S&P CE ATEX Mode D'emploi page 24

Example No. 5 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)
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 range as a function of operating conditions, where Tx is the motor temperature
T135ºC-
class (in the example it would be T135ºC-T300ºC) according to table 4 for Dust
TxºC
Equipment Protection Level
Dc
In the following tables you can see the temperature classes for the fi nal equipment (gas)
or the fi nal temperature of the equipment (dust), according to the maximum temperature
of the airfl ow conveyed by the equipment.
Table 2. Direct drive products for GAS
Maximum
conveyed airfl ow
temperature
supported by the
T6 (85ºC)
equipment (ºC)
x 80
80< x 95 T6-T5
95< x 130 T6-T4
130< x 195 T6-T3
195< x 290 T6-T2
290< x 440 T6-T1
24
II 3D Ex h IIIB T135ºC-300ºC Dc
DIRECT DRIVE PRODUCTS FOR GAS
Temperature class of the fi nal equipment depending on the temperature
of the airfl ow and the temperature class of the motor
T5 (100ºC) T4 (135ºC)
T6 T5
T5
T5-T4
T5-T3
T5-T2
T5-T1
Motor temperature class
T3 (200ºC)
T4 T3
T4 T3
T4 T3
T4-T3 T3
T4-T2 T3-T2
T4-T1 T3-T1
T2 (300ºC) T1 (450ºC)
T2 T1
T2 T1
T2 T1
T2 T1
T2 T1
T2-T1 T1