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21/30445647 DC BS EN 60079-0. Explosive atmospheres - Part 0. Equipment. General requirements, 2021
- 31_1597e_CD (1).pdf [Go to Page]
- CONTENTS
- FOREWORD
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Equipment grouping [Go to Page]
- 4.1 General
- 4.2 Group I
- 4.3 Group II
- 4.4 Group III
- 4.5 Equipment for a particular explosive gas atmosphere
- 5 Temperatures [Go to Page]
- 5.1 Environmental influences [Go to Page]
- 5.1.1 Ambient temperature
- 5.1.2 External source of heating or cooling
- 5.2 Service temperature, TS
- 1.1
- 5.3 Maximum surface temperature [Go to Page]
- 5.3.1 Determination of maximum surface temperature
- 5.3.2 Limitation of maximum surface temperature [Go to Page]
- 5.3.2.1 Group I equipment
- 5.3.2.2 Group II equipment
- 5.3.2.3 Group III equipment [Go to Page]
- 5.3.2.3.1 Maximum surface temperature for EPL Da
- 5.3.2.3.2 Maximum surface temperature for EPL Db
- 5.3.2.3.3 Maximum surface temperature determined without a layer of dust for EPL Dc
- 5.3.3 Small component temperature for Group I or Group II electrical equipment
- 5.3.4 Component temperature of smooth surfaces for Group I or Group II equipment
- 6 Requirements for all equipment [Go to Page]
- 6.1 General
- 6.2 Mechanical strength of equipment
- 6.3 Opening times
- 6.4 Circulating currents in enclosures (e.g. of large electric machines)
- 6.5 Gasket retention
- 6.6 Electromagnetic and ultrasonic energy radiating equipment [Go to Page]
- 6.6.1 General
- 6.6.2 Radio frequency sources
- 6.6.3 Ultrasonic sources
- 6.6.4 Optical radiation sources
- 7 Non-metallic enclosures and non-metallic parts of enclosures [Go to Page]
- 7.1 General [Go to Page]
- 7.1.1 Applicability
- 7.1.2 Specification of materials [Go to Page]
- 7.1.2.1 General
- 7.1.2.2 Plastic materials
- 7.1.2.3 Elastomers
- 7.1.2.4 Materials used for cementing
- 7.2 Thermal endurance [Go to Page]
- 7.2.1 Tests for thermal endurance
- 7.2.2 Material selection
- 7.2.3 Alternative qualification of elastomeric sealing O-rings
- 7.3 Resistance to ultraviolet light
- 7.4 Electrostatic charges on external non-metallic materials [Go to Page]
- 7.4.1 Applicability
- 7.4.2 Avoidance of a build-up of electrostatic charge for Group I or Group II
- 7.4.3 Avoidance of a build-up of electrostatic charge for Group III
- 7.5 Attached external conductive parts
- 8 Metallic enclosures and metallic parts of enclosures [Go to Page]
- 8.1 Material composition
- 8.2 Group I
- 8.3 Group II
- 8.4 Group III
- 8.5 Copper Alloys
- 9 Fasteners [Go to Page]
- 9.1 General fasteners
- 9.2 Special fasteners
- 9.3 Holes for special fasteners [Go to Page]
- 9.3.1 Thread engagement
- 9.3.2 Tolerance and clearance
- 9.4 Hexagon socket set screws
- 10 Interlocking devices
- 11 Bushings
- 12 (Reserved for future use)
- 13 Ex Components [Go to Page]
- 13.1 General
- 13.2 Mounting
- 13.3 Internal mounting
- 13.4 External mounting
- 13.5 Ex Component certificate
- 14 Connection facilities [Go to Page]
- 14.1 General
- 14.2 Type of Protection
- 14.3 Creepage and clearance
- 15 Connection facilities for earthing or bonding conductors [Go to Page]
- 15.1 Equipment requiring earthing or bonding [Go to Page]
- 15.1.1 Internal earthing
- 15.1.2 External bonding
- 15.2 Equipment not requiring earthing
- 15.3 Size of protective earthing conductor connection
- 15.4 Size of equipotential bonding conductor connection
- 15.5 Protection against corrosion
- 15.6 Secureness of electrical connections
- 15.7 Internal earth continuity plate
- 16 Entries into enclosures [Go to Page]
- 16.1 General
- 16.2 Identification of entries
- 16.3 Cable glands
- 16.4 Blanking elements
- 16.5 Thread adapters
- 16.6 Temperature at branching point and entry point
- 16.7 Electrostatic charges of cable sheaths
- 17 Supplementary requirements for electric machines [Go to Page]
- 17.1 General
- 17.2 Ventilation [Go to Page]
- 17.2.1 Ventilation openings
- 17.2.2 External fans [Go to Page]
- 17.2.2.1 External fan hood and external ventilation screens
- 17.2.2.2 Fan impellors
- 1.1.1 Fan impellors manufactured from materials containing aluminium, magnesium, titanium, or zirconium, shall comply with Clause 8.
