What is it?

[onanparts]

Up next......and no clues!

Hmmmm...OK, a clue or 2. If you are reading this post in this forum then the name of the manufacturer would be instantly recognizable or at least familiar.

And another pic.....

[mike90045]

Up next......and no clues!

designed to last <10 years.  Really, connection wires bolted to bare aluminum ?  Doesn't look like 4 thermistors there.  That aluminum is going to creep and deform over time, air will get under those ring terminals and oxidize the aluminum. game over.

[onanparts]

Up next......and no clues!

designed to last <10 years.  Really, connection wires bolted to bare aluminum ?  Doesn't look like 4 thermistors there.  That aluminum is going to creep and deform over time, air will get under those ring terminals and oxidize the aluminum. game over.

How do you explain the fact that several units I own made by the same company using identical heatsinks and connections have been trouble free and exibit none of the issues you state?

These units have been in continuous use by me for 11, 14, 17 and 19 years. Each unit has the covers removed for an annual inspection. Dust blown out and all connections checked etc. Not a single bad connection or any corrosion has ever been found.

All have been subjected to numerous thermal cycles and thousands of hours of troublefree service. Less than ten years life? Not even close based on my personal experience and that of many many others.

[boB]

A power supply for you organ ?

[phxmark]

Look like the innards of an uninterpretable power supply or an inverter/charger.

[onanparts]

Look like the innards of an uninterpretable power supply or an inverter/charger.

phxmark wins nothing! 

UPS is it! Made by APC, they were bought out by Schneider Electric back in 2006/2007. APC has been around since 1981. They were founded by 3 MIT Electrical Power Engineers after they ran out of grant funds to do R & D on.....Solar Power! 

While on the grid all of my electronics have an APC Smart UPS between them and the wall outlets. My oldest still in use was made in 1995. Nothing but new batteries every 4-6 years has been required. The majority of mine were made in the late 90's in Rhode Island. 1 or 2 made in the last 10 years are offshore, Philippines.

The one pictured here is a 2008 unit made in India... But considering what I paid, $40 and it works + batts were replaced 2 years ago by the prior owner I can't complain too loud.

Model is a SUA2200RMXL. 2200VA/1980 Watts. 48VDC input with extended run capability using external batts. 120VAC output.

Does not compare to my Radian on any level except weight! Sucker is 130+ pounds with 40 of that the internal battery pack.

But for $40 I'll use it for something.....

[phxmark]

We have a bunch of the 3000XLs in the server racks here where I work.  I thought the innards looked familiar.

[onanparts]

We have a bunch of the 3000XLs in the server racks here where I work.  I thought the innards looked familiar.

Don't happen to have an extra AP9631 Network card laying around do you?....

Mine has the AP9630 with no I/O ports for temp sensor/relay/contacts etc. like the 9631 does.

[phxmark]

We are going to be replacing the UPSs at one of our datacenters with a Symetra this year, so I may be able to dig up a card.

[onanparts]

We are going to be replacing the UPSs at one of our datacenters with a Symetra this year, so I may be able to dig up a card.

OK, sounds good. Thanks for keeping me in mind. 

I went back to where I found the 2200XL to look for a 9631 card but no luck. But.....They had just put out a 3000XL with not 1 but 4 of the external battery packs. Checking the model tag showed it was made here! Rhode Island 2003. Struck a deal for a couple hundred bucks for everything including a step down transformer that was in the stack but from another setup as this 3000XL is 120V in and 120V out.

Batteries are tired as expected. It works fine otherwise except for one issue. Transformer buzz while inverting/on battery. Normal "Hum" that is heard from most if not all inverters/UPS units while inverting but this one is the only unit that has ever produced a sizzling bacon sound. It's not present when charging etc. Only when on battery. Does this with or without a load.

The 2200XL does not sizzle on battery, normal hum yes.

Have you come across this with any of your units? boB feel free to chime in too...

Video of it here: AC plugged and unplugged several times during video. No sizzle when on AC.
https://www.youtube.com/watch?v=LD1g5G4TZDQ&feature=youtu.be

[phxmark]

I had an APC that would buzz real loud when inverting.  We solved it by peeling back the wrapping on the transformer and pouring some thinned lacquer in the windings.  Quieted it right up.

Your sizzling sounds like a small corona arc somewhere. Turn off all the lights and see if you can see any glow.  Can you smell any ozone when it is running?

[onanparts]

No visible arcing/glow or ozone smells.....

[philb]

I had several of the 3000XL units at work. If batteries were not loaded into the bays in the UPS itself, they would sound like an engine about to throw a rod. The best I could find out, the battery housing parts would vibrate at a resonant freq. with the transformers.

The second thing is the transformers as phxmark said. Grainger stocks electric motor lacquer in a spray can.  That worked well, but the high VOC's in the can required proper ventilation.

[onanparts]

This is one of those "what is it for" pics. 

[Westbranch]

DC-DC Converter?