1 Fixed parts 45 8.
27、5.2 Removable parts . 45 8.5.3 Selection of switching devices and components . 46 8.5.4 Installation of switching devices and components 46 8.5.5 Accessibility 46 8.5.6 Barriers . 47 8.5.7 Direction of operation and indication of switching positions 47 8.5.8 Indicator lights and push-buttons . 47 8.
28、6 Internal electrical circuits and connections 47 8.6.1 Main circuits 47 8.6.2 Auxiliary circuits 48 8.6.3 Bare and insulated conductors 48 8.6.4 Selection and installation of non-protected live conductors to reduce the possibility of short-circuits . 49 8.6.5 Identification of the conductors of mai
29、n and auxiliary circuits . 49 8.6.6 Identification of the protective conductor (PE, PEN) and of the neutral conductor (N) of the main circuits 49 8.7 Cooling 49 8.8 Terminals for external conductors 49 9 Performance requirements . 51 9.1 Dielectric properties 51 9.1.1 General . 51 9.1.2 Power-freque
30、ncy withstand voltage . 51 9.1.3 Impulse withstand voltage . 51 4 61439-1 IEC:2011 9.1.4 Protection of surge protective devices . 51 9.2 Temperature rise limits 52 9.3 Short-circuit protection and short-circuit withstand strength . 52 9.3.1 General . 52 9.3.2 Information concerning short-circuit wit
31、hstand strength . 52 9.3.3 Relationship between peak current and short-time current . 53 9.3.4 Co-ordination of protective devices 53 9.4 Electromagnetic compatibility (EMC) . 53 10 Design verification 54 10.1 General . 54 10.2 Strength of materials and parts 55 10.2.1 General . 55 10.2.2 Resistance
32、 to corrosion . 55 10.2.3 Properties of insulating materials . 56 10.2.4 Resistance to ultra-violet (UV) radiation. 58 10.2.5 Lifting 58 10.2.6 Mechanical impact . 59 10.2.7 Marking . 59 10.3 Degree of protection of ASSEMBLIES . 59 10.4 Clearances and creepage distances 59 10.5 Protection against el
33、ectric shock and integrity of protective circuits . 60 10.5.1 Effectiveness of the protective circuit. 60 10.5.2 Effective earth continuity between the exposed conductive parts of the ASSEMBLY and the protective circuit 60 10.5.3 Short-circuit withstand strength of the protective circuit . 60 10.6 I
34、ncorporation of switching devices and components 61 10.6.1 General . 61 10.6.2 Electromagnetic compatibility 61 10.7 Internal electrical circuits and connections 61 10.8 Terminals for external conductors 61 10.9 Dielectric properties 61 10.9.1 General . 61 10.9.2 Power-frequency withstand voltage .
35、61 10.9.3 Impulse withstand voltage . 62 10.9.4 Testing of enclosures made of insulating material 64 10.9.5 External operating handles of insulating material . 64 10.10 Verification of temperature rise 64 10.10.1 General . 64 10.10.2 Verification by testing 64 10.10.3 Derivation of ratings for simil
36、ar variants . 70 10.10.4 Verification assessment . 71 10.11 Short-circuit withstand strength . 74 10.11.1 General . 74 10.11.2 Circuits of ASSEMBLIES which are exempted from the verification of the short-circuit withstand strength 74 10.11.3 Verification by comparison with a reference design Utilisi
37、ng a check list . 75 10.11.4 Verification by comparison with a reference design Utilising calculation . 75 10.11.5 Verification by test . 75 61439-1 IEC:2011 5 10.12 Electromagnetic compatibility (EMC) . 80 10.13 Mechanical operation 80 11 Routine verification . 80 11.1 General . 80 11.2 Degree of p
38、rotection of enclosures 81 11.3 Clearances and creepage distances 81 11.4 Protection against electric shock and integrity of protective circuits . 81 11.5 Incorporation of built-in components 81 11.6 Internal electrical circuits and connections 81 11.7 Terminals for external conductors 81 11.8 Mecha
39、nical operation 82 11.9 Dielectric properties 82 11.10 Wiring, operational performance and function 82 Annex A (normative) Minimum and maximum cross-section of copper conductors suitable for connection to terminals for external conductors (see 8.8) . 90 Annex B (normative) Method of calculating the
40、cross-sectional area of protective conductors with regard to thermal stresses due to currents of short duration 91 Annex C (informative) User information template . 92 Annex D (informative) Design verification 96 Annex E (informative) Rated diversity factor 97 Annex F (normative) Measurement of clea
41、rances and creepage distances 106 Annex G (normative) Correlation between the nominal voltage of the supply system and the rated impulse withstand voltage of the equipment 111 Annex H (informative) Operating current and power loss of copper conductors 113 Annex I (Void) . 115 Annex J (normative) Ele
42、ctromagnetic compatibility (EMC) 116 Annex K (normative) Protection by electrical separation. 123 Annex L (informative) Clearances and creepage distances for North American region . 126 Annex M (informative) North American temperature rise limits . 127 Annex N (normative) Operating current and power
43、 loss of bare copper bars 128 Annex O (informative) Guidance on temperature rise verification . 130 Annex P (normative) Verification of the short-circuit withstand strength of busbar structures by comparison with a tested reference design by calculation 135 Bibliography 139 Figure E.1 Typical ASSEMB
44、LY 98 Figure E.2 Example 1: Table E.1 Functional unit loading for an ASSEMBLY with a rated diversity factor of 0,8 . 100 Figure E.3 Example 2: Table E.1 Functional unit loading for an ASSEMBLY with a rated diversity factor of 0,8 . 101 Figure E.4 Example 3: Table E.1 Functional unit loading for an A
45、SSEMBLY with a rated diversity factor of 0,8 . 102 Figure E.5 Example 4: Table E.1 Functional unit loading for an ASSEMBLY with a rated diversity factor of 0,8 . 103 Figure E.6 Example of average heating effect calculation 104 Figure E.7 Example graph for the relation between the equivalent RDF and
46、the parameters at intermittent duty at t 1= 0,5 s, I 1= 7*I 2at different cycle times 105 6 61439-1 IEC:2011 Figure E.8 Example graph for the relation between the equivalent RDF and the parameters at intermittent duty at I 1= I 2(no starting overcurrent) 105 Figure F.1 Measurement of ribs . 110 Figu
47、re J.1 Examples of ports . 116 Figure O.1 Temperature rise verification methods 134 Figure P.1 Tested busbar structure (TS) 135 Figure P.2 Non tested busbar structure (NTS) 136 Figure P.3 Angular busbar configuration with supports at the corners 138 Table 1 Minimum clearances in air a(8.3.2) . 82 Ta
48、ble 2 Minimum creepage distances (8.3.3) . 83 Table 3 Cross-sectional area of a copper protective conductor (8.4.3.2.2) . 83 Table 4 Conductor selection and installation requirements (8.6.4) 84 Table 5 Minimum terminal capacity for copper protective conductors (PE, PEN) (8.8) 84 Table 6 Temperature-
49、rise limits (9.2) . 85 Table 7 Values for the factor n a(9.3.3) . 86 Table 8 Power-frequency withstand voltage for main circuits (10.9.2) 86 Table 9 Power-frequency withstand voltage for auxiliary and control circuits (10.9.2) . 86 Table 10 Impulse withstand test voltages (10.9.3) 87 Table 11 Copper test conductors for rated currents up to 400 A inclusive (10.10.2.3.2) . 87 Table 12 Copper te
