Adaptors for 3-Phase Direct Reference

[overeasy]

@Thierry

What about the further stock expected 26th Oct 2018, still need removing the burden resistors to monitor the 2 other phases ?

Yes

@Thierry

If yes, in the event I buy two more IoTaWatt (one for each phase) do you think it will possible to pick up the data from each IoTaWatt and synchronize those data into one IoTaWatt database or in a outside database (Synology NAS…) ?

You can send the data to Emoncms or influxDB. The timestamped data that is uploaded should synchronize properly to within one second.

@Thierry

Is there a big difference between my old unit and the coming new units, in terms of measurement precision ?

No.

[wwk]

Will the derived-reference method work if I see different voltages on phases?
example: 233.8, 237.6, 240.0

[overeasy]

It will work, but just quite as accurate as direct reference. Note that your voltages are all within 2%. Understand that one of the phases will always be direct, so same same. The other two derived will vary by some percentage.

The overwhelming majority of IoTaWatt users with three-phase use derived reference. There seems to be general satisfaction with the result.

[Bogi]

Same here! Do you still have the files? Once i order original device i’ll do one more from scratch. It would be very nice to see your approach. Thanks! bogus105@wp.pl

[overeasy]

This is a very old thread. The current V5 IoTaWatt has supported three VTs for several years now. There is no need to use any type of external adapter for direct reference.