1.    Below are presented values for PFC Steps, 25kvar, 50kvar at nominal voltage 400V, 50Hz and for detuning factor 7% (fr=189Hz)

 

1.    Step # 1, PFC 25kvar 400V 50Hz p=7%

-       ΔU = 7.525%

-       fr = 189Hz

-       Uc = 430.1V

-       C = 3x154.18µF – Needed capacitance

-       L = 3x1.533mH    - Inductance of filter reactor

 

For this step proper capacitors are as follows (depending on selected their nominal voltage):

 

-       KNK3053 28.1kvar 440V 50Hz HD       Quantity: 1 piece

Nominal voltage: 440V 50Hz

Nominal frequency: 50Hz

Nominal power: 28.1kvar

Nominal capacitance: 3x154µF

Dimensions: Ø116x285mm

 Or

-       KNK3053 33.5kvar 480V 50Hz HD       Quantity: 1 piece

Nominal voltage: 480V 50Hz

Nominal frequency: 50Hz

Nominal power: 33.5kvar

Nominal capacitance: 3x154.3µF

Dimensions: Ø116x285mm

                The reactor should be: 25kvar 400V 50Hz L=3x1.533mH

 

1.                      Step # 2,  PFC  50kvar 400V 50Hz p=7%

-       ΔU = 7.525%

-       fr = 189Hz

-       Uc = 430.1V

-       C = 3x308.37µF – Needed capacitance

-       L = 3x0.767mH   - Inductance of filter reactor

 

For this step proper capacitors are as follows (depending on selected nominal voltage):

 

-       KNK3053 28.1kvar 440V 50Hz HD        Quantity: 2 pieces in parallel

Nominal voltage: 440V 50Hz

Nominal frequency: 50Hz

Nominal power: 28.1kvar

Nominal capacitance: 3x154µF

Dimensions: Ø116x285mm

 

Or

-       KNK3053 33.5kvar 480V 50Hz HD        Quantity: 2 pieces in parallel

Nominal voltage: 480V 50Hz

Nominal frequency: 50Hz

Nominal power: 33.5kvar

Nominal capacitance: 3x154.3µF

Dimensions: Ø116x285mm 

                  The reactor should be: 50kvar 400 50Hz L=3x0.767mH