High voltage DC current measurement by inductance?
There are noncontact dc analog panel ammeters, I've seen one but I'm not sure where you get them from, they clip onto the cable and need no power, they are entirely passive and mechanical. Failing that, what's wrong with a regular analog ammeter? as long as the metal parts are well insulated from the user, there is no real voltage limit (the actual meter will only have a small voltage across its terminals even though the whole thing sits at a high voltage - just like birds on a power line). There are several manufacturers making active smd current shunts with isolation in the kV range (Avago is on that comes to mind). There are lots of 'clamp' meters that don't open (you get just the fully potted sensor), they have real good insulation (especially the LEM ones), they're pretty permanent (seeing as they get soldered to a pcb and the rings don't open)