[time-nuts] Power glitch - Sat morning

[Thierry MUSEUX]

In France it is a different abonnement, standard mono phasé and other tri phasé.
Standard mono phasé is for regular home.
Regular, it is only tree wires, one phase and one neutral and one earth, the neutral is connected to the earth in the district distribution with 240V, 50 Hz




Thierry MUSEUX

Delivery : Incuballiance/Géoflex - 86 rue de Paris - 91400 ORSAY - France
Invoice :   Géoflex - 4 grande rue du 8 mai 1945 - 91430 VAUHALLAN - France

-----Message d'origine-----
De : time-nuts [mailto:time-nuts-bounces at lists.febo.com] De la part de Mark Spencer
Envoyé : mercredi 1 avril 2020 19:15
À : Discussion of precise time and frequency measurement
Objet : Re: [time-nuts] Power glitch - Sat morning

Would a time nut in Europe in a typical single family home have access to all three phases ?  

If so would there be any benefit to monitoring the frequency of each phase ?


Mark Spencer

mark at alignedsolutions.com
604 762 4099

> On Apr 1, 2020, at 9:50 AM, Poul-Henning Kamp <phk at phk.freebsd.dk> wrote:
> 
> --------
> In message <3b7684a9-2702-295b-4935-33a9b3f47182 at earthlink.net>, jimlux writes:
> 
>> In EU, where 240V is the default line voltage, I wonder what the 3 phase 
>> distribution is?  Is it 415 delta / 240 star
> 
> 230V actually, and yes, it is universally 400 delta / 230 star.
> 
> That's also why you only ever see an auto-tranformer if somebody
> imported gear (typically computers) from USA.
> 
> The most important difference from US is that co-poling of LV and
> MV has almost never been practiced over here, so transients almost
> only happen in thunder.
> 
> For the same reason MV (typically 10kV) to LV transformers are
> typically larger than the polemounted "buckets" used in USA.
> 
> Her in DK MV/LV's are usually around 1MW, and they will supply
> about a square kilometer of town or ten square kilometers of
> rural landscape.
> 
> An advantage of the large number of installations per trafo is that
> load is even across the three phases, so you can run the transformer
> closer to spec than any utility in USA would be happy with.
> 
> Protective grounding differs, between countries and in countries, depending
> on how hard it is to drive a good PE electrode (DK: Trivial, NO: Forget it)
> 
> On the flip side, while we have agreed on the voltage, there are 13 different
> national standards for the plugs and sockets on consumer-stuff...
> 
> -- 
> Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
> phk at FreeBSD.ORG         | TCP/IP since RFC 956
> FreeBSD committer       | BSD since 4.3-tahoe    
> Never attribute to malice what can adequately be explained by incompetence.
> 
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