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BS EN 60079-7:2007

BS EN 60079-7:2007

$215.11

Explosive atmospheres – Equipment protection by increased safety “e”

Published By Publication Date Number of Pages
BSI 2007 86
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This part of IEC 60079 specifies the requirements for the design, construction, testing and marking of electrical apparatus with type of protection increased safety “e” intended for use in explosive gas atmospheres. This standard applies to electrical apparatus where the rated voltage does not exceed 11 kV r.m.s. a.c. or d.c. Additional measures are applied to ensure that the apparatus does not produce arcs, sparks, or excessive temperatures in normal operation or under specified abnormal conditions.

PDF Catalog

PDF Pages PDF Title
8 1 Scope
2 Normative references
10 3 Terms and definitions
13 4 Constructional requirements for all electrical apparatus
4.1 General
4.2 Electrical connections
4.2.1 General
14 4.2.2 Field wiring connections
4.2.2.1 General
4.2.2.2 Connections made using terminals complying with IEC 60947-7-1, IEC 60947 7 2, IEC 60999-1, or IEC 60999-2
15 4.2.2.3 Field wiring connection facilities integral to “e” apparatus or components
4.2.2.4 Connections designed to be used with cable lugs and similar devices
4.2.2.5 Connections using permanent arrangements
4.2.3 Factory connections
4.2.3.1 General
4.2.3.2 Field wiring connection methods used for factory connections
4.2.3.3 Permanent connections
16 4.2.3.4 Pluggable connections
4.2.3.5 Terminal bridging connections
4.3 Clearances
21 4.4 Creepage distances
22 4.5 Solid electrical insulating materials
4.6 Windings
23 4.7 Temperature limitations
4.7.1 General
24 4.7.2 Conductors
4.7.3 Insulated windings 
4.7.4 Winding protection 
25 4.8 Wiring internal to apparatus
4.9 Degrees of protection provided by enclosures
4.10 Fasteners
26 5 Supplementary requirements for specific electrical apparatus
5.1 General
5.2 Rotating electrical machines
5.2.1 Degrees of protection provided by machine enclosures
5.2.2 Internal fans
5.2.3 Minimum radial air gap
27 5.2.4 Machines with cage rotors
30 5.2.5 Winding requirements
5.2.6 Stator winding terminals
5.2.7 Stator winding insulation system
5.2.8 Bearing seals and shaft seals
5.2.8.1 Non-rubbing seals and labyrinths
31 5.2.8.2 Rubbing seals
5.3 Luminaires
5.3.1 Light source
5.3.2 Minimum distance between lamp and protective cover 
32 5.3.3 Lampholders and lamp caps
5.3.3.1 Screw lampholders and lamp caps
33 5.3.3.2 Other lampholders and lamp caps
5.3.3.3 Requirements for electrical contact between the lampholder and lamp cap
5.3.4 Surface temperature of lamps
34 5.3.5 Temperature of lamp caps 
5.3.6 Limiting temperatures
5.3.7 Luminaires for tubular fluorescent bi-pin lamps 
5.3.7.1 General
5.3.7.2 Maximum ambient temperature
5.3.7.3 Temperature class
35 5.4 Caplights and handlights
36 5.5 Measuring instruments and instrument transformers
5.6 Transformers other than instrument transformers
37 5.7 Batteries
5.7.1 Secondary batteries with capacity greater than 25 Ah
5.7.1.1 General
5.7.1.2 Battery containers
38 5.7.1.3 Cells
5.7.1.4 Connections
39 5.7.2 Primary and secondary batteries with capacity up to 25 Ah
41 5.7.3 Release of flammable gas
5.7.4 Charging of cells  
42 5.7.5 Discharge of cells
5.7.6 Incorporation of other types of protection
5.7.7 Disconnection and transportation 
43 5.8 General purpose connection and junction boxes
5.9 Resistance heaters (other than trace heaters)
45 5.10 Other electrical apparatus
6 Type verifications and type tests
6.1 Dielectric strength
46 6.2 Rotating electrical machines
6.2.3 Additional tests for machines
6.2.3.1 Stator winding insulation system
47 6.2.3.2 Cage rotor
48 6.3 Luminaires designed for mains supply
6.3.1 Mechanical tests for screw lampholders other than E10
6.3.2 Abnormal operation of luminaires with tubular fluorescent lamps
6.3.2.1 Rectification test
6.3.2.2 Inoperative lamp test
6.3.2.3 Power dissipation of cathodes of lamps supplied by electronic ballasts
49 6.3.3 Sulphur dioxide test for the connection of bi-pin lamp caps to lampholders
6.3.4 Vibration test for luminaires with bi-pin lamps
50 6.4 Measuring instruments and instrument transformers
51 6.5 Transformers other than instrument transformers
6.6 Secondary batteries
6.6.1 Application of tests
6.6.2 Insulation resistance
6.6.2.2 The insulation resistance is considered satisfactory if the measured value is equal to at least 1 M(.
6.6.3 Shock test
6.6.3.1 General
52 6.6.3.2 Test conditions
6.6.3.3 Test procedure
6.6.3.4 Acceptance criteria
6.6.4 Test for ventilation of battery container
54 6.7 General purpose connection and junction boxes
6.8 Resistance heating devices and resistance heating units
55 6.9 Terminal insulating material tests
56 7 Routine verifications and routine tests
7.1 Dielectric tests
7.2 Dielectric tests for batteries
57 7.3 Inter-turn overvoltage tests
8 Ex component certificates
8.1 General
8.2 Terminals
9 Marking and instructions
9.1 General marking
58 9.2 Instructions for use
9.2.1 Battery operated apparatus
59 9.2.2 Terminals
9.2.3 Luminaires
9.2.4 Motors
60 9.3 Warning markings

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BS EN 60079-7:2007
$215.11