(A - E) (F - J) (K - O) (P - T) (U - Z)

  • Sales for Resale : Energy supplied to other utilities and agencies for resale.
  • Savings Fraction : The percentage of consumption from using the old technology that can be saved by replacing it with the new, more efficient demand-side management technology. For example, if a 60-watt incandescent lamp were replaced with a 15-watt compact fluorescent lamp, the savings fraction would be 75 percent because the compact fluorescent lamp uses only 25 percent of the energy used by the incandescent lamp.
  • Scheduled Outage : An outage that results when a component is deliberately taken out of service at a selected time, usually for the purposes of construction, maintenance, or testing.
  • Securitization : The act of pledging assets to a creditor through a note, lien or bond. This is a mechanism to allow a utility to recover stranded costs up front in a single lump sum payment. Under a securitization scheme, the legislature or utility commission orders customers to pay a surcharge as part of their electric bill. That surcharge must be paid within the utility's original service territory, regardless of who supplies the electricity to customers.
  • Self-Generation : A generation facility dedicated to serving a particular retail customer, usually located on the customer's premises. The facility may either be owned directly by the retail customer or owned by a third party with a contractual arrangement to provide electricity to meet some or all of the customer's load.
  • Service Agreement : an agreement entered into by the transmission customer and transmission provider.
  • Service Area : The territory a utility system is required or has the right to supply electric service to ultimate customers.
  • Service Drop : The lines running to a customer's house. Usually a service drop is made up of two 120 volt lines and a neutral line, from which the customer can obtain either 120 or 240 volts of power. When these lines are insulated and twisted together, the installation is called triplex cable.
  • Service Life : The length of time a piece of equipment can be expected to perform at its full capacity.
  • Service Territory : This is the state, area or region served exclusively by a single electric utility.
  • Single Phase Line : This carriers electrical loads capable of serving the needs of residential customers, small commercial customers, and streetlights. It carrier a relatively light load as compared to heavy duty three phrase constructs.
  • Small Power Producer : Refers to a producer that generates at least 75% of its energy from renewable sources.
  • Solar Thermal Electric : A process that generates electricity by converting incoming solar radiation to thermal energy.
  • Source Energy : All the energy used in delivering energy to a site, including power generation and transmission and distribution losses, to perform a specific function, such as space conditioning, lighting, or water heating. Approximately three watts (or 10.239 Btus) of energy is consumed to deliver one watt of usable electricity.
  • Southeastern Electric Reliability Council (SERC : One of the ten regional reliability councils that make up the North American Electric Reliability Council (NERC).
  • Southwest Power Pool (SPP) : One of the ten regional reliability councils that make up the North American Electric Reliability Council (NERC).
  • Spinning Reserve : Reserve generating capacity running at zero load.
  • Split-the-savings : The basis for settling economy-energy transactions between utilities. The added cost of the supplier are subtracted from the avoided costs of the buyer, and the difference is evenly divided.
  • Spot Purchases : Single shipment of fuel purchased for delivery within 1 year.
  • Stable Prices : Prices that do not vary greatly over short time periods.
  • Standard Rate : The basic rate customers would take service under if they were not on real-time pricing.
  • Standby Facility : A facility that supports a system and generally running under no load.
  • Stocks : A supply of fuel accumulated for future use.
  • Stranded Benefits : Special collection programs, renewable energy and demand side management programs, lifeline rates and other utility resources funded by a monopoly utility that may not be funded if the utility's competition does not have smaller costs.
  • Stranded Commitment : Assets and contracts associated with shifting to competition which are above market prices and result in non-competitive conditions for the utility.
  • Stranded Investments/Costs : Utility investments in facilities built to serve customers under traditional regulation may become unrecoverable or "stranded" if those assets are deregulated and their cost of generation exceeds the actual price of power in a competitive market. These include prior investments allowed by regulators that are currently being recovered through regulated rates.
  • Stranded/Strandable Costs : These are costs inherent in the existing electric utility industry rendered potentially unrecoverable in a competitive market.
  • Strategic Conservation : Strategic conservation results from load reductions occurring in all or nearly all time periods. This strategy can be induced by price of electricity, energy-efficient equipment, or decreasing usage of equipment.
  • Strategic Load Growth : A form of load building designed to increase efficiency in a power system. This load shape objective can be induced by the price of electricity and by the switching of fuel technologies (from gas to electric).
  • Substation : A facility used for switching and/or changing or regulating the voltage of electricity. Service equipment, line transformer installations, or minor distribution or transmission equipment are not classified as substations.
  • Summer Peak : The greatest load on an electric system during any prescribed demand interval in the summer.
  • Supplier : A person or corporation, generator, broker, marketer, aggregator or any other entity, that sells electricity to customers, using the transmission or distribution facilities of an electric distribution company.
  • Supply-Side : Technologies that pertain to the generation of electricity.
  • Surplus : Excess firm energy available from a utility or region for which there is no market at the established rates.
  • Switching Station : Facility used to connect two or more electric circuits through switches.
  • System (Electric) : Physically connected generation, transmission, and distribution facilities operating as a single unit.
  • System Peak Demand : The highest demand value that has occurred during a specified period for the utility system.
  • Systems Benefits Charge : This is a per-customer charge intended to recover the costs of utility demand-side management reach and development, renewable resources or low-income programs.

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