Re: OOT:Power Quality in Data Center

Yes,

My company makes a full line of these types of devices. www.apc.com
The product needed really depend on the size and power requirements of the
data center.
It also makes it nice for me as I get a ton of freebiees ;-) You should see
my home rack.

 Chris

On Thu, Dec 24, 2009 at 2:55 PM, Wouter Prins <wp_at_null0.nl> wrote:

> Nice post and gadget Christopher!
>
> Do you perhaps know how datacenters protect against the 'blind
> current/reactive power'?
>
> Thanks!
>
> 2009/12/24 Christopher Copley <copley.chris_at_gmail.com>
>
> Depends on that you define as quality power. There are a few ways to define
>> that...
>> 1. How clean is your power (conditioning)
>> 2. Constant flow from a commercial source
>> 3. Back up power operations
>>
>> The above are just a few things that can fall in that definition.
>> You can always get an amprobe, and that can tell you your amperage,
>> voltage,
>> watts, etc. I personally have an amprobe and a device called a killowatt.
>> (
>> http://www.thinkgeek.com/gadgets/travelpower/7657/ ) But you really
>> need
>> to understand electric to understand what it is all telling you.
>>
>> As a Cisco tech I personally would recommend to a client to call a
>> certified
>> electrician, one that specializes in data center power. Depending on how
>> larger the Data Center is they might have an electrician on call. (it is
>> better to let a rack of gear fail, than to kill your self)
>>
>> My personal saying IMHO, if you do not understand electricity don't even
>> pretend to talk to a client about it or even touch it EVER. Typically
>> Data
>> Centers have high voltage feeds to most racks (120 and above)
>>
>> I can not stress it enough... It is a VERY VERY VERY dangerous thing and
>> can
>> bit you hard and fast in many many many ways. I work for an power
>> distribution manufacturer and nearly every employee is an electrical
>> engineer or certified electrician, and they always stress, let the pro's
>> handle the stuff that can kill you.
>>
>> Please keep in mind this is all IMHO,
>>
>> HTH
>> Chris
>>
>>
>>
>> On Thu, Dec 24, 2009 at 1:45 PM, ospfv2 <ospfv2_at_gmail.com> wrote:
>>
>> > the scenario
>> >
>> > you arrived in data center,
>> > you plug your laptop adaptor into rack PDU,
>> > your touch-pad pointer going crazy.
>> > so you grab a usb-mouse & connect it to your laptop.
>> >
>> >
>> > then your cisco switch doesn't function properly,
>> > it was ok when you configure it in the office.
>> >
>> > have you ever encounter this issue ?
>> >
>> > some people told me it was harmonic problem
>> > some said it was grounding problem
>> > any idea ?
>> > is there any tools to measure the power quality
>> > before the customer ask me to replace the whole rack and switches
>> >
>> >
>> > Blogs and organic groups at http://www.ccie.net
>> >
>> > _______________________________________________________________________
>> > Subscription information may be found at:
>> > http://www.groupstudy.com/list/CCIELab.html
>>
>>
>> Blogs and organic groups at http://www.ccie.net
>>
>> _______________________________________________________________________
>> Subscription information may be found at:
>> http://www.groupstudy.com/list/CCIELab.html
>>
>>
>>
>>
>>
>>
>>
>>
>
>
> --
> Wouter Prins
> wp_at_null0.nl

Blogs and organic groups at http://www.ccie.net
Received on Thu Dec 24 2009 - 16:02:59 ART