Distribution system

Main characteristics of a distribution system

 Feeder: It’s a conductor which connects the sub-station to the are where power is to be distributed.

Distributors: It’s a conductor from which toppings are taken from supply to the consumer.

Service main: It’s a generally a small cable which connects the distributor to the consumer’s terminal.

Connection types of Distribution System

Radial Feeders

 Radial electrical power distribution system has one major drawback that in case of any feeder failure, the associated consumers would not get any power as there was no alternative path to feed the transformer. In case of transformer failure also the power supply is interrupted in other words the consumer in the radial electrical distribution system would be in darkness until the feeder or transformer was rectified.

Parallel Feeders

Parallel conductors are often installed where large ampacity feeders or services are used. Total understanding of the paralleling requirements permitted in the National Electrical Code is necessary before attempting to design a large electrical system or install these conductors.

Ring Main Distribution system

The drawback of the radial electrical power distribution system can be overcome by introducing a ring main electrical power distribution system. Here one Ring network of distributors is fed by more than one feeder. In this case, if one feeder is under fault or maintenance, the ring distributor is still energized by others feeders connected to it. In this way, the supply to the consumers is not affected even when any feeder becomes out of service. In addition to that, the ring main system is also provided with different section isolates at different suitable points. If any fault occurs on any section of the ring this section can easily.