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MKE Synchronous Servomotors
Specific conditions
Bosch Rexroth AG
R911402016, Edition 02
T4
Maximum surface temperature 135 °C
Gb
Equipment Protection Level (EPL) Classification
Gb for equipment with "high" level of protection
for use in gas explosive atmospheres where
there is no risk of ignition during normal opera-
tion or foreseeable failures/malfunctions.
4.4
ATEX labeling for MKE
motors (dust)
Designation for use in potentially explosive dust
atmospheres:
II 2D Ex tb IIIC T135°C Db
Code
Meaning
Symbol Ex
II
Equipment group
II which is suitable for all
potentially explosive areas other than firedamp-
endangered excavations
2
Equipment in category 2 is intended for use in
areas which has to be calculated that an explo-
sive atmosphere of gas, dust, fog, or dust/air
mixtures can occur occasionally.
D
D = dust
Ex
The European standard for explosion protection
has been applied.
tb
Protection by housing (for EPL Db);
IIIC
Electric devices of group IIIC are intended for use
in areas where an explosive dust atmosphere (C:
conductive dust) must be expected, excerpt
areas susceptible to fire damp.
T135°C Maxmimum surface temperature 135 °C
Db
Equipment Protection Level (EPL) Classification
Db for equipment with "high" level of protection
for use in combustible dust atmospheres where
there is no risk of ignition during normal opera-
tion or foreseeable failures/malfunctions.
4.5
Specific conditions
WARNING
Explosion hazard and danger to life, or substan-
tial property damage!
All used components and accessory parts must
fulfill the requirements for explosion protection
according to the 2014/34/EU directive.
The conditions on use given in this documenta-
tion must be taken into account for any project
planning and be observed during operation.
Notes about test number
The EC type test certificate number for MKE
motors is designated by the "X" in the declaration
of conformity and on the type plate. This marking
is an indication of special conditions that must be
observed in conjunction with the safety and
health requirements specified in the underlying
standards. The following special conditions must
be observed for the safe operation of the motors
in the plant:
•
The permissible ambient temperature range
is 0 ... 40°C.
•
The gap width and length acc. to EN
60079-1, were exceed or fall below.
•
A repair of flameproof gaps must be done
regarding the specifications of the manufac-
turer. A repair according to the values in EN
60079-1 is not allowed.
•
Maintenance and repair of motors must
exclusively be done by the certified Rexroth
service.
•
Screws with at least strength class 8.8 must
be used to close off the flameproof enclosure
(housing, terminal box, ...).
•
Only those components required for the
installation and mounting of components (Ex
cable glands, connecting parts, ...) are
approved which technically comply with the
standards of the Declaration of Conformity,
