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2. 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]

3. Wireless powerline sensor - Wikipedia

   en.wikipedia.org/wiki/Wireless_powerline_sensor

   The photo also shows an unrelated distribution transformer, which reduces 4160 V to 240/120 V. Closeup of overhead powerline sensor hanging from one phase of a 4160 volt powerline In the photos on the right, an antenna on the sensor transmits data to a communication device attached to a nearby utility pole.

4. Fluke Corporation - Wikipedia

   en.wikipedia.org/wiki/Fluke_Corporation

   Fluke Corporation is an American manufacturer of industrial test, measurement, and diagnostic equipment, including electronic test equipment. It was started in 1948 by John Fluke while he was employed at General Electric .

5. Phase converter - Wikipedia

   en.wikipedia.org/wiki/Phase_converter

   An American Rotary Phase Converter with a Transformer. A phase converter is a device that converts electric power provided as single phase to multiple phase or vice versa. The majority of phase converters are used to produce three-phase electric power from a single-phase source, thus allowing the operation of three-phase equipment at a site that only has single-phase electrical service.

6. High-leg delta - Wikipedia

   en.wikipedia.org/wiki/High-leg_delta

   High-leg delta (also known as wild-leg, stinger leg, bastard leg, high-leg, orange-leg, red-leg, dog-leg delta) is a type of electrical service connection for three-phase electric power installations. It is used when both single and three-phase power is desired to be supplied from a three phase transformer (or transformer bank).

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.