Interroll DL Series - Page 27

Version 1.2 (08/2022) en
Translation of original operating instructions 27 of 64
Options and accessories
Voltage increase:
Interrollmotorwindingsaredesignedforaratedvoltageincreaserateof1kV/μs.Ifafrequencyinvertergenerates
a steeper voltage increase, motor chokes must be installed between the frequency inverter and the motor. However,
since all Interroll drum motors run in an oil bath, the risk of overheating or damage to the motor due to high voltage
increase rates is extremely low. Contact your local Interroll dealer about the need for motor chokes.
Voltage:
Ifafrequencyinverterwithsingle-phasesupplyisinstalledinthedrummotor,thespeciedmotormustbedesigned
for the frequency inverter output voltage and must be connected accordingly. Single-phase motors cannot be
operated with a frequency inverter.
Output frequency:
Applicationswithoutputfrequenciesinthespeedrangeundereld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.
Motor output:
Not all frequency inverters can run 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 must be adjusted to the corresponding motor. For frequency
inverterssoldbyInterroll,startupinstructionsforthecorrespondingfrequencyinvertersthatwerespecicallycreated
for drum motors can be supplied upon request.