Topic: 3-phase power or Single phase to a power supply? Does it matter? (Read 785 times)
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.
February 05, 2017, 11:59:03 PM
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.
February 04, 2017, 10:46:05 AM
Right on, I understand. Yes agree my question was worded poorly due to my own confusion. Thanks
February 03, 2017, 08:38:04 PM
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.
But the part about any AC over 200V is right, so pulling 208V from a three-phase installation works just fine.
February 03, 2017, 06:39:26 PM
single phase or 3 phase will work just fine, the voltage just needs to be over 200 for that power supply 
February 03, 2017, 02:35:36 PM
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.
February 03, 2017, 02:33:23 PM
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
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
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