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for balanced system nata ground Vo Sa Te in load Current flown balanced System Symmetrical (which means having me magnitude and 120 phase Shift]. In that Case Curants Surnmation is zeno (Jati, I.:0) without oues loading any phase. no current flown in nuetral ground wire boss will be Symmetrical load in av phases and no current flown in ground wire e since for balans loads Sequency Current to and CUTTO flown in in ground wire is zero sequence currents only.] Jat Io +1:31. less ZLO but here lat I, + 1 = 0 ..10 for balanced lood and no need of neutral wire br) ground
loads unbalance Summation of all current Font not equal to Zero 12 ++1 : 37 and here Jo have Some magnitude .
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Iof neutral Current wire not will flow Connected these extra through all phages () wire connected. If ground wire if not connected ground ground wire cor) neodral wire Some more Curren flow through any phase this may lead to more loss for Small unbalance. If any flash over OCCUTS lines this may lead to damage of loads. So neutral to ground wire require neutral current to 1) send back unbalanced Source through neutral line To suppress Over arrents (unbalanced in 3) ground resistance TO protect Loads acciedents from flash over (or any power loss by malcing finally to reduce the System balance
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