How do you run miners on 440 V/3 Phase ?

[pussyhunter6969]

Hey the problem is i have 440 Volt / 3 Phase

Are there any power supplies ? that power on 440 V i want to power up few antminer s9

[fanatic26_]

You would need a step down transformer to make that happen. there are no PSUs that will work for what you want.

[philipma1957]

try larsonelectronics

https://www.larsonelectronics.com/p-144789-.aspx

that one is bigger than you may want

[NotFuzzyWarm]

^^ is certainly a nice one but the OP should just check local electrical supply companies for one and save a ton on shipping the monsters.

[mikeywith]

If you have 440v on 3phase this means that you already have 240v between every phase and neutral.

Even more good news is, if you have say total 100 amps on 3 phase 440v it means you have a total of 300 amps on single phase 240v

You can use a voltameter and check the voltage , place the black pin on the neutral wire and the red pin on one of the phases and it should read 240v.

[NotFuzzyWarm]

If you have 440v on 3phase this means that you already have 240v between every phase and neutral.

Even more good news is, if you have say total 100 amps on 3 phase 440v it means you have a total of 300 amps on single phase 240v

You can use a voltameter and check the voltage , place the black pin on the neutral wire and the red pin on one of the phases and it should read 240v.

No, 440 line-to-line gives 254.3V line-to-neutral which for most PSU's is above their max Vin rating of 240v.
Line-to-neutral V=440/1.73

As for amps for each phase-to-neutral, It is still only a maximum of 100A per leg but yes, 300A total is possible but only if the loads on all phases are in balance to minimize neutral currents.

ref https://en.wikipedia.org/wiki/Three-phase_electric_power

[mikeywith]

No, 440 line-to-line gives 254.3V line-to-neutral which for most PSU's is above their max Vin rating of 240v.
Line-to-neutral V=440/1.73

As for amps for each phase-to-neutral, It is still only a maximum of 100A per leg but yes, 300A total is possible but only if the loads on all phases are in balance to minimize neutral currents.

ref https://en.wikipedia.org/wiki/Three-phase_electric_power

The calculation is right, if you divide 440 by root 3 you get exactly 254.03V , but i doubt he reads 440v exactly, so there is a good chance he ends up somewhere around 240v, i am not very familiar with the standards in the U.S tho i know the rest of the world uses 380/220v 3/1 phase.

but all that aside, even at 254v he would still be able to run S9s with no problem using APW7 psu from bitmain which has a range of 100v to 264V.

[pussyhunter6969]

You would need a step down transformer to make that happen. there are no PSUs that will work for what you want.

ill see if i find any portable units

[s_falahati]

I just found a PSU supporting both 180v-250v and 264v-380v ranges from a local vendor capable of providing 12v 200a with overcurrent, overvoltage and overheat protection. But it was priced at 600$. So there are PSUs capable of that. But with 600$ you can buy a miner (or up to 3 if you go with used miners) instead of a PSU.

[pussyhunter6969]

I just found a PSU supporting both 180v-250v and 264v-380v ranges from a local vendor capable of providing 12v 200a with overcurrent, overvoltage and overheat protection. But it was priced at 600$. So there are PSUs capable of that. But with 600$ you can buy a miner (or up to 3 if you go with used miners) instead of a PSU.

i got you point but i need to buy a transformer anyways, ill try to find that cheaper