I am in the process of designing my own board that connects directly to Danish 3-phase 230v and if space permits be mounted in a DIN rail housing so it can be installed in my breaker box.
The plan is to use use three of the smallest 9V PCB mount transformers i can find, like [PE2006-M] (http://en.yhdc.com/product/PE2006-M-577.html) and a Hi-Link hlk-pm03 to power the electronics.
I will remove CT channel 13+14 obviously. But will it be better to use the ACBIAS signal used for 1-phase VT instead of the BIAS signal currently used for channel 13+14?
The op-amp is just configured for voltage following, so the BIAS and ACBIAS are the same voltage.
Can IoTaWatt measure 400V loads (Voltage between two phases) or is it limited to single phase loads?
I do not have any 400V appliances yet, so not really a problem but nice to know.
Thank you for this amazing project!