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System-inherent Frequencies; Torsional Loading Of The Drive Train Due To Faults In The Electrical Supply - Siemens 1LA8 Operating & Installation Instructions Manual

Low-voltage motor simotics tn series n-compact.
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within a reasonable time take corrective actions such as reducing the power. Such actions can
avoid thermal ageing leading to a reduction in the service life of the machine.
Overheating of the winding
Exceeding the permissible tolerances for voltage and frequency can lead to an impermissibly
high temperature rise in the windings and thus cause long-term damage to the machine.

System-inherent frequencies

System resonances
Excessive vibrations and system resonances can damage the machine set.
● Configure and match the system consisting of the foundation and machine set in such a
● The vibration limit values according to DIN ISO 10816-3 must not be exceeded.

Torsional loading of the drive train due to faults in the electrical supply

In the event of faults in the electrical connection during operation, excessive air gap torques
can lead to additional mechanical torsional load on the line shaft.
The system planner is responsible for the entire drive train.
Serious damage to the machine
If the configuration does not correctly recognize the mechanical torsional loadings of the shaft
assembly, this can lead to serious damage to the machine. This can result in death, serious
injury or material damage.
When planning the system, consider the configuration data.
More information about this may be found in the catalog.
SIMOTICS TN Series N-compact 1LA8
Operating Instructions 08/2017
way that no system resonances can arise and result in the permissible vibration levels
being exceeded.
Preparations for use
4.13 System-inherent frequencies


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