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13-4
Motors for Hazardous Areas
13.2 Appropriate Use
Range of application
13.3 Conditions for Application
Connection specifications
Grounding
Note:
IndraDyn A EX motors themselves are not certified as
explosion-protected devices, but are only prepared for
acceptance as a part of an overall system. Please also
observe the notes in Chapter 13.6 "Additional Components".
Necessary safety equipment is to be prepared by the user.
The motors described here (components for Group II, Category 2G,
ATEX guideline 94/9/EG, Appendix II, Section 2.2.1) may only be used in
an environment in which
• no explosive atmosphere due to gases, vapors or mist/fog is likely to
develop, or
• an explosive atmosphere due to gases, vapors or mist/fog can
occasionally occur.
The system and the components must thus be designed and
manufactured by the user in such a manner that sources of ignition are
avoided assuming that device malfunctions occur frequently and that
operating states occur that are usually unexpected.
Danger of explosion!
⇒ To ensure protection from explosion, only use
scavenging devices with an ATEX protection type
suitable for the motor, or higher.
DANGER
⇒ The values indicated on the identification label (Fig.
13-5),
scavenging gas, initial pressure, excess pressure
etc. must be ensured and monitored by the
scavenging device.
The motors may only be operated with Bosch Rexroth drive control
devices
of
the
IndraDrive
manufacturers are not permitted. The connector terminals in the terminal
box must be screwed on tightly. Do not disconnect or connect connectors
when they are energized due to the danger of sparking within hazardous
areas!
Speed-controlled drive systems contain unavoidable discharge currents
above ground. For this reason the motors have to be grounded over the
motor cable and over a separate ground wire with min. 4mm² cross-
section, as specified in the connection diagram. Check that the position of
the grounded conductor is fixed before commissioning.
If the grounded connector in the motor cable and the second separate
grounded connector on the motor housing are not connected or are
interrupted by corrosion or other defects during their lifetime, the
discharge current flows (as leakage current) over conducting housing
parts. This must be prevented using the measures mentioned above
(ATEX guideline 94/9/EG, Appendix II, Chapters 1.2.3, 1.3.3, and 1.4).
for
example
for
scavenging
series.
Control
devices
DOK-MOTOR*-MAD/MAF****-PR03-EN-P
Rexroth IndraDyn A
volume,
from
other
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