Final answer:
Subtransmission substations generate electricity in the range of 5 kV to 30 kV, which is then stepped down for local use near population or industrial centers.
Step-by-step explanation:
Subtransmission substations generate at a range of 5 kV to 30 kV and are located close to population or industrial centers. During the power distribution process, electric power is generally generated at greater than 10 kV and transmitted over long distances at high voltages, which can range from 120 kV to 700 kV, to minimize energy losses. When the power reaches the vicinity of the users, such as neighborhoods or industrial areas, it is stepped down at a substation to voltages suitable for local distribution, which typically falls between 5 kV and 30 kV. Eventually, for safe usage at individual sites, this voltage is further reduced to 120, 240, or 480 V.