The document discusses explosive atmospheres and equipment used in hazardous locations. It defines zones based on the likelihood and duration of an explosive gas or dust atmosphere. Zone 0/1/2 are for gas/vapor/mist while Zone 20/21/22 are for combustible dusts. Equipment is categorized based on the zone and certified according to EU regulations. Luminaires are provided as examples and their labels are explained according to the zone, category, type of protection, temperature class and standards.

1. Prof. Dr.-Ing. habil. Bruno Weis
Adolf Schuch GmbH, Worms
Technical University, Berlin
● Zones
● Equipment-groups
● Categories
EU-regulation (ATEX)

2. Gases, vapours and mists
● Zone 0
● Zone 1
● Zone 2

3. Zone 0
A place in which an explosive
atmosphere …..
is present continuously or for
long periods or frequently.

4. Zone 1
A place in which an explosive
atmosphere …..
is likely to occur in normal
operation occasionally.

5. Zone 2
A place in which an explosive
atmosphere …..
is not likely to occur in normal
operation but, if it does occur,
will persist for a short period
only.

6. Zone 0 / 1 / 2

7. Zone 0 / 1 / 2

8. Combustible dusts
● Zone 20
● Zone 21
● Zone 22

9. Zone 20
A place in which an explosive
atmosphere …..
is present continuously, or for
long periods or frequently.

10. Zone 21
A place in which an explosive
atmosphere …..
is likely to occur in normal
operation occasionally.

11. Zone 22
A place in which an explosive
atmosphere …..
is not likely to occur in normal
operation but, if it does occur, will
persist for a short period only.

12. Equipment-group
… intended for use in underground parts of
mines … endangered by firedamp and for
combustible dust.
Equipment-group II
… intended for use in areas in which explosive
atmospheres are caused by mixtures of air and
gases, vapours or mists or by air/dust.
Equipment-group I

13. Combustible atmosphere
G = Gas
D = Dust

14. Categories
Category 1 G - Zone 0
Category 1 D - Zone 20
Category 2 G - Zone 1
Category 2 D - Zone 21
Category 3 G - Zone 2
Category 3 D - Zone 22

15. Category Zone Certificate
1 G, D 0, 20
Certificate of conformity or
type test certificate with
explicit approval
2 G, D 1, 21
Certificate of conformity or
type test certificate
3 G, D 2, 22
Manufacturer certificate in
consideration of the general
requirements of the standard
94/9/EG EN 50281
Categories

16. Ex-luminaire for Zone 1/21
Labelling

17. According EU-Regulation
Equipment group II – explpsive atmosphere
(Equipment group I – gasy mines)
Category 2 (Zone 1 / Zone 21)
G = gas D = dust
max. Surface Temperature of the
luminaire (+80° C)
Labelling for Zone 1/21

18. According to European Standard
„e“ increased safety
„d“ flameproof
„q“ sand filling
Explosion group (IIA, IIB, IIC)
Temperature class (T1 – T6)
Labelling for Zone 1/21

19. Ex-luminaire for Zone 2/22
Labelling

20. According EU-Regulation
Equipment group II – explosive atmosphere
(Equipment group I – gasy mines)
Category 3 (Zone 2 / Zone 22)
G = gas D = dust
max. Surface Temperature of the
luminaire (+80° C)
Ex-luminaire for Zone 2/22

21. According to European Standard
Explosion group (IIA, IIB, IIC)
Temperature class (T1 – T6)
„nA“ non sparking
„nC“ hermetically sealed
„nR“ restricted breathin
Ex-luminaire for Zone 2/22

22. e 15242
II 2 G EEx edq T4 PTB 97 ATEX 2224
II 2 D T80° C
nD 161136 EVG
II 3 G nA II T4 TÜV 00 ATEX 1541
II 3 D T80° C
Zone 2 / 22
Zone 1 / 21 – Zone 2/22

23. T4 = 135° C
All temperatures in the luminaire
are under 135° C
Dusts
T80° C = all temperatures on the outside
surface of the luminiare are
below 80° C (where dust
deposits can exist)
Gases, vapours, mists - dusts

24. Type of protection for luminaires
Zone 1 and Zone 21
"e" increased safety
"d" flameproof
„e“ and „d“

25. e 152 …
Zone 1 – Zone 21
1 x 18 W … 2 x 58 W
II 2 G EEx edq IIC T4
II 2 D T80° C

26. 1 x 18 W … 4 x 58 W
II 2 G EEx edq IIC T4
II 2 D T80° C
Zone 1 – Zone 21
e 181/182…

27. 1 x 18 W … 4 x 58 W
Zone 1 – Zone 21
II 2 G EEx edq IIC T4
II 2 D T80° C
e 191/192…

28. II 2 G EEx de IIC T2 – T4
II 2 D T140 – 270° C
max. 600 W HSE
and 1000 W QT d 4000
Zone 1 – Zone 21

29. II 2 G EEx ed IIC T2 – T4
II 2 D T150° C
e 2691 /
nD 2691
Zone 1/21 – Zone 2/22
II 3 G EEx nAC IIC T2 – T4
II 3 D T150° C
Incandescent
lamp 25 – 100 W

30. II 2 G EEx ed IIC T3 – T4
II 2 D T145° C
e 8310Incandescent lamp 25 W – 60 W
Zone 1 – Zone 21

31. II 3 G EEx nA II T4
II 3 D T80° C (100° C with VVG)
nD 161… / 162…
Zone 2 – Zone 22
1 x 18 W … 2 x 58 W

32. nD 3084 - 86
Zone 2 – Zone 22
II 3 G E Ex nR II T2 / T3
II 3 D T130 – 170° C
400W High pressure
discharge lamps

33. Zone 2 – Zone 22
nD 7573
II 3 G EEx nR II T2 – T4
II 3 D T130 – 220° C
400W High pressure
discharge lamps