power

Transformer Primary Conductor Size

Computes the minimum conductor size using: A = I / J, where I is the winding current and J is the allowable current density.

Inputs

Current(A)

Winding current in amps

Current Density(A/mm²)

Allowable current density in amps per square millimetre — typical copper transformer winding: 2–4 A/mm²

⚠Current density must be greater than zero

Conductor Size—mm²Required conductor cross-sectional area in square millimetres