I found the following on the Phihong website (they manufacturer a high proportion of the worlds switching power supplies):
AC Input Frequency – The nominal range of 47 to 63 Hz is important in linear power supplies, but most switchers are insensitive to input frequency and can operate from DC to 400Hz. This is especially important in countries where the power may be of poor quality.
(Ref:
Technical Glossary)
So long as the device you are connecting has a supply that states it will take 110-240V (without you having to select anything) then you can pretty safely assume it is a switching supply and will work on connected to a 115V/400Hz source.
- GY