Switching On - Siemens SIMOTICS XP 1MB5 Series Operating Instructions Manual

Commissioning

7.6 Switching on

7.6 Switching on
Measures for start-up
After installation or inspections, the following measures are recommended for normal start-up
of the machines:
● Start the machine without a load. To do this, close the circuit breaker and do not switch the
machine off prematurely. 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 to a standstill before
switching it back on again.
● Check mechanical operation for noise or vibration at the bearings or end shields.
● If the machine is not running smoothly or is emitting abnormal noises, switch it off, and
determine the cause of the fault as it runs down.
● If mechanical operation improves immediately after the machine is switched off, then the
cause is magnetic or electrical, e.g. voltage imbalance, magnetic imbalance. If mechanical
operation does not improve immediately after switching the machine off, then the cause is
mechanical, e.g. an imbalance in the electrical machines or in the driven machine,
inadequate alignment of the machine set, operation of the machine with the system
resonating (system = machine + base frame + foundations etc.).
● If the machine runs perfectly in terms of its mechanical operation, switch on any cooling
devices present and continue to monitor the machine for a while as it idles.
● If it runs perfectly, connect a load. Check that it runs smoothly.
Read off and document the values for voltage, current, and power.
Where possible, read off corresponding values for the driven machine and document them
as well.
● Monitor the bearing temperature, winding temperature, etc. until the system reaches a
steady state.
Document these, provided this is possible with existing measuring instruments.
NOTICE
Destruction of the machine
The machine can be destroyed if the vibration values are not strictly complied with.
● In operation, maintain vibration values in accordance with DIN ISO 10816‑3.
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Operating Instructions, 05/2019, A5E45959221A
1MB5 SH 400/450