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4.8
Voltage and frequency fluctuations during line operation
Unless otherwise stated on the rating plate, the permissible voltage/frequency fluctuation is
corresponds to Zone B in IEC / EN 60034‑1. Permissible fluctuations that go beyond this are
indicated on the rating plate – or for some versions, on a supplementary plate.
Operate the machine in continuous operation in Zone A. Prolonged operation in Zone B is
not recommended:
• Exceeding the permissible tolerances for voltage and frequency can lead to an impermissibly
high temperature rise of the winding. This can result in long-term damage to the winding.
• Limit exceptions of this sort with regard to the values that arise, how often, and for how long
they occur.
• Where possible and within a reasonable time take corrective actions such as reducing the
power. In this way you can avoid that the service life of the machine is reduced as a result of
thermal aging.
4.9
Rotational speed limit values
Danger as a result of resonance within certain speed ranges
At over-critical speeds, machines encounter resonance within certain speed ranges. Such
vibrations can reach impermissibly high levels. This can result in death, serious injury or material
damage.
• The controller must ensure that those speed ranges are blocked when the converter is in
operation. Please comply with the data on the blocked speed ranges specified in the electrical
data.
• The blocked speed ranges must be run through rapidly.
Machine damage due to excessively high speeds
Excessive rotational speed can lead to serious damage to the machine. This can result in death,
serious injury or material damage.
• Avoid operation above the permissible speed by using the appropriate control function.
• Comply with the speeds stamped on the rating plate and in the electrical data.
4.10
System-inherent frequencies
Excessively high vibration levels and system resonances can damage the machine set.
• Configure and match the system consisting of the foundation and machine set in such a way
that no system resonances can arise and result in the permissible vibration levels being
exceeded.
• Do not exceed the vibration values according to DIN ISO 10816-3.
1PC1423 roller-table motors SH 112 ... 400
Operating Instructions
Preparing for use
4.10 System-inherent frequencies
37
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