fair tiger
This most likely applies to any CT measuring device, regardless of make.
In the US, our power is fed to homes and most small business in the form of dual/split-phase from the utility transformer.
From the transformer, we're supplied three current carrying wires from the secondary tap.
The two "hot" wires are 240Vac when measured across.
It is single phase 240Vac with a third leg from the winding 180 degrees out of phase to be the neutral to provide 120Vac for some appliances.
I would like to know options that have been exercised to properly measure power with combined 240V loads and loads on each of the 120V legs.
As of now, the CT on the of the 240V reads negative as it is the return path for the 220V loads, but a supply path for 120V loads.
If I turn the CT around, the values are now showing consumption, but at combined rate significantly higher than actual.
evidently no 220V loads are being used at the time this was captured:
elfin elm
