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3. If it runs perfectly, connect a load.
4. During the test run, check and document the following:
– Check whether it is running smoothly.
– Document the voltage, current and power values. As far as possible, document the
– If this is possible using the available measuring equipment, check the bearing and
– Check the machine for noise or vibrations on the bearings or bearing shields as it
5. In case of uneven running or abnormal noise, switch off the machine. As the machine
runs down, identify the cause.
– If the mechanical operation improves immediately after the machine is switched off,
– If the mechanical running does not improve immediately after switching the machine
Standard motors SH 63 ... 355
Operating Instructions, 12/2018, A5E38483075A
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.
corresponding values of the driven machine.
stator winding temperatures until they have reached steady-state values.
runs.
then the cause is magnetic or electrical.
off, then the cause is mechanical.
- Imbalance of the electrical machine or the driven machine
- The machine set has not been adequately aligned
- The machine is being operated at the system resonance point. System = motor, base
frame, foundation, ...
NOTICE
Serious damage to the machine
If the vibration values in operation are not maintained in accordance with DIN ISO
10816-3, then the machine can be mechanically destroyed.
• During operation, observe the vibration values in accordance with
DIN ISO 10816-3.
Commissioning
7.2 Switching on
83
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