C
chas
Guest
Checkiing to buy a transformer, I see most of them don't publish the output
amps but do give a stat 'VA'. Is this just wattage?. .. .chas
amps but do give a stat 'VA'. Is this just wattage?. .. .chas
P
Phil Allison
Guest
"chas"
VA and watts are the same only if the load is resistive, like incandescent
lamps.
By using VA , the makers are letting you know that a transformer can deliver
a certain load current in RMS amps and no more.
It is possible for the watts actually delivered to the load to be zero, if
the load is a pure capacitance or inductance, and the tranny is still
operating at its max safe current.
..... Phil
** Generally no.
VA and watts are the same only if the load is resistive, like incandescent
lamps.
By using VA , the makers are letting you know that a transformer can deliver
a certain load current in RMS amps and no more.
It is possible for the watts actually delivered to the load to be zero, if
the load is a pure capacitance or inductance, and the tranny is still
operating at its max safe current.
..... Phil
L
Larry
Guest
"chas" wrote in message news:X3mks.20397$c16.19602@newsfe10.iad...
Checkiing to buy a transformer, I see most of them don't publish the output
amps but do give a stat 'VA'. Is this just wattage?. .. .chas
***
Volt Amp
http://lmgtfy.com/?q=volt+amp
Checkiing to buy a transformer, I see most of them don't publish the output
amps but do give a stat 'VA'. Is this just wattage?. .. .chas
***
Volt Amp
http://lmgtfy.com/?q=volt+amp
T
Tim Wescott
Guest
On Wed, 31 Oct 2012 21:27:21 -0600, chas wrote:
The core cares about the voltage and the frequency.
The windings care about the RMS current.
So the transformer is rated by "VA" -- it's your job to know how much of
that you're going to waste in inefficiencies, and how much you're
actually going to extract from the secondary.
--
My liberal friends think I'm a conservative kook.
My conservative friends think I'm a liberal kook.
Why am I not happy that they have found common ground?
Tim Wescott, Communications, Control, Circuits & Software
http://www.wescottdesign.com
The transformer doesn't care what power is traveling through it.
The core cares about the voltage and the frequency.
The windings care about the RMS current.
So the transformer is rated by "VA" -- it's your job to know how much of
that you're going to waste in inefficiencies, and how much you're
actually going to extract from the secondary.
--
My liberal friends think I'm a conservative kook.
My conservative friends think I'm a liberal kook.
Why am I not happy that they have found common ground?
Tim Wescott, Communications, Control, Circuits & Software
http://www.wescottdesign.com
P
Phil Allison
Guest
"Tim Wescott"
** Really ??
I suspect practical examples very much do.
.... Phil
** Really ??
I suspect practical examples very much do.
.... Phil
T
Tim Wescott
Guest
On Thu, 01 Nov 2012 20:33:52 +1100, Phil Allison wrote:
maximum voltage, frequency, and maximum current. So no, I don't see
where it makes a difference to the _transformer_ whether you're getting
no power out of it at rated voltage and current, or if you've managed to
achieve a power factor of 1 and have P = VA.
_Circuit designers_ care what power is going through the transformer,
which is why we pay attention to how much of the current is actually
going to carrying power, why we favor some circuits over others, or at
least why we seemingly over-specify transformers compared to the
specifications of the power supplys that they're in.
--
Tim Wescott
Control system and signal processing consulting
www.wescottdesign.com
I have yet to see a transformer that's rated for power in addition to
maximum voltage, frequency, and maximum current. So no, I don't see
where it makes a difference to the _transformer_ whether you're getting
no power out of it at rated voltage and current, or if you've managed to
achieve a power factor of 1 and have P = VA.
_Circuit designers_ care what power is going through the transformer,
which is why we pay attention to how much of the current is actually
going to carrying power, why we favor some circuits over others, or at
least why we seemingly over-specify transformers compared to the
specifications of the power supplys that they're in.
--
Tim Wescott
Control system and signal processing consulting
www.wescottdesign.com
P
Phil Allison
Guest
"Tim Wescott"
** What a pile of fucking irrelevant crap !!!
Read what you actually wrote - shithead.
It is UTTERLY WRONG.
..... Phil
** What a pile of fucking irrelevant crap !!!
Read what you actually wrote - shithead.
It is UTTERLY WRONG.
..... Phil
P
Phil Allison
Guest
"Jamie" = radio ham moron: Maynard A. Philbrook
** Fuck off and die
- you stinking pile of AUTISTIC septic shit.
** Fuck off and die
- you stinking pile of AUTISTIC septic shit.
J
Jamie
Guest
Phil Allison wrote:
with that statement.
I know you guys down under have a totally different understanding
mechanism but come on now, is it really that bad?
Jamie
Phil, I think you better read it closer yourself, Tim has outwitted you
with that statement.
I know you guys down under have a totally different understanding
mechanism but come on now, is it really that bad?
