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Printed in the Federal Republic of Germany
TR-Electronic GmbH 2019, All Rights Reserved
08/20/2021
TR-ECE-BA-GB-0138 v04
Page 21 of 47
4.5 Explosion protection characteristics
The conformity assessment procedure, with quality assurance of production / product
according to the ATEX directive 2014/34/EU, takes place with the participation of the
notified body:
0123, TÜV SÜD Product Service GmbH,
Gottlieb-Daimler-Strasse 7,
70794 Filderstadt
Certificate QS product ("2G
…d", "2D…t"): EX3A 18 07 34446 005
4.5.1 Ex-labeling, gas
II
2G
Ex
db
II
C
T6
…T4
Gb
EPL (IEC/CENELEC)
Temperature class (IEC/CENELEC)
Explosion group (IEC/CENELEC)
Group (IEC/CENELEC)
Ignition protection type (IEC/CENELEC)
Labeling (IEC/CENELEC)
Device category (ATEX)
Device group (ATEX)
Ex-labeling (ATEX)
Device group .........................................................
II
: on the surface applications
Device category ....................................................
2G
: Zone 1
adequate safety in case of predictable failures
Ignition protection type ........................................
db
: flameproof enclosure
no ignition of the external ex-atmosphere
Group .....................................................................
II
: potentially gas-explosive areas
Explosion group ...................................................
C
: typical gas: Hydrogen, acetylene
Temperature class ................................................
max. enclosure surface-temperature
T4 ...........................................................................
135 °C
T5 ...........................................................................
100 °C
T6 ...........................................................................
85 °C
EPL (
Device protection level
) .................................
G
“b” (Zone 1):
adequate safety in case of predictable failures