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Core - Electrical Engineering

    Chapter 8

    Three-Phase Circuits

    8.1 : Three-Phase Circuits01:22

    8.1 : Three-Phase Circuits

    In general, AC power distribution systems are classified as single-phase, two-phase, or three-phase. Single-phase circuits involve a single source ...

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    8.2 : Generation of Three-Phase Voltage01:21

    8.2 : Generation of Three-Phase Voltage

    A three-phase AC generator with a rotating magnet surrounded by stationary windings is used to generate three-phase voltages. The stator houses three ...

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    8.3 : Three-Phase Voltages01:30

    8.3 : Three-Phase Voltages

    In three-phase four-wire systems, three Y-connected voltage sources generate balanced phase voltages. There are two phase sequences based on the order in ...

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    8.4 : The Y-to-Y Circuit01:19

    8.4 : The Y-to-Y Circuit

    Balanced four-wire Y-to-Y systems consist of three balanced Y-connected sinusoidal voltage sources and loads with the neutral wire connecting both the ...

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    8.5 : The Y-to-Delta Circuit01:19

    8.5 : The Y-to-Delta Circuit

    In electrical power grids, balanced Y-to-Delta circuits feature Y-connected voltage sources and delta-connected loads, typically without a neutral line. ...

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    8.6 : The Delta-to-Delta Circuit01:17

    8.6 : The Delta-to-Delta Circuit

    A balanced delta-to-delta system has a delta-connected source and load. The delta-connected sources are assumed to be in positive sequence to express the ...

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    8.7 : The Delta-to-Y Circuit01:16

    8.7 : The Delta-to-Y Circuit

    A balanced delta-to-Y system features a balanced delta-connected source powering a balanced Y-connected load. In this delta-Y circuit, a positive abc ...

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    8.8 : Power in a Three-Phase Circuit01:15

    8.8 : Power in a Three-Phase Circuit

    A manufacturing plant with several heavy machines requires significant power supplied by a balanced three-phase system. To determine the instantaneous ...

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    8.9 : Power Distribution in Three-phase and Single Phase Circuits01:17

    8.9 : Power Distribution in Three-phase and Single Phase Circuits

    Consider a two-wire single-phase system providing electricity to homes and a three-wire balanced three-phase system powering a factory with heavy ...

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    8.10 : Line Loss01:10

    8.10 : Line Loss

    Consider a balanced three-wire Y-to-Y circuit represented in the time domain, which can be transformed into a per-phase equivalent circuit. First, the ...

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    8.11 : Reducing Line Loss01:18

    8.11 : Reducing Line Loss

    To minimize line losses in three-phase circuits, two transformers are added: a step-up transformer at the source and a step-down transformer at the load. ...

    144 views
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