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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. If at all possible, run the machine without load and check that it is running smoothly.
2. If it runs perfectly, connect a load.
3. If this is possible using the available measuring equipment, check the bearing and stator
winding temperatures.
8.3
Switching off the external fan
Do not immediately switch off the separately-driven (external) 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 switching-off
● Check the machine before recommissioning the driven machine after an Emergency Off.
● Eliminate all the causes that have led to the emergency off
1MB..1/2/3/4 - shaft heights 63 ... 355
Operating Instructions, 06/2020, A5E44455710A
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.
Operation
8.2 Switching on the machine
103
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