1.6.3 Ex key (example)
Sira 12 ATEX 0000 X
0820
II 2G c Ex de IIC T4
Sira
Certifi cation offi ce
12 ATEX 0000 X
ATEX registration number
CE-sign
0820
Monitoring offi ce, quality assurance
Device certifi ed for Ex area
II
Device group (here: use above ground)
2G
Device category and classifi cation (G = gas; D = dust)
c
Ignition protection class (constructive safety)
Ex d
Ignition protection class (pressure-proof encapsulation)
Ex e
Ignition protection class (increased safety)
IIC
Group
T4
Temperature class
1.6.4 Marking
Designation
Marking
Device group II
Clas-
sifi ca-
tion
All areas with explosion-capable atmosphere apart from
mining, underground and above ground in cases of mien
damp
Device cate-
gory / classifi -
cation
„2G“
2
Category 2 / Zone 1 / high safety / Devices of this cat-
egory are intended for use in areas in which occasional
occurrence of an explosion-capable atmosphere of gases,
vapours, mists is to be expected. Increased safety, Ex e
„3G“
3
Category 3 / Zone 2 / normal safety / Devices of this cat-
egory are intended for use in areas in which occurrence of
an explosion-capable atmosphere of gases, vapours, mists
is not to be expected, but if it does occur then in all prob-
ability only rarely and for a short period of time.
G
Gases / Vapours / Mists
Ignition pro-
tection class
mechanical
„c“
Construc-
tive safety
EN 13463-5
Ignition pro-
tection class
electrical
„d“
Pres-
sureproof
encapsula-
tion d
Motor:
Pressure-proof encapsulation
„e“
Increased
safety, Ex e
Terminal box:
Occurrence of sparks, light arc or inadmissible tempera-
tures which could act as sources of ignition is prevented by
additional measures and an increased degree of safety.
42
