3 Phase Power Monitoring

[mobile-it]

Hi all

I am looking for a schematic of 3phase power monitoring system.
- How can I make a small power supply that powers such a system and is not to expensive.
- Do I need 6 or 7 ADC's (3 for voltage, 3 for current and 1 for voltage on neutral or is this not needed?)


I know there is an application note on msp430 3 phase metering systems but I am looking for some other schematics...

thanks

 

[guti]

You can use one single channel of ADC for V and one for I and switch between them with an analog multiplexer.
for the power supply take a look here https://ww1.microchip.com/downloads/en/AppNotes/00954A.pdf

 

[mobile-it]

Do I need a special microcontroller for this purpose that can do fast multiplication or can it be made with an Arduino?
Do you have a good source for current sensors that are not to expensive?