3-phase power or Single phase to a power supply? Does it matter?

[VentMine]

I'm a dummy and want to understand if the power input to a power supply, such as the Bitmain's APW3+ PSU, requires single phase AC or can it be 3 Phase AC?

Spec's on Bitmains website:

Input Voltage Range   176-264V AC
Starting Voltage   200-205V AC
Frequency Range   47-63Hz
...

Can I supply 208V-3PH supply to this PSU or must it be single phase at the appropriate voltage?

Cheers

[1714007879]

1714007879

[1714007879]

1714007879

[sidehack]

The PSU will only take in a single hot line. If you span two legs of a 3-phase system for 208V it works just fine. My entire hosting is set up like that.

[Colohub]

single phase or 3 phase will work just fine, the voltage just needs to be over 200 for that power supply

[sidehack]

Technically not a correct answer, since the PSU doesn't accept 3-phase power. Only a single "phase" is used per PSU; whether that's 240V line-line (or, less likely, line-neutral) or 208V line-line is up to the end user's particular implementation. Of course this is based on a strict parsing of the OP's question, which may not read as he intended it to mean.

But the part about any AC over 200V is right, so pulling 208V from a three-phase installation works just fine.

[VentMine]

Right on, I understand. Yes agree my question was worded poorly due to my own confusion. Thanks

[Finksy]

The easiest way to use 3-phase power for PSU's is to use a 3-phase specific PDU's which -as sidehack mentioned- breaks power into 3 pairs of phases to obtain line-line 208V (or whatever voltage your 3P is) + ground single-phase equivalent.  The only important thing to note is that the 3 legs of the PDU (colour-coded for simplicity) need to stay as balanced as possible.

[sidehack]

My hosting is set up with 3phase, where I have pulls from two phases dropped to a two-pole subpanel on each shelf breaking out customer circuits (at 208V). There are current meters on each leg at the junction box so I can keep everything reasonably balanced, also shows me what shelves have available power for new gear. Not fancy at all but works out pretty well.