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In what ways can a transformer fail....?

R

Ross Herbert

Jan 1, 1970
0
On Sun, 18 Feb 2007 15:55:19 +1100, "Phil Allison"


Phil, I will respond only to your comment regarding what Iposted in my
first response. Everything else snipped.
** Naturally - in order to correct the error YOU posted then later tried
to fallaciously prove was right.

This one:

" I have seen mains transformers of this type in only a few items of
equipment. Usually more expensive than other more common types but P -
S isolation is absolute and makes them very safe for medical
equipment."


Grow up - Ross.

The fact is that R-Core transformers ARE inherently safe for use in
medical equipment due to the isolation properties of the R-Core
bobbin. This does not mean that split-bobbin types on E-I transformers
cannot be safe for such use. Other factors related to the R-Core
design and winding arrangement do make these transformers a better
choice for such equipment when compared to E-I.

R-Core bobbins are far more complex than a split-bobbin for an E-I
transformer, thus contributing to greater cost for this type. The
interleaved windings using an isolating barrier contibutes to better
coupling and lower noise than an E-I but at greater overall cost of
manufacture.

I have posted links on ABSE to pics of a typical R-Core bobbin. If you
want more I can post them as well.
 
P

Phil Allison

Jan 1, 1970
0
"Ross Herbert the LIAR "
Phil, I will respond only to your comment regarding what Iposted in my
first response. Everything else snipped.


** How utterly DISHONEST !!!!!!!!!!!!

You did that ONLY so you can COMPLETELY change the context from the
original one.

You abominable bloody LIAR !!


The fact is that R-Core transformers ARE inherently safe for use in
medical equipment due to the isolation properties of the R-Core
bobbin.


** Not the original issue and NOT true anyhow.

The P - S isolation is NOT " absolute " ( ie on opposite sides of the
core) as you wrote and tried to later prove with fallacious quotes.

Also, medical grade transformers are required to meet class 2 construction
requirements. Plastic bobbins that melt and collapse at under 200C are not
ever close to meeting that.


Your initial post contained a serious error that needed to be corrected

So I politely did so.

No sign of YOU thinking the matter through at all.

Grow up anytime - Ross.

And you posted that false impression in contradiction of my earnest
attempts to correct your original error.

You were wrong, stubborn and rude about it too.

Grow up anytime & take responsibility for your actions.

How typically dishonest of YOU to ignore and want others to ignore
your posting of serious misinformation.

Piss off and do something useful - Ross.

Like checking out those illegal 2 core IEC leads that are in nearly every
hobby shop in Perth and reporting them to that fellow in the dept.




....... Phil
 
R

Ross Herbert

Jan 1, 1970
0
On Sun, 18 Feb 2007 17:19:59 +1100, "Phil Allison"

SNIP
Piss off and do something useful - Ross.

Like checking out those illegal 2 core IEC leads that are in nearly every
hobby shop in Perth and reporting them to that fellow in the dept.

As I recall, I did far more in that regard than you ever did. The
sample cord you sent me was taken to the Consumer Protection agency
for their perusal and they actually went around stores and took
samples to determine the extent of the problem. As a result they
issued a warning to all stores likely to carry such cords. As you well
might realise, even in your totally demented state of mind, such
warnings last as long as the follow-up inspections are implemented -
which never seem to occur. I am certainly not going to waste my time
checking out stores to see if they carry illegal IEC cords. Why don't
you do something off your own bat for a change?
 
P

Phil Allison

Jan 1, 1970
0
"Ross Herbert"
"Phil Allison"
As I recall, I did far more in that regard than you ever did.


** Then you recall wrongly - you fucking nut case.

I am certainly not going to waste my time
checking out stores to see if they carry illegal IEC cords.


** Shame you have not kept up with the thread on "aus.electronics":

"Dodgy IEC leads - still being supplied ".

