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2. Power factor - Wikipedia

   en.wikipedia.org/wiki/Power_factor

   Power flow calculated from AC voltage and current entering a load having a zero power factor (ϕ = 90°, cos(ϕ) = 0).The blue line shows the instantaneous power entering the load: all of the energy received during the first (or third) quarter cycle is returned to the grid during the second (or fourth) quarter cycle, resulting in an average power flow (light blue line) of zero.

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] It is a type of polyphase system employing three wires (or ...

4. Megger Group Limited - Wikipedia

   en.wikipedia.org/wiki/Megger_Group_Limited

   Revenue. €250 m [1] Number of employees. 1350 [1] Website. www.Megger.com. Megger site in Dover, England, UK. Megger Group Limited (also known as Megger) is a British manufacturing company that manufactures electronic test equipment and measuring instruments for electrical power applications. Megger is known for its electrical insulation testers.

5. Induction motor - Wikipedia

   en.wikipedia.org/wiki/Induction_motor

   For example; a single-phase motor with 3 north and 3 south poles, having 6 poles per phase, is a 6-pole motor. A three-phase motor with 18 north and 18 south poles, having 6 poles per phase, is also a 6-pole motor. This industry standard method of counting poles results in the same synchronous speed for a given frequency regardless of polarity.

6. Mathematics of three-phase electric power - Wikipedia

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

   Mathematics of three-phase electric power. One voltage cycle of a three-phase system, labeled 0 to 360° (2π radians) along the time axis. The plotted line represents the variation of instantaneous voltage (or current) with respect to time. This cycle repeats with a frequency that depends on the power system.

7. Polyphase system - Wikipedia

   en.wikipedia.org/wiki/Polyphase_system

   One voltage cycle of a three-phase system. A polyphase system (the term coined by Silvanus Thompson) is a means of distributing alternating-current (AC) electrical power that utilizes more than one AC phase, which refers to the phase offset value (in degrees) between AC in multiple conducting wires; phases may also refer to the corresponding terminals and conductors, as in color codes.

8. Petroleum industry in Ohio - Wikipedia

   en.wikipedia.org/wiki/Petroleum_industry_in_Ohio

   Oil and gas field distribution in Ohio, 1923. The petroleum industry in Ohio dates from 1859. Ohio continues to produce significant quantities of oil and gas, having produced more than 1 billion barrels of oil and 9 trillion cubic feet of natural gas since 1860. [1] Unconventional resources, primarily in eastern Ohio, are likely to increase ...

9. Transformer types - Wikipedia

   en.wikipedia.org/wiki/Transformer_types

   There are three primary types of voltage transformers (VT): electromagnetic, capacitor, and optical. The electromagnetic voltage transformer is a wire-wound transformer. The capacitor voltage transformer uses a capacitance potential divider and is used at higher voltages due to a lower cost than an electromagnetic VT.