Need Rectifier Recommendation

[Ehren8879]

We're proposing a deployment of carrier backhaul chassis that only come in a -48VDC option. The chassis has side A and B input and can alert power failure on either side.

That being said I have next to no experience with rectifiers, but I sort of know what I want.

My director originally spec'd the following Newmar shelf:

http://www.newmartelecom.com/Unity-Rectifier-System/Unity-Rectifier-System.html

I like that it supports a third module for active failover, but the modules connect in parallel to the fuse block, so side A and B output are not tied to separate modules. Therefore if a module fails in the field we have no way of knowing without putting eyes on the install. Also I'd have to supply a separate UPS for backup which I'd prefer to have an all-in-one solution and not rely on another unit.

Having separate side A and B output power isn't as important as a good rectifier, built-in UPS in a 2U form factor and bypass option for swapping batteries. I'll consider all options.

Here's an example of a shelf I'm looking at. The downside is there's only one set of outputs on the rear:

http://www.newmartelecom.com/IPS/IPS.html

Any help from those with experience would be greatly appreciated.

Edit: Input power is 120VAC, Output amps up to ~5

 

[Mchart]

I prefer Eaton's systems due to their high modularity and stellar service options.

You didn't really indicate how much amperage you are shooting for, but http://dcpower.eaton.com/3g/EPS2-Series.asp is similar to the Newmar gear you've shown here. Note the the matching battery backup modules for said unit.

Edit - You need 5 amps, so hardly much at all. So the above shelf with two of these http://dcpower.eaton.com/3G/EPR48-info.asp You really only need one, but throwing in two gives you the redundancy at least.

The Newmar setup will end up being cheaper, but lacks the remote management / monitoring capabilities, and efficiency that Eaton systems usually provide.

You won't have *true* redundancy with either self contained system on your actual gear. That being said either setup from either company has built in redundancy with the actual rectifier modules so I wouldn't worry about it.

 

[Ehren8879]

Thanks for the Eaton recommendation. I'll take a look at their offerings.

I'm going to evaluate our space requirements to see if we can squeeze in an extra rack unit or two.

 

[Red Squirrel]

At our COs we use mostly Cordex/Argus system, think it's made by Alpha.

Though I'd be curious to see what else is recommended in this thread, as I can't seem to find anywhere online to buy -48vdc rectifier systems, I'd like a small chassis at home, with like 3kw capacity or so. No idea how it would even cost. No sites seems to want to show prices and offer a add to cart option.