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Answer Posted / sunil bhat abb
Floating Neutral is a condition when neutral is not
grounded the case may be when single phase Cable say 66 KV
having lead sheath is not grounded at either side as a
consequence the Neutal end point (sheath ) develops some
potentail say 50 Volts under normal condition and in case
of fault due to transformer effct between sheath and
conductor the voltage of unearthed(floating end) end gets
abnormally high so a Lighting arrestor /surge arrestor is
used at floating end
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