TRANSMISSION LINE

FEEDER

It’s a conductor which connect the substation or generating station to the area where power is distributed.no tapping are taken from a feeder so that current in it remains the same.

DISTRIBUTOR

It’s a conductor from which tapping is taking for supply to the consumer the current through a distributor it’s not constant.be Couse tapping are taken at various places along with length.

SERVICE MAIN

It's generally a small cable which connects the distributed to a consumer terminal

Overhead Vs. underground

1) Public safety                           → underground system is safer then overhead system

2) Initial cost                                → underground system is more expensive

3) Flexibility                                   → overhead system much more flexible

4) Fault                                            →         underground system is very rear.

5) Appearance                                → underground system is good then the overhead system

6) Maintained cost                          → underground system is very low

7) Fault location and repair           → different to locate and repair on underground system

8) Useful life                                     → underground system much longer then overhead line