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Bosch Rexroth AG
Explosion protection for MSK motors
4.6
Labeling
4.6.1
Designation acc. to ATEX
Code
Meaning
Ex symbol
II
Equipment group II which is suitable for all potentially explosive areas other than firedamp-endangered exca‐
vations
3
Equipment category 3, i.e. equipment in this category is intended for use in areas in which an explosive atmos‐
phere is unlikely to occur due to gases, vapors, mists or dust/air mixtures, but if it does occur, it is likely to
occur only rarely and for a short period of time.
G
G = gas
D
D = dust
Ex
The European standard for explosion protection has been applied.
nA
Ignition protection type nA for EPL Gc
tc
Protection by housing for EPL Dc
T 155 °C
Maximum surface temperature inside and outside the housing, where explosive gas or dust can occur.
IIIC
Electric devices of group IIIC are intended for use in areas where an explosive dust atmosphere ("C": conduc‐
tive dust) must be expected, excerpt areas susceptible to fire damp.
Gc
Device protection level (EPL) classification Gc for advanced safety level for use in potentially gas explosive
atmospheres where there is no ignition risk during normal operation or have any additional safety measures
which ensure in the event of foreseeable faults/malfunctions no ignition risk exists.
Dc
Device protection level (EPL) classification Dc for advanced safety level for use in potentially flammable at‐
mospheres where there is no ignition risk during normal operation or have any additional safety measures
which ensure in the event of foreseeable faults/malfunctions no ignition risk exists.
IP6X
Protection class acc. to EN 60034-5
X
For designation "Special Conditions" see notes about test number
4.6.2
UL marking for USA and Canada
Synchronous Servomotors MSK For Potentially Explosive Areas
The type plate contains details about the classification of the motors accord‐
ing to the ATEX directive 94/9/EC. The marking is differentiated for atmos‐
pheres with combustible gas and combustible dust:
II 3G Ex nA T155°C Gc X (gas).
II 3D Ex tc IIIC T155°C Dc IP6X X (dust).
Before installing the motor, make sure that it is marked according‐
ly and has a sufficiently high protection class for your application.
Explosion protection labeling and meaning
UL marking according to UL1004 and CSA 22.2, No. 100.
DOK-MOTOR*-MSK*EXGIIK3-PR09-EN-P
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