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voltage sensing circuit

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power--man

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hi guys

i need some advice, how do i go about sensing the amount of voltage supplied to a load from mains (230V 50hz)

Between mains and the load i want to design a circuit that senses the amount of voltage supplied to the load.
 

For connection to the mains, you could use a small step down transformer.
A full wave rectifier and filter after that would give you a DC-like voltage proportional to peak mains voltage.

There no shortage of ways to do this task.
 

I do not know how complex you are intending to develop your project but Analog Devices offers a very powerful IC that senses all the parameters regarding energy, current and voltage. I implemented it in my thesis. Take a look, ADE7754 or ADE7758.

regards
 

thanks for the reply ionp.

Im goin to be connecting the live n nuetral wire of mains to a appliance and then connecting the transformer parallel to that to sense the voltage? then do as u suggested above
 

Hi,

you can connect the load like you say and in parallel you can connect two resistors in serie, 10K and 1 K and then monitor the voltage measuring the 1K resistor. Or you can change the values of the resistors for another level of voltage in one of them and after that you can apply a bridge of diodes for generating DC.

I hope it helps.
Alberto



power--man said:
thanks for the reply ionp.

Im goin to be connecting the live n nuetral wire of mains to a appliance and then connecting the transformer parallel to that to sense the voltage? then do as u suggested above
Click to expand...
 

You may consider these voltage transducers that can safety measure any two voltage potential in the circuit. These voltage transducers have 0 to 5V full scaled output for voltage measurement range of +/-1000V, +/-500V, and +/-50V with 3KV galvanic isolation. The large signal bandwidth of devices is typically higher than 20KHz which is more than good enough to measure 50Hz.

https://www.tifomy.com/high-voltage-transducers.html
 

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