[V]
[Hz]
L
Q
Fmax
Fedge
Foff
Ustart
Uout
16.05.2007
v_u_f_kennlinie.vsd
Uout
Output voltage
Ustart
Startvoltage
Foff
Shutdown Freq.
Fedge
Edgefrequency
Fmax
Maximum frequency
L
linear
Q
Square (factory setting)
Startvoltage
Startvoltage
The start voltage is used to apply enough torque to the motors to insure they will run at
low speed.
Caution!
In order to prevent overcurrent and unnecessarily high thermal load of the
motor, do not select to high a setting.
Adjustment range: 0 - 25 % (percentage of the maximum output voltage)
Factory setting: 8 %
VF quadratic
VF quadratic
U/f curve linear or square
Factory preprogrammed square characteristic curve
“
UF square
”
=
“
ON
”
for the
operation of voltage controllable fans.
For operation with linear curve
“
UF quadratic
”
=
“
OFF
”
Operating Instructions
Fcontrol
–
model series FTET4/6/10AHMQ-L
The Installation menu
L-BAL-E139-GB 2022/03 Index 006
Part.-No.
50/92