Endress+Hauser promag 30 Ex-Dokumentation Zu Den Betriebsanleitungen Seite 13

XA 014D/06/a3/09.99
No. 50094459
CV 5.0
promag 30
Ex documentation
for the operating manuals BA 008D and BA 039D
according to Directive 94/9/EC (ATEX)
Instrument groups
applies to instruments used in underground mining operations, as well as
I 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
II
endangered by a potentially explosive
Instrument category
Instruments of this category are for use in areas where ignitable
1G 1D 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
(0) (20)
time or else frequently.
Instruments of this category are for use in areas where ignitable
2G 2D
atmospheres caused by a mixture of air and gases, vapours or mists
or by dust/air mixtures, can exist some of the time.
(1) (21)
Instruments of this category are for use in areas where ignitable
atmospheres caused by a mixture of air and gases, vapours or mists
3G 3D
or by dust/air mixtures, are not likely to exist. However, if they do
(2) (22)
occur then in all probability, only seldom or for short periods of time.
(The figures in brackets refer to IEC)
Built according to European norm = E
Explosion protected electrical equipment = Ex
Type of protection
EN
nA non-sparking apparatus
nR restricted breathing
nL low energy apparatus
nP
apparatus with simple pressurised
encapsulation
Explosion groups
Gases and vapours
(examples)
- 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
Ignition temperature
Maximum surface temperature
450 °C
300 °C
200 °C
135 °C
100 °C
85 °C
Endress
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as an example: acc. EN 50021
atmosphere.
Definition
EN
nC sparking apparatus in which the contacts are protected
appropriately but not, however, through restricted
breathing, low energy or pressurised encapsulation
Minimum
EN
ignition
energy [mJ]
-- IIA
0.18
IIA
0.06
IIB
0.02
IIC
EN
842 °F T1
572 °F T2
392 °F T3
275 °F T4
212 °F T5
185 °F T6
+
Hauser
en
II 3G E Ex nC IIB T4