Lenze 8615E - Manual (Page 73)

Vif-rated frequency
With the V/f-rated frequency, the slope of the characteristic is set.
The value to be entered CO1 5 results from the motor ratings:
V f -- rated frequency =
4 0 0 v
. rated motor frequency
The values for the most common motor be obtained from
the following table.
Motor data
rated voltage rated frequency frequency (C015)
3 8 0 V
4oov
4 1 5 v
415v 60Hz
440v 6 0 H z
4 6 0 V 6 0 H z
4aov
4aov
60Hz
Voltage boost
In the low range, the obtained torque is determined largely
by the set voltage boost. If you set (CO1 make sure that the
motor be destroyed by overheat.
Experience that self-ventilated Standard asynchronous
machines of insulation B be operated in a frequency
range up to 25Hz only for a short time with rated current. Therefore
proceed as follows:
l
motor should be operated in idle running.
l
Provide a of 4 to 5 Hz.
l
The voltage boost should be set such that
the motor current (C054) does not exceed the rated value
for Operation in the low frequency range.
the motor current (C054) does not exceed 80 % of its rated
value for permanent Operation in the
frequency range.
For data of the permissible motor current please refer the
motor manufacturer.
Forced-ventilated machines be permanently operated with
current even in the low frequency range.
Name Parameter is printed in Acceptance
linear characteristic V SH + PRG
characteristic characteristic V
50 Hz 7.5 Hz (0.1 Hz) 100 Hz ON-LINE
freauencv 1 0 0 H z 9 6 0 H z )
Voltage boost 0 % 0 % (0.1
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