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kVA Formula:
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kVA (kilovolt-ampere) is a unit of apparent power in an electrical circuit. It represents the total power in an AC circuit, combining both real power (kW) and reactive power (kVAR).
The calculator uses the kVA formula:
Where:
Explanation: This formula calculates the apparent power in a single-phase AC circuit by multiplying the current (amps) by the voltage (volts) and dividing by 1000 to convert to kilovolt-amperes.
Details: kVA calculation is essential for sizing electrical equipment, determining power requirements, and ensuring proper electrical system design. It helps in selecting appropriate transformers, generators, and other power distribution equipment.
Tips: Enter current in amperes and voltage in volts. Both values must be positive numbers. The calculator will compute the kVA value automatically.
Q1: What's the difference between kVA and kW?
A: kVA represents apparent power (the total power in the circuit), while kW represents real power (the actual power doing work). The ratio between them is the power factor.
Q2: Is this formula applicable to three-phase systems?
A: For three-phase systems, the formula is different: kVA = (Amps × Volts × √3) / 1000. This calculator is designed for single-phase systems.
Q3: Why divide by 1000?
A: Dividing by 1000 converts the result from volt-amperes (VA) to kilovolt-amperes (kVA), which is a more practical unit for larger electrical systems.
Q4: Can I use this for DC circuits?
A: For DC circuits, power is simply calculated as P = V × I (in watts). Divide by 1000 to get kW, but the concept of kVA (apparent power) doesn't apply to DC.
Q5: What is power factor and how does it relate to kVA?
A: Power factor is the ratio of real power (kW) to apparent power (kVA). It represents how effectively electrical power is being used, with ideal being 1.0.