[140463] in North American Network Operators' Group
Re: Japan electrical power?
daemon@ATHENA.MIT.EDU (Robert Bonomi)
Wed May 11 15:10:49 2011
Date: Wed, 11 May 2011 14:10:31 -0500 (CDT)
From: Robert Bonomi <bonomi@mail.r-bonomi.com>
To: robert@tellurian.com, zeusdadog@gmail.com
In-Reply-To: <BANLkTik9M2V8wFQ7quPvumCVLHEtcBwPJw@mail.gmail.com>
Cc: nanog@nanog.org
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
> From nanog-bounces+bonomi=mail.r-bonomi.com@nanog.org Wed May 11 13:22:18 2011
> Date: Wed, 11 May 2011 14:21:30 -0400
> Subject: Re: Japan electrical power?
> From: Jay Nakamura <zeusdadog@gmail.com>
> To: Robert Boyle <robert@tellurian.com>
> Cc: nanog@nanog.org
>
> On May 11, 2011 10:09 AM, "Robert Boyle" <robert@tellurian.com> wrote:
> >
> > Hello,
> > I know voltage varies from town to town and prefecture to prefecture.
>
> No, it doesn't. Japan has two systems, both 100v, western Japan has 60Hz,
> eastern Japan has 50Hz.
'Nominal' voltage, that is. with relatively poor regulation. 'local'
variation +/-10% (or more) is the norm. Handling +/-15% will cover
practically all 'routine' volatage excursions. If I was designing, I'd
spec for at least 25%, and probably "30% plus", variance.
