Preparing for use
4.7 Interlock circuit for anti-condensation heating
1LE5, 1PC4 shaft height 315/355
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Operating Instructions, 10/2020, A5E41454666A
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 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.
