ADVERSE EFFECTS OF SINGLE PHASING
||The line current increases by 1.5
||If the relay setting is at 15-20%
higher than actual operating current then the
relay will take 4-6 minutes to trip.
|The motor (particularly smaller capacity
motors upto 7.5 H.P.) cannot withstand this high
current for such a long time and in most of the
cases it burns out before the relay trips.
||Heavy short circuit current flows
through the relays, contactors, cables etc.
condition when the relay, contactor trips, they
produce sparks and some times bursts..
||This further damages the switchgear
and in some of the cases may cause fire also.