Pages: [1]   Go Down
Author Topic: Current Transformers question  (Read 1202 times)
0 Members and 1 Guest are viewing this topic.
Offline Offline
Newbie
*
Karma: 0
Posts: 5
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Hello,
I am trying to monitor my electrical power consumption. for my proof of concept I am using a LEM AT 10 B5. It is perfect because the output is between 0-5V. BUT it is very expensive. Do you have any advice regarding another component ?
I tried a AC1020 from Talema but it was not a success.

I don't want to add any external power for the sensor, the Arduino board is powered by the USB cable.

Thanks for your feedback.

Regards

Fabien
Logged

Peoples Republic of Cantabrigia
Offline Offline
God Member
*****
Karma: 6
Posts: 691
Arduino happiness
View Profile
WWW
 Bigger Bigger  Smaller Smaller  Reset Reset

Check out seeed labs.or iteadstudio, either sells current transformers at very low cost.
Logged

United States (Texas)
Offline Offline
God Member
*****
Karma: 2
Posts: 525
Arduino socks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

http://www.devicecraft.com/haefcuse.html these are pretty neat current sensors. i have 2 of them, they even provide schematics and values so you can re-scale the output to whatever you want. pretty neat, or you can wrap a wire inside them multiple times to scale the range. all they need is +5 volts, ground, and the output is an analog output that varies between 2.5 volts and +5 or gnd. just keep in mind that if you are measuring current in an AC line, the current is going to be oscillating at whatever operating frequency you're working at, so if you just take current measurements whenever, you will get very wrong values. (also note, i am not affiliated with that company, i just like their product)
Logged

0
Offline Offline
Edison Member
*
Karma: 17
Posts: 1407
Arduino rocks
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

I use these, working for some time now and all good.

http://www.ebay.com/itm/SCT-013-030-3-5mm-Output-Split-core-Current-Transformer-/190600906690?pt=AU_B_I_Electrical_Test_Equipment&hash=item2c60b307c2

http://www.ebay.com/itm/20mA-Output-8V-Mutual-Inductor-Current-Transformer-Red-/270851414915?pt=BI_Circuit_Breakers_Transformers&hash=item3f10009b83

http://www.ebay.com/itm/5mA-Output-Leading-Wire-Type-Current-Transformer-Red-/390365278115?pt=BI_Circuit_Breakers_Transformers&hash=item5ae3956fa3

how to connect them?
check here
http://openenergymonitor.org/emon/node/58
Logged

* Si preguntas, pon el código de tu programa, hace mucho mas fácil ayudarte. Y me ahorro un mensaje pidiendo que lo hagas.
* Si consigues solucionar tu problema, dedica unos minutos a explicar en tu post como lo conseguiste para beneficio de todos.
* Cambia el 'Subject' de tu hilo y añade 'SOLUCIONADO' cuando hayas llegado a una solución al problema que planteaste.
* Utiliza un 'Subject' para tu hilo que explique de que va el hilo.
Si estas empezando:
* Comienza a usar Arduino
* Guías de iniciación a Arduino
* Ejemplos
* Referencia del Lenguaje
* Conceptos básicos
Guia de usuario de arduino
Tutoriales en Ingles
Si necesitas que alguien te escriba el código: http://www.freelancer.com/  o esta  http://www.guru.com/

Offline Offline
Newbie
*
Karma: 0
Posts: 5
View Profile
 Bigger Bigger  Smaller Smaller  Reset Reset

Hello
Many thnaks for your answer, yes the purpose is to measure an AC current smiley-sad
I will have a look at "your" site

Regards

Fabien
Logged

Pages: [1]   Go Up
Jump to: