Question 219Electricity/Electronics - QMED70% to pass
A three-phase alternator operates at 450 volts with a 0.8 power factor. If the ammeter indicates 250 amperes, what should be the kW meter reading?
AI Explanation
The correct answer is C) 155.70 kW.
To calculate the kW meter reading, we need to use the formula: kW = √3 × V × I × PF, where V is the voltage, I is the current, and PF is the power factor.
Given the information:
- Voltage: 450 volts
- Current: 250 amperes
- Power factor: 0.8
Plugging these values into the formula:
kW = √3 × 450 × 250 × 0.8
kW = 155.70 kW
The other options are incorrect because they do not correctly apply the formula to the given information.
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