Three-Phase Transformer Calculator

Calculate voltages, currents, and connections for three-phase transformer banks.

Three-phase kVA rating.
kVA
Primary line-to-line voltage.
V
Secondary line-to-line voltage.
V
0 for Wye, 1 for Delta.
0 for Wye, 1 for Delta.

Results

Primary Line Current-A
Secondary Line Current-A
Primary Phase Voltage-V
Secondary Phase Voltage-V
References: Chapman Electric Machinery; IEEE C57.12.00; NEMA TR-1