[TechAssist] Re: 220v
- From: "art bevilacqua" <abevilac@xxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sat, 21 Dec 2002 00:20:01 -0500
That one wire is the primary supply. Look carefully at the transformers
and you will see the ground/neutral attached to the transformer tank.
The transformer pole will probably have a ground lead running all the
way down the pole to a ground rod, and that ground lead will also be
bonded to the secondary ground lead.=20
The order of voltages on a distribution pole, from the top to the bottom
is something like this: Primaries at the top, secondaries next down from
the top (those are the 120/240 volt circuits, including a neutral), then
cable TV if I remember correctly, and finally phone circuits.
Also, if you look carefully, the secondaries fed by each transformer are
isolated from other transformers by a break in the secondary power
conductors (but not a break in the ground lead), usually the power leads
are cut, taped, and bent back.=20
Each section of secondary conductor "under" a transformer is called a
crib, and there can be one or multiple customers fed from each
transformer crib.
Back at the electric company, each transformer is given a pole number
(usually made up of a street code and pole number). Each customer fed by
a transformer crib is also assigned the same pole number as the source
transformer. By doing this, the utility can sum up each crib's customers
usage from their monthly bills, and using diversity factors estimate
each transformer's loading.
Overload transformers are flagged for replacement, or crib
reconfiguration (some customers moved off of one crib, onto the adjacent
crib).
Later, art
Art Bevilacqua
Essex Radio and TV
40 Main Street
Essex, MA 01929
abevilac@xxxxxxxxxxxxx
-----Original Message-----
From: techassist-bounce@xxxxxxxxxxxxx
[mailto:techassist-bounce@xxxxxxxxxxxxx] On Behalf Of Damon
Sent: Friday, December 20, 2002 10:44 PM
To: techassist@xxxxxxxxxxxxx
Subject: [TechAssist] Re: 220v
This cabling you're talking about....Are you saying that there are 3
wires
out on the main pole BEFORE the step-down tranformer, or after?
I've seen variations in Fort Wayne, most are 2 wire delivery (or
transmission) lines around the city, I've seen 3 or 4 wire 3 phase
systems
in the industrial areas, and I've seen any where from 2 wire up to 4
wire in
residential areas, but these 4 wire systems are actually 2 two wire
delivery lines supplying a larger residential area.
Wanna know what I think is weird? How about the delivery line into my
neighborhood.....for the life of me, I can't figure out how ONE WIRE
supplies our transformers.....that 2nd wire is well hid, or they're
actually
using the land as a return ground path at the transformer.
Man, go figure.
Damon Brunger
damon101@xxxxxxxxxxxxxx
Telrad Electronic Services
Ft Wayne, IN 46815
----- Original Message -----
From: "Chris Gorsch" <cgorsch@xxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, December 20, 2002 9:37 AM
Subject: [TechAssist] Re: 220v
>
> Hi Damon, this differs with Power suppliers, I live in the suburbs of
> Central Louisiana and we"re supplied by a Rural Electric Co. They
deliver
3
> wire 220 to homes, The 3rd wire is a large unshielded wire. Most Main
fuse
> boxes use both sides to gnd
> to balance the load. If 220 is needed then it is delivered from both
sides
> and there is a neutral (gnd) also used. the receptacles have
different
> forms depending on how much current is demanded. My neighbor had a
large
> workshop where he welded among other things and he had a special line
run
to
> supply him with 3 phase current for large motors, etc. Hope this
clears
some
> of the confusion about USA power, European is different depending on
which
> country U visit. Wal-Mart supplies a travel kit with adaptors for all
> counties U might visit.
> Ski
> BLESS AMERICA, PLEASE GOD!
> SKI-CHRIS GORSCH Retired Chris'TV/VCR Serv.
> ZACHARY, LA.
> cgorsch@xxxxxxx If Replying, Please Include Copy of Message
> =
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
> "Whatever it is the government does, sensible Americans would prefer
that
> the government do it to somebody else."-- PJ Orourke
> ----- Original Message -----
> From: "Damon" <DAMON101@xxxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Friday, December 20, 2002 5:52 AM
> Subject: [TechAssist] Re: 220v
>
>
> >
> > This really doesn't make economical sense, tri-phase systems in
> residential
> > areas??
