Darn good point Aland.
Current Transformers entail a great part of my day-to-day work, with High Current loads, spread over 400V phases.
I have had to cut live Busbars with an Insulated Hacksaw, certified to VDE standards,to a voltage of 1200V.
Keep the hacksaw moving, or it will weld!
Measuring currents on 11kV and 22kV Bushing type CT's give me the willies!.
CT's need thier own sort of Safety treatment!. [Linked Image]