Thursday, September 15, 2011

Introduction to Feeder Protection

Feeder and Busbar protection (Part6)       
       The feeder is the part of the power system which is used for transmission and distribution of electric power from the power station to other points. The term feeder is generally used in broad sense which includes overhead transmission lines and under ground cables.
       The protection of transmission lines is broadly classified as,
1) Overcurrent protection.
2) Distance protection.
3) Pilot protection.
       The selection of the protection scheme depends on the following factors.
1) Economics aspects which ensures 100% continuity of supply.
2) Types of feeders whether parallel, ring main etc.
3) Availability of pilot wires.
4) Number of switching stations in series between power station and receiving end.
5) Earthing of the system whether neutral is earthed or insulated.

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