Danfoss VLT AQUA Drive FC 202 Design Manual page 13

How to Read this Design Gui...
1.1.5 Power Factor
The power factor is the relation between I
3 × U × I 1 × COS ϕ
Power factor =
U × I RMS
3 ×
The power factor for 3-phase control:
I 1 × cos ϕ1 I 1
= = since cos ϕ1 = 1
I RMS I RMS
The power factor indicates to which extent the frequency
converter imposes a load on the mains supply.
The lower the power factor, the higher the I
same kW performance.
I RMS = I 1 2 + I 5 2 + I 7 2 +. . + I n 2
In addition, a high power factor indicates that the different
harmonic currents are low.
The built-in DC coils produce a high power factor, which
reduces the imposed load on the mains supply.
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VLT AQUA Drive FC 202 Design Guide
and I .
1 RMS
for the
RMS
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MG20Z102 - VLT is a registered Danfoss trademark
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