Definitions for "Substations"
Keywords:  sdg, breakers, voltage, leak, volts
These sites contain specialized equipment to reduce or step-down transmission line voltage. Typically, the voltage is stepped down from 230,000 to 12,000 volts and is connected to a system of wires called the distribution system described below. Substations also contain large circuit breakers to stop the flow of electricity to transmission and distribution lines should the system develop a short-circuit (an electrical leak). SDG&E currently has more than 200 substations.
An electrical station where the high voltage electrical current from the transmission grid is reduced so that it is suitable for supply to customers.