Maximum short-circuit current

Current Calculator - AC and DC (Volts, Watts, Ohms, Power Factor)

Calculate AC and DC current in amps from voltage, power (watts/kW), power factor, or resistance. Supports single-phase, two-phase (2-wire), three-phase, and Ohm’s Law. Ideal for electrical engineers, electricians, students, and DIY projects. Includes motor load estimation Supported Systems Key Formu

3-Phase Neutral Current Calculator – Unbalanced Load (No Harmonics)

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 A ² + I B ² + I C ² - I A ×I B - I B ×I C - I C ×I A ) Where: I A , I B

Minimum Short-Circuit Current Calculator

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

Operating Current Calculator for AC Systems

Calculate the operating current (I b ) of electrical equipment based on active power, voltage, power factor, and coincidence factor—essential for sizing cables, breakers, and protection devices in AC systems. This tool helps engineers, electricians, and designers determine the actual running current