50 / 60 / 400 Hz Conversion
Present the voltage and frequency a product or a vessel expects, regardless of the local grid.
Frequency conversion on this site lives in two sizes. The HPA family is a laboratory and production AC source (40–499.9 Hz, 0–300 VAC). The shore-power family is a 1000–4000 kVA quay machine whose rated output frequency is 50 Hz, 60 Hz or 400 Hz.
Do not treat those two machines as interchangeable.