🔍 Key Concepts
• Use the three-phase power formula that relates kW, line voltage, current, and power factor.
• Notice from the illustration that each main ship service diesel-generator (SSDG) is rated 2000 kW, 480 VAC, 3-phase, 60 Hz.
• Remember that kW is real power and kVA is apparent power, and they are connected through the power factor (0.8).
💭 Think About
• First convert the 2000 kW rating at 0.8 power factor into kVA. What relationship links kW, kVA, and power factor?
• Once you have kVA, how do you solve for line current (amps) in a 3-phase system given line voltage and apparent power?
• After computing the current, which of the multiple‑choice options is closest to your calculated value?
✅ Before You Answer
• Be sure you are using the 3-phase formula: it should include ( \sqrt{3} ) somewhere.
• Confirm that you use line-to-line voltage (480 V), not line-to-neutral, in your calculation.
• Double-check unit conversions so that kW → W and kVA → VA are handled consistently before calculating amps.