> >
> > REALITY: 2 wires provide power, the only difference is the
transformer
> setup
> > that drops down the power to your home. In the land of 110 our
transformer
> > outputs 220V with a center tap that delivers 2 - 110V supplies or 1
-
220V
> > supply. (Hey, isn't that sweet....3 supplies in one, eh?).
> >
> > As for the european 220V supply system......I can only guess, but
you do
> not
> > have that Center-tap. And I really doubt that the electric company
is
> going
> > to use 2 wires for power, then strap on a 3rd wire for grounding
purposes
> > (what purpose would that serve, except to reference the metal
toaster
> casing
> > to your bathtub water??). I'm sure the 220V tranformers have no
practical
> > need for earth ground, since all the electronics would behave as
though
> they
> > had an "Isolation transformer" on them. (That's the stepdown
> > transformer...outside your home).
> >
> > Personally, I've heard that 110V is more dangerous than
220V......but I
> > don't see that as a logical argument...What.....110 has less
voltage,
> > therefore we enjoy holding onto it longer, thus toasting us, but not
the
> > europeans????
> > If anybody has an answer to why 220 is safer than 110.... I'm
listening.
> >
> > And that TRI-PHASE residential power supply??? Man, that is a load
of
> > hooey....of course, the government planners weren't reaching into
their
> > pockets, so I can assume they tapped into your dad's or grandad's
> wallet??
> >
> > Damon Brunger
> > damon101@xxxxxxxxxxxxxx
> > Telrad Electronic Services
> > Ft Wayne, IN 46815
> > ----- Original Message -----
> > From: "Vilhelm Boor" <villyboor@xxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>; <techassist@xxxxxxxxxxxxx>;
> > <techassist@xxxxxxxxxxxxx>
> > Sent: Friday, December 20, 2002 8:29 AM
> > Subject: [TechAssist] Re: 220v
> >
> >
> > >
> > > Villy Boor
> > > Boorelec Durban
> > > I have to come back with a post script, To get voltage for a TV
at
> over
> > 200V would require you to use a transformer. I am sure there could
be
> other
> > methods using odd switching type devices but extremes of design like
that
> > would be nonsense as it would be cheaper to get the correct model. I
can
> not
> > see where the smoke would be derived if you stuck this on your TV as
I
am
> at
> > a loss as to how you would hook it up.
> > > On Fri, 20 Dec 2002 07:59:10
> > >
> > > --
> > >
> > > On Fri, 20 Dec 2002 07:59:10
> > > Vilhelm Boor wrote:
> > > >
> > > >Villy Boor
> > > > Boorelec Durban
> > > > I am shocked that I know more about your power supplies in
North
> > America than seemingly you its residents do. North America works on
110V
> and
> > you are stuck with that, tough its not as safe and losses are
greater.
Now
> > you have a situation where you wish more voltage, you have to cheat
The
> > mains supply is 3 phase, it is usual to run a line down a street and
try
> to
> > balance the power by having house 1 on phase 1 house 2 on phase 2
etc.
To
> > get 220V you have to cheat, you use 2 phases so a plug has 2 live's.
But
> why
> > in the name of Freddy would we have to do that. Options on the back
of
TVs
> > have gone, that requires you have a mains transformer, costs money
is a
no
> > no. American TV is only viewable in America and a few other
countries,
the
> > rest of us use the PAL system a much later and superior system, it
follows
> > then there is no requirement for your sets to work here or X. No we
have
> > standard 3 pin plugs (flat Pins pointing at 10 and 2 with an unused
earth
> at
> > 6) nominal fuse volt
> > > a
> > >
> > > > ge
> > > > is 4A and there is no mystery
> > > >--
> > > >
> > > >On Thu, 19 Dec 2002 21:54:26
> > > > Julian Panizo wrote:
> > > >>
> > > >>In the countries with 220-240 V many sets have the 110 V option
via
> > switch
> > > >>and a few have the voltage change automatic. The household
wiring is
> two
> > (2)
> > > >>conductors, normally one hot and the other neutral, derived from
a
> > street
> > > >>trifasic supply. In a few countries you get in some places 220
and
> > others
> > > >>110.
