4
3
KEB COMBIVERT F4-C
8
Name: Basis
20.03.98
CP - Parameter
©
KEB Antriebstechnik, 1997
All Rights reserved
Operation
Chapter
Section
Page
Date
Speed search
When connecting the frequency inverter to a coasting motor, an error may be triggered
as a result of the different rotary field frequencies. At activated speed search the
inverter searches for the actual motor speed, adapts the output frequency and
accelerates with the adjusted ramp to the preset setpoint value. During the search
phase the display indicates „SSF“ (CP.2). The parameter defines the condition under
which the function is effective. In case of several conditions the sum of the values
must be entered.
Example: C.16 = 12 means after reset and after Auto-Reset UP
Setting range:
0...15
Value
Condition
Resolution:
1
0
function off
Factory setting:
8
1
at control release
Customer setting:
_______
2
at switch on
4
after reset
8
after Auto-Reset UP
With this parameter a controlled output voltage in reference to the rated frequency
can be adjusted. Thus voltage fluctuations at the input as well as in the DC-link circuit
have little effect on the output voltage (U/f-characteristic). Among other things the
function permits an adaption of the output voltage to special motors. In the example
below the output voltage is stabilized to 230 V (0% boost).
Setting range:
150...649 V, oFF
Resolution:
1 V
Factory setting:
oFF
Customer setting:
_______ V
250 V
CP.17 = 230 V
190 V
CP.5 = 50 Hz
f
U
N
/U
A
U
N
= mains voltage
U
A
at U
N
= 190V stabilized
U
A
at U
N
= 190V unstabilized
U
A
at U
N
= 250V unstabilized
U
A
at U
N
= 250V stabilized
U
A
= output voltage
Voltage stabilization
