prowirl 70
Ex documentation
for the operating manual BA 018
according to Directive 94/9/EC (ATEX) and
Certificates of Conformity according to Directive 76/117 EWG
Hauser
+
Endress
The Power of Know How
XA 019D/06/a3/09.00
Nr. 50097526
CV 5.0
en
applies to instruments used in underground mining operations, as well as
their above ground operations, which can be endangered by mine gas
and/or flammable dusts.
applies to instruments used in the remaining areas which can be
endangered by a potentially explosive atmosphere.
Instrument groups
Directiv
e 94/9/EC (A
TEX)
I
II
Instrument category
Built according to European norm = E
Explosion protected electrical equipment = Ex
Ex protection labelling in square brackets refers to “Associated electrical equipment”
Type of protection
Explosion groups
- Ammonia
- Acetone, aircraft fuel, benzene, crude oil,
diesel oil, ethane, ethanoic acid, ether, gasolines,
heating oil, hexane, methane, propane
- Ethylene, isoprene, town gas
- Acetylene, carbon disulphide, hydrogen
--
0.18
0.06
0.02
IIA
IIA
IIB
IIC
Gases and vapours
(examples)
Minimum
ignition
energy [mJ]
IEC
EN
450 °C
300 °C
200 °C
135 °C
100 °C
85 °C
842 °F
572 °F
392 °F
275 °F
212 °F
185 °F
T1
T2
T3
T4
T5
T6
Maximum surface temperature
IEC / EN
Ignition temperature
Instruments of this category are for use in areas where ignitable
atmospheres caused by a mixture of air and gases, vapours or mists
or by dust/air mixtures, can exist all of the time or for long periods of
time or else frequently.
Instruments of this category are for use in areas where ignitable
atmospheres caused by a mixture of air and gases, vapours or mists
or by dust/air mixtures, can exist some of the time.
Instruments of this category are for use in areas where ignitable
atmospheres caused by a mixture of air and gases, vapours or mists
or by dust/air mixtures, are not likely to exist. However, if they do
occur then in all probability, only seldom or for short periods of time.
Labelling
with gases
Labelling
with dusts
1G
3G
1D
3D
2G
2D
Definition
(0)
(20)
(1)
(21)
(2)
(22)
(The figures in brackets refer to IEC)
Oil encapsulated
Purged
Sand encapsulated
Explosion proof
Increased safety
Intrinsically safety (ia, ib)
Non-flammable equipment
Cast encapsulated
Special protection
o
p
q
d
e
i
n
m
s
II 2G E Ex ia IIC T6
as an example:
EN 50014ff
