Converting 0-2200Vac to 0-10VDC

[Rich Grise]

I am designing a circuit which will convert a 0 to 2200Vac, 50/60Hz
voltage to 0-10VDC signal.

Designing a transformer with 2200Vac primary and 10Vac secondary is
one solution, but the transformer will be very bulky!!

Any other good ideas are welcome. Please help!

When you say, "0-2200Vac", do you mean one line at 0 and the other
at 2200VAC, or do you mean that the RMS value of the incoming
ACV can be in a range from zero to 2200V?

Thanks,
Rich

 

[Rich Grise, Plainclothes Hippie]

I am designing a circuit which will convert a 0 to 2200Vac, 50/60Hz
voltage to 0-10VDC signal.

Designing a transformer with 2200Vac primary and 10Vac secondary is
one solution, but the transformer will be very bulky!!

Any other good ideas are welcome. Please help!

What other loads are on it? What kind of wiring is open to the
public?

You could just drape a wire over the transformer and feed a 7-8V
pk-pk AC Transorb. ;-)

Have Fun!
Rich

 

[Rich Grise]

I want only a signal which will linearly change from 0 to 10VDC for a
corresponding input of 0 to 2200Vac.
The current rating of the output can be as low as 50mA.

At what frequency?

Thanks,
Rich

 

[Rich Grise]

I want to have a 0-10VDC signal, may be 50mA is sufficient.

I want to sense 0 to 2200Vac and want to display on a meter, with say
0-10V signal. Current rating is not important.

Get a HV probe for your DVM.

Or, a voltage divider:

0-2200Vac >-----------+
|
[R = 2190M]
|
+-------- 0-10Vac
|
[R = 10M]
|
0- 2200Vac Ret.-------+------- 0-10Vac Ret.

Hope This Helps!
Rich

 

[Rich Grise]

On Tue, 23 Oct 2007 00:18:34 -0700, Devendra wrote:
[snip]
Pay no attention to Phil Allison - he's a troll.

This is not as a hobby.... it is requirement of my project and I have
to come-up with a cost effective solution.
Please don't get angry and suggest something which can be a permanent
solution.

The most cost-effective solution is a high-voltage probe, off the
shelf. You would never be able to build something like that from
scratch for anywhere near the same money. (i.e., think 10X to start.)

Oscilloscope probes.... how to keep them fixed to a sensing point,
once for all?

It depends on too much stuff - first, buy a probe, post the spec,
and find a way to post some pix of it and where it has to be mounted.

Good Luck!
Rich

 

[Rich Grise]

I agree with Phil. We are angry and you should shape up or PISS OFF.

Googlies have no authority here. This is USENET.

You will learn to behave yourself, or you will learn what happens to
self-righteous twits when they play with the Big Boys.

Good Luck!
Rich

 

[Jamie]

I am designing a circuit which will convert a 0 to 2200Vac, 50/60Hz
voltage to 0-10VDC signal.

Designing a transformer with 2200Vac primary and 10Vac secondary is
one solution, but the transformer will be very bulky!!

Any other good ideas are welcome. Please help!

Thanks & Best Regards,
Devendra

apparently, you need a control reference. for this,
you really do need a potential transformer to
be safe about it how ever, You can use a resistor divider
network that would drive a simple PWM circuit with isolated
dc power supply driving an opto coupler. The other side would
simply reform the signal.

I did this to isolate a signal reference from a 0..60kVDC
HI-POT unit.
We used a oil fill can that house the resistor network for
cooling. Had a stand alone DC supply via a Xformer with TVS
diodes for protection which operated the sensing from the divider
to drive the Optical system with PWM.
On the other end, it was all basic electronics from the photo
detector. We didn't use any popular opto's. We simply formed one
of our own in a non transparent tube for the sender and receiver.
that gave us the space to guaranty no arc over.

 

[Jamie]

I want to have a 0-10VDC signal, may be 50mA is sufficient.

I want to sense 0 to 2200Vac and want to display on a meter, with say
0-10V signal. Current rating is not important.

THey already make them.
Look for potential transformer.

 

[Jamie]

I want to have a 0-10VDC signal, may be 50mA is sufficient.

I want to sense 0 to 2200Vac and want to display on a meter, with say
0-10V signal. Current rating is not important.

Get a HV probe for your DVM.

