My friend tested the operation of Multilin ground fault protection on a 12Kv line with ratchet cable cutters. It shut down the equipment and didn't damage the cutters - or my friend. Maybe a lot of things had to line up for that to happen. The cable had ground fault protection, the handles of the cutter were non-conductive and the cutters maintained contact with the shield as they slowly moved through the insulation toward the conductor. Or, maybe it was just luck.