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Text 3083, 132 rader
Skriven 2005-03-10 18:41:26 av John Oellrich (1:379/45)
   Kommentar till text 3046 av Ellen K. (1:379/45)
Ärende: Re: UPS questions
=========================
From: "John Oellrich" <john@oellrich.us>

This is a multi-part message in MIME format.

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Ellen,

You may know from my various posts over the years that I worked as a = power
lineman for a while. When we were trying to restore power after a = service
disruption, particularly if it was a wide spread one, bad stuff = would happen.
Repair a high-voltage primary line, think we had solved = the problem for one
area, replace the fuse, and punch it back in only to = have it blowup
spectacularly! Search the run some more, find another = high voltage line down
which is lying across the secondary. When we = plugged the fuse back in 7.2KV
was shunted in to every house connected = to that secondary for a brief period.

The why so, in the above scenario, is that the protection circuitry in = your
unit probably took a spike when the first outage occurred, and it = definitely
took another in the second. The first one likely weakened the = protection
circuitry, the second one could have overwhelmed it.

Here is how I handle things with an approaching severe thunder storm, I = shut
everything down, unplug the surge protectors from the wall outlets, =
disconnect the cable TV and DSL lines. I only rely on my surge = protectors for
the completely unexpected.

Besides unless you bought a really humongous UPS, the shutdown time of = your
system may use up a significant time of its capacity.

--=20
john

john@oellrich.us
  "Ellen K." <72322.1016@compuserve.com> wrote in message =
news:g8b0319gnhde7lbi3i2htp5kpj1shbvk1a@4ax.com...
  I take it the below is your advice... Why so, compared to being able =
to
  work through?

  On Wed, 9 Mar 2005 19:17:50 -0500, "John Oellrich" <john@oellrich.us>
  wrote in message <422f9180$1@w3.nls.net>:

  >Ellen,
  >
  >Shutdown on any power loss. And stay that way until the power is =
stable.

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META http-equiv=3DContent-Type content=3D"text/html; =
charset=3Diso-8859-1">
<META content=3D"MSHTML 6.00.2900.2604" name=3DGENERATOR>
<STYLE></STYLE>
</HEAD>
<BODY bgColor=3D#ffffff>
<DIV>Ellen,</DIV>
<DIV>&nbsp;</DIV>
<DIV>You may know from my various posts over the years that I worked as =
a power=20
lineman for a while. When we were trying to restore power after a = service=20
disruption, particularly if it was a wide spread one, bad stuff would =
happen.=20
Repair a high-voltage primary line, think we had solved the problem for =
one=20
area, replace the fuse, and punch it back in only to have it blowup=20
spectacularly! Search the run some more, find another high voltage line =
down=20
which is lying across the secondary. When we plugged the fuse back in = 7.2KV
was=20
shunted in to every house connected to that secondary for a brief =
period.</DIV>
<DIV>&nbsp;</DIV>
<DIV>The why so, in the&nbsp;above scenario,&nbsp;is that the protection =

circuitry in your unit probably took a&nbsp;spike when the first outage=20
occurred, and it definitely took another in the second. The first one =
likely=20
weakened the protection circuitry, the second one could have overwhelmed =

it.</DIV>
<DIV>&nbsp;</DIV>
<DIV>Here is how I handle things with an approaching severe thunder =
storm, I=20
shut everything down, unplug the surge protectors from the wall outlets, =

disconnect the cable TV and DSL lines. I only rely on my surge = protectors
for=20
the completely unexpected.</DIV>
<DIV>&nbsp;</DIV>
<DIV>Besides unless you bought a really humongous UPS, the shutdown time =
of your=20
system may use up a significant time of its capacity.</DIV>
<DIV><BR>-- <BR>john</DIV>
<DIV>&nbsp;</DIV>
<DIV><A href=3D"mailto:john@oellrich.us">john@oellrich.us</A></DIV>
<BLOCKQUOTE=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
  <DIV>"Ellen K." &lt;<A=20
  =
href=3D"mailto:72322.1016@compuserve.com">72322.1016@compuserve.com</A>&g=
t;=20
  wrote in message <A=20
  =
href=3D"news:g8b0319gnhde7lbi3i2htp5kpj1shbvk1a@4ax.com">news:g8b0319gnhd=
e7lbi3i2htp5kpj1shbvk1a@4ax.com</A>...</DIV>I=20
  take it the below is your advice... Why so, compared to being able =
to<BR>work=20
  through?<BR><BR>On Wed, 9 Mar 2005 19:17:50 -0500, "John Oellrich" =
&lt;<A=20
  href=3D"mailto:john@oellrich.us">john@oellrich.us</A>&gt;<BR>wrote in =
message=20
  &lt;<A=20
  =
href=3D"mailto:422f9180$1@w3.nls.net">422f9180$1@w3.nls.net</A>&gt;:<BR><=
BR>&gt;Ellen,<BR>&gt;<BR>&gt;Shutdown=20
  on any power loss. And stay that way until the power is=20
stable.<BR></BLOCKQUOTE></BODY></HTML>

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