Semiconductor current transformers...?

[Geir Holmavatn]

Hi,

I wonder if there exist simple current transformer solutions using hall
effect devices instead of bulky wound coils. I need to measure current
between 0 and 100amps flowing in 1-phase or 3-phase mains cables. The
units should contain an A/D converter with output to a standard bus,
like for example 1-wire etc..

Has anyone here heard about simple yet relatively accurate (+/- 3%)
current sense devices / solutions with digital output..?

Thanks for comments and info

regards

Geir

 

[Rene Tschaggelar]

Hi,

I wonder if there exist simple current transformer solutions using hall
effect devices instead of bulky wound coils. I need to measure current
between 0 and 100amps flowing in 1-phase or 3-phase mains cables. The
units should contain an A/D converter with output to a standard bus,
like for example 1-wire etc..

Has anyone here heard about simple yet relatively accurate (+/- 3%)
current sense devices / solutions with digital output..?

Thanks for comments and info

http://www.lem.com/

Rene

 

[Phil Allison]

"Geir Holmavatn"

I wonder if there exist simple current transformer solutions using hall
effect devices instead of bulky wound coils. I need to measure current
between 0 and 100amps flowing in 1-phase or 3-phase mains cables. The
units should contain an A/D converter with output to a standard bus, like
for example 1-wire etc..

Has anyone here heard about simple yet relatively accurate (+/- 3%)
current sense devices / solutions with digital output..?

** Did you try Google with

" current transducer digital " ???



....... Phil

 

[Robert Baer]

Hi,

I wonder if there exist simple current transformer solutions using hall
effect devices instead of bulky wound coils. I need to measure current
between 0 and 100amps flowing in 1-phase or 3-phase mains cables. The
units should contain an A/D converter with output to a standard bus,
like for example 1-wire etc..

Has anyone here heard about simple yet relatively accurate (+/- 3%)
current sense devices / solutions with digital output..?

Thanks for comments and info

regards

Geir

Most such devices seem to be SMT ICs that do this job.
I think that DigiKey and Mouser carry a number of them (3-5 makers,
various sensitivities).

 

[qrk]

Hi,

I wonder if there exist simple current transformer solutions using hall
effect devices instead of bulky wound coils. I need to measure current
between 0 and 100amps flowing in 1-phase or 3-phase mains cables. The
units should contain an A/D converter with output to a standard bus,
like for example 1-wire etc..

Has anyone here heard about simple yet relatively accurate (+/- 3%)
current sense devices / solutions with digital output..?

Thanks for comments and info

regards

Geir

http://www.allegromicro.com/en/Products/Categories/Sensors/currentsensor.asp

 

[neon]

go to harborfreight.com they sell it for $8 made in china