OPERATING INSTRUCTIONS NORDAC Frequency Inverters

Menu displayed text descritption
option
11 M a x . f r e q u e n c y Setting range from 0 to 120 Hz, but > fmin
6 0 H z P 1
12 U/f - c h a r a c t e r . Transition of the U/f characteristic curve (voltage/frequency
characteristic curve) from
5 0 H z P 1 - proportional adjustment of voltage and frequency (constant torque) to
- constant voltage and rising frequency
(field attenuation with falling torque)
13 S e t p o i n t d e l a y In the case of a setpoint step-change starting from "0":
0 . 0 0 s e c P 1 - the absolute minimum frequency (2 Hz) is applied
immediately to the inverter output
- a further increase in the frequency is delayed by the
the set time
In the case of a setpoint step-change to "0":
- braking on the braking ramp to absolute minimum frequency (2 Hz)
- the absolute minimum frequency (2 Hz) is retained for the set period
- the controller is then disabled automatically
Used for:
- control of an electro-magnetic brake by the inverter in conjunction
with option 14 or 15/16
- heavy duty starting
(s)
17