Interesting, thanks.The CT I have are a coil plus a resistor, put out 3 mV per amp.
Two in series would add voltage, if each was around a wire carrying one amp, the series connection would produce 6 mV.
If in parallel, 3 mV || 3 mV = 3 mV
If one wire carried 0A and the other 1A, the sensed current would split between the two parallel resistors (when CT in parallel) so 1.5V
Each is just a current source driving a resistor.
Sum vs. average, I figure.
The CT sensor I have is shown in the last picture here: https://www.amazon.com/gp/aw/d/B08H...dcrb_top?ie=UTF8#immersive-view_1632278868428
Doing a bit of digging, it seems there are two types of CT sensors, current type and voltage type (with a resistor, like yours).
I’m not sure how to determine which type I have.
With current type, two in-phase sensors in parallel should deliver a combined current equal to their sum.
With voltage type, the input current adds but is translated to voltage though 2 resistors in parallel, so half the voltage output if the sum or the average, as you state.
Since my GTILs are configured to drive current and/or voltage to zero, the behavior should be the same and it may just be the reported power when the GTIL is unable to zero it out which is off by 50% (half in the case of parallel versus series connection).
I just had a look a my CT sensor and it says ‘100A / 50mA’ so it looks like I have a current type and that is why parallel connection is adding as I had thought…