I have not enough experience with energy meters.
Usually I work with MCU and DSP.
End user have to have measure active, reactive power and four quadrant metering.
He gave me link for MAXQ3180 and told that it can measure four quadrant power.
I can not found enough information about this measuring.
Does ADE77xx can measure it?
Maybe I can calculate it from other values(active power, reactive power, phase etc.)
Can I use single ADE77xx circuit to measure 3 phase and 1 phase power?
When only 1 phase is connected to 3 phase circuit.