The electrical motors can be affected by higher current (particularly smaller capacity motors upto 7.5 H.P.) in three ways:
Higher current produces higher losses and thereby premature failure of winding
Higher losses of electric motors also increase the losses of cables, switches and transformers
For smooth continuous operation of motors, over load relays are usually set at 20% higher setting
Other information:
These controlled voltage stabilizers are maintained at 390/400 volts, the motor will operate smoothly drawing 15 - 20% lesser current and correspondingly the relay setting can be reduced by 15 - 20%
In case single phasing occurs, the relay will trip in 40-50 seconds
The motor can withstand the high current
Also, the relays, contactors, switch gears incorporated with the motor will be safe
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