Hobby stores in Perth are known to be selling the Chinese made " Swallow 2"
AC/CD battery charger with an illegal IEC lead. The unit is imported and
distributed by "Model Engines " in Melbourne.

Find any hobby store with one in stock ( a few phone calls will do that )
and just ask to see it.

The you know the guy to see about it.




....... Phil
 
R

Ross Herbert

Jan 1, 1970
0
"Ross Herbert"
"Phil Allison"



** Then you recall wrongly - you fucking nut case.

Phil, it always amazes me why you seem to delight in displaying your
completely irrational and erratic behaviour by attempting to vilify
and denigrate other people. I ask you, what do you get out of it? Even
when people respond to you in a civil manner without any countering
remarks the equal of your own, you go off your trolley and just can't
seem to avoid all the vile expletives and derogatory remarks which do
nothing else but show you up to be nothing but a vile, vituperous,
vicious and thoroughly dislikeable person who deserves the contempt of
every other poster on these groups. When you are calm and rational,
your comments are welcome, but that never seems to last very long.

"By your works ye shall be known"

** Shame you have not kept up with the thread on "aus.electronics":

"Dodgy IEC leads - still being supplied ".

Hobby stores in Perth are known to be selling the Chinese made " Swallow 2"
AC/CD battery charger with an illegal IEC lead. The unit is imported and
distributed by "Model Engines " in Melbourne.

Find any hobby store with one in stock ( a few phone calls will do that )
and just ask to see it.

The you know the guy to see about it.

Oh, I have been following the thread, I just wanted to see what you
were going to do yourself.

I notice that you have only now:

"just checked a local shop who took a new delivery of Swallow AC/DC
chargers from Model Engines just this week - they contain the dodgy
leads -"

"I've started talking to one local regulator, but what I want to see
is a recall -"

When I took my concerns to the authorities it was several years ago -
you have only just started to get involved on a similar level. I will
fire off an email to the authorities to let them know about the
Swallow charger cords from Model Engines.
 
P

Phil Allison

Jan 1, 1970
0
"Ross Herbert"


( snip the cretin's asinine bullshit)


Oh, I have been following the thread, I just wanted to see what you
were going to do yourself.

I notice that you have only now:

"just checked a local shop who took a new delivery of Swallow AC/DC
chargers from Model Engines just this week - they contain the dodgy
leads -"

"I've started talking to one local regulator, but what I want to see
is a recall -"


** What fucking planet are you on - Ross ??

Those words are from an anonymous poster called "Poxy".

He is acting on my recommendations.


When I took my concerns to the authorities it was several years ago -
you have only just started to get involved on a similar level.


** What a monstrous lie.

I discovered and raised that matter with the NSW authority long before YOU
came along.

Then, at your request, mailed YOU the offending piece of cable for
examination.

Ross - you are completely INSANE !!!!!



I will
fire off an email to the authorities to let them know about the
Swallow charger cords from Model Engines.


** You will need to find at least one shop with the illegal stock first.

That charger needs to re-examined for compliance too.



........ Phil
 
M

MassiveProng

Jan 1, 1970
0
"Christian Treldal"





** Just love to have the same odds on lotto.

Yes, but you are so stupid, you'd still lose, or throw away a
winning ticket.
Short the secondary winding and both it and the primary will heat to
combustion temperatures - as they have very similar heat dissipations.

Hahahahah... A good transformer can handle maximum loading.
Ordinary plastic or paper insulation used to separate them from the core
fails when burned.


Except that NO "ordinary" paper is used. VERY SPECIFIC paper,
called transformer paper or "Nomex" is used, and it typically has
about 1500V/mil breakdown/puncture resistance.

Most transformers these days have bobbins as well.
Carbon soot conducts electricity.

No shit? Is there any other kind of soot, dumbass?
Humans die with as little as 35 mA flow between hands.

The term would be "across the chest" as one leg and an arm will do
as well.
Nothing a dumb kraut ham would comprehend.


You are one retarded ****, boy. Somebody down there oughta whopp
you upside da haed.
 
