It is part of the electrical power system which is used to distribute electrical power for utilization and is called the distribution system.
1. Feeder-
A feeder is actually a conductor connected from the substation to the area where the electrical power is utilized by the consumer. Tapping is not provided in the feeder, therefore, the current flow in the feeder has remained the same. The main consideration for designing the feeder is the current carrying capacity.
2. Distributors-
It is also a conductor where tapping is taken to supply electric power for utilization by consumers. As shown in figure AB, BC, CD, and DA are distributer. There is tapping taken in the distributors therefore current in distributors is not constant, it varied with the load. The main consideration for designing distributors is a voltage drop along their length.
3. Service Mains-
It is generally a small cable connected with a distributor to the consumer terminal.
Classification of the distribution system-
A distribution system can be classified into 3 categories-
1. Nature of current-
It also can divide into two parts.
a. DC distribution system.
b. AC distribution system.
Now a day AC distribution system is preferred over the DC distribution system because of economical, flexible properties.
2. Type of construction-
It can also be classified as;
a. Overhead system
b. Underground system
3. Scheme of connection-
According to that, the distribution system can be divided into-
a.Radial system
b.Ring the main system
c.Interconnected system