User manual

93
Version 2.4 (10/2011) en
Original instructions
Drum Motor
Installation
Single-phase motor Single-phase Drum Motors should be connected to a starting capacitor and a
running capacitor if 100 % starting torque is required. Without a starting
capacitor, the starting torque may be as low as 70 % of the nominal torque listed
in the Interroll catalog.
For connection of starting capacitors, refer to the connection diagrams (see
chapter "Connection Diagrams" of the respective series).
External motor protection The motor must always be installed together with a suitable external motor
protection device, e. g. an overcurrent relay. The protection device must be set
according to the rated current of the specific motor (see label).
Integral Thermal Control
The maximum switching current of the thermal switch is 2.5 A as standard. For
other options please contact Interroll.
Frequency converter Asynchronous Drum Motors can be operated with frequency converters.
Frequency converters from Interroll are already set (when specified) to the
parameters suitable for the respective Drum Motor.
¾ If you don't use an Interroll frequency converter, set up the frequency
converter using the correct parameters according to the motor data.
¾ Do not allow resonant frequencies in the power line to cause voltage spikes in
the motor.
Frequency converters create resonant frequencies in the cable between the
frequency converter and the motor if the cable is too long.
¾ Use a fully screened cable to connect the frequency converter to the motor.
¾ If the cable is longer than 10 m or if one frequency converter controls more
than one motor install a motor sine filter or a motor inductor.
¾ Ensure, that the cable screen is connected to ground earth, according to
electrical engineering rules and to local EMC recommandations.
Backstop (one-way rotor
bearing)
Accidental motor starts. Risk of pinched fingers.
¾ Connect the Integral Thermal Control switch to an
external control device which interrupts the motor
power supply in case of overheating.
¾ Investigate and remedy the cause of the overheating
prior to turning on the power supply again, when the
Internal Thermal Control switch has been tripped.
CAUTION
Damage of the Drum Motor with Backstop option due
to incorrect connection of rotation direction.
¾ Connect the motor according to the connection
diagrams (see chapter "Connection Diagrams" of the
respective series). The correct direction is indicated by
an arrow positioned on the end housing on the electrical
connection side of the Drum Motor.