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7.2.1
Test run
After installation or inspection, carry out a test run:
1. Start up the motor without a load. To do this, close the circuit breaker and do not switch off
2. If the motor is running smoothly and evenly, switch on the cooling equipment. Continue to
3. If it runs perfectly, connect a load.
1LE8 轴高 80 ... 355
操作说明, 11/2022, A5E52373573A
prematurely. Check whether it is running smoothly.
Switching the motor off again while it is starting up and still running at slow speed should
be kept to a bare minimum, for example for checking the direction of rotation or for
checking in general.
Allow the motor to run down before switching it on again.
observe the motor for a while in no-load operation.
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.
Commissioning
7.2 Switching on
207
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