Emotron AB 01-3694-01r2 Installation 21
VSD model 300 to 1500
Fig. 26 Connecting motor and mains cables
VSD models 300 to 1500 are supplied with Klockner Moel-
ler K3x240/4 power clamps.
For all type of wires to be connected the stripping length
should be 32 mm.
3.6 Thermal protection on the
motor
Standard motors are normally fitted with an internal fan.
The cooling capacity of this built-in fan is dependent on the
frequency of the motor. At low frequency, the cooling capac-
ity will be insufficient for nominal loads. Please contact the
motor supplier for the cooling characteristics of the motor at
lower frequency.
Motor thermistors offer better thermal protection for the
motor. Depending on the type of motor thermistor fitted,
the optional PTC input may be used. The motor thermistor
gives a thermal protection independent of the speed of the
motor, thus of the speed of the motor fan. See the functions,
Motor I
2
t type [231] and Motor I
2
t current [232].
3.7 Motors in parallel
It is possible to have motors in parallel as long as the total
current does not exceed the nominal value of the VSD. The
following has to be taken into account when setting the
motor data:
L1 L2 L3 PE PE U V W
WARNING: Depending on the cooling
characteristics of the motor, the application,
the speed and the load, it may be necessary
to use forced cooling on the motor.
Menu [221]
Motor Voltage:
The motors in parallel must have the
same motor voltage.
Menu [222]
Motor Frequency:
The motors in parallel must have the
same motor frequency.
Menu [223]
Motor Power:
Add the motor power values for the
motors in parallel.
Menu [224]
Motor Current:
Add the current for the motors in parallel.
Menu [225]
Motor Speed:
Set the average speed for the motors in
parallel.
Menu [227]
Motor Cos PHI:
Set the average Cos PHI value for the
motors in parallel.
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