Star Bridge Rectifier

Hello all,
I am designing a rectifier with a star configuration and I need help clarifying some aspects of the calculations; Screen shots of the circuit is attached.

Power Out = 120 kW
Voltage Out = 15V

DC current = 120,000/15 = 8000amps
Transformer rms current = 0.408 x 8000 = 3264amps
Transformer Secondary L-L voltage = (15V + diode drop) x 1.28
= (15 +1.5) x 1.28 = 21.12V rms
Transformer secondary phase voltage = 12.19V rms


Now the KVA = Sqrt(3) x Vsecondary x secondary current
= sqrt(3) x 21.12 x 3264 = 119kVA

I need clarification on the KVA, which seems lower than the total DC power of the unit.

Thanks