Phase Current Calculator
Calculate phase current in single-phase and three-phase systems. Input voltage, power, and power factor to determine accurate current for load analysis.
Phase Current Calculator:
Phase current is the current flowing through each phase of a single-phase or three-phase electrical system. The Phase Current Calculator computes it using voltage, power, and power factor. Enter system parameters, and the calculator provides phase current values for load analysis, conductor sizing, and protective device selection.
Phase Current Tools formula
The Phase Current Calculator determines the current flowing in each phase of single-phase and three-phase electrical
systems based on voltage, total power, and power factor.
For single-phase circuits, the formula is:
\[ I = \frac{P}{V \times PF} \]
For three-phase systems, the formula is:
\[ I_{phase} = \frac{P}{\sqrt{3} \times V \times PF} \]
where I is the phase current in amperes (A), P is power in watts (W), V is line voltage in volts (V), and PF is power factor.
This tool is essential for electrical engineers, students, and electricians to size conductors, select protective devices, and analyze loads accurately. By entering voltage, total power, and power factor, the calculator quickly provides phase current values for both AC single-phase and three-phase systems, ensuring efficient and safe circuit design.
Work & Installation — Input to Output Summary
Work:
- Computes phase current in single-phase and three-phase systems.
- Supports AC circuits with any power factor.
- Useful for load calculation, conductor sizing, and safety analysis.
Installation:
- Add HTML input fields for voltage, power, and power factor.
- Use JavaScript formulas:
Single-phase: I = P / (V × PF)
Three-phase: I_phase = P / (√3 × V × PF) - Display output in amperes (A).
Input:
- Total Power (P, W)
- Voltage (V, volts)
- Power Factor (PF, decimal or %)
- Circuit Type: Single-phase / Three-phase
- Phase Current (I, A)
Testing and Final Adjustments
Test with sample circuits: single-phase 230 V, 2300 W, PF = 0.8 → I ≈ 12.5 A; three-phase 400 V, 10 kW, PF = 0.9 → I_phase ≈ 16 A. Validate handling of voltage, power, and PF input units. Ensure proper calculation for decimal and percentage PF inputs. Add input validation to prevent zero or negative values. Include real-time calculation and responsive design for desktop and mobile. Optionally, show line current vs phase current distinction for clarity. Round output appropriately and confirm results with standard electrical formulas. Once verified, finalize layout, tooltips, and unit handling for professional and educational purposes.
Frequently Asked Questions - Phase Current Calculator:
What is phase current?
Phase current is the current flowing through each phase in a single-phase or three-phase electrical system.
How do you calculate phase current in single-phase?
I = P / (V × PF), where P is power, V is voltage, and PF is power factor.
How do you calculate phase current in three-phase?
I_phase = P / (√3 × V_line × PF), where P is power, V_line is line voltage, and PF is power factor.
What units are used for phase current?
Phase current is measured in amperes (A).
What is power factor?
Power factor is the ratio of real power to apparent power in an AC circuit.
Can this calculator be used for DC circuits?
For DC circuits, PF = 1, and phase current equals line current.
Why is phase current important?
It is used for sizing conductors, selecting protective devices, and analyzing electrical loads.
What if the voltage is too low?
The phase current will increase, potentially overloading the conductor if not sized correctly.
Is this calculator suitable for industrial systems?
Yes, it works for residential, commercial, and industrial AC systems.
Can it handle both line-to-line and line-to-neutral voltage?
Yes, input the correct voltage for single-phase or three-phase calculations to get accurate phase current.
