Re: OOT:Power Quality in Data Center

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
>
>
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Received on Thu Dec 24 2009 - 14:30:15 ART