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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
– Check the bearing temperature and the stator winding temperature until they have
– Check the machine for noise or vibrations on the bearings or bearing shields as it runs.
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, then
– If the mechanical running does not improve immediately after switching the machine
• In order to guarantee reliable starting and/or sufficient margin to the stall torque, in the lower
frequency range a voltage boost of approx. 10 ... 20 % of the 50 Hz rated voltage may be
required. If necessary, contact the manufacturing plant.
• The coast down time of the machine can be significantly reduced by short-circuiting the
terminals (also through resistors). Braking by short-circuiting the stator winding does not
have any negative effect on the magnets of permanent-magnet synchronous machines.
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Operating Instructions, 07/2020, A5E46712792A
corresponding values of the driven machine.
reached steady-state values, assuming that this is possible with the measuring equipment
available.
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
7.3 Switching on
77
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