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Operation
8.4 Switching on again after an EMERGENCY OFF
Explosion hazard
If the anti-condensation heating is switched on during operation, the temperature class or the
maximum surface temperature of the machine can be exceeded.
In an explosive atmosphere, there is a risk of an explosion. This can result in death, serious
injury or material damage.
• Only switch on the anti-condensation heating after the motor has been switched-off.
8.2
Switching on the machine
1. Operate the machine without a load and check that it is running smoothly.
2. If it runs perfectly, connect a load.
3. Check the bearing temperature and the stator winding temperature if this is possible using
the available measuring equipment.
8.3
Switch off the separately driven fan
Do not immediately switch off the separately-driven fan after switching off the machine. First
wait for the machine to cool down. This will prevent the accumulation of residual heat.
8.4
Switching on again after an EMERGENCY OFF
• After an EMERGENCY OFF, check the machine before recommissioning the driven machine.
• Eliminate all the causes that led to the EMERGENCY OFF
106
WARNING
Comply with the data stamped on the plate of the anti-condensation heating, if available.
NOTICE
Thermal overload of motors connected directly to the line supply
In addition to the load torque, the ramp-up (accelerating) time is essentially influenced by
the moment of inertia to be accelerated. While ramping up when connected to the line
supply, the inrush (starting) current is a multiple of the rated current. This can result in
thermal overload. This can damage the motor.
As a consequence, when ramping up, observe the following:
• Monitor the ramp-up time and number of consecutive starts.
• Comply with the limit values and/or ramp-up conditions specified in the catalog or the
order documentation.
1MB..5/6 shaft height 71 ... 355
Operating Instructions, 11/2023, A5E52779956A
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