Definition of EHT in English:

EHT

adjective

rare
  • Of or relating to a voltage much higher than a usual or standard voltage; designed to produce, carry, or operate at such a voltage; (occasionally also) designating a voltage of this kind.

noun

rare
  • A voltage of this kind; = "EHV [noun]".

Origin

Early 20th century; earliest use found in Journal of the Institute of Electrical Engineers.