HP ESP120 48V (51.4V) 57A 3KW Server Supply Thread

[ZOMGVTEK]

I only used that connector on the ESP120, since I wasn't sure what I wanted to do with it. For the ESP135's I bent the pins together and soldered them. No need for a plug, why would I want to turn it off? I just plug it in when I want it on, an its on. To turn it off, you remove the power plug...

Here is what they look like...





I just bent the 3 pins together, lightly soldered them, and covered it in glue.

[Kin]

It sounds very foolish, but I can't find a datasheet on this. So i'm not sure how to interpret the lights on the front.

When I short the three pins to activate "on" I get the green power light to be on, but I have a blinking yellow information triangle light. When I don't short them, I have a blinking green light.

In neither case do I get DC output.


Anyone know what's going on? This refers to the ESP120 (51.4v 57A), running off 208VAC (don't ask me, I don't understand how phase 1 is 110v and phase two is 112v and we get 208v when we combine them. But thats because I don't understand the basics of real-word electricals.)

Edit: I found the short datasheet again, http://www.rcgroups.com/forums/showthread.php?t=1625284, but didn't find useful information about the lights in it.

[hillzofvalp]

I wish Luke would chime in on his efforts with this thing..

check out this guy:
http://www.ebay.com/itm/HP-74840-001-Po ... 320wt_1299

[Kin]

That ebay one looks like just 6 of these in a case? I suppose that is itself kind of interesting.

I'm wondering if anyone has useful information about the yellow information triangle dot led on the front. I really wish I could understand why mine isn't putting out DC output. There's a marked high pitch change in the PS when I short the three pins, and the yellow triangle led starts blinking. So at some step things are being repressed, I just wonder which. Something is happening, though.

I might fiddle around a bit more. I'm not really getting anywhere though, my german isn't good enough to read the only source that seems to have deeply analyzed this PS (There's a google group from a german group that did a lot of work with this...even building a board that automatically shuts it off at a certain voltage [for charging RC batteries] and it adjusts the voltage. Several ES members were talking about doing that and if someone could just figure out what the german guys did, it might save a lot of work.)

[Kin]

I'm not sure if I should be reposting what I posted to another thread, but this would be the more on-topic location to post it, although it was my secondary location I thought of.

Anyway, I thought I would post two links from the german guys who worked on the ESP120.

Essentially they made a holy grail system for the ESP120....28v-60v, 0-57A....That's pretty awesome, even if the accuracy is only rough.

http://translate.google.com/translate?h ... md%3Dimvns

http://www.lifepohandel.de/epages/63129 ... %20V2.2%22

[hillzofvalp]

that is super interesting.. I want to put a pair of these on my motorcycle for 1/2 hour recharges. Let me know when you actually get two working in series!

[hillzofvalp]

I just found a thread on lowering the voltage down to like 44V if needed. I think a digital pot, shutn and arduino would easily make this work well. Thinking about buying a couple since they are so cheap.

http://www.rcgroups.com/forums/showthread.php?t=1823759