(IEEMA Journal, June 2006, pp. 51–58).
In part 1, basic concepts of grounding were introduced. The essential features of underground system were elaborated. In this article we will graduate to grounded systems. The definition of effective grounding is given. The features of Resistance grounding and Reactance grounding will be covered. The operation of zig-zag connection will be demystified. Star-delta and open delta connections to ground the ungrounded system are explained. The relative advantages of each type of grounding are examined. The over voltage problems in non-solidly grounded systems are discussed. Finally peculiar ground fault current distributions under some system conditions are illustrated.
Grounding of electrical system, Grounding method, Solidly grounded system, Light preventing grounding system
