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

pussyhunter6969

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Quote from: s_falahati on March 08, 2019, 09:26:42 AM

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

s_falahati

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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

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Quote from: fanatic26_ on March 05, 2019, 03:58:32 PM

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

mikeywith

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Quote from: NotFuzzyWarm on March 06, 2019, 09:36:44 AM

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.

NotFuzzyWarm

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Quote from: mikeywith on March 06, 2019, 08:10:01 AM

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

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be constructive or S.T.F.U

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

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^^ 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.

philipma1957

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try larsonelectronics

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

that one is bigger than you may want

fanatic26_

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

pussyhunter6969

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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

Topic: How do you run miners on 440 V/3 Phase ? (Read 202 times)