Interroll Drum motor series i, S, S/A, D
Options and accessories
66
Version 4.1 (06/2015) en-US
Translation of original instruction manual
• Voltage: If a frequency inverter with single-phase supply is installed at the drum motor, it
must be ensured that the specified motor is dimensioned for the frequency inverter output
voltage and is connected accordingly. Single-phase motors cannot be operated on the
frequency inverter.
• Output frequency: Applications with output frequencies in the speed range under field
control above 70 Hz should be avoided (for asynchronous motors only). High frequencies
can cause noise, vibrations and resonances and reduce the rated output torque of the motor.
With 87-Hz technology, asynchronous motors can be operated up to a maximum frequency
of 87 Hz. However, at 87 Hz the motor may not take up more power than specified on the
type plate of the motor. 87-Hz technology requires a motor that has at least 75 % power
reserves in 50-Hz operation. Caution should be exercised when using V/f-regulated inverters
with frequencies below 20 Hz since it could result in overheating or power loss of the motor.
For information about required power reserves, see your local Interroll dealer.
Synchronous motors can be operated with frequency inverters that are sold by Interroll
between 7 Hz and 200 Hz.
• Motor output: Not all frequency inverters can operate motors with more than 6 poles and/
or output powers below 0.2 KW / 0.27 PS. If in doubt, please contact your local Interroll
dealer or the supplier of the frequency inverters.
• Frequency inverter parameters: Frequency inverters are usually delivered with factory
settings. Given these settings, the inverter is generally not immediately ready for operation.
The parameters have to be adjusted to the respective motor. For frequency inverters sold by
Interroll, startup instructions specifically created for drum motors for the respective frequency
inverters can be supplied upon request.
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