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7.5
Preparing for test run
If you want to start the machine for a trial run, ensure that it is connected to the cooling water
supply.
Risk of burns from hot steam
If the cooling water supply fails, the motor will overheat. If cooling water enters the hot
machine, hot steam will suddenly be generated, which escapes under high pressure. The
cooling water system can burst. This can result in death, serious injury or material damage.
● Do not connect the cooling water supply until the machine has cooled down.
7.6
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 T-1FW4 Heavy Duty 1FW4407-1KM81-1BC0-Z
Operating Instructions 11/2018
WARNING
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.
Start-up
7.5 Preparing for test run
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