Kalkulator Penurunan Tegangan
Calculate voltage drop, wire size, maximum current, and wire length for DC, single-phase, and three-phase circuits.
Your Input
Select a calculation type, enter your circuit parameters, then click Calculate to see voltage drop, wire size, max current, or max length with step-by-step solution.
Solusi Langkah demi Langkah
Panduan Pengguna Lengkap
Apa itu Penurunan Tegangan?
Voltage drop is the reduction in voltage in an electrical circuit due to the resistance of the conductors. It's important to keep voltage drop within acceptable limits to ensure proper equipment operation. The NEC recommends no more than 3% for branch circuits and 5% for combined feeder and branch circuits.
Key Formulas
DC: VD = I × R × 2
AC Satu Fasa: VD = I × R × 2 × PF
AC Tiga Fasa: VD = I × R × √3 × PF
Perlawanan: R = (ρ × L) / A
4 Calculation Types
Penurunan Tegangan
Calculate voltage loss in a circuit from current, wire size, and length.
Wire Size
Temukan ukuran kabel AWG minimum untuk target penurunan tegangan maksimum.
Arus Maksimum
Calculate the maximum current you can draw within a voltage drop limit.
Maximum Length
Hitung panjang kabel maksimum dalam batas penurunan tegangan.
Cara Menggunakan
- Select a calculation type (Voltage Drop, Wire Size, Max Current, or Max Length).
- Masukkan parameter rangkaian: tegangan, arus, panjang kawat, ukuran kawat, dan material.
- Pilih jenis rangkaian (DC, AC Satu Fasa, atau AC Tiga Fasa).
- Click Calculate to get results with step-by-step NEC-compliant solutions.
Bahan Kawat
Tembaga: Resistansi lebih rendah (12,9 Ω-cmil/ft), biaya lebih tinggi — standar untuk kabel perumahan.
Aluminium: Resistansi lebih tinggi (21,2 Ω-cmil/ft), biaya lebih rendah — umum terjadi pada pengumpan besar.
Catatan Penting
- NEC merekomendasikan penurunan ≤ 3% untuk sirkuit cabang, ≤ 5% total.
- Voltage drop increases with wire length and current.
- Larger wire sizes (lower AWG number) reduce voltage drop.
- Always follow local electrical codes and consider temperature derating.