Switching On The Machine - Siemens SIMOTICS FD 1LL1 Operating Instructions Manual

Operation

8.2 Switching on the machine

Faults in operation
Deviations from normal operation such as increased power consumption, temperatures or
vibrations, unusual noises or odors, tripping of monitoring devices, etc., indicate that the
machine is not functioning properly. This can cause faults which can result in eventual or
immediate death, serious injury or material damage.
● Immediately inform the maintenance personnel.
● If you are in doubt, immediately switch off the motor, being sure to observe the system-
NOTICE
Risk of corrosion due to condensate
Humid air can condense inside the machine during operation as a result of intermittent duty
or load fluctuations. Condensate can collect inside the motor. Damage such as rust can result.
● Make sure that any condensation can drain away freely.
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
106
WARNING
specific safety conditions.
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.
winding temperatures.
SIMOTICS FD 1LL1
Operating Instructions 04/2016