Hello community,
First of all, English is not my native language, so there might be some wrong translations (specially for electric terms).
I have 3*230V delta grid (3 wires and no neutral inside the main grid).There is 230V between each phase. I would like to know the consumption of my whole house.
I already have a shelly 3EM (https://www.shelly.com/en/products/shop/shelly-3-em-1) where I wired one of the phase as neutral.
In theory, according to the “two wattmeter method”, the power measured for the two other phases should be the total power of my house.
In practice, I have a 10% difference (too low) on month basis and up to 50% difference on low power (specially the night).
So this is my first question, is there any way to make the shelly work correctly for 3*320V delta ?
I also found an interesting device that is supposed to achieve what I want: iammeter WEM3080TD (note the D): Bidirectional Energy Monitoring System Din Rail Delta System Modbus Tcp/rtu Three Phase Wifi Energy Meter 150a,Wem3080td - Buy Energy Monitoring System,Wifi Electricity Meter,Solar System Monitors Product on Alibaba.com. As far as I know, this is the same device as WEM3080T but for 3*320V delta.
Does anybody know iammeter ? And moreover, does anybody have a WEM3080TD (and does it work ) ?
Last question, do you have any other device recommendation working for 3*320V delta ?
Thanks for your help,
Thomas