M

MassiveProng

Jan 1, 1970
0
The safest transformer design I have seen is that used by Signal
Transformer


The best available. They really do know their stuff.
 
P

Phil Allison

Jan 1, 1970
0
"MassivePrick"

Hahahahah... A good transformer can handle maximum loading.


** But not a massive short - however.

What a ignorant macaroon !!


Except that NO "ordinary" paper is used. VERY SPECIFIC paper,
called transformer paper or "Nomex" is used, and it typically has
about 1500V/mil breakdown/puncture resistance.


** It burns if the wire insulation does - you fucking half wit.

Most transformers these days have bobbins as well.


** Which melt and burn like any plastic.

None of these materials are fire proof.




......... Phil
 
M

MassiveProng

Jan 1, 1970
0
"MassivePrick"



** LOL !!

What a macaroon !!

ALL transformers have gapped cores. For you to not know this makes
you the moron, dipshit.
 
M

MassiveProng

Jan 1, 1970
0
** It burns if the wire insulation does - you fucking half wit.


You're an idiot. The paper used in transformers does not burn at
the same temperature as the mag wire enamel does.

You are a fucking retard for declaring them to be constructed with
"ordinary plastic and paper.

The only thing ordinary is your stupidity. You are ordinarily
wrong.
 
P

Phil Allison

Jan 1, 1970
0
"MassivePrick"
"MassivePrick"

ALL transformers have gapped cores.


** Shame about toroidals and R cores...........


The windings (on each side) are what are interconnected

- YOU FUCKING MORON .




.......... Phil
 
P

Phil Allison

Jan 1, 1970
0
"MassivePrick the ASININE DONKEY BRAIN "

You're an idiot. The paper used in transformers does not burn at
the same temperature as the mag wire enamel does.


** It sure does - you IDIOT.


You are a fucking retard for declaring them to be constructed with
"ordinary plastic and paper.


** Shame how most of them are - YOU FUCKING MORON .

Stuff that melts and combusts very easily.




........ Phil
 
E

Eeyore

Jan 1, 1970
0
MassiveProng said:
ALL transformers have gapped cores. For you to not know this makes
you the moron, dipshit.

Where's the gap in a toroid, O-core, R-core ?

Graham
 
E

Eeyore

Jan 1, 1970
0
MassiveProng said:
You're an idiot. The paper used in transformers does not burn at
the same temperature as the mag wire enamel does.

What transformers use paper these days ? Is it UL listed paper ?

You are a fucking retard for declaring them to be constructed with
"ordinary plastic and paper.

Ahh, it was Phyllis's idea was it ?

The only thing ordinary is your stupidity. You are ordinarily wrong.

You tell him.

Graham
 
P

Phil Allison

Jan 1, 1970
0
"Eeysore"
Ahh, it was Phyllis's idea was it ?


** The quote is:

" Ordinary plastic or paper insulation used to separate them from the core
fails when burned. "

"Ordinary" here = the commonly used materials

- ie not special fire-proof materials like Kapton or fibre sheet.


MassivePrick is a MALICIOUS PSYCHOTIC ****




........ Phil
 
M

MassiveProng

Jan 1, 1970
0
"MassivePrick"


** Shame about toroidals and R cores...........

Yes. It is built into the particles that make up the core.
The windings (on each side) are what are interconnected

Not on transformers which have isolated windings, dipshit.
- YOU FUCKING MORON .

We know you are, but we know you are.
......... Phil, the absolute idiot, and total Usenet troll.

Yep, that's you.
 
M

MassiveProng

Jan 1, 1970
0
** It sure does - you IDIOT.

Next thing, you'll be trying to say that it has a flashpoint of 454
degrees F.

You'd be wrong about that. It is NOT ordinary paper. The only
thing about it that gives it the moniker "paper" is its shape.

It has a MUCH higher flashpoint, dumbass.

Google Nomex, retard boy.
 
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