Potential Transformer

[Phil Allison]

"John Larkin

** Big noting yourself like this does not work with me.

In fact, it makes you look like a pathetic jerk.

Why would I care how I look to you?

** Missed the point - yet again.

What a complete goose.

You might be a tad more specific.

** I have been as specific as possible.

Better re-read the thread.

So how does the shape of the core
affect the available Bmax?

** More of Larkin's red herrings.

So the posturing clot has no knowledge of toroidal transformers either.

Sure. Most any AC power transformer will make a decent PT for
metering.

** Now the posturing clot comes around full circle.

Yawn.

And this is a school project...

** No it is not.

Try reading the OP's post properly.

Try reading any of mine properly.

Make a nice change.




........... Phil

 

[John Larkin]

** No it is not.

Try reading the OP's post properly.

Are you insulting the South Dakota School of Mines and Technology?
That's not nice.

John

 

[John Popelish]

"John Popelish"


** That is purest gobbledegook.

The term "voltage regulation" when referring to transformer is related to
load.

The term you needed and should have used was was " voltage linearity" .

Thank you.

 

[John Popelish]

"John Popelish"





** Shame you gave a fallacious reason.

Good thing the true one is now posted.

(hanging head in shame)-;

 

[Phil Allison]

"John Larkin"

** Ass.

 

[John Larkin]

Hello all!

I am currently working on my senior design project of a Digital
Power Meter here at the South Dakota School of Mines and Technology
(Shamless plug!). I plan to measure and display Voltage, Current, Power
and Power Factor. To do this I plan to sample both waveforms and
calculate the rest. I have found a Hall Effect type current sensing
chip. While I have found a few 120V-5V PT's my personal requirements
are 230V 10A. Potential Transformers that accomplish this feat seem to
be a little more rare. Does anyone out there know of somewhere I can
find some of these? Small size would also be desired.


P.S.: Gimme a JOB! B.S. EE minor:CSC

Transformers aside, what sort of sample rates do you plan to run? Will
you sample E and I simultaneously, or is there a single mux'd ADC? Any
ideas on processing algorithms?

Getting an electronic meter to, say, the accuracy and dynamic range of
a rotating-disk meter is surprisingly difficult; those puppies have
probably had thousands of engineer-years applied to their development,
and they are *good*.


John

 

[John Larkin]

"John Larkin"

** Ass.

Does that mean it's *not* a school project?

John

 

[Kit Talich]

Oh yes, sorry I failed to mention that another restriction I have set
was to work strictly on 50-60Hz. Thus allowing the use of a PIC to
sample the waveforms of each. This project ultimatly would be used to
replace the current older wattmeters used in our labs. Thanks again!

 

[Kit Talich]

This is a senior design project. To graduate we must design and build a
product to graduate... so it is more like a project for school

 

[Joseph2k]

This is a senior design project. To graduate we must design and build a
product to graduate... so it is more like a project for school

Thank you Kit (OP), you put that stink fight to bed (without dessert).

 

[John Larkin]

Oh yes, sorry I failed to mention that another restriction I have set
was to work strictly on 50-60Hz.

That makes the choice of sample rate much more interesting. The math
here gets fun, relative primes and stuff, especially if you intend to
display RMS current.

John