[132910] in North American Network Operators' Group
RE: Want to move to all 208V for server racks
daemon@ATHENA.MIT.EDU (Ingo Flaschberger)
Thu Dec 2 16:49:39 2010
Date: Thu, 2 Dec 2010 22:46:19 +0100 (CET)
From: Ingo Flaschberger <if@xip.at>
To: John van Oppen <jvanoppen@spectrumnet.us>
In-Reply-To: <AF24AE2D4A4D334FB9B667985E2AE7637AB5E2@mail1-sea.office.spectrumnet.us>
Cc: NANOG list <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
> It is probably worth nothing that a 3-phase input in Europe is actually
> 240/415 volt Y (for every panel I have seen in Germany at least, even
> the places I have lived there had 240/415 three phase). The normal 240v
> single phase outlet circuits were the phase to neutral voltage.
> Obviously Europe also runs at 50 hz vs 60 in the US as well but the
> three phase still works the same way.
>
> A Europe 64 amp 240/415 circuit is pretty close to equivalent in to a
> 277/480 Y configured 60 amp circuit in the US. The biggest notable
> difference is that equipment that runs on two different service voltage
> ranges where Europe has far less need for in-building step-down
> transformers since even small loads work on the phase-to-neutral voltage
> of the big services. I always find it interesting in the US to note how
> many 480v to 120/208Y step-down transformers one can find in a big
> building or datacenter.
>
aeh.. 230V / 400V is right voltage in technical terms in most european
copuntries.
(years ago it was 220V / 380V, before it was decided to go up with the
voltage)
and in bigger datacenters there are also step down transformers from 10kV
down.
Kind regards,
Ingo Flaschberger
