- San Onofre Nuclear Generating Station (SONGS)
The plant, located in San Clemente, Calif., is jointly owned by SCE, San Diego Gas & Electric, and the city of Riverside, and generates approximately 2,200 megawatts of power, enough to serve 1.5 million average Southern California homes at a point in time. San Onofre’s two operating reactors have produced 350 billion kilowatt-hours of electricity to date. Between refueling outages, San Onofre’s reactors have been available to help meet Southern California’s energy needs approximately 97 percent of the time. Learn more about SONGS.
- Secondaries
- Output side of transformer. Low-voltage lines, 120/240 volt for residential, 120/240, 120/208, 244/480, and 277/408 volt for commercial, that carry power from the transformer to the poles nearby.
- Secondary Circuit
- The wiring connected to the secondary terminals of a transformer.
- Self-contained Metering
- Indicates that all the current that is used by the customer will pass through the meter.
- Service Entrance
- The point where the service wires enter a building.
- Service Limiter
- Limits electricity use to 120 volts and 5 or 10 amps = approx. 600-1,200 volts.
- Service Lines
- Also known as DROPS. Lines that carry power from secondary lines at pole to each individual customer.
- Service Wires
- Also known as DROPS. Lines that carry power from secondary lines at a pole to each individual customer.
- Shock
- The sensory impression caused by an electrical current flow through the body.
- Short
- An accidental connection of low resistance, such as in an electrical cord with wires exposed contacting each other.
- Single-Phase Motor
- An alternating current motor designed to operate from a single- phase circuit.
- Sleeves
- Also known as boots. Plastic devices which cover the meter prongs preventing the flow of electricity. Used to turn off socket-type meters.
- Solar Energy
- The term "solar energy" refers to the conversion of sunlight into heat or electricity. See renewable energy.
- Solid Waste Energy
- The term "solid waste energy" refers to organic material that can be burned directly or chemically converted to produce heat. In turn, this heat can be used to produce electricity.
- Splice
- The joining of the ends of two wires or cables together.
- Squirrel Cage
- A steel bracket mounted on a pole to support line conductors.
- Stage 3 Emergency
- If power reserves ever fall below 1.5 percent, Cal-ISO will declare a Stage 3 emergency and the state's investor-owned utilities, including SCE, may be ordered to immediately reduce the demand for electricity. At that point, the utilities will implement a series of temporary, controlled rotating power outages.
- Star System
- A method of connecting three single transformers for three phase application.
- Starting Current
- The current taken by a motor when starting.
- Step Down
- To reduce the voltage of a circuit, from a higher to a lower value, by means of a transformer.
- Step Up
- To increase the voltage of a circuit, from a lower to a higher value, by means of a transformer.
- Stranded Costs
- (See "Competition Transition Charge")
- Substation
A subsidiary station of an electricity generation, transmission and distribution system where voltage is transformed from high to low or the reverse using transformers. Electric power may flow through several substations between generating plant and consumer, and may be changed in voltage in several steps.
- Sustained Outage
- An electrical outage that lasts longer than two minutes.
- Switch
- A device for closing, opening, or changing the connections of a circuit.
- Switchboard
- A panel or supports upon which are placed the switches, controls, and meters for the control of electrical machines and systems.
- Switching Center
- A staffed substation, where all switching operations are communicated and logged, and the status of all electrical circuits are monitored.
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