Understanding the Concept of Earthing In Electric Power System

Note: This is a paper published in the IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE), Volume 11, Issue 3 Ver. III (May. – Jun. 2016), pp. 29-33

Earthing is the concept of connecting a thing to the earth (or ground). In Power systems engineering, earthing is the one concept that cannot be dispensed with. Generators, reactors and transformers have to be earthed at their star or neutral point for
1. Proper operation and application of earth-fault relays;
2. The realization of single phase voltage supply (in the case of transformers); and
3. The drainage (as much as possible) of the harmonic voltages that cause distortions in system voltages.

Furthermore, the metallic enclosure and non-conduction parts of every apparatus requires earthing for the protection of personnel and users from electrical hazards. It is inestimable the quantity and value of lives and properly that would have been lost to electrical faults but for the application of this concept. Thus, in this paper a detailed discussion of system and equipment ear thing is presented. The author recommends the use of chem.-rods for better earthing, as well as an appropriate routine earth-point maintenances schedule.

The author have discussed:
1. Objective of Earthing
2. Methods of Earthing
3. Selection of Earthing Materials, etc

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