yochdog



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LegendaryActivity: 2044Merit: 1000 .05 BTC bounty - act now! December 29, 2014, 07:09:34 PM #1



First person to tell me (correctly) how many watts this PDU can supply to mining equipment, wins the bounty:



http://www.ebay.com/itm/PDI-PDU-100-KVA-480v-x-208v-3-Panel-Manuifactured-2009-/121527983792?pt=US_Uninterruptible_Power_Supplies&hash=item1c4ba1deb0



I am not that good when it comes to electrical matters.First person to tell me (correctly) how many watts this PDU can supply to mining equipment, wins the bounty: I am a trusted trader! Ask Inaba, Luo Demin, Vanderbleek, Sannyasi, Episking, Miner99er, Isepick, Amazingrando, Cablez, ColdHardMetal, Dextryn, MB300sd, Robocoder, gnar1ta$ and many others!

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ASICSPACE



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Full MemberActivity: 121Merit: 100Feel free to contact me via email, skype or phone! Re: .05 BTC bounty - act now! December 29, 2014, 07:11:25 PM

Last edit: January 01, 2015, 01:59:10 AM by ASICSPACE #2



KVA is "apparent power" while KW is real power. Apparent power is what you would get in a perfect world with no lagging reactive power due to the transformer.



Check out this link:



We're not using PDUs in our data center, just transformer + panels. We have some pics on our website: It's a 100 KVA which means 100KW. A little less actually because the transformer inside doesn't have a perfect power factor.KVA is "apparent power" while KW is real power. Apparent power is what you would get in a perfect world with no lagging reactive power due to the transformer.Check out this link: http://www.apcmedia.com/salestools/SADE-5TNQYF/SADE-5TNQYF_R1_EN.pdf?sdirect=true We're not using PDUs in our data center, just transformer + panels. We have some pics on our website: http://www.asicspace.com/ ★★★★ Bitcoin Miner Hosting! ★★★★ $55/kw-month ★★★★ http://www.asicspace.com/ ★★ Best Prices in the hosting Industry! ★★★★

gdale



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NewbieActivity: 42Merit: 0 Re: .05 BTC bounty - act now! December 30, 2014, 05:57:50 AM #14

http://www.rapidtables.com/calc/electric/power-calculator.htm



put in the volts output of 208 and amps max is the main breaker of 225amps

hope this helps



edit its not 3 phase as no power factor is listed in spec okay its out is this 225amp max at a 208volt's max this is because of 225 Amp Main Breaker this puts it at 46.8 kw's here is a calc for itput in the volts output of 208 and amps max is the main breaker of 225ampshope this helpsedit its not 3 phase as no power factor is listed in spec

ASICSPACE



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Full MemberActivity: 121Merit: 100Feel free to contact me via email, skype or phone! Re: .05 BTC bounty - act now! December 30, 2014, 04:26:05 PM #16 Quote from: gdale on December 30, 2014, 05:57:50 AM

http://www.rapidtables.com/calc/electric/power-calculator.htm



put in the volts output of 208 and amps max is the main breaker of 225amps

hope this helps



edit its not 3 phase as no power factor is listed in spec

okay its out is this 225amp max at a 208volt's max this is because of 225 Amp Main Breaker this puts it at 46.8 kw's here is a calc for itput in the volts output of 208 and amps max is the main breaker of 225ampshope this helpsedit its not 3 phase as no power factor is listed in spec

First of all you can tell there's a 480/277 to 208/120 transformer in here because those are the voltages listed in the listing, which clearly indicates three phase power because 208 is the line to line voltage between two of the phases and 120 is the line to neutral voltage between a phase and the neutral.



Also you multiplied the output line to line voltage by the input current, incorrectly. After the current passes through the transformer it will will increase (as indicated in the listing) because a transformer will change the voltage, and the current, but the power remains the same. P = (V1 x I1) = (V2 x I2). First of all you can tell there's a 480/277 to 208/120 transformer in here because those are the voltages listed in the listing, which clearly indicates three phase power because 208 is the line to line voltage between two of the phases and 120 is the line to neutral voltage between a phase and the neutral.Also you multiplied the output line to line voltage by the input current, incorrectly. After the current passes through the transformer it will will increase (as indicated in the listing) because a transformer will change the voltage, and the current, but the power remains the same. P = (V1 x I1) = (V2 x I2). ★★★★ Bitcoin Miner Hosting! ★★★★ $55/kw-month ★★★★ http://www.asicspace.com/ ★★ Best Prices in the hosting Industry! ★★★★