Answer Posted / mehul g. c.

single phasing is the fault in that one of three phase will
break or not proper then machine or equipments will get
unbalance.

my mean to say is suppose r,y&b is three phase & y is not
showing voltage for some reason than it is single phasing.

if it is happens then machine will not work proper it will
get heated because of phase unbalancing or burnt.

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