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In 3 -╬ж synchronous motor if one of the phases is short-circuited the motor will
Run as before
Overheated and eventually burn
Not start
Burn
Overheated and eventually burn
In a 3-phase synchronous motor, if one phase is short-circuited, the motor will overheat due to an imbalance in the current and magnetic flux, potentially leading to the insulation failure and eventual burning of the motor.
In a 3-phase synchronous motor, if one phase is short-circuited, the motor will overheat due to an imbalance in the current and magnetic flux, potentially leading to the insulation failure and eventual burning of the motor.
I=ZVтАЛтЗТIcircuitedтАЛ>InormalтАЛ тАФ Current in the remaining phases increases.
P=3тАЛ├ЧV├ЧI├Чcos╧Х тАФ Power delivered is impacted by imbalance.
Synchronous motors operate on the principle of rotating magnetic fields generated by three-phase currents. When one phase is short-circuited, the motor loses balance, increasing the current in the remaining phases, which can cause excessive heating and damage to the windings.
Synchronous motors require balanced 3-phase supply for stable operation.
Imbalance caused by a short circuit leads to excessive current and heating.
Efficient power factor correction
Stable speed under varying loads
Sensitivity to phase imbalance
Complex starting mechanism
Industrial drives
High torque applications
Standard operating procedure should include protection against phase loss.
Option A is incorrect as it implies no effect; Option C suggests it will not start, which is not accurate; Option D only indicates burning without mentioning overheating.
B is correct тАФ Overheating due to short-circuit leads to insulation failure.
Always ensure protective measures in motor circuits to safeguard against phase failures.