Power On - Siemens 1LA8 Operating Instructions Manual

7.6

Power on

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, if at
2. Continue to observe the machine for a while in no-load operation.
3. If it runs perfectly, connect a load.
4. In case of uneven running or abnormal noise, switch off the machine. As the machine runs
NOTICE
Serious damage to the machine
The vibration values encountered during operation must be satisfied in accordance with DIN
ISO 10816-3, otherwise the machine could be damaged or destroyed.
During operation, observe the vibration values in accordance with DIN ISO 10816‑3.
7.7 De-energizing
● If the controller does not do this automatically, switch on any anti-condensation heating
● Do not switch on the anti-condensation heating until at least one hour after the motor has
SIMOTICS TN Series N-compact 1LA8
Operating Instructions 05/2014
all possible, switch off prematurely. Check whether it is running smoothly.
Maximum number of permissible consecutive starts for machines on the power supply:
Three cold / two warm
The start conditions for converter machines can be found in the catalog.
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.
– Check whether it is running smoothly.
– Read the values for voltage, current, and output and log them.
– If possible, read and log the corresponding values for the working machine.
– If this is possible using the available measuring equipment, check the bearing and stator
winding temperatures until they have reached steady-state values.
– Check the machine for noise or vibrations on the bearings or bearing shields as it runs.
down, identify the cause.
– If the mechanical operation improves immediately after the machine is switched off, then
the cause is magnetic or electrical.
– If the mechanical operation does not improve immediately after switching the machine
off, then the cause is mechanical. For example, this can be caused by imbalance in the
electrical machine or the driven load, inadequate alignment of the machine set,
operation of the machine at the system resonance point (system = motor, base frame,
foundation etc.).
during stoppages. This will avoid the formation of condensation.
been switched off. This prevents damage to the winding insulation.
Start-up
7.7 De-energizing
87