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Re: How to communicate with ADE7754 to make an energy meter with PIC18F2520

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Hi MARS

 

Yes. Please ground neutral directly and connect a RC filter to VN. Refer to my earlier diagram in this thread. There should be a ground symbol on the neutral wire.

 

Regarding the burden resistor value, if 10Arms in the max current in your application, kindly choose 22 ohm differential burden resistors, instead of 56 ohm.

 

So, (10/2500)*(22+22) would become 0.176Vrms. This is nearly Full-scale/2 for the IC, which is a good place to set your maximum current level.

 

Regards

hmani


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