Single phase wattage total to 3-phase wattage total?

If I know my single phase wattage total (adding up the wattage of all my loads (2500 watt lamps) for a power total) what do I do to get a 3-phase wattage total.





Do I divide that by 3 or do I divide that by 1.73 (square root of 3)?





I can find 3-phase to single phase power calculations (on the net) but not the other way (single phase totals to 3-phase total).





Thanks


KJ

Single phase wattage total to 3-phase wattage total?
Given resistive loads,


P = P1 + P2 + P3


If your phases are balanced


P = 3Pφ





P = V(line-line)*I(line)√3


V(line-neutral) = V(line-line)√3


Pφ = V(line-line)*I(line)/√3
Reply:Watts are Watts. there is no difference between single phase watts and 3 phase watts.





Your 3-phase amps will be less, but your watts will be the same, if you are concerned about energy usage.
Reply:for 3 ph delta


line amps=1.73*phase amps


line volts=phase volts


line watts=1.73*phase watts


for 3 ph wye


line amps=phase amps


line volts=1.73*phase volts


line watts=1.73*phase watts
Reply:Single phase KW= (V*A*Power Factor)/1000





3 Phase KW=(V*A*Power Factor*1.732)/1000





Power factor = Watts/(V*A)
Reply:3 phase power =1.732 X voltage x current x power factor(1)


is the correct Answer for 3 phase power.power factor will be 1 in case of resisitive load, it will vary depends upon inductive load,if capacitance increase it wil go to unity
Reply:The watts should remain the same. It will be the voltage and the amps that vary.