Q: What is the formula to calculate power in kilowatts from DC amps and voltage?
A: The formula to calculate power (P) in kilowatts (kW) from DC current (I) in amps (A) and voltage (V) in volts (V) is: P(kW) = I(A) × V(V) / 1000.
Q: How is power calculated in kilowatts for single-phase AC circuits with power factor (PF)?
A: For single-phase AC circuits, the formula to calculate power (P) in kilowatts (kW) when the power factor (PF) is known is: P(kW) = PF × I(A) × V(V) / 1000.
Q: How is power calculated in kilowatts for three-phase AC circuits using line to line voltage and power factor (PF)?
A: In three-phase AC circuits with line to line voltage, the formula for power (P) in kilowatts (kW) is: P(kW) = √3 × PF × I(A) × VL-L(V) / 1000.
Q: What is the formula to calculate power in kilowatts for three-phase AC circuits using line to neutral voltage and power factor (PF)?
A: The formula for power (P) in kilowatts (kW) in three-phase AC circuits using line to neutral voltage is: P(kW) = 3 × PF × I(A) × VL-N(V) / 1000.
Q: How can the power factor (PF) affect power calculations in AC circuits?
A: The power factor (PF) represents the ratio of real power to apparent power in AC circuits. It plays a significant role in determining the actual power delivered by the circuit. The formulas for power calculations involve multiplying the power factor along with current and voltage.
Q: Can you convert amps and ohms to kilowatts using circuit resistance?
A: Yes, you can convert amps and ohms to kilowatts using the formula: P(kW) = I(A)² × R(Ω) / 1000, where P is power in kilowatts, I is current in amps, R is resistance in ohms, and 1000 is the factor for unit conversion.
Q: How does the Amps to Kilowatts conversion formula work for DC circuits?
A: The Amps to Kilowatts formula for DC circuits calculates power by multiplying the current (I) in amps with the voltage (V) in volts and dividing by 1000 to convert to kilowatts (kW).
Q: How is the Amps to Kilowatts conversion formula different for single-phase AC circuits compared to three-phase AC circuits?
A: In single-phase AC circuits, the power factor (PF) is used along with current (I) and voltage (V) to calculate power. In three-phase AC circuits, both line to line voltage (VL-L) and line to neutral voltage (VL-N) can be used, along with the power factor and appropriate factors like √3 or 3, to derive power in kilowatts.
Q: What is the significance of power factor in AC circuits?
A: Power factor indicates the efficiency of an AC circuit by showing the ratio of useful (real) power to the total (apparent) power. It affects power calculations in AC circuits, as the actual power delivered is influenced by how inductive or capacitive elements interact with the circuit.
Q: Can you provide an example of converting amps to kilowatts for a specific circuit?
A: Let's say we have a circuit with a current of 12 amps and a voltage of 120 volts. To convert to kilowatts: P(kW) = 12 A × 120 V / 1000 = 1.44 kW. This means the circuit has a power output of 1.44 kilowatts.
