Electrical Engineering ⇒ Topic : Electric supply system
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Samual
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ELECTRIC SUPPLY SYSTEM The transmission of electric power from a power station to consumers' premises is known as an electric supply system. In Figure (a), a typical AC power supply system is shown. Generated voltage = 11 kV. This voltage is stepped up to 132 kV by a step up transformer for primary distribution to reduce the transmission loss. After primary transmission, this voltage (132 kV) is stepped down by a step down transformer for secondary transmission. This is further stepped down to 11 kV before substation. From substation primary distribution is carried out.Further, this is stepped down to 440 V for secondary distribution. Consumers' supply is given by three-phase, four-wire line.
Figure (a) AC supply schenne. | |
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