How to calculate AC and DC amps, kilowatts and ohms

How to Calculate AC and DC Amps, Kilowatts, Ohms

                                AC SINGLE PHASE AMPS TO KILOWATTS CALCULATION FORMULA

AC AMPS TO KILOWATTS -Single Phase

                      The real power (P) in kilowatts is equal to the power factor (PF) times the phase current in amps, times the RMS Voltage (V) in volts divided by 1000

P (kW) =PF x I x V ÷ 1000

P = Kilowatt, I = Ampere, V = Volts (L-N)

E.g. available value: PF =0.90, I = 2.5, V = 230

kW (P) = 0.90 X 2.5 X 230 ÷ 1000 = 0.5175

Answer is : kW (P) = 0.5175

AC KILOWATTS TO AMPS -Single Phase

              The current in amps (A) is equal to 1000 times the power (P) in kilowatts, divided by the power factor (PF) multiply the RMS voltage (V) in volts:

I (A) = 1000 x P (kW) ÷ (PF x V)

E.g. available value: kW =0.5175, I = 2.5, V = 230

I (A) = 1000 x .5175 ÷ (0.9 x 230) = 2.5

Answer is : I (A) = 2.5A

DC AMPS TO KILOWATTS

                The power (P) in kilowatts is equal to the phase current in amps, times the Voltage (V) in volts divided by 1000

P (kW) = I x V ÷ 1000

E.g. available value:  I = 2.5, V = 24vdc

kW (P) = 2.5 X 24 ÷ 1000 = 0.06

Answer is : kW (P) = 0.06

DC KILOWATTS TO AMPS

                    The current in amps (A) is equal to 1000 times the power (P) in kilowatts, divided by the voltage (V) in volts:

I (A) = 1000 x P (kW) ÷ V

E.g. available value:  kW = 2.5, V = 24vdc

I (A) = 1000 x .06 ÷ 24 = 2.5

Answer is : I (A) = 2.5A

AC THREE PHASE KILOWATTS TO AMPS CALCULATION

Calculation with Line to Line Voltage

                 The three phase current in amps (A) is equal to 1000 the power (P) in kilowatts (kW), divided by square root of 3 (√3) the power factor (PF) times the line to line RMS voltage (VL-L) in volts (V):

I (A) = 1000 x P (kW) ÷ (√3 x PF x VL-L)

E.g. available value:  kW = 2.5, VL-L = 420v, √3 = 1.732, PF = 0.80

I (A) = 1000 x 2.5 ÷ (1.732 x .8 x 420)

Answer is : I (A) = 4.3A

AC THREE PHASE AMPS TO KILOWATTS CALCULATION

                    The power consumption in kW when the power factor is 0.8 and the phase current is 4.3A and RMS voltage supply is 420 volts

P (kW) = √3 x PF x A x VL-L ÷ 1000

E.g. available value:  I (A) = 4.3, VL-L = 420v, √3 = 1.732, PF = 0.80

P (kW) = √3 x 0.8 x 4.3 x 420 ÷ 1000

Answer is : P (kW) = 2.5kW

These are the calculations is using to Calculate AC and DC Amps, Kilowatts, Ohms.