정답: 1번

전등: \(100 \, \text{W} \times 100 = 10,000 \, \text{W} = 10 \, \text{kW}\)

전열: \(3 \, \text{kW} \times 5 = 15 \, \text{kW}\)

소형전기기구: \(200 \, \text{W} \times 20 = 4,000 \, \text{W} = 4 \, \text{kW}\)

동력: \(5 \, \text{kW} \times 5 = 25 \, \text{kW}\)

총 설비용량: \(10 + 15 + 4 + 25 = 54 \, \text{kW}\)