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<div class="moz-cite-prefix">On 13-Feb-17 06:09 PM, François Lacombe
wrote:<br>
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cite="mid:CAG0ygLcmB8zasK4dQ9KWAbW66X8GCcMw=xm6oAHwN4QuLwZPhg@mail.gmail.com"
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<div>Hi,<br>
<br>
</div>
Thank you Jherome for this
clarification attempt.<br>
</div>
No objection against mixing poles and
tower on any lines.<br>
<br>
</div>
Regarding the phase=2 discussion,
phases=* have a clear definition.<br>
</div>
Occidental countries usualy have 3-phases
power grids, but sometimes, 2 phases lines
are used to feed train traction
substations or heavy industries. It's not
about a single phase line with neutral
pole + 1 live cable, it's 2 live cables
often taken from 3-phases substation or
line.<br>
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<br>
In Australia;<br>
Heavy industry gets 3 phases. <br>
A few houses may get 2 phases if their load is very large .. but it
is unusual and a safety concern, no single room should have more
than one phase. <br>
Even fewer houses get 3 phase .. usually where the workshop has a
requirement for a 3 phase motor/furnace. <br>
<br>
<blockquote
cite="mid:CAG0ygLcmB8zasK4dQ9KWAbW66X8GCcMw=xm6oAHwN4QuLwZPhg@mail.gmail.com"
type="cite">
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<div>According to the picture used, this is
the correct value : the transformer has 2
cables from a 3-phases line (without neutral
pole) connected to its primary side.<br>
<a moz-do-not-send="true"
href="https://upload.wikimedia.org/wikipedia/commons/e/e3/Bridleway%2C_Atwick_-_geograph.org.uk_-_386117.jpg">https://upload.wikimedia.org/wikipedia/commons/e/e3/Bridleway%2C_Atwick_-_geograph.org.uk_-_386117.jpg</a><br>
<br>
</div>
Furthermore, I'm wondering what's the best
tagging regarding transformers or switches
installed on top of power poles/towers :<br>
</div>
power=pole<br>
</div>
transformer=distribution<br>
</div>
voltage=...<br>
</div>
phases=...<br>
<br>
</div>
or<br>
<br>
</div>
power=pole<br>
</div>
transformer=distribution<br>
</div>
transformer:phases=...<br>
</div>
transformer:voltage=...<br>
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<div><br>
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<div>Looking forward to your comments<br>
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<br>
Transformers will have an input voltage and an output voltage,
usually these voltages are different. <br>
Most of the time these voltages will be on the lines connected to
the transformer (and the pole) and would be redundant. <br>
<br>
Switches ... usually used for isolation. <br>
<br>
<blockquote
cite="mid:CAG0ygLcmB8zasK4dQ9KWAbW66X8GCcMw=xm6oAHwN4QuLwZPhg@mail.gmail.com"
type="cite">
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<div>All the best<br>
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<div class="gmail_extra"><br clear="all">
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<div class="gmail_signature" data-smartmail="gmail_signature">
<div dir="ltr"><b>François Lacombe</b><br>
<br>
fl dot infosreseaux At gmail dot com<br>
<a moz-do-not-send="true"
href="http://www.infos-reseaux.com" target="_blank">www.infos-reseaux.com</a><br>
<a moz-do-not-send="true"
href="http://www.twitter.com/InfosReseaux"
target="_blank">@InfosReseaux</a></div>
</div>
</div>
<br>
<div class="gmail_quote">2017-02-13 1:39 GMT+01:00 Tristan
Anderson <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:andersontristan@hotmail.com" target="_blank">andersontristan@hotmail.com</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
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<div id="m_-7990353600382925590divtagdefaultwrapper"
style="font-size:12pt;color:#000000;font-family:Calibri,Arial,Helvetica,sans-serif"
dir="ltr">
<p>There's an intersting discussion about this here:</p>
<p><br>
</p>
<p><a moz-do-not-send="true"
href="https://wiki.openstreetmap.org/wiki/Talk:Tag:power%3Dtransformer"
class="m_-7990353600382925590OWAAutoLink"
id="m_-7990353600382925590LPlnk435429"
target="_blank">https://wiki.openstreetmap.<wbr>org/wiki/Talk:Tag:power%<wbr>3Dtransformer</a><br>
</p>
<p><br>
</p>
<p>Here it is suggested that split single-phase power be
