Electronics > Beginners
How to wire up a 240VAC receptacle
Monkeh:
--- Quote from: Spork Schivago on May 18, 2018, 04:44:33 am ---You still don't get it. We still have other equipment that requires 1-phase 240VAC, unless the technicians lied about that as well. The people I talked to tonight was to _verify_ the information. Pre-Sales is a hell of a lot different than post-sales. Post sales are the REAL HP technicians that are actually building the units
--- End quote ---
Building = slotting them together like Lego.
--- Quote ---If you feel there isn't a difference between enterprise grade and consumer grade equipment, I'm sorry, but you're just wrong.
--- End quote ---
In terms of how a power supply is designed and functions.. no, there really isn't a difference. You can throw around buzzwords and price tags all you like, the power supplies for those servers work just like any other.
--- Quote ---You were the one who posted the datacenter pics with the three-phase, weren't you?
--- End quote ---
No.
--- Quote ---When I said fancy features, I meant HPE Power Discovery Services (PDS) combines the HPE Intelligent Power Distribution Unit (iPDU) and HPE Flex Slot Platinum Plus power supplies with HPE Insight Control software to create an automated, energy-aware network between IT systems and facilities.
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Some simple firmware and a lot of marketing speak. Nothing to do with how the input is handled.
--- Quote from: Spork Schivago on May 18, 2018, 04:51:48 am ---I need true 240VAC 1-phase
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Everyone can agree on this. And we can also all agree.. you have true 240VAC single-phase. It happens to have a centre tap making it split-phase distribution which is messing you (and the 'technicians' at HPE) up.
--- Quote from: Bratster on May 18, 2018, 08:12:21 am ---Whether we like it or not you need a 240-volt line to neutral power service.
--- End quote ---
No he doesn't. He needs a PDU capable of safely distributing his centre-tapped 240V phase, rather than a huge lump of iron hanging on his wall.
Bratster:
--- Quote from: Monkeh on May 18, 2018, 11:48:42 am ---
--- Quote from: Spork Schivago on May 18, 2018, 04:44:33 am ---You still don't get it. We still have other equipment that requires 1-phase 240VAC, unless the technicians lied about that as well. The people I talked to tonight was to _verify_ the information. Pre-Sales is a hell of a lot different than post-sales. Post sales are the REAL HP technicians that are actually building the units
--- End quote ---
Building = slotting them together like Lego.
--- Quote ---If you feel there isn't a difference between enterprise grade and consumer grade equipment, I'm sorry, but you're just wrong.
--- End quote ---
In terms of how a power supply is designed and functions.. no, there really isn't a difference. You can throw around buzzwords and price tags all you like, the power supplies for those servers work just like any other.
--- Quote ---You were the one who posted the datacenter pics with the three-phase, weren't you?
--- End quote ---
No.
--- Quote ---When I said fancy features, I meant HPE Power Discovery Services (PDS) combines the HPE Intelligent Power Distribution Unit (iPDU) and HPE Flex Slot Platinum Plus power supplies with HPE Insight Control software to create an automated, energy-aware network between IT systems and facilities.
--- End quote ---
--- Quote from: Spork Schivago on May 18, 2018, 04:51:48 am ---I need true 240VAC 1-phase
--- End quote ---
--- Quote from: Bratster on May 18, 2018, 08:12:21 am ---Whether we like it or not you need a 240-volt line to neutral power service.
--- End quote ---
No he doesn't. He needs a PDU capable of safely distributing his centre-tapped 240V phase, rather than a huge lump of iron hanging on his wall.
--- End quote ---
Except he has already stated that he wants to use the equipment that he has...
So the only way for that power distribution unit to work correctly/safely is to have the correct power source coming into it.
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Monkeh:
--- Quote from: Bratster on May 18, 2018, 03:39:37 pm ---Except he has already stated that he wants to use the equipment that he has...
So the only way for that power distribution unit to work correctly/safely is to have the correct power source coming into it.
--- End quote ---
He doesn't need to have a grounded pole service. He might want to, but what he needs to do is get the right PDU and not burn money on a hunk of self heating iron.
Spork Schivago:
--- Quote from: IanB on May 18, 2018, 05:01:00 am ---
--- Quote from: Spork Schivago on May 18, 2018, 04:44:33 am ---So before you leave, can you go over this PFC Controller a bit more? How do people get 380VDC ran into their house / building
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(they don't...)
--- Quote ---, and why is it rectified and boosted to such a high voltage? The output of the PSU is 12VDC. Where does the 380VDC come into play?
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The 380 V DC is apparently a standard found in commercial data centers. The 380 V DC is created inside the building from the normal AC supply, it is not brought in from outside.
As to why it would be used, this is about how power supplies work. In order to get the 12 V DC, a power supply first rectifies the AC into high voltage DC, and then special electronics take the high voltage DC and convert it down to the 12 V. Instead of each power supply individually rectifying the AC, it is more efficient to have a single giant rectifier somewhere in the building and then distribute this around to all the servers.
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I understand the need to rectify it in a PSU, but what I don't understand is why we simply cannot go directly to 12VDC. Why is there a need to go to 380VDC first, and then use something like a step-down transformer or bridge rectifier to break it down even further? Is that just to make it more clean? Surely going from 380VDC to 12VDC would give us more current, right? But going from 120VAC directly to 12VDC should allow us to draw equally as much current I'd think as going from 120VDC to 380VDC to 12VDC. If anything, we'd have a little less current draw available because of the components voltage drops and their current draw, but I don't think that would be a lot, maybe I'm wrong.
Spork Schivago:
--- Quote from: IanB on May 18, 2018, 05:03:56 am ---
--- Quote from: Spork Schivago on May 18, 2018, 04:51:48 am ---I got hurt in the Marine Corps. It caused some brain damage. My brain doesn't work the same way as other people, so it's hard to word things properly or talk properly sometimes and I cannot get the right words out, no matter how much I try. This makes it frustrating and people always think I'm being an ass, but I'm not trying to be, I'm just trying to explain it the best I can.
--- End quote ---
Don't worry about it. There's nothing wrong with what you've been saying, it's just that what you are doing is so far outside normal expectations that people are having trouble understanding. People don't normally try to set up a commercial data center in their basement.
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Yes, I know. And I should have just used the word datacenter instead of basement. The goal is to generate enough revenue that we can rent a proper building and create a proper datacenter, but until then, we have to make do with what we have.
For what it's worth, before anyone asks, we have already okayed this with the city. Originally, we were trying to purchase a house that was in the commercial zoning district, but two other people were already on it, and the crappy realtor we had suggested we highball them for more money than what we felt comfortable for. The outside, they had redone and it looked gorgeous (the sellers), however, they appeared to run out of money and never got a chance to do the inside, which still had knob and tube wiring, fuses instead of breakers, lathe and plaster instead of drywall, and we decided to look elsewares. We contacted the city and asked about running a business of this type in a residential zone.
It's allowed, so long as we follow all the rules, and we cannot advertise like you would if it was zoned commercially. What I mean by that, we can put a small sign in the yard or in the window, but we can't have neon lights and big signs, etc. We can't have a docking port for big rigs or any of that, but with the business we're doing, we aren't targeting the residential sector, so this isn't a big problem for us, minus trying to get help on forums when it comes to things like this thread.
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