Were you running 240 single phase? Then 62 amps is 11.904 KW This is an excellent output on a 12 KVA (10KW) generator head since it can take it for a long time without overheating. You just forgot to include the power factor in your calculations. Sorry I am just an engineer that has had this crap engraved in his brain for over 40 years now. It is kind of like fingernails on a chalk board to me since I am an EE. Sorry not trying to say anything bad OK! Please don't take take this as me being a smart as*. I am enjoy helping others as others have helped me. I check out this site as much as I can since as I always learn something.
KW
AC single phase amps to kilowatts calculations
The power P in kilowatts (kW) is equal to the power factor PF times the phase current I in amps (A), times the RMS voltage V in volts (V) divided by 1000:
P(kW) = PF × I(A) × V(V) / 1000 = (.8 x 62 x 240) / 1000 = 11.904KW
AC three phase amps to kilowatts calculation
Calculation with line to line voltage
The power P in kilowatts (kW) is equal to square root of 3 times the power factor PF times the phase current I in amps (A), times the line to line RMS voltage VL-L in volts (V) divided by 1000:
P(kW) = √3 × PF × I(A) × VL-L (V) / 1000
Calculation with line to neutral voltage
The power P in kilowatts (kW) is equal to 3 times the power factor PF times the phase current I in amps (A), times the line to neutral RMS voltage VL-N in volts (V) divided by 1000:
P(kW) = 3 × PF × I(A) × VL-N (V) / 1000
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KVA
How to convert electric current in amps (A) to apparent power in kilovolt-amps (kVA). You can calculate kilovolt-amps from amps and volts, but you can't convert amps to kilovolt-amps since kilovolt-amps and amps units do not measure the same quantity.
Single phase amps to kVA calculation formula
The apparent power S in kilovolt-amps is equal to phase current I in amps, times the RMS voltage V in volts, divided by 1000:
S(kVA) = I(A) × V(V) / 1000
So kilovolt-amps are equal to amps times volts divided by 1000. kilovolt-amps = amps × volts / 1000orkVA = A ⋅ V / 1000
Example:
What is the apparent power in kVA when the phase current is 12A and the RMS voltage supply is 110V?
Solution: S = 12A × 110V / 1000 = 1.32kVA
3 phase amps to kVA calculation formula
Calculation with line to line voltage The apparent power S in kilovolt-amps (with balanced loads) is equal to square root of 3 times the phase current I in amps, times the line to line RMS voltage VL-L in volts, divided by 1000:
S(kVA) = √3 × I(A) × VL-L(V) / 1000
So kilovolt-amps are equal to √3 times amps times volts divided by 1000. kilovolt-amps = √3 × amps × volts / 1000 or kVA = √3 × A ⋅ V / 1000
Example:
What is the apparent power in kVA when the phase current is 12A and the line to line RMS voltage supply is 190V?
Solution:
S = √3 × 12A × 190V / 1000 = 3.949kVA
Calculation with line to neutral voltage
The apparent power S in kilovolt-amps (with balanced loads) is equal to 3 times the phase current I in amps, times the line to neutral RMS voltage VL-N in volts, divided by 1000:
S(kVA) = 3 × I(A) × VL-N(V) / 1000
So kilovolt-amps are equal to 3 times amps times volts divided by 1000. kilovolt-amps = 3 × amps × volts / 1000orkVA = 3 × A ⋅ V / 1000
Example
What is the apparent power in kVA when the phase current is 12A and the line to neutral RMS voltage supply is 120V?
Solution:
S = 3 × 12A × 120V / 1000 = 4.32kVA
