Neutral 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

Maximum short-circuit current

Calculates the minimum short-circuit current at the end of a low-voltage circuit, used to verify protective device sensitivity. Supports: Single-phase, two-phase, three-phase systems Copper/Aluminum conductors mm²/AWG units m/ft/yd length units Parallel conductors Key Formula I_sc,min = U / (√3 × (R_L + X_L)) Where: U: System voltage R_L: Line resistance X_L: Line reactance Example Current type: Three-phase Voltage: 400 V Length: 50 m Conductor: Copper, 16 mm² → Minimum short-circuit current ≈ 8.5 kA

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