The Electrical Distribution system further be divided into following.
Feeders, Distributors and Service Mains.
1.Feeders.
Feeders are the conductors which connect the stations (in some cases generating stations) to the areas to be fed by those stations.
Generally from feeders no tapping is taken to the consumers therefore current loading of a feeder remains the same along its length.
It is designed mainly from the point of view of its current carrying capacity
2.Distributors.
Distributors are the conductors from which numerous tapping’s for the supply to the consumers are taken.
The current loading of a distributor varies along its length. Distributors are designed from the point of view of the voltage drop in them.
3.Service Mains.
Service mains are the conductors which connect the consumer's terminals to the distributor.
Distributor is subject to the legal requirement that the voltage at the consumers terminals should be maintained within +/- 6% of the declared (or rated) voltage.
However, there is no such legal restriction on a transmission line and the voltage can vary as much as 10% or even 15% due to variations in loads.
Reference from.
Transmission and distribution of electrical power by- J.B.Gupta
