The Rogowski Coil

[Randy Gross]

I am trying to gain a better understanding of the principles of the
Rogowski coil.
I understand that an AC current carrying conductor running through
this coil induces a voltage in the coil proportional to the rate of
change of current in the conductor which can be measured with a DVM.
What I'm having a problem with is the integrator associated with its
use. Is this necessary for frequencies above 60HZ or any range? Can
this coil be calibrated to read say 1vac at 1amp AC 60HZ as a basis
and then be used over a wider range?

Wondering

 

[Randy Gross]

Spec8000.pdf contains a definitive explanation of the Rogowski Coil
except for one ambiguous area: the flexible coil was defined as having
an electrical connection at only one end, which is a bit confusing
because of traditional circuit paths: "Input" and "Output". Have I
misread?

Randy

"Joe" <joe@tech-service.net> wrote in message news:<SaNgd.73757$CT6.45793@sam.nntpserver.com>...

Visit http://www.fact-index.com/r/ro/rogowski_coil.html

or for some rogowski specs http://www.rocoil.cwc.net/Spec8000.PDF


--
Joe
http://www.fcctests.com

"Randy Gross" <aaawelder@yahoo.com> wrote in message
news:d76ab107.0410292116.1945e7b5@posting.google.com...
I am trying to gain a better understanding of the principles of the
Rogowski coil.
I understand that an AC current carrying conductor running through
this coil induces a voltage in the coil proportional to the rate of
change of current in the conductor which can be measured with a DVM.
What I'm having a problem with is the integrator associated with its
use. Is this necessary for frequencies above 60HZ or any range? Can
this coil be calibrated to read say 1vac at 1amp AC 60HZ as a basis
and then be used over a wider range?

Wondering

 

[Joe]

Randy,

From the other website, it describes the rogowski as ...

The Rogowski coil is an electrical device for measuring alternating current
(AC). It consists of a helical coil of wire with the lead from one end
returning through the centre of the coil to the other end, so that both
terminals are at the same end of the coil. The whole assembly is then
wrapped around a straight conductor. A voltage is induced in the coil
proportional to the rate of change of current in the straight conductor.

The Rogowski has an output ... which in the case of the spec8000, it's
permanently attached to the integrator. The input is the electromagnetic
field generated by the current down the conductor which has the rogowski
wrapped around it.

Joe
http://www.fcctests.com

"Randy Gross" <aaawelder@yahoo.com> wrote in message
news:d76ab107.0410312137.7fd428b7@posting.google.com...

Spec8000.pdf contains a definitive explanation of the Rogowski Coil
except for one ambiguous area: the flexible coil was defined as having
an electrical connection at only one end, which is a bit confusing
because of traditional circuit paths: "Input" and "Output". Have I
misread?

Randy

"Joe" <joe@tech-service.net> wrote in message
news:<SaNgd.73757$CT6.45793@sam.nntpserver.com>...
Visit http://www.fact-index.com/r/ro/rogowski_coil.html

or for some rogowski specs http://www.rocoil.cwc.net/Spec8000.PDF


--
Joe
http://www.fcctests.com

"Randy Gross" <aaawelder@yahoo.com> wrote in message
news:d76ab107.0410292116.1945e7b5@posting.google.com...
I am trying to gain a better understanding of the principles of the
Rogowski coil.
I understand that an AC current carrying conductor running through
this coil induces a voltage in the coil proportional to the rate of
change of current in the conductor which can be measured with a DVM.
What I'm having a problem with is the integrator associated with its
use. Is this necessary for frequencies above 60HZ or any range? Can
this coil be calibrated to read say 1vac at 1amp AC 60HZ as a basis
and then be used over a wider range?

Wondering

 

[Randy Gross]

Thanks Joe,

I understand the "Rogowski Coil". I ran across its mention on a site
that was using a light-gas gun in an attempt to compress hydrogen gas
into hydrogen metal. The results of the test were instantaneous and I
could not determine wether the attempt succeeded. The "Rogowski Coil"
was used in the test circuitry.

Randy


"Joe" <joe@tech-service.net> wrote in message news:<0CBhd.84008$CT6.22367@sam.nntpserver.com>...

Randy,

From the other website, it describes the rogowski as ...

The Rogowski coil is an electrical device for measuring alternating current
(AC). It consists of a helical coil of wire with the lead from one end
returning through the centre of the coil to the other end, so that both
terminals are at the same end of the coil. The whole assembly is then
wrapped around a straight conductor. A voltage is induced in the coil
proportional to the rate of change of current in the straight conductor.

The Rogowski has an output ... which in the case of the spec8000, it's
permanently attached to the integrator. The input is the electromagnetic
field generated by the current down the conductor which has the rogowski
wrapped around it.

Joe
http://www.fcctests.com

"Randy Gross" <aaawelder@yahoo.com> wrote in message
news:d76ab107.0410312137.7fd428b7@posting.google.com...
Spec8000.pdf contains a definitive explanation of the Rogowski Coil
except for one ambiguous area: the flexible coil was defined as having
an electrical connection at only one end, which is a bit confusing
because of traditional circuit paths: "Input" and "Output". Have I
misread?

Randy

"Joe" <joe@tech-service.net> wrote in message
news:<SaNgd.73757$CT6.45793@sam.nntpserver.com>...
Visit http://www.fact-index.com/r/ro/rogowski_coil.html

or for some rogowski specs http://www.rocoil.cwc.net/Spec8000.PDF


--
Joe
http://www.fcctests.com

"Randy Gross" <aaawelder@yahoo.com> wrote in message
news:d76ab107.0410292116.1945e7b5@posting.google.com...
I am trying to gain a better understanding of the principles of the
Rogowski coil.
I understand that an AC current carrying conductor running through
this coil induces a voltage in the coil proportional to the rate of
change of current in the conductor which can be measured with a DVM.
What I'm having a problem with is the integrator associated with its
use. Is this necessary for frequencies above 60HZ or any range? Can
this coil be calibrated to read say 1vac at 1amp AC 60HZ as a basis
and then be used over a wider range?

Wondering