A central station is supplying energy to a community through two substations. Each substation feeds four feeders. The maximum daily recorded demands are : POWER STATION. 12,000 KW Substation A. 6000 kW Sub-station B . 9000 kW Feeder 1 1700 kW Feeder 1 2820 kW Feeder 2 1800 kW Feeder 2 1500 kW Feeder 3 2800 kW Feeder 3 4000 kW Feeder 4 600 kW Feeder 4 2900 kW Calculate the diversity factor between (i) substations (ii) feeders on substation A and (iii) feeders on sub-

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Distribution System

The final stage in the delivery of the electric power is the electric power distribution system. From the transmission system to the individual customers it carries electricity. The distribution system is connected with the transmission system and is used to lower the voltage of the transmission to medium voltage in the range of 2 kV to 35 kV with the help of transformers. This medium voltage to the distribution transformers located near the customer's premises is carried by the primary distribution system lines. These distribution transformers in turn lower the voltage to utilization voltage used in lightings, household appliances, industrial equipments etc. Through secondary distribution lines often several customers are supplied from one transformer. It is through service drops, the commercial and residential customers are connected to the secondary distribution system lines. Customers who demand a larger amount of power can be connected directly to the primary distribution system level or the sub-transmission level.