Interroll Drum motor series i, S, S/A, D
Assembly and installation
Version 4.1 (06/2015) en-US
Translation of original instruction manual
85
If a starting torque of 100 % is required, single-phase drum motors,should be connected to a
starting capacitor and a run capacitor. An operation without starting capacitor can reduce the
starting torque to 70 % of the rated torque listed in the Interroll catalog.
Connect the starting capacitors according to the connection diagrams (See "Connection
diagrams for the S-series", page 44).
The motor must always be installed together with a suitable motor protection, e.g. a motor circuit
breaker or frequency inverter with overcurrent protective function. The protective device must be
adjusted to the rated current of the respective motor (see type plate).
CAUTION
Accidental motor start
Risk of crushing for fingers
4
Connect the integrated thermal circuit breaker to an external control device that interrupts
the current supply to the motor at all poles in case of overheating.
4
After the thermal circuit breaker has tripped, examine and remove the cause for overheating
before the current supply is reactivated.
The standard maximum switching current of the thermal circuit breaker is 2.5 A. For other
options, please contact Interroll.
For operational safety, the motor must be safeguarded against overload with an external motor
protection as well as an integrated thermal protection; otherwise, no warranty can be applied if
the motor should fail.
Asynchronous drum motors can be operated with frequency inverters. Frequency inverters from
Interroll are general adjusted to factory setting and have to be parameterized for the respective
drum motor. For this purpose, Interroll can supply parameterization instructions. In this case,
please contact your local Interroll partner.
4
If no frequency inverter from Interroll is used, the frequency inverter must be correctly
parameterized according to the specified motor data. Interroll can provide only very limited
support for frequency inverters that are not being sold by Interroll.
4
Resonance frequencies in the power supply line must be prevented since the create voltage
spikes in the motor.
If the cable is too long, frequency inverters generate resonance frequencies in the line
between frequency inverter and motor.
4
Use a completely shielded cable to connect the frequency inverter to the motor.
4 Install a sine-wave filter or a motor choke if the cable is longer than 10 meter or if a
frequency inverter controls several motors.
4
Ensure that the cable shield is connected to a grounded part according to the
electrotechnical guidelines and local EMC recommendations.
4
Always observe the installation guidelines of the frequency inverter manufacturer.
Single-phase motor
External motor protection
Integrated thermal
protection
Frequency inverter
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