Interlock Circuit For Anti-Condensation Heating; Noise Emission; Voltage And Frequency Fluctuations In Converter Operation; Rotational Speed Limit Values - Siemens SIMOTICS DP Operating Instructions Manual

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4.10 Rotational speed limit values

4.7

Interlock circuit for anti-condensation heating

If the anti-condensation heating is operated while the machine is running, this can increase the
temperatures inside the machine.
• Install an interlock circuit that switches off the anti-condensation heating once the main
machine is switched on.
• Only switch on the anti-condensation heating after the motor has been switched off. Comply
with the data stamped on the plate of the anti-condensation heating, if available.
4.8

Noise emission

Prevention of hearing damage
If the permissible sound pressure level is exceeded, hearing damage can occur when operating
three-phase motors at their rated power.
The permissible sound pressure level is 70 dB (A).
4.9

Voltage and frequency fluctuations in converter operation

• 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.
4.10 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 note the data on the blocked speed ranges specified in the Electrical Data.
• The blocked speed ranges must be run through rapidly.
40
1FZ shaft height 280
Operating Instructions, 02/2022, A5E51698698A