Switching On With The Anti-Condensation Heating Active; Switching On The Machine - Siemens SIMOTICS XP Operating Instructions Manual

Operation

8.2 Switching on the machine

8.1.2

Switching on with the anti-condensation heating active

Excessively high machine temperature when heating is switched on
If the anti-condensation heating is operated while the machine is running, this can increase
the temperatures inside the machine. Material damage can result.
• Make sure that the anti-condensation heating is switched off before the machine is
switched on.
• Only operate anti-condensation heating when the machine is switched 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. 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.
96
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.
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Operating Instructions, 10/2021, A5E41926185A