Danfoss VLT Automation VT Drive FC 322 Programming Manual page 226

2 Parameter Description
2
[0] * Disabled
[1] Enabled
22-83 Speed at No-Flow [RPM]
Range:
Application [Application dependant]
dependent*
22-84 Speed at No-Flow [Hz]
Range:
Application [Application dependant]
dependent*
22-85 Speed at Design Point [RPM]
Range:
Application [Application dependant]
dependent*
22-86 Speed at Design Point [Hz]
Range:
Application [Application dependant]
dependent*
224
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Speed at System Design Working Point is not known: Where the Speed at System Design Working
Point is unknown, another reference point on the control curve needs to be determined by means
of the data sheet. By looking at the curve for the rated speed and plotting the design pressure
(H , Point C) the flow at that pressure Q
DESIGN
design flow (Q , Point D). the pressure H
DESIGN
points on the pump curve, along with H
calculate the reference point B and thus to plot the control curve which will also include the System
design Working Point A.
Disabled [0]
: Work Point Calculation not active. To be used if speed at design point is known (see
table above).
Enabled [1] : Work Point Calculation is active. Enabling this parameter allows the calculation of the
unknown System Design Working Point at 50/60 Hz speed, from the input data set in
Speed at No-Flow [RPM]
par. 22-83 par. 22-84
Flow Speed Pressure at Rated Speed
, par. 22-88
par. 22-90 Flow at Rated Speed .
Function:
Function:
Function:
Function:
MG.20.W1.22 - VLT is a registered Danfoss trademark
VLT Automation VT Drive FC322
can be determined. Similarly, by plotting the
RATED
at that flow can be determined. Knowing these two
D
as described above, allows the frequency converter to
MIN
Speed at No-Flow [Hz]
, par. 22-87
Flow at Design Point
, par. 22-89
Programming Guide
Pressure at No-
and