7.2.1 Test run
After installation or inspection, carry out a test run:
1. Start the machine without a load. To do this, close the circuit breaker and do not switch o
prematurely. Check whether it is running smoothly.
Switching the machine o again while it is starting and still running at slow speed should only
be done to the extent necessary, for example for checking the direction of rotation or for
checking in general.
Allow the machine to run down before switching it on again.
2. If the machine is running smoothly and evenly, switch on the cooling equipment. Continue
to observe the machine for a while in no-load operation.
3. 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 inuenced 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 specied in the catalog or the
order documentation.
Commissioning
7.2Switching on
1LE5, 1PC4 shaft heights 280 ... 355
Operating Instructions, 11/2022, A5E41454666A 85
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