- 17.2.3 Cooling fans of rotating electric machines [Go to Page]
- 17.2.3.1 Fans and fan hoods
- 17.2.3.2 Construction and mounting of the ventilating systems
- 17.2.3.3 Clearances for the ventilating system
- 17.2.4 Auxiliary motor cooling fans
- 17.2.5 Room ventilating fans [Go to Page]
- 17.2.5.1 Applicability
- 17.2.5.2 General
- 17.2.5.3 Fan and fan hoods
- 17.2.5.4 Construction and mounting
- 17.2.5.5 Clearances for rotating parts
- 17.3 Bearings
- 18 Supplementary requirements for switchgear [Go to Page]
- 18.1 Flammable dielectric
- 18.2 Disconnectors
- 18.3 Group I – Provisions for locking
- 18.4 Doors and covers
- 19 Supplementary requirements for factory-wiring between enclosures
- 1
- 20 Supplementary requirements for external plugs, socket outlets and connectors for field wiring connection [Go to Page]
- 20.1 General
- 20.2 Explosive gas atmospheres
- 20.3 Explosive dust atmospheres
- 20.4 Energized plugs
- 21 Supplementary requirements for luminaires [Go to Page]
- 21.1 General
- 21.2 Covers for luminaires of EPL Mb, EPL Gb, or EPL Db
- 21.3 Covers for luminaires of EPL Gc or EPL Dc
- 21.4 Sodium lamps
- 21.5 Replacement lamps
- 22 Supplementary requirements for caplights and handlights [Go to Page]
- 22.1 Group I caplights
- 22.2 Group II and Group III caplights and handlights
- 23 Equipment incorporating cells and batteries [Go to Page]
- 23.1 General
- 23.2 Interconnection of cells to form batteries
- 23.3 Cell types
- 23.4 Cells in a battery
- 23.5 Ratings of batteries
- 23.6 Interchangeability
- 23.7 Charging of primary batteries
- 23.8 Leakage
- 23.9 Connections
- 23.10 Orientation
- 23.11 Replacement of cells or batteries
- 23.12 Replaceable battery pack
- 24 Documentation [Go to Page]
- 24.1 Schedule drawings
- 24.2 Related drawings
- 25 Compliance of prototype or sample with documents
- 26 Type tests [Go to Page]
- 26.1 General
- 26.2 Test configuration
- 26.3 Tests in explosive test mixtures
- 26.4 Tests of enclosures [Go to Page]
- 26.4.1 Order of tests [Go to Page]
- 26.4.1.1 Metallic enclosures, metallic parts of enclosures and glass or ceramic parts of enclosures
- 26.4.1.2 Non-metallic enclosures or non-metallic parts of enclosures [Go to Page]
- 26.4.1.2.1 General
- 26.4.1.2.2 Group I equipment
- 26.4.1.2.3 Group II and Group III equipment
- 26.4.2 Resistance to impact
- 26.4.3 Drop test
- 26.4.4 Acceptance criteria
- 26.4.5 Degree of protection (IP) by enclosures [Go to Page]
- 26.4.5.1 Test procedure
- 26.4.5.2 Acceptance criteria
- 26.5 Thermal tests [Go to Page]
- 26.5.1 Temperature measurement [Go to Page]
- 26.5.1.1 General
- 26.5.1.2 Service temperature, TS,
- 26.5.1.3 Maximum surface temperature
- 26.5.2 Thermal shock test
- 26.5.3 Small component ignition test (Group I and Group II) [Go to Page]
- 26.5.3.1 General
- 26.5.3.2 Procedure
- 26.5.3.3 Acceptance criteria
- 26.6 Torque test for bushings [Go to Page]
- 26.6.1 Test procedure
- 26.6.2 Acceptance criteria
- 26.7 Non-metallic enclosures or non-metallic parts of enclosures [Go to Page]
- 26.7.1 General
- 26.7.2 Test temperatures
- 26.8 Thermal endurance to heat
- 26.9 Thermal endurance to cold
- 26.10 Resistance to UV light [Go to Page]
- 26.10.1 General
- 26.10.2 Light exposure
- 26.10.3 Acceptance criteria
- 26.11 Resistance to chemical agents for Group I equipment
- 26.12 Earth continuity
- 26.13 Surface resistance test of parts of enclosures of non-metallic materials
- 26.14 Measurement of capacitance [Go to Page]
- 26.14.1 General
- 26.14.2 Test procedure
