Table of Contents
13-20
Motors for Hazardous Areas
13.10 Dismantling
Danger of explosion! Fatal injury due to errors
in activating motors and working on moving
elements!
⇒ Do not work on unsecured and operating machines.
DANGER
⇒ Before touching the motor, let it cool sufficiently after
switching it off. A cooling time up to 140 minutes
can be necessary!
⇒ Ensure that the power is off and that the motor is
disconnected only in an atmosphere that is not
capable of explosions.
⇒ Before working on the system, always use a suitable
measuring instrument (e.g. multimeter) to check
whether parts are still under a residual voltage (e.g.
due to the residual energies of capacitors in filters,
drive devices, etc.); let their discharge times elapse.
⇒ Secure the machine against accidental movements
and against unauthorized operation.
⇒ Before dismantling, secure the motor and power
supply
disconnecting the mechanical connections.
In the case of malfunctions, maintenance or deactivation of the
motors, proceed as follows:
1. Use the control commands to bring the drive to a controlled standstill.
2. Switch off the power and control voltage of the drive device.
3. Only for MAD: Switch off the motor protection switch for the motor
fan.
Only for MAF: Switch off of the power supply of the external cooling
system.
4. Switch off the control device for the motor purging system (observe
the notes of the manufacturers regarding deactivation).
5. Switch off the main switch of the machine.
6. Secure the machine against accidental movements and against
unauthorized operation.
7. Wait for the cooldown times of the motor and the discharge time of
the electrical systems to elapse.
8. Disconnect all electrical connections. Disconnect the scavenging lines
from the motor at the connection threads
9. Before dismantling, secure the motor and power supply against falling
or movement before disconnecting the mechanical connections.
10. Dismantle the motor from the machine. At the MAF motor, also empty
the coolant channels.
11. Log all measures taken in the commissioning log.
Rexroth IndraDyn A
against
falling
or
movement
DOK-MOTOR*-MAD/MAF****-PR03-EN-P
before
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