A three-phase alternator has a load current...

Question 1 of 270705eccefa3bacbc34ba4d480e1

A three-phase alternator has a load current of 300 amps, with a 0.8 power factor, and supplying 450 volts. What will be the power indicated on the kilowatt meter, located on the main switchboard?

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Question 1 of 27070

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A three-phase alternator has a load current of 300 amps, with a 0.8 power factor, and supplying 450 volts. What will be the power indicated on the kilowatt meter, located on the main switchboard?

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🔍 Key Concepts

• Three-phase power formula relating line voltage, line current, power factor, and kW • Difference between apparent power (kVA) and real power (kW) • How power factor (0.8) changes the indicated power on a kW meter

💭 Think About

• Start by finding the total three-phase apparent power using line voltage and line current, then apply the correct three-phase factor • Ask yourself: does the kW meter read kVA or only the real power component? How does power factor enter the formula? • Check whether the given 450 volts is line voltage or phase voltage for a three-phase alternator, and which one belongs in the standard formula

✅ Before You Answer

• Use the correct three‑phase power formula: do you include $\sqrt{3}$ with the given line voltage and current? • Be sure to multiply by power factor (0.8) at the correct step to go from kVA to kW • Convert your final result to kilowatts and compare carefully with the closest answer choice