Siemens SIMOTICCS A 1FU9, Руководство по эксплуатации, Страница: 85 / 126

These machines have a warning sticker on the fan cover.
8.2.2 Dangerous voltage when the rotor rotates
WARNING
Dangerous voltage when the rotor rotates
There are dangerous voltages at the terminals while the machine rotor rotates and immediately
afterwards.
You must observe the following safety instructions to prevent death, injury or material damage:
• Do not touch the terminals while the rotor is rotating and immediately afterwards.
• To discharge the winding, after the rotor comes to a standstill, connect the winding to
ground potential.
8.3 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.
NOTICE
Thermal overload
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 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.
3. Check the bearing temperature and the stator winding temperature if this is possible with the
available measuring equipment.
8.4 Switch 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.
Operation
8.4 Switch off the external fan
1FU9
Operating Instructions, 07/2020, A5E46712792A
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