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Hi all,<br>
<br>
A couple of years ago, the US govt decided to stop requiring the line
frequency to be regulated so tightly. I'm assuming they implemented
the plan. Most of the old news articles are gone, and I couldn't find
much by googling. I did find these:<br>
<br>
<a class="moz-txt-link-freetext" href="http://wattsupwiththat.com/2011/06/25/it-hertz-when-you-do-that-power-grid-to-stop-regulating-60-hz-frequency/">http://wattsupwiththat.com/2011/06/25/it-hertz-when-you-do-that-power-grid-to-stop-regulating-60-hz-frequency/</a><br>
<a class="moz-txt-link-freetext" href="http://www.eevblog.com/forum/chat/power-line-frequency-changes-may-lead-to-trouble-for-usa/">http://www.eevblog.com/forum/chat/power-line-frequency-changes-may-lead-to-trouble-for-usa/</a><br>
<a class="moz-txt-link-freetext" href="http://usatoday30.usatoday.com/tech/news/2011-06-24-power-grid-appliances-electronics_n.htm">http://usatoday30.usatoday.com/tech/news/2011-06-24-power-grid-appliances-electronics_n.htm</a><br>
<br>
I don't know for sure what the new standards are, but 58 Hz might be OK
within the new guidelines. Anyone know what the current actual
standards are?<br>
<br>
I think the standards are at this source, but I couldn't find them.<br>
<br>
<a class="moz-txt-link-freetext" href="http://www.nerc.com/Pages/default.aspx">http://www.nerc.com/Pages/default.aspx</a><br>
<br>
A modern grid tie inverter for home power will automatically
synchronize to grid frequency within set limits. Outside of those
limits, it probably won't connect at all.<br>
<br>
I checked the manual for an APC Smart UPS:<br>
<br>
<a class="moz-txt-link-freetext" href="http://www.apcmedia.com/salestools/ASTE-6Z8LAM/ASTE-6Z8LAM_R0_EN.pdf">http://www.apcmedia.com/salestools/ASTE-6Z8LAM/ASTE-6Z8LAM_R0_EN.pdf</a><br>
<br>
It's specs are 60 Hz +/- 5%, which works out to 57 Hz - 63 Hz.<br>
<br>
PS Many people think they get 110 V from the wall outlet. Actually,
the standard for the US is 120 V / 240 V for single phase.<br>
<br>
<a class="moz-txt-link-freetext" href="http://en.wikipedia.org/wiki/Grid_power">http://en.wikipedia.org/wiki/Grid_power</a><br>
<br>
The power running my computer right now is 120.2 V according to the
Kill-A-Watt EZ.<br>
<br>
Sincerely,<br>
<br>
Ron<br>
<br>
<br>
On 8/14/2013 10:29 AM, Jim Kinney wrote:
<blockquote
cite="mid:CAEo=5PzJ+Dpr6pwOW0L+Jy1EU=+LFnnNVX=ZpEv_GyxkyrVyOQ@mail.gmail.com"
type="cite">
<div dir="ltr">
<div>That is REALLY BAD!!<br>
<br>
</div>
The one thing that power providers are REQUIRED to make is 60.0 Hz.
Otherwise BadThings happen to many, many devices (medical, media, etc).
They're not supposed to be able to inject into the grid without a lock
in at 60.0Hz. That's a big expense for home power to be able to sell
back excess into the grid is the gear to synchronize at 60.0Hz. If the
power is out of phase, it reduces the power available on the grid and
really pisses off all the other grid providers. <br>
<br>
So I think he got the problem wrong. <br>
<br>
Many providers don't provide a solid 110V (actually they provide
something around 125kV that gets transformered down to house
110/220V.). A cost savings way to provide power is to be sloppy on the
output power - i.e. provide 109V or 108V. <br>
<br>
A power device expecting 110V and getting 109 or less loses efficiency
and often that will cost either excess heat (which lowers lifetime) or
simply produced less output (should not impact lifetime). My battery
backups _really_ don't like the generator I have as the bottom end of
the AC cycle is noisy and below 108V causing rapid switching. I was
able to adjust the kick-in voltage and save the batteries (ugh! all due
for replacement and $150+ each). <br>
</div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">On Wed, Aug 14, 2013 at 10:11 AM, Doug Hall <span
dir="ltr"><<a moz-do-not-send="true"
href="mailto:doughalldev@gmail.com" target="_blank">doughalldev@gmail.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote"
style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div dir="ltr">I just had my air conditioner replaced yesterday,
and the AC guy said something that I thought was interesting. He said
that Alabama Power (my provider) was fairly good at producing power
inexpensively, but bad at distributing it. He said that rather than the
supposed 60hz that they're supposed to deliver, it's usually a little
less than that - say around 58-59Hz. It's usually close enough to not
fry everything from brownouts, but also low enough to lower the
longevity of things like these energy-saving lights that are supposed
to last ten years. This has been my experience, by the way. They tend
to go bad after a couple of years (maybe).</div>
<div class="HOEnZb">
<div class="h5">
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">On Tue, Aug 13, 2013 at 4:38 AM, Jim Lynch
<span dir="ltr"><<a moz-do-not-send="true"
href="mailto:ale_nospam@fayettedigital.com" target="_blank">ale_nospam@fayettedigital.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote"
style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div>On 08/12/2013 11:09 PM, Ron Frazier (ALE) wrote:<br>
<blockquote class="gmail_quote"
style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
I wish I could figure out a way to participate in the led market but
the big box stores and online retailers eliminate most of the
possibilities for little guys.<br>
</blockquote>
</div>
There's always the niche markets, like RV and boat users who are
looking for better ways to conserve power.<span><font color="#888888"><br>
<br>
Jim.</font></span>
<div>
<div><br>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</div>
</blockquote>
</div>
<br>
<br clear="all">
<br>
-- <br>
<div dir="ltr">-- <br>
James P. Kinney III<br>
<i><i><i><i><br>
</i></i></i></i>Every time you stop a school, you will have to build
a jail. What you gain at one end you lose at the other. It's like
feeding a dog on his own tail. It won't fatten the dog.<br>
- Speech 11/23/1900 Mark Twain<br>
<i><i><i><i><br>
<a moz-do-not-send="true" href="http://heretothereideas.blogspot.com/"
target="_blank">http://heretothereideas.blogspot.com/</a><br>
</i></i></i></i></div>
</div>
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<br>
<pre class="moz-signature" cols="72">--
(PS - If you email me and don't get a quick response, you might want to
call on the phone. I get about 300 emails per day from alternate energy
mailing lists and such. I don't always see new email messages very quickly.)
Ron Frazier
770-205-9422 (O) Leave a message.
linuxdude AT techstarship.com
Litecoin: LZzAJu9rZEWzALxDhAHnWLRvybVAVgwTh3
Bitcoin: 15s3aLVsxm8EuQvT8gUDw3RWqvuY9hPGUU
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