Text 1351, 97 rader
Skriven 2014-07-12 15:43:06 av Mike Luther (1:117/100.0)
   Kommentar till text 1350 av Tom Walker (1:123/140)
Ärende: UPS Clicking-Report
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Something seems slightly missing in this discussion here, grin!

ML>BR>Mine doesn't click, it just beeps like mad when I lose power lol

ML>  UPS == Uninterruptible Power Supply

ML>over-voltage...

ML>UPSes DO have relays in the
ML>for when they switch to their batteries... other UPSes choose to use
ML>solid-state relays for their switching... all of my 
ML>APC UPSes have relays an
ML>always have had them...

I've used nothing but APC -> Smart <- UPS equipment for years and years now.
The reason is that you need to very carefully choose the 'Smart' version is
that remember your power line service is alternating current, AC, service. It
is sine wave service where, per Tesla's contribution to this stuff way, way
back, the voltage goes back and forth from positive to negative in a smooth
waveshape so that we all can use pig iron transformer operations for everything
from the monsters you see in the power substation yards down to even tiny ones
in, say, five watt short wave ham transmitters and receivers. Or .. in my case
my hand designed and personally built KW CW amps that helped me be the only
person ever in the history of ham radio to apply for a 300 country original
ARRL DXCC award only on 40 meter telegraphy.  The same band and equipment I
used to kill the original Russian Woodpecker OTH radar and get it out of the
ham bands for all us even EOC folks back in the mid-1970's.

The key is that when you are really 'protecting' any AC equipment like all
this, think a bit.  Poof, power goes off!  OK, your UPS has to generate and
turn on AC power exactly at the same 60 or 50 hertz frequency that you normally
use.  Plus do it fast enough so there is no interruption for the critical
equipment and service it is protecting.  Slow forward now. OK, your normal
power service comes back on.  But wait!  You ABSOLUTELY have to match the new
'normal' sine wave shape and frequency to your UPS service sine wave and
frequency.  Or BOOOOOOM, the two electrical sources will fight with each other
and even blow up something like your whole equipment.  And a simple RELAY can
do this??  Not a chance.  Your UPS absolutley has to move the emergency service
wave form to the EXACT timing and shape of the replacement standard power
source!  That is exactly what a 'SMART' UPS does.  So you don't blow up this or
that which is plugged into it.  This can get a lot bigger.

A 'UPS' ain't at all what a backup or replaced or added electric generator is
for the or multiple power companies need is it?  Absolutely necessary is a way
to perfectly match the phase and waveshape of any new generator AC power source
to the or a 'grid' line operation when it touches it!  Because if you don't,
you can blow up the whole generator operation if you don't absolutely match it
to the souce line it is being attached to!  Couple of interesting little facts
I know about such life.  In the early 1950's when I was in the 8th and 9th
grade here in school at College Station, Texas, besides the local cops, the
State police, and the Texas A&M cops, the campus cops that were KK's to us, I
also maintained the radio for Mr. Frank Brown's wrecker trucks. For which he
let me drive them even back in early high school here, grin! What I did learn
from him was that his father was one of the engineers for the Texas Aggie
electric power plant on the campus!  They expanded the plant and put in a new
added major generator.  But got the wires crossed on the oscilliscope to use to
change the rotation speed on the new generator to gently synchronize it's phase
to match the power line operation of the major operations.  Perfect match on
the screen!  They threw the switch to bridge it to the system!  BLAMMMMM!  It
blew the whole new generator off the concrete table and totally ruined it!  But
wait!  There's more!

My best friend at the time of my first degree from Texas A&M had a double
degree in electrical and mechanical engineering.  His real to this day special
interest and capability is in hydraulic engineering.  However, a decade or so
after he and I graduated in 1965, he went to work for a major power company out
in West Texas.  He wasn't in charge of the particular expansion of the
generator service out there for all Abilene and so on, but was watching over a
completely existing generation plant when the new one was being added to the
grid.  Guess what?  Exactly the same thing happened out there in West Texas
that I had decades before learned about happened at Texas A&M College!!  The
error completely blew up the new megawatt generator, blew the bolts apart and
hurled it off it's complete mounting pad.  No, my friend Mike Clifford was
*NOT* involved at all in being responsible for any of this. However, as we were
both already in the 1970's VERY famillar with what a single atomic bomb could
do to the power grid and every copper wire connected electric system for even
the whole USA from one bomb and that even the solar flares could really be
worse, he made the decision to leave the electical industry and not ever be
involved in this or that phase error issue, if at all possible.  Both of us
were even back then completely aware of the Carrington Event Solar Flare in
1869, two years after the the Golden Spike was driven here in the USA on the
railroads that joined the East and West Coast.  Which burned up all of the
telegraph operations in the whole USA.  Killed three Morse Code operaters that
were sending code and put some 23 more in hospitals when it hit!  And where the
EMP wave hit the railroad rails as it arced from them to the ground where this
stuff goes, in six places it even set the wood cross ties on fire!

Yes I learned a LONG time ago to NEVER use a UPS that was not a SMART UPS and
further to NEVER use a UPS that did not have an internal pig iron power
transformer to really protect you from nasty power surges.  Plus make sure that
when it bridged to the return of normal power. the phase was matched between
everything.  Thank you SMART APC!

Mike Luther N117C at 1:117/100

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 * Origin: BV HUB CLL(979)696-3600 (1:117/100)