1、 IEC 60079-0Edition 5.0 2007-10INTERNATIONAL STANDARD NORME INTERNATIONALEExplosive atmospheres Part 0: Equipment General requirements Atmosphres explosives Partie 0: Matriel Exigences gnrales IEC60079-0:2007 Copyright International Electrotechnical Commission Provided by IHS under license with IECN
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17、 permitted without license from IHS-,-,- IEC 60079-0Edition 5.0 2007-10INTERNATIONAL STANDARD NORME INTERNATIONALEExplosive atmospheres Part 0: Equipment General requirements Atmosphres explosives Partie 0: Matriel Exigences gnrales INTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION ELECTROTECHNIQ
18、UE INTERNATIONALE XDICS 29.260.20 PRICE CODECODE PRIXISBN 2-8318-9326-7Copyright International Electrotechnical Commission Provided by IHS under license with IECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- 2 60079-0 IEC:2007 CONTENTS FOREWORD.8 1 Scope.10 2 Nor
19、mative references .11 3 Terms and definitions .14 4 Equipment grouping .24 4.1 Group I.24 4.2 Group II.24 4.3 Group III.25 4.4 Equipment for a particular explosive atmosphere.25 5 Temperatures .25 5.1 Environmental influences .25 5.1.1 Ambient temperature .25 5.1.2 External source of heating or cool
20、ing.25 5.2 Service temperature .26 5.3 Maximum surface temperature .26 5.3.1 Determination of maximum surface temperature .26 5.3.2 Limitation of maximum surface temperature.26 5.3.3 Small component temperature for Group I or Group II electrical equipment .27 6 Requirements for all electrical equipm
21、ent .28 6.1 General .28 6.2 Mechanical strength of equipment .29 6.3 Opening times .29 6.4 Circulating currents .29 6.5 Gasket retention.30 6.6 Electromagnetic and ultrasonic energy radiating equipment .30 6.6.1 Radio frequency sources .30 6.6.2 Lasers or other continuous wave sources .31 6.6.3 Ultr
22、asonic sources.31 7 Non-metallic enclosures and non-metallic parts of enclosures .31 7.1 General .31 7.1.1 Applicability.31 7.1.2 Specification of materials.31 7.1.3 Plastic materials .32 7.1.4 Elastomeric materials .32 7.2 Thermal endurance .32 7.2.1 Tests for thermal endurance .32 7.2.2 Material s
23、election .32 7.3 Resistance to light.33 7.4 Electrostatic charges on external non-metallic materials.33 7.4.1 Applicability.33 7.4.2 Avoidance of a build-up of electrostatic charge on Group I or Group II electrical equipment .33 7.4.3 Avoidance of a build-up of electrostatic charge on equipment for
24、Group III.35 7.5 Threaded holes .35 Copyright International Electrotechnical Commission Provided by IHS under license with IECNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-60079-0 IEC:2007 3 8 Metallic enclosures and metallic parts of enclosures.35 8.1 Material c
25、omposition .35 8.1.1 Group I .35 8.1.2 Group II.35 8.1.3 Group III.36 8.2 Threaded holes .36 9 Fasteners .36 9.1 General .36 9.2 Special fasteners.36 9.3 Holes for special fasteners .37 9.3.1 Thread engagement .37 9.3.2 Tolerance and clearance .37 9.3.3 Hexagon socket set screws .38 10 Interlocking
26、devices.38 11 Bushings .38 12 Materials used for cementing.38 13 Ex components.39 13.1 General .39 13.2 Mounting .39 13.3 Internal mounting .39 13.4 External mounting .39 14 Connection facilities and termination compartments .39 14.1 General .39 14.2 Termination compartment.39 14.3 Type of protection .40 14.4 Creepage and clearance .40 15 Connection facilities for earthing or bonding conductors .40 15.1 Equipment requiring earthing.40 15.1.1 Internal.40 15.1.2 External.40 15.2 Equipment not requiring earthing.40 15.3 Size of conductor connection.40 15.4 Protection against corrosion .
