2 Safety
Maschinenfabrik Reinhausen GmbH 2020
15
4983703/01 EN
VACUTAP
®
VV-Ex
Equipment groups (number 2)
I
Equipment in this category is intended for use in underground
parts of mines as well as those parts of surface installations of
such mines endangered by firedamp and/or combustible dust.
II
Equipment in this category is intended for use in other areas in
which explosive atmospheres may be present.
Table 4: Equipment groups
Equipment category / zone classification (number 3)
Designation
for gases
Designation
for dusts
Definition
1G
(0)
1D
(20)
Equipment in this category is intended for use in ar-
eas in which explosive atmospheres caused by mix-
tures of air and gases, vapors or mists or by air/dust
mixtures are present continuously, for long periods
or frequently.
2G
(1)
2D
(21)
Equipment in this category is intended for use in ar-
eas in which explosive atmospheres caused by
gases, vapors, mists or air/dust mixtures occur oc-
casionally.
3G
(2)
3D
(22)
Equipment in this category is intended for use in ar-
eas in which explosive atmospheres caused by
gases, vapors, mists, or air/dust mixtures are un-
likely to occur or, if they do occur, are likely to do so
only infrequently and for a short period only.
Table 5: Equipment category / zone classification
Ignition protection types (number 5)
d
Pressure-proof enclosure
e
Increased safety
i
Intrinsic safety (ia, ib)
m
Encapsulation
o
Liquid immersion
Protection level "ob": Equipment protection level (EPL) "Gb" for
zone 1 and zone 2
Protection level "oc": Equipment protection level (EPL) "Gc" for
zone 2
p
Pressurized apparatus
q
Powder filling
n
Ignition protection type "n"
Table 6: Ignition protection types
