Hello guys, can i ask if it possible to get data from OPCT10AL Current Transformer Open Type Split Type connected to a ACS712 30a sensor? my initial thinking about this is plug the the positive and negative terminals of the current transformer into the ip+ and ip- of the acs712 module. Is it possible? also the sensors are connected to WifiLora 32 v3 if you're asking for its microcontroller. Thanks!
Current transformers (CT) and the ACS712 current sensor use very different techniques to measure current. CTs are much safer to use because there is no electrical connection to the AC line.
To learn how to use a CT with Arduino, I strongly recommend the OpenEnergyMonitor tutorial.
https://docs.openenergymonitor.org/electricity-monitoring/ct-sensors/interface-with-arduino.html
Thanks for the help sir i've been thinking about the safety cause i dont know if the acs712 can withstand the 500V below machines. Do you have an idea about this one?
Also i've been thinking if i can combine the ct with the acs712 module for safety and less interations with the terminals.
is for AC only. its current is in mA range
Yup i will be measuring ac current of a motor, can i use values that indicate its ampere in mA?
Hire a professional electrical engineer and certified industrial electricians to design and install equipment for such extremely dangerous machinery.
By asking this question, it is clear that you are not qualified for this project. This is NOT an Arduino project.
Thankyou for informing me, This project is our thesis and i'll be keeping in mind the thing you said its true that with these voltage i've encountering i'll be needing help with professionals.
1 Like
@jim_jim ,
Your other topic on the same subject deleted.
Please do not duplicate your questions as doing so wastes the time and effort of the volunteers trying to help you as they are then answering the same thing in different places.
Please create one topic only for your question and choose the forum category carefully. If you have multiple questions about the same project then please ask your questions in the one topic as the answers to one question provide useful context for the others, and also you won’t have to keep explaining your project repeatedly.
Repeated duplicate posting could result in a temporary or permanent ban from the forum.
Could you take a few moments to Learn How To Use The Forum
It will help you get the best out of the forum in the future.
Thank you.
Thankyou sir for informing me! Im not used to this platform yet but rest assured, i'll be minding my future posts here.
Some of the OPCT10L CT are voltage output so it would make no sense to connect them to a current measuring device. It also would also make no sense to connect the current output version since the output would be reduced by a factor of 1000:1
So which version do you have, voltage or current output?
Sir, right now i dont have either the voltage or the current output, im just wondering which one will be safer and hassle free when measuring ac machine current. Thankyou for responding!
Either voltage or current output OPCT10AL would work, no need for the ACS712.
The only difference between the voltage and current output versions is that the voltage output version has the burden resistor built in, not a big advantage, it just saves you from buying one resistor.
If you buy the current output version make sure the data sheet specifies the value of the burden resistor to use.
Much appreciated Sir! I'll be considering this, Thanks!
Just to add to all of the fine advice provided if this is an industrial application which I assume it is I would be thinking about using a current transducer rather than a current transformer or anything ACS712. You make no mention if you want either Average responding or true RMS responding? Anyway I have used products from CR Magnetics in the past for current transducer applications. Other manufacturers make similar transducers. Next the transducers come in single and poly phase versions.
Any quality current transformer should have a complete data sheet. That includes the system voltage.
I also have no idea why you want to pair an ACS 712 with a CT when a properly ranged CT alone should get you what you want, motor current. The resistor placed across a CT is known as a burden resistor.
Again for a commercial industrial application I would be looking at current measurement designed around your application including CT range rather than one size fits all.
Ron
Will considering this suggestion Sir, Thankyou!
Forget about the ACS712.
It shouldn't be used with voltage over 185volt AC (see datasheet).
And it doesn't play nicely with an ESP32 (the board you're using).
A current transformer and a few external parts is all you need.
Leo..