How to step down voltage from 208V to 110V

Posted by Eric Dennis on Server Fault See other posts from Server Fault or by Eric Dennis
Published on 2010-07-02T19:23:13Z Indexed on 2012/09/27 15:40 UTC
Read the original article Hit count: 216

Filed under:

Datacenter

|

power

|

pdu

I have some racks that will be fed by 208V/20A circuits. These circuits will be conditioned and battery-backed by the facility in which these racks will live. 99% of the devices in the rack will be able to support 208V input, so I plan to use these PDUs.

However, there may be one or two odd devices that will need 110V input. I know that I can use a step-down transformer to provide 110V for these devices, but that seems like overkill for such a small number of devices, plus I don't want to pay extra for the UPS functionality since my power will already be battery-backed.

Any suggestions for something I can use for these one-off 110V devices?

© Server Fault or respective owner

Related posts about Datacenter

IIS7 failover cluster across datacenters

as seen on Server Fault - Search for 'Server Fault'
Hello, I have servers in two different datacenters with each datacenter getting static IPs. What I would like to do is setup the servers as IIS7 servers and allowing them to failover from datacenter to datacenter with little (or preferably) no interruption. Servers on both sides are running Windows… >>> More
Study: Security Lags in Datacenter Virtualization Projects

as seen on Dot net Slackers - Search for 'Dot net Slackers'
Datacenter virtualization projects can open up security issues, according to research from Gartner....Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here. >>> More
2009 Datacenter Recap, What to Expect in 2010

as seen on Internet.com - Search for 'Internet.com'
Many lessons in managing computer centers the size of a football field were learned this year. How much of that will stick in 2010? >>> More
2009 Datacenter Recap, What to Expect in 2010

as seen on Internet.com - Search for 'Internet.com'
Many lessons in managing computer centers the size of a football field were learned this year. How much of that will stick in 2010? >>> More
Can Ubuntu Server Be a Datacenter Leader?

as seen on Internet.com - Search for 'Internet.com'
The flexibility of Ubuntu's cost structure offers a competitive advantage: companies purchase support for it only if they need or want to. >>> More

Related posts about power

Power supply triggered to start by another power supply

as seen on Super User - Search for 'Super User'
I am building a raid array in a separate enclosure. I will be putting an empty tower case next to an existing tower computer, and this second tower case will only hold hard drives. There are many solutions for connecting the drives in the second case to the raid card in the first case (SFF-8088… >>> More
Which power USB hub uses if it has external power supply as well

as seen on Super User - Search for 'Super User'
I have 7 port USB hub with external supply. I tried turning it off by removing external power but then it takes power from motherboard and is still working. I have many external hardrives connected to it. i was worrying if i turn off the power it may damage the motherboard by withdrawing so much… >>> More
External Monitors shut off when Laptop Lid closes

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I have researched the solution... gconftool-2 --type string --set /apps/gnome-power-manager/buttons/lid_ac "nothing" does not fix it. I have two external monitors and when I close my lid the settings are reset and the laptop's monitor is set to the default. Thanks! gsettings list-recursively… >>> More
Turn a Computer Power Supply into a Desktop Power Supply

as seen on How to geek - Search for 'How to geek'
If you’re looking for a desktop power supply for your electronics workbench, this tutorial video shows you how to turn a computer PSU into a desktop power supply. In the above video the guys at JumperOneTV show us how to make a desktop power supply. As an addendum to the video; they note in… >>> More
How to prevent screen locking when lid is closed?

as seen on Ask Ubuntu - Search for 'Ask Ubuntu'
I have Ubuntu 11.10 with Gnome 3 (no Unity), gnome-screen-saver has been removed and replaced with xscreensaver. The screensaver stuff all works fine -- no complaints there. When I close my laptop lid, even for a second, the screen locks (and the dialog box asking for my password is xscreensaver's)… >>> More