Donut style CT (Current Transformer) coils are a type of transformer used to measure alternating current (AC) by producing a reduced current proportional to the current in its primary winding. These coils are designed in a toroidal (donut) shape which allows for a compact and efficient design.
I’d love to have a doughnut coil option for the Emporia 200A CT clamps.
In the case of a wire based main, those might fit and avoid the need for Rogowski coils.
Yes, this would require removing and reinstalling the wires.