First of all, thanks for all the nice Open Source hardware and software.
In order to discover the energy monitoring universe, I have recently bought the following components
- 1 x emonPi
- 1 x emonTx V3
- 2 x emonTH V2
- 5 x 100A max clip-on current sensor CT
- 2 x AC-AC Power Supply Adapter - AC voltage sensor (Euro plug)
- 1 x 5V DC USB Power Adapter (Euro Plug)
- 2 x RJ45 Encapsulated DS18B20 temperature sensor
Everything is working fine for RF connectivity (emonTX -> emonPi and emonTH -> emonPi), temperature monitoring (local and remote with emonTH) and single phase CT monitoring.
But I am not able to set up my 3-Phase (french) based energy monitoring with emonTx, even after having crawling the guides and forum. I am a rookie in electronics and electricity, that may be the reason
For the time being, I have
- updated the emonTx with the latest 3-Phase firmware
- plugged 3 CT into the emonTx “normal” CT inputs and put them on each phase, right after the ouput of my main electric meter.
- plugged the AC Voltage sensor on an power outlet connected on one of the 3 phase
Data is now sent by emonTx to emonPi with a “3phase” prefix (it was “emontx3” before the firmware upgrade), with those keys : powerL1, powerL2, powerL3, Vms (and others).
I didn’t proceed with any calibration, and I don’t know right now on which phase my power outlet is connected.
The problem is that I really do not know how to validate my setup, as the values provided by the emonTx seem incomprehensible to me : L1 and L2 are switching from positive to negative values, and L3 is always postive.
Here is the graph of powerL1, powerL2, powerL3 and Vms for a laps of 2h30.
Can someone help me understand these values, and show me how to finalize my setup to record the whole house and and per phase energy consumption ?