> > > >>Julian
> > > >>
> > > >>Julian Panizo
> > > >>C.C. 1867 Asunci=F3n Paraguay
> > > >>Phone/Fax 595 21 601913
> > > >>panizo@xxxxxxxxxxxxxxx
> > > >>----- Original Message -----
> > > >>From: "Electric Medic" <info@xxxxxxxxxxxxxxxxx>
> > > >>To: <techassist@xxxxxxxxxxxxx>
> > > >>Sent: Thursday, December 19, 2002 8:41 PM
> > > >>Subject: [TechAssist] Re: 220v
> > > >>
> > > >>
> > > >>>
> > > >>> We STILL have not answered the QUESTION. Does this guys set
work
on
> > > >>> 220volts. He said the set worked on 110v but not properly on
220v.
I
> > can
> > > >>not
> > > >>> believe that the set was designed to work on 220v using the
same
> power
> > > >>cord
> > > >>> that came with the set. Every 220v circuit I have seen here in
the
> > states
> > > >>> has a different cord (larger plug) with two hots. Is this some
> special
> > > >>> CTC187AD. I think this is important enough to answer. We all
know
> that
> > 220
> > > >>> has to hots and a neutral, and 110 has one hot and a neutral.
I am
> > > >>> interested how in the world he is plugging a CTC187 into a
220v
> > outlet.
> > > >>> Please someone, or the owner of the set EXPLAIN. Everyone that
I
> have
> > seen
> > > >>> will smoke if you apply 220v. This is driving me crazy. Why
would
> > anyone
> > > >>> want to run his set on both 110v and 220v anyway? It seems to
me
if
> it
> > > >>> worked on 110v, that should be good enough. Very confused here
in
> > Georgia.
> > > >>>
> > > >>> Perry Bower
> > > >>> Electric Medic
> > > >>> "It's Cheaper to Keep Her"
> > > >>> http://www.electricmedic.com
> > > >>> Check out the Electronic Repair Screensaver We created. More
Images
> to
> > > >>come!
> > > >>> To download these Collections you must first install the
Eyetide
> > Viewer:
> > > >>>
> > >
> >
>
>>http://www.eyetide.com/download/?s=3DO3OfmSLHXygGHCv1W6Gz3Bgjtq3DNNMNdc=
K
sYSV
> > GC
> > > >>> "We're Number One Where it Really Counts, With our Customers"
> > > >>> 3850 Washington Road Suite 5b
> > > >>> Martinez, Georgia 30907
> > > >>> Phone: 706-8MEDIC4 (863-3424)
> > > >>> Phone: 706-863-3474
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> > > >>> mailto:info@xxxxxxxxxxxxxxxxx
> > > >>> "WE REPAIR WITH CARE"
> > > >>>
> > > >>> SERVICE CENTERS PLEASE READ!!
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> > > >>> 2. Are you short a tech or have one on vacation?
> > > >>> 3. Do you need help with a very difficult repair?
> > > >>> 4. Would you like to make money jobbing the work out?
> > > >>> 5. Would you like to ship out less profitable products so you
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> > repair
> > > >>> others?
> > > >>> If you answered Yes to any of the above questions, Checkout
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> > > >>websites:
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> > > >>>
> > > >>> -----Original Message-----
> > > >>> From: techassist-bounce@xxxxxxxxxxxxx
> > > >>> [mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of Larry E.
> > > >>> Sent: Thursday, December 19, 2002 2:11 PM
> > > >>> To: techassist@xxxxxxxxxxxxx
> > > >>> Subject: [TechAssist] Re: 220v
> > > >>>
> > > >>>
> > > >>>
> > > >>> Tommy, their talking about European tv sets not North American
> > > >>> Larry Eastman
> > > >>> American TV & Electronics
> > > >>> Crystal River, Fl. 34428
> > > >>>
> > > >>> Hermantvr@xxxxxxxxxxxxx wrote:
> > > >>>
> > > >>> > Guys...I really don't know what you mean when you talk abut
a TV
> > using
> > > >>> 220v.
> > > >>> > On a 120v line you have a hot side and a neutral (0 volts)
side.
