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It is true that the protection engineer must deal with

  • kA to mA
  • kV to kAmV
  • mv s to kVμs
  • ms MHz to ksHz
  • Hz Mbit to MHzbit
  • bitMbit/s to Mbitbit/s
  • cm to 10010's of km to cm

.. all a range of at least one:one millionmillion-to-one ranges, which therefore sometimes is seen as the work of a few select "secret society" people - you are either in or out making it look like a "black art".