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Calculates voltage loss in electrical cables due to resistance. High losses reduce efficiency and can prevent motor starting.
Công thức
Formula: voltage drop = (2 × length × current × resistance) ÷ 1000
Hướng dẫn từng bước
- 1Current in amperes and cable length
- 2Wire gauge (affects resistance)
- 3Formula: voltage drop = (2 × length × current × resistance) ÷ 1000
- 4Typical target <3% for power, <5% for control
- 5Higher gauge wire reduces drop exponentially
Ví dụ có lời giải
đầu vào
100A, 50ft, 10 AWG
Kết quả
3.2V drop
Lỗi thường gặp cần tránh
- ✕Using undersized wire to save cost
- ✕Not accounting for temperature derating
Câu hỏi thường gặp
Why does voltage drop matter?
Reduces equipment voltage, increases losses, causes motors to start slowly, reduces efficiency.
How much does proper wire size cost vs. undersized?
Proper size costs 10-20% more initially but saves 5-10% energy costs over life.
Sẵn sàng để tính toán? Dùng thử Máy tính Cable Voltage Drop2 miễn phí
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