PRELIMINARY ENGINEERING TOOL
Line and phase voltage & current calculator
Convert balanced star/delta line and winding quantities. A phase winding is not always connected to neutral.
Inputs
Calculation steps
Vphase = 415 ÷ √3 = 239.6003617136947
Formula ID: LINE_PHASE_BALANCED_V1
Assumptions and references
Balanced sinusoidal steady state. In star: Vline = √3 × Vphase and Iline = Iphase. In delta: Vline = Vphase and Iline = √3 × Iphase. Neutral voltage is defined only where a neutral exists.
Read the relationships and limitations →UNDERSTAND THE TOOL
What this calculator does
Translate between supply line quantities and individual load-branch quantities in a balanced sinusoidal system.
How to use it
- Choose star or delta from known equipment information.
- Choose voltage or current and conversion direction.
- Enter the known magnitude.
- Review the result, connection diagram and balanced-system limitation.
Fields and meanings
- Connection
- Star or delta load arrangement; this tool does not select a motor connection.
- Quantity
- Voltage in volts or current in amperes.
- Direction
- Convert a line magnitude to phase magnitude, or reverse.
- Known value
- A finite nonnegative RMS magnitude for the selected quantity.
Review required. Phase voltage means voltage across a load branch. Delta does not imply a neutral. Starting, unbalance and harmonics are outside this model.
Read the full explanation →