Electronics > Beginners
How to wire up a 240VAC receptacle
Spork Schivago:
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, the ones that my VAR deals with.
My VAR is a large VAR. They have Microsoft people in the building, they have HPE technicians in the building, building HPE stuff, they have Lenevo people in the building. These people are paid by HPE, Lenevo, etc. I can have my Account Executive double check with the actual technicians that build the actual devices and have him tell me, once again, that it'll only run on 1-phase 240VAC. I dunno why they did that.
If you feel there isn't a difference between enterprise grade and consumer grade equipment, I'm sorry, but you're just wrong. With your datacenter, would you go buy a Vizio router for the gateway? I highly doubt it. You were the one who posted the datacenter pics with the three-phase, weren't you? I would think out of everyone, you'd understand the most that most of the equipment you purchased is designed to run off 3-phase, not split phase or any of that shit. Same with mine. But you're right, going around in circles. I'm still not 100% clear on how to wire the AC into the transformer.
Once again though, I will state, I am still getting a professional to go over the results before I hook anything up. I'm not an idiot, and only an idiot would try to hook a transformer like this up without having any knowledge of how it works without seeking professional help first. I've been saying that this whole time. I just want to be the one who physically does the work and learns how it works (the transformer). I've learned a lot from you guys since I posted.
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.
I could not go for the HPE Intelligent Power Distribution Unit. So I cannot use that feature. However, there's extra stuff near the adapter plugin that interacts with the iPDUs and sends information over the network and everything.
So before you leave, can you go over this PFC Controller a bit more? How do people get 380VDC ran into their house / building, 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?
Thanks.
IanB:
--- Quote from: Monkeh on May 18, 2018, 03:52:21 am ---Change your PDUs for the type with double pole breakers and use your existing supply, or have an electrician (yes. really. please don't do it yourself.) install the transformer. Either will work.
--- End quote ---
It's not clear that there are any HPE PDUs with double pole breakers. The HPE literature divides the product range into two categories: NA/Japan which expects 200-208 V AC single phase, or INTL which expects 220-240 V AC single phase. In either case it is clear that this voltage is measured line to neutral, as is typically found in commercial premises.
Spork Schivago:
--- Quote from: IanB on May 18, 2018, 04:38:29 am ---
--- Quote from: Spork Schivago on May 18, 2018, 03:27:50 am ---It's fancy and supports other features as well, and maybe that's why split-phase won't work? They're HPE's Flex Slot Platinum Plus Hot Plug, 1400 watt, part number: 720620-B21
--- End quote ---
OK, I did some reading around the HPE document library and the situation is clearer now.
This equipment is certainly intended for installation in commercial data centers and is not meant to see a home environment.
HP expects commercial power to be available in North America in two flavors of single phase: either 120 V AC ("low-line") or 208 V AC ("high-line"). The 208 V power would be derived from one leg of a three phase transformer and would be true 208-0 V single phase line to neutral.
HP does not expect 240 V AC single phase to be available in North America and their PDUs designated for the NA market are not specified this way. Their NA PDUs are specified for 200-208 V AC single phase input.
(Various flavors of three phase AC are also supported but they are not relevant here.)
The actual PSUs such as the HPE 1400W Flex Slot Platinum Plus Hot Plug Power Supply (720620-B21) that you quoted simply say "200-240 V, 50/60 Hz". There's nothing to indicate that the 240 V can't be derived from a split phase supply, but the split phase supply wouldn't be compatible with the PDU or the intelligent power management services.
So, in summary, what you have been told is correct. Your system needs a true 200-240 V AC single phase supply such as would be found in a commercial facility where it would come from one leg of a three phase utility transformer as 208 V AC. Since this is not available to you, you do indeed need a transformer to convert 240 V split phase to 240 V single phase line to neutral.
Overall, your whole setup would work better in a commercial building.
--- End quote ---
THANK YOU!!!! That's what I've been trying to say! I didn't know I'd have to go into sooooo much detail to get people to understand. Yes, this equipment is designed for a COMMERCIAL building, not HOME!!! But the problem is getting 208VAC to our house. That's just as expensive as any of the other 3-phase, hence the reason we had to go with the 240VAC European factor. Normally, a commercial facility would have 3-phase. It's that iPDU stuff, I believe, that makes this PSU NOT boot up with split-phase, despite what other people say. It gets frustrating repeating myself, but thank you for doing the research! 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.
But it's weird, although I can't tell people how to do certain things or remember, I can still do them very well, much better than before, like programming. I don't know how. The memory specialist doc I saw said it's like losing a sense, the other senses tend to get better. Part of my brain don't work right or at all, so he thinks other parts work better I guess.
Anyway, now that we finally got that out of the way and almost everyone can agree that I need true 240VAC 1-phase, can we get back to the transformer issue? I'm still having a hard time understanding it. Do you guys have any good documents that break down how they work and what taps are and stuff like that?
Spork Schivago:
--- Quote from: IanB on May 18, 2018, 04:51:11 am ---
--- Quote from: Monkeh on May 18, 2018, 03:52:21 am ---Change your PDUs for the type with double pole breakers and use your existing supply, or have an electrician (yes. really. please don't do it yourself.) install the transformer. Either will work.
--- End quote ---
It's not clear that there are any HPE PDUs with double pole breakers. The HPE literature divides the product range into two categories: NA/Japan which expects 200-208 V AC single phase, or INTL which expects 220-240 V AC single phase. In either case it is clear that this voltage is measured line to neutral, as is typically found in commercial premises.
--- End quote ---
Yes, hence the reason we could ONLY go for the 240VAC PDU! The 3-phase is too expensive. I mentioned that early on, but maybe my message wasn't clear? I said most of the equipment is for 3-phase, but after talking to the electricity company and the professional licensed electrician, we could not afford it. So we had to go with the 240VAC one. I was saying the Enterprise grade stuff is not like the residential stuff. But for some reason, people just don't understand that. Thank you for helping me word things correctly!
IanB:
--- 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
--- End quote ---
(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?
--- End quote ---
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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