Example No. 3 for Gas (motor outside of conveyed airfl ow where the maximum surface
temperature not only depends on the equipment itself, but also on the operating conditions)
Complies with the ATEX Directive
ATEX Group Equipment for surface facilities other than mines
II
Category 2. Equipment classi ed for installation in an explosive gas atmosphere - Zone 1
2G
Indicates that the device corresponds to one or more protection modes
Ex
Explosion protection types for non-electrical devices
h
Gas explosion group
IIB
Surface temperature depending on operating conditions, according to Table 2 for Gas
T3
Equipment Protection Level
Gb
Example No. 4 for Dust (motor outside of conveyed airfl ow where the maximum surface
temperature not only depends on the equipment itself, but also on the operating conditions)
II 3D Ex h IIIB T125ºC Dc (for non-conductive dust)
II 3D Ex h IIIC T125ºC Dc (for conductive dust)
Complies with the ATEX Directive
ATEX Group Equipment for surface facilities other than mines
II
Category 3. Equipment classi ed for installation in an explosive dust atmosphere - Zone 22
3D
Indicates that the device corresponds to one or more protection modes
Ex
Types of explosion protection for non-electrical equipment
h
IIIB o IIIC Dust explosion group
Surface temperature depending on operating conditions, according to Table 4 for Dust
T125ºC
Equipment Protection Level
Dc
II 2G Ex h IIB T3 Gb
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