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  2. Jackson Hydroelectric Project - Wikipedia

    en.wikipedia.org/wiki/Jackson_Hydroelectric_Project

    Beginning operations in 1984, the project aims to bring clean and renewable hydropower to Snohomish county. The facility consists of a single powerhouse, two main generating units, a switch-yard, and transmission lines—all of which are directly connected to the county's local 115 kV power-transmission network. [2]

  3. Three-phase electric power - Wikipedia

    en.wikipedia.org/wiki/Three-phase_electric_power

    Three-phase transformer with four-wire output for 208Y/120 volt service: one wire for neutral, others for A, B and C phases. Three-phase electric power (abbreviated 3ϕ [1]) is a common type of alternating current (AC) used in electricity generation, transmission, and distribution. [2]

  4. List of power stations in Washington - Wikipedia

    en.wikipedia.org/wiki/List_of_power_stations_in...

    In 2020, Washington had a total summer capacity of 30,669 MW through all of its power plants, and a net generation of 116,114 GWh. [2] The electrical energy generation mix in 2022 was 67.6% hydroelectric, 12.5% natural gas, 8.4% nuclear, 6.9% wind, 3.1% coal, and 1.1% biomass which includes most refuse-derived fuel .

  5. Mathematics of three-phase electric power - Wikipedia

    en.wikipedia.org/wiki/Mathematics_of_three-phase...

    For example, balanced two-phase power can be obtained from a three-phase network by using two specially constructed transformers, with taps at 50% and 86.6% of the primary voltage. This Scott T connection produces a true two-phase system with 90° time difference between the phases.

  6. History of electric power transmission - Wikipedia

    en.wikipedia.org/wiki/History_of_electric_power...

    [7] [28] The new ZBD transformers were 3.4 times more efficient than the open-core bipolar devices of Gaulard and Gibbs. [29] In the closed-core transformer the iron core is a closed ring around which the two coils are wound. In the shell type transformer, the windings are passed through the core.

  7. Delta-wye transformer - Wikipedia

    en.wikipedia.org/wiki/Delta-wye_transformer

    A delta-wye transformer is a type of three-phase electric power transformer design that employs delta-connected windings on its primary and wye/star connected windings on its secondary. A neutral wire can be provided on wye output side. It can be a single three-phase transformer, or built from three independent single-phase units.

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