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Unit classified
in EX-classification
3G/D
2G/D
3G
3D
2G
2D
2.6
Explosion protection
The EX classification of the unit is indicated on a
separate plate, situated on the unit.
Example of ATEX classification:
CE-marking
explosion-proof operating
material
II
device group / application
2
device category
G
EX atmosphere
IIB
explosion group
c
type of protection
Temperature class - gas-
es
T4
(for dust only the temper-
ature in °C is stated)
5.52.692.01.01.04
No use
in EX-zone
0,20,1,21
0,20
0,20,1,21,22
0,20,1,21,2
0,20,21,22
0,20,1,2
II
2
I
II
1
2
3
G
D
IIA
IIB
IIC
c
k
T1
T2
T3
T4
T5
T6
Illustration 1
G
IIB
European Union
danger of mine damp
other areas prone to explosion
Use in zone 0
Use in zone 1
Use in zone 2
....caused by gas, steam, fog
...caused by dust
limit gap widths (MESG) > 0,9 mm
limit gap widths (MESG) 0,9 >= 0,5 mm
limit gap widths (MESG) < 0,5 mm
construction safety
encapsulation of liquids
limit temperature 450 °C
limit temperature 300 °C
limit temperature 200 °C
limit temperature 135 °C
limit temperature 100 °C
limit temperature 85 °C
c
T4
7
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