Or, a voltage divider:

0-2200Vac >-----------+
|
[R = 2190M]
|
+-------- 0-10Vac
|
[R = 10M]
|
0- 2200Vac Ret.-------+------- 0-10Vac Ret.

Hope This Helps!
Rich

You do realize you need to calculate the load factor of the
meter attached? or load any ways.
most meters are 10 megs input, that is, if you're using a DMM.
also, the capacitance loading even at 50/60 hz with that much R will
effect the math.

Oh well, just an observation.
I was told the other day that men from maine are brainless. Then I
made common that I was originally from Maine. Room got quiet. So if that
statement is true, just ignore me!

 

[Jamie]

Googlies have no authority here. This is USENET.

You will learn to behave yourself, or you will learn what happens to
self-righteous twits when they play with the Big Boys.

Good Luck!
Rich

LOL!

 

[Ken Fowler]

Path:
border1.nntp.dca.giganews.com!nntp.giganews.com!postnews.google.com!z24g2000prh.googlegroups.com!not-for-mail
From: Devendra <[email protected]>
Newsgroups: sci.electronics.design
Subject: Converting 0-2200Vac to 0-10VDC
Date: Mon, 22 Oct 2007 21:55:55 -0700
Organization: http://groups.google.com
Lines: 11
Message-ID: <[email protected]>
NNTP-Posting-Host: 59.144.47.217
Mime-Version: 1.0
Content-Type: text/plain; charset="iso-8859-1"
X-Trace: posting.google.com 1193115355 21321 127.0.0.1 (23 Oct 2007 04:55:55 GMT)
X-Complaints-To: [email protected]
NNTP-Posting-Date: Tue, 23 Oct 2007 04:55:55 +0000 (UTC)
User-Agent: G2/1.0
X-HTTP-UserAgent: Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR
1.1.4322),gzip(gfe),gzip(gfe)
X-HTTP-Via: 1.0 nordson:3128 (squid/2.5.STABLE6)
Complaints-To: [email protected]
Injection-Info: z24g2000prh.googlegroups.com; posting-host=59.144.47.217;
posting-account=ps2QrAMAAAA6_jCuRt2JEIpn5Otqf_w0
Bytes: 1402
Xref: number1.nntp.dca.giganews.com sci.electronics.design:853492

I am designing a circuit which will convert a 0 to 2200Vac, 50/60Hz
voltage to 0-10VDC signal.

Designing a transformer with 2200Vac primary and 10Vac secondary is
one solution, but the transformer will be very bulky!!

Any other good ideas are welcome. Please help!

Thanks & Best Regards,
Devendra

I think you should avoid any direct connection of resistive divider networks to that high a voltage.
If
the divider flashes over, your measurement device may rise to 2200 Volts. There are transformers
designed
for voltages like this called Control Transformers which step the 2200 Volts down to 120 Volts. You
could
connect a Variac (variable autotransformer) across the 120 Volt secondary and adjust the variac for
an
output of 10 Volts. Actually, you could use any transformer which steps up 120 Volts to 2000 to
2500
Volts. Connect the HV Secondary to your 2200 Volt line. Be cautious and careful!

Ken Fowler

 

[Phil Allison]

"Ken Fowler"

I think you should avoid any direct connection of resistive divider
networks to that high a voltage.

** Funny how 40kV and 100:1 scope probes work so well then.

If the divider flashes over,

** This is a big " If ".

A correctly designed divider has zero chance of doing that.

There are transformers designed for voltages like this called
Control Transformers which step the 2200 Volts down to 120 Volts.

** Way out of the OP's meagre 10 cent budget.

You could connect a Variac (variable autotransformer) across the
120 Volt secondary and adjust the variac for an output of 10 Volts.

** What a bizarre thing to do - when the OP wants 0-10 DC to track
0-2200 AC.

All he needs is a rectifier ( precision or rms to DC ) and a voltage
divider.

Actually, you could use any transformer which steps up 120 Volts to 2000
to
2500 Volts.

** Like they grow on trees too.




....... Phil

 

[Rich Grise]

Oh well, just an observation.
I was told the other day that men from maine are brainless. Then I
made common that I was originally from Maine. Room got quiet. So if that
statement is true, just ignore me!

All men have two brains. The trouble is in figuring out which one to use. ;-)

Cheers!
Rich

 

[Jamie]

All men have two brains. The trouble is in figuring out which one to use. ;-)

Cheers!
Rich

I do have problems with that at times!