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Title: How do you run miners on 440 V/3 Phase ? Post by: pussyhunter6969 on March 05, 2019, 06:37:28 PM 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 Title: Re: How do you run miners on 440 V/3 Phase ? Post by: fanatic26_ on March 05, 2019, 08:58:32 PM You would need a step down transformer to make that happen. there are no PSUs that will work for what you want.
Title: Re: How do you run miners on 440 V/3 Phase ? Post by: philipma1957 on March 05, 2019, 09:25:07 PM try larsonelectronics
https://www.larsonelectronics.com/p-144789-.aspx that one is bigger than you may want Title: Re: How do you run miners on 440 V/3 Phase ? Post by: NotFuzzyWarm on March 05, 2019, 09:35:23 PM ^^ 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.
Title: Re: How do you run miners on 440 V/3 Phase ? Post by: mikeywith on March 06, 2019, 01:10:01 PM 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. Title: Re: How do you run miners on 440 V/3 Phase ? Post by: NotFuzzyWarm on March 06, 2019, 02:36:44 PM 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 Title: Re: How do you run miners on 440 V/3 Phase ? Post by: mikeywith on March 06, 2019, 05:05:42 PM 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. Title: Re: How do you run miners on 440 V/3 Phase ? Post by: pussyhunter6969 on March 06, 2019, 05:47:45 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 Title: Re: How do you run miners on 440 V/3 Phase ? Post by: s_falahati on March 08, 2019, 02:26:42 PM 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.
Title: Re: How do you run miners on 440 V/3 Phase ? Post by: pussyhunter6969 on March 08, 2019, 02:36:33 PM 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 |