A distribution feeder of 1km length having resistance, but negligible reactance, is fed from both the ends by 400V, 50Hz balanced sources. Both voltage source  are in phase. The feeder supplies concentrated loads of unity power factor as shown in the figure.

The contributions of  and  in 100A current supplied at location P respectively, are

Single line diagram of a 4-bus single source distribution system is shown below. Branches and have equal impedances. The load current values indicated in the figure are in per unit.

Distribution Company’s policy requires radial system operation with minimum loss, this can be achieved by opening of the branch

A dc distribution system is shown in Figure with load currents as marked. The two ends of the feeder are fed by voltage sources such that, the value of the voltage for a minimum voltage of 220V at any point along the feeder is

A single phase AC distributor supplies two single phase loads as shown in fig. The voltage drop from A to C is:

The main criterion for selection of the size of a distribution for a radial distribution system is:

The selection of size of conductors for a distributor in a distribution system is governed by

Ring main distribution system is preferred to a radial system, because