> On
> > a
> > > >>240
> > > >>> > line you have two hot sides.....believe me it will let the
smoke
> out
> > of
> > > >>> yur
> > > >>> > power supply filters.
> > > >>> >
> > > >>> > Tommy Herman
> > > >>> > Herman TV
> > > >>> > 250 School Ave SW
> > > >>> > Taylorsville N.C. 28681
> > > >>> > 828-632-5322 Voice
> > > >>> > 828-632-3880 Fax
> > > >>> >
> > > >>> > If a TV requires 120 Watts of power, you could power it with
120V,
> 1
> > Amp
> > > >>> > or 240V, 0.5A.
> > > >>> >
> > > >>> >
> > > >>> > Gary McCartney
> > > >>> >
> > > >>> > McCartney Electronics
> > > >>> > 7134 Fife Rd, RR 7
> > > >>> > Guelph Ontario Canada N1H 6J4
> > > >>> > Fax: (519)821-1530
> > > >>> > email: gary (at) number63.ca
> > > >>> >
> > > >>> >
> > > >>> >
> > > >>> >
> > > >>> > gulftech@xxxxxxxx wrote:
> > > >>> >
> > > >>> >>Dear Villy,
> > > >>> >>
> > > >>> >>Most of us know that formula as P =3D IE. Since current is
directly
> > > >>> >>proportional to voltage ( I =3D E/R), an increase in voltage
yields
> a
> > > >>> >>corresponding increase in current with R held constant. If
> current
> > and
> > > >>> >>voltage are both doubled, power is increased by a factor of
4.
> > > >>> >>
> > > >>> >>If I'm wrong, please set me straight.
> > > >>> >>
> > > >>> >>Regards,
> > > >>> >>
> > > >>> >>Ken Smith
> > > >>> >>Gulf Technical Services
> > > >>> >>3034 Gulf Breeze Parkway
> > > >>> >>Gulf Breeze, FL 32563
> > > >>> >>850-934-8324 (Voice) 850-932-0819 (Fax)
> > > >>> >>
> > > >>> >>On Thu, 19 Dec 2002 11:03:37 0000 "Vilhelm Boor"
> > <villyboor@xxxxxxxxx>
> > > >>> >>writes:
> > > >>> >>
> > > >>> >>>Villy boor
> > > >>> >>> Boorelec Durban
> > > >>> >>> When I read some of this I am rather surprised, where were
some
> of
> > > >>> >>>you trained, what happened to Ohms law? Why 2 round prongs.
Most
> > > >>> >>>countries use various combinations of flat pin at various
angles,
> > > >>> >>>Round pins tended to have a bakelite body.
> > > >>> >>> But please remember W=3DIV so the greater V is the less I
will
be
> > so
> > > >>> >>>cables are lighter, plugs can be smaller and fuses lower I.
> Philips
> > > >>> >>>for example make a wide range of TV with an input
requirement
of
> > > >>> >>>from 90V to 270V, just plug it in and its working. I am
sometimes
> > > >>> >>>left speechless, this is your subject and livlihood, you
must
> know
> > > >>> >>>basics.
> > > >>> >>>On Wed, 18 Dec 2002 19:43:29
> > > >>> >>> teltek2 wrote:
> > > >>> >>>
> > > >>> >>>>No...Their 220 does not requite a huge plug like your
> dryer..just
> > 2
> > > >>> >>>>
> > > >>> >>>round
> > > >>> >>>
> > > >>> >
> > > >>> > Tommy Herman
> > > >>> > Herman TV
> > > >>> > 250 School Ave SW
> > > >>> > Taylorsville N.C. 28681
> > > >>> > 828-632-5322 Voice
> > > >>> > 828-632-3880 Fax
> > > >>> > hermantvr@xxxxxxxxxxxxx
> > > >>> > ------------------------------------------
> > > >>> > Submit A Repair Tip For Everyone Here:
> > > >>> > http://www.tech-assist.org/secure/tip/main.html
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> > > >>> >
> > > >>> >
> > > >>> >
> > > >>>
> > > >>>
> > > >>> --
> > > >>> Larry Eastman
> > > >>> American TV & Electronics
> > > >>> Crystal River, Fl.
> > > >>> http://www.tvjunkyard.com
> > > >>>
> > > >>> ------------------------------------------
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