Where’s the return path on the image at 21:15. The previous images the return is assumed to the concentric neutral. This looks like an open system. Can a ground grid be measured this way? It seems so from your images. If the concentric neutral is used as the return?
Seems like the area is predicated on the fault being inductive. What if the fault is on a capacitor bank, won't the fault direction seem to be the opposite direction?
sir , unbalance current protection in capacitor bank referred to the current as a result of unbalance in the capacitance bridge network in the capacitor bank.