tagged as phases=2. I disagree with this, and instead
advocate tagging it as phases=1 voltage=240. In North
America at least, this implies split single-phase
power. The tag phases=2 should be reserved for the
rare instances (maybe not so rare in some parts of the
world?) where actual two-phase power is present.</p>
<p><br>
</p>
<p>Either way, this needs to be standardized and
whatever decision we come to needs to be made clear on
the wiki pages for power=transformer and the new power
pole extension proposal.</p>
<div style="color:rgb(0,0,0)">
<hr style="display:inline-block;width:98%">
<div id="m_-7990353600382925590divRplyFwdMsg"
dir="ltr"><font style="font-size:11pt"
face="Calibri, sans-serif" color="#000000"><b>From:</b>
Kevin Kenny <<a moz-do-not-send="true"
href="mailto:kevin.b.kenny%2Bosm@gmail.com"
target="_blank">kevin.b.kenny+osm@gmail.com</a>><br>
<b>Sent:</b> February 12, 2017 7:14 PM<span
class=""><br>
<b>To:</b> Tag discussion, strategy and related
tools<br>
<b>Subject:</b> Re: [Tagging] Feature Proposal -
RFC - Power pole extension</span></font>
<div> </div>
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<div class="h5">
<div>
<div dir="ltr">I think I've seen two-phase power
once, in a commercial building in
Philadelphia, built around 1905. All the
high-power uses (HVAC, mostly) in the building
were actually driven off 208 or 480 volt
three-phase, provided by phase-converting
transformers and switch gear. There were a
handful 240-volt circuits that were stepped
down (or tapped?) from the 480, and a lot of
the lighting was run off the 277-volt
phase-to-neutral of the 480 circuits. The
building electricians regarded the two-phase
four-wire power as a damned nuisance.
<div>
<div><br>
</div>
<div>Two-phase is surely uncommon in the US,
while split-single-phase is ubiquitous.</div>
</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Sun, Feb 12, 2017
at 6:41 PM, Mike Thompson <span dir="ltr">
<<a moz-do-not-send="true"
href="mailto:miketho16@gmail.com"
target="_blank">miketho16@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote"
style="margin:0 0 0 .8ex;border-left:1px
#ccc solid;padding-left:1ex">
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<div class="gmail_extra"><br>
<div class="gmail_quote"><span>On Sun,
Feb 12, 2017 at 4:34 PM, Warin <span
dir="ltr">
<<a moz-do-not-send="true"
href="mailto:61sundowner@gmail.com"
target="_blank">61sundowner@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote"
style="margin:0 0 0
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solid;padding-left:1ex">
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<div
class="m_-7990353600382925590m_6246063173611644606m_5756613981422514471moz-cite-prefix">On
13-Feb-17 10:25 AM,
Tristan Anderson wrote:<br>
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<blockquote type="cite">
<div
id="m_-7990353600382925590m_6246063173611644606m_5756613981422514471divtagdefaultwrapper"
dir="ltr"
style="font-size:12pt;color:#000000;font-family:Calibri,Arial,Helvetica,sans-serif">
<p>If two-phase power
isn't currently in use
anywhere, it simply
means we won't see any
instances of the tag
phases=2, just like
how we'll never see
phases=17. It doesn't
make anything
fundamentally wrong
with the tagging
scheme. I believe
this is a good
proposal that should
be voted on.</p>
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</blockquote>
<br>
</span>
<p><font face="Times New
Roman" size="+1">There
will need to be very
careful wording of
phases=2 to avoid American
mappers misusing this tag
for 240v
</font><font face="Times New
Roman" size="+1">split
single phase. </font></p>
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</blockquote>
</span>
<div>That is my concern. This is a
typical mistake. </div>
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<p><font face="Times New
Roman" size="+1"> I think
there will be instances of
phase=2 occurring in the
USA, possibly many
instances.<br>
</font></p>
</div>
</blockquote>
</span>
<div>Do you mean instances of the
tag phase=2, or actual two phase
power?</div>
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<br>
<pre>Instance of the tag phase=2 misused.</pre>
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