Wednesday, September 23, 2009

Distribution of electricity

Distribution of electrical power - Distribution starts from substation. Transmitted power stepped down here. This power further transmitted to the loads. One more transmitted located near to the loads which always step down transformer. The voltage level is further reduced and supplied to the domestic loads.
The voltage which reaches the domestic load will be 240 V. This distribution may takes place in two types. 1. Underground lines 2. Overhead lines. In crowded area, underground transmission is preferred. AC type is used in this entire distribution process.
Transmission of electric power can be in two ways. 1. AC power transmission 2. DC power transmission. In DC method, converters and inverters can be used. DC method preferred only if the transmission distance more than 1500 km. In case of industry loads, the distribution power level is higher than the domestic level.

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