Lecture

Triangle-Star Transformation

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Description

This lecture covers the transformation of a triangle assembly into a star assembly in electrical engineering, focusing on reducing power consumption without changing voltage or phase impedances. It also discusses the adaptation to higher voltage networks and the replacement of three-phase loads to maintain power. Examples and calculations are provided to illustrate the concepts.

In MOOC

Electrical engineering II

This course deals with three-phase AC systems, the mainstay of industrial power supplies and certain types of electrical machines. The associated three-phase loads, whether symmetrical or asymmetrical, will be studied, along with the resulting active, reactive and apparent powers. Reactive power compensation methods will be developed. This course also deals with transient regimes, induced by the switching on, switching off or failure of circuits on their source, whether DC or AC. The importance of studyin

Official source

Ontological neighbourhood

Electrical engineering

Power engineering: Electric power transmission

Physics

Electromagnetism: Electrical networks

Related concepts (32)

Three-phase electric power

Three-phase electric power (abbreviated 3φ) is a common type of alternating current (AC) used in electricity generation, transmission, and distribution. It is a type of polyphase system employing three wires (or four including an optional neutral return wire) and is the most common method used by electrical grids worldwide to transfer power. Three-phase electrical power was developed in the 1880s by several people. In three-phase power, the voltage on each wire is 120 degrees phase shifted relative to each of the other wires.

Electrical engineering

Electrical engineering is an engineering discipline concerned with the study, design, and application of equipment, devices, and systems which use electricity, electronics, and electromagnetism. It emerged as an identifiable occupation in the latter half of the 19th century after the commercialization of the electric telegraph, the telephone, and electrical power generation, distribution, and use.

Two-phase electric power

Two-phase electrical power was an early 20th-century polyphase alternating current electric power distribution system. Two circuits were used, with voltage phases differing by one-quarter of a cycle, 90°. Usually circuits used four wires, two for each phase. Less frequently, three wires were used, with a common wire with a larger-diameter conductor. Some early two-phase generators had two complete rotor and field assemblies, with windings physically offset to provide two-phase power.

Electrical network

An electrical network is an interconnection of electrical components (e.g., batteries, resistors, inductors, capacitors, switches, transistors) or a model of such an interconnection, consisting of electrical elements (e.g., voltage sources, current sources, resistances, inductances, capacitances). An electrical circuit is a network consisting of a closed loop, giving a return path for the current. Thus all circuits are networks, but not all networks are circuits (although networks without a closed loop are often imprecisely referred to as "circuits").

Voltage

Voltage, also known as electric pressure, electric tension, or (electric) potential difference, is the difference in electric potential between two points. In a static electric field, it corresponds to the work needed per unit of charge to move a test charge between the two points. In the International System of Units (SI), the derived unit for voltage is named volt. The voltage between points can be caused by the build-up of electric charge (e.g., a capacitor), and from an electromotive force (e.g.

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Related concepts (32)

Three-phase electric power

Electrical engineering

Two-phase electric power

Electrical network

Voltage