Need help to calc the needed cap for a generator

[Chriss]

Hi!
I need to attach 3 caps to a 3 phase generator and for these purpose I need to calculate the capacity for each one.

The caps are connected in delta.
The parameters are:
Reactive Power = 8.125 KVA
Line Voltage ( between 2 phase ) = 510V
Frequency = 50Hz
Power Factor = 0.8

What formula can I use to calculate the cap's correct value?
I using this formula but Im not sure if it is correct:
I have some feeling the capacity is to high calculated. Something I'm missing...

Required Capacitance (per phase) = (Reactive Power × 1000) / (Line Voltage^2 × Frequency × Power Factor)
The result for each cap is: 780uF
Is this a correct?

Thank you for helping.
My best regards.
Chris

[Konkedout]

Been a long time since I did anything like this.  The easy way would be spice simulation.  (??)