[time-nuts] Power glitch - Sat morning

[Mark Spencer]

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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