Apparent power in volt-amps (VA) to electric current in amps (A).
You can calculate amps from volt-amps and volts, but you can't convert volt-amps to amps since volt-amps and amps units do not measure the same quantity.
The current I in amps is equal to the apparent power S in volt-amps (VA), divided by the RMS voltage V in volts (V):
I(A) = S(VA) / V(V)
So amps are equal to volt-amps divided by volts.
amps = VA / volts
or
A = VA / V
Question: What is the current in amps when the apparent power is 3000 VA and the voltage supply is 110 volts?
Solution:
I = 3000VA / 110V = 27.27A
The current I in amps is equal to the apparent power S in volt-amps (VA), divided by the square root of 3 times the line to line voltage VL-L in volts (V):
I(A) = S(VA) / (√3 × VL-L(V) )
So amps are equal to volt-amps divided by the square root of 3 times volts.
amps = VA / (√3 × volts)
or
A = VA / (√3 × V)
Question: What is the current in amps when the apparent power is 3000 VA and the voltage supply is 110 volts?
Solution:
I = 3000VA / (√3 × 110V) = 15.746A
