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Electrical power and energy



Sources of mains electricity Mains electricity comes from a power station and its current is the alternating current which can either be stepped up or down by a transformer.  A.c is produced when a conductor is rotated in a magnetic field or when a magnetic field is rotated near a conductor.   This method is known as electromagnetic induction. The source of energy for rotating the turbine is the actual source of electrical energy. Most of the electricity in East Africa is generated from water.   Power Transmission This is the bulk transfer of electric power from one place to another. A power transmission system in a country is referred to as the national grid. This transmission grid is a network of power generating stations, transmission circuits and sub-stations. It is usually transmitted in three phase alternating current.   Grid input At the generating plant the power is produced at… Read More »MAINS ELECTRICITY

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