Help on power source to run mining rig - 480V, 60 Hz 3-Phase power

[VentMine]

Hello guys and gals,

I am looking into the feasibility of a mining rig and need to understand what I'd be looking at for capital costs. The primary question I have is how could I best use my power source of 480V, 3-phase AC, 60 Hz to run Antminer S9 or S7's? The total wattage for the rig will be somewhere between 50 - 105 kW. Obviously I need to transform the power to run the PSU's, but what would be the most cost efficient way of doing this?

Also do I have to buy one Bitmain APW5 power supply for every single S9 or S7 unit? Is there a more cost efficient way to power the miners, like a larger power supply that can hook up to dozens of miners?

Thanks

PS - I am a mechanical engineer and have no experience in designing power systems :s

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[HagssFIN]

Well that power source is a tricky one.
480 V is your phase-to-phase voltage.
480 V divided with square root 3 equals your phase to neutral voltage, about 277 V.

Now most ATX PSU's have a spec for max 240 V.
IBM 2880W Bladecenter H server PSU has a spec for max 240 V.
Bitmain APW3 has a spec for max 264 V.
Bitmain APW5 has a spec for max 265 V.

You would need some equipment feeding the PSU's with proper voltage or find some PSU's that are ok for higher voltage (I personally don't remember seen any so that I could mention one here).


And are you sure it's 480 V for real and not for example 400 V phase-to-phase voltage?

[VentMine]

Hi HagsFinn,

Yup its 480 V. Specifically, I am considering purchasing a natural gas genset which specs are 105 kW, 3-phase 480V. I have a line on a pretty good deal for it or a smaller unit.

Would I be looking at some sort of transformer to reduce the voltage? Also, considering it is a genset, I am wondering if power quality should be a concern.
THX

[HagssFIN]

You need a professional to help you out.

[QuintLeo]

Get a professional electrician to talk to you about how to split that sort of 3-phase to 220 spilt-phase (most commonly involves a transformer or three).

 genset power quality at that level of genset should not be an issue.

[VentMine]

Will do thanks guys