electricalscho

High Voltage System

An electric power system having a maximum roo-mean-square ac voltage above 72.5 kilovolts (kv).

Hertz

1) A unit of frequency equal to one cycle per second. 2) In alternating current, the changing of the negative and positive poles.

Henry

The meter-kilogram-second unit of inductance, equal to the inductance of a circuit in which an electromotive force of one volt is produced by a current in the circuit which varies at the rate of one ampere per second.