(1) in a general sense, the set of voltage levels in excess of low voltage; (2) in a restrictive sense, the set of upper voltage levels used in power systems for bulk transmission of electricity
acronym: HV
see also grids; power cable
note: IEC only distinguishes low and high voltage, respectively below and above one kilovolt. In power grids, a third medium voltage level is usually introduced, and the term high voltage reserved typically for transmission above 100 kV. High voltage transmission uses predominiantly aluminium overhead lines.
standard IEC 60050