Minimum short-circuit current

Calculate current based on voltage, power, power factor, or impedance. Supports: Single-phase and three-phase systems Active power → current Apparent power → current Resistance/impedance → current Bilingual support Key Formulas Single-phase: I = P / (V × cosφ) Three-phase: I = P / (√3 × V × cosφ) Single-phase: I = S / V Three-phase: I = S / (√3 × V) Single-phase: I = V / R Three-phase: I = V / (√3 × Z) Example Three-phase system, 400V, 10kW, PF=0.85 → Current ≈ 17.5 A

Calculates the neutral current in a three-phase, four-wire system based on phase currents. Supports: Any three-phase current values Real-time neutral current calculation Bilingual support (Chinese/English) Key Formula I_N = √(I_A² + I_B² + I_C² - I_A×I_B - I_B×I_C - I_C×I_A) Where: I_A, I_B, I_C: Phase currents I_N: Neutral current Example Phase A: 10A, Phase B: 10A, Phase C: 5A → Neutral current ≈ 5.0A

Maximum short-circuit current

Calculate the operating current of electrical equipment based on active power, voltage, efficiency, and power factor. Supports: Single-phase and three-phase systems Standard voltages (400V/230V, 690V/400V, etc.) Custom voltage input Adjustable efficiency and power factor Coincidence factor Key Formula I = P / (√3 × V × η × cosφ) Where: P: Active power (kW) V: Line voltage (V) η: Efficiency cosφ: Power factor Example Three-phase system, 400V, 10kW, η=0.9, PF=0.85 → Operating current ≈ 19.5 A