Switching On The Machine - Siemens 1MB115 Installation And Maintenance Manual

6.1.6 Switching off the anti-condensation heating when the
machine is switched on
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 the anti-condensation heating on after the motor has been
switched off.
6.2

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.
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
3. If this is possible using the available measuring equipment, check the
bearing and stator winding temperatures.
WARNING
catalog or the order documentation.
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