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Table 7-4
Set value
Alarm
Shutting down
7.9
Test run
After installation or inspection, carry out a test run:
1. Start up the machine without a load. To do this, close the circuit breaker and do not switch
2. If the machine is running smoothly and evenly, switch on the cooling equipment. Continue
3. If it runs perfectly, connect a load.
SIMOTICS FD 1LQ1
Operating Instructions 01/2019
Set values during normal operation
off prematurely. Check whether it is running smoothly.
Switching the machine 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 machine to run down before switching it on again.
to observe the machine 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.
Temperature for insulation class 180(H)
T
+ 10 K ≤ 170° C
op
T
+ 15 K ≤ 180° C
op
Start-up
7.9 Test run
97
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