- 26.15 Verification of ratings of ventilating fans
- 26.16 Alternative qualification of elastomeric sealing O-rings
- 26.17 Transferred charge test [Go to Page]
- 26.17.1 Test equipment
- 26.17.2 Test sample
- 26.17.3 Test procedure
- 27 Routine tests
- 28 Manufacturer's responsibility [Go to Page]
- 28.1 Conformity with the Schedule Drawings
- 28.2 Certificate
- 28.3 Responsibility for marking
- 29 Marking [Go to Page]
- 29.1 Applicability
- 29.2 Location
- 29.3 General
- 29.4 Ex marking for explosive gas atmospheres
- 29.5 Ex marking for explosive dust atmospheres
- 29.6 Combined types (or levels) of protection
- 29.7 Multiple types of protection
- 29.8 Ga equipment using two independent Gb types (or levels) of protection
- 29.9 Boundary wall
- 29.10 Ex Components
- 29.11 Small Ex Equipment and small Ex Components
- 29.12 Extremely small Ex Equipment and extremely small Ex Components
- 29.13 Alternative marking of Ex Equipment and Ex Components using digital technology
- 29.14 Warning markings
- 29.15 Cells and batteries
- 29.16 Electric machines supplied by a converter
- 29.17 Examples of marking1F
- 30 Instructions [Go to Page]
- 30.1 General
- 30.2 Cells and batteries
- 30.3 Electric machines
- 30.4 Ventilating fans
- 30.5 Cable glands
- Annex A (normative) Supplementary requirements for cable glands [Go to Page]
- A.1 General
- A.2 Constructional requirements [Go to Page]
- A.2.1 Cable sealing
- A.2.2 Filling compounds
- A.2.3 Clamping [Go to Page]
- A.2.3.1 General
- A.2.3.2 Group II or III cable glands
- A.2.4 Lead-in of cable [Go to Page]
- A.2.4.1 Sharp edges
- A.2.4.2 Point of entry
- A.2.5 Release by a tool
- A.2.6 Fixing
- A.2.7 Degree of protection (IP) rating
- A.3 Type tests [Go to Page]
- A.3.1 Tests of clamping of non-armoured and braided cables [Go to Page]
- A.3.1.1 Cable glands with clamping by the sealing ring
- A.3.1.2 Cable glands with clamping by filling compound
- A.3.1.3 Cable glands with clamping by means of a clamping device
- A.3.1.4 Clamping test
- A.3.1.5 Mechanical strength
- A.3.2 Tests of clamping of armoured cables [Go to Page]
- A.3.2.1 Tests of clamping where the armourings are clamped by a device integral to the gland [Go to Page]
- A.3.2.1.1 General
- A.3.2.1.2 Clamping test
- A.3.2.1.3 Mechanical strength
- A.3.2.2 Tests of clamping where the armourings are not clamped by a device integral to the gland
- A.3.3 Type test for resistance to impact
- A.3.4 Test for degree of protection (IP) rating of cable glands
- A.4 Marking [Go to Page]
- A.4.1 Marking of cable glands
- A.4.2 Identification of cable-sealing rings
- A.5 Instructions
- Annex B (normative) Requirements for Ex Components
- Annex C (informative) Example of rig for resistance to impact test
- Annex D (informative) Electric machines supplied by a converter
- Annex E (informative) Temperature evaluation of electric machines
- Annex F (informative) Guidance flowchart for tests of non-metallic enclosures or non-metallic parts of enclosures (26.4)
- Annex G (informative) Guidance flowchart for tests of cable glands
- Annex H (informative) Shaft voltages resulting in motor bearing or shaft brush sparking Discharge energy calculation [Go to Page]
- H.1 General
- H.2 Assessment of the risk of ignition using ignition energy calculation
- H.3 Shaft voltage determination for a rotating machine
- H.4 Capacitance “C” calculation for a rotating machine
- H.5 Energy “E” calculation for a rotating machine
- H.6 Assessment using reference curves
- Bibliography [Go to Page]