Jamie
T
Tim Wescott
Guest
On Fri, 02 Nov 2012 11:06:04 +1100, Phil Allison wrote:
--
Tim Wescott
Control system and signal processing consulting
www.wescottdesign.com
Take your meds.
--
Tim Wescott
Control system and signal processing consulting
www.wescottdesign.com
P
Phil Allison
Guest
"Tim Wescott"
** That is a REALLY STUPID and fowl remark.
There is NO medication on earth that cures what YOU have - asshole !!
FFS : READ WHAT YOU WROTE !!!!!!!!!!!!!!!!!!!!!!!!!!!
What does it fucking say ???????
-------------------------------------------------
Here it is again - you fucking, posturing TWAT
--------------------------------------------------
** Still got no idea how STUPID it is to say that ???
Transformers can pass infinite amounts of power can they ?????
FFS, dickwad:
1. Learn to write clear English.
2. Learn to READ what others are REALLY asking and saying.
3. Learn to fucking READ what you write yourself for the MOST OBVIOUS
meaning.
Now - fuck off usenet entirely until you can do all three.
I expect to see ya back not earlier than next century.
Shithead.
.... Phil
** That is a REALLY STUPID and fowl remark.
There is NO medication on earth that cures what YOU have - asshole !!
FFS : READ WHAT YOU WROTE !!!!!!!!!!!!!!!!!!!!!!!!!!!
What does it fucking say ???????
-------------------------------------------------
Here it is again - you fucking, posturing TWAT
The transformer doesn't care what power is traveling through it.
--------------------------------------------------
** Still got no idea how STUPID it is to say that ???
Transformers can pass infinite amounts of power can they ?????
FFS, dickwad:
1. Learn to write clear English.
2. Learn to READ what others are REALLY asking and saying.
3. Learn to fucking READ what you write yourself for the MOST OBVIOUS
meaning.
Now - fuck off usenet entirely until you can do all three.
I expect to see ya back not earlier than next century.
Shithead.
.... Phil
G
George Herold
Guest
On Nov 2, 3:53 am, "Phil Allison" <phi...@tpg.com.au> wrote:
to mean the above. But I had no trouble understanding what Tim was
saying. (And I'm far from a transformer expert.)
George H.
Geesh Phil, I guess you can take Tim's line out of context and take it
to mean the above. But I had no trouble understanding what Tim was
saying. (And I'm far from a transformer expert.)
George H.
P
Phil Allison
Guest
"George Herold"
I guess you can take Tim's line out of context
** FFS I quoted the **ENTIRE** context !!!
Piss off, idiot.
..... Phil
I guess you can take Tim's line out of context
** FFS I quoted the **ENTIRE** context !!!
Piss off, idiot.
..... Phil
J
Jim Thompson
Guest
On Mon, 5 Nov 2012 23:03:15 +0000 (UTC), Cydrome Leader
<presence@MUNGEpanix.com> wrote:
most of the time >:-}
...Jim Thompson
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice
480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
I love to cook with wine. Sometimes I even put it in the food.
<presence@MUNGEpanix.com> wrote:
"fowl" is how Phil spells "foul" when he's off his med's... which is
most of the time >:-}
...Jim Thompson
--
| James E.Thompson, CTO | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC's and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice
480)460-2350 Fax: Available upon request | Brass Rat || E-mail Icon at http://www.analog-innovations.com | 1962 |
I love to cook with wine. Sometimes I even put it in the food.
P
Phil Allison
Guest
"Cydrome Leader"
** Why not address the issue instead of trolling ?
Or is the latter ALL you are capable of ?
( Rhetorical questions )
** Why not address the issue instead of trolling ?
Or is the latter ALL you are capable of ?
( Rhetorical questions )
C
Cydrome Leader
Guest
Phil Allison <phil_a@tpg.com.au> wrote:
about, and how it applies to your steps 1, 2 and 3.
holy smokes. I want to know more about the "fowl remark" you're talking
about, and how it applies to your steps 1, 2 and 3.
Guest
On Mon, 5 Nov 2012 23:35:59 +0000 (UTC), Cydrome Leader
<presence@MUNGEpanix.com> wrote:
Phyllis and Slowman are descendents.
<presence@MUNGEpanix.com> wrote:
http://history.dircsa.org.au/1800-1899/lunatic-asylum/
Phyllis and Slowman are descendents.
C
Cydrome Leader
Guest
Jim Thompson <To-Email-Use-The-Envelope-Icon@on-my-web-site.com> wrote:
he seems like a touchy fellow. Anybody know his story?
M
Michael A. Terrell
Guest
Jim Thompson wrote:
And he 'fowls' his nest? ;-)
And he 'fowls' his nest? ;-)
M
Michael A. Terrell
Guest
krw@att.bizzz wrote:
True, and they can't go any lower.
True, and they can't go any lower.