how to Which Voltage Sensor can measure ac1000v on arduino ??????
Hello choudharysaab
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It's hard to take people serious with "How to Which" "measure ac1000v" and "??????"
Well actually I do take the measure ac1000v part serious, who are you going to get killed?
Hi, @choudharysaab
Welcome to the forum.
https://forum.arduino.cc/t/how-to-get-the-best-out-of-this-forum
What is your project/application?
Tom... 
No, I am assuming 1000V. But I have to measure 3 phase volts means 450/500 AC
No, I am assuming 1000V. But I have to measure 3 phase volts means 450/500 AC
Sounds like three phase 440 or 480. There is approved qualified instrumentation to make these measurements, why take a chance on making or killing yourself or somebody else to save a few dollars. I see no indication you have the experience to do something like this, is this a beginner or school project? Probably one of the most important things you can do before proceeding is to study ARC FLASH and how to avoid it, it may save you from a lot of damage.
440 or 480. Can it be measured with ZMPT101B if it is Single Phase Voltage?
Reading and studying the data sheet could help here, couldn't it?
I suggest you spend some time understanding what you are working with. For your safety and others I am backing out of this and will not be answering this question as you obviously do not have a background in this arena to be safe.
You measure the voltage between TWO points on your circuit. Can you tell us WHERE you will be measuring the voltage?
I will measure the voltage between two points on my circuit. Which will be 3 phase points R and Y
That doesn't tell me much. Please draw a block diagram of the circuit and show where those points are located. IS your three-phase a "delta" configuration or a "Y" configuration? Makes a very big difference in what voltage you will see.
Have you already measured the voltage at pints R and Y with your digital volt meter and what voltage did you measure?
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