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The driving power from the prime mover driving the alternator is lost but the alternator remainsconnected to the supply network and the field supply also remains on. The alternator will
- a)get burnt
- b)behave as an induction motor but will rotate in opposite direction
- c)behave as synchronous motor and will rotate in same direction
- d)behave as a synchronous motor but will rotate in a reverse direction to that corresponding to generator action
Correct answer is option 'C'. Can you explain this answer?
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The driving power from the prime mover driving the alternator is lost ...
Answer:
Behavior of Alternator When Driving Power is Lost
When the driving power from the prime mover driving the alternator is lost, but the alternator remains connected to the supply network, and the field supply also remains on, the alternator will behave in a particular manner.
The behavior of the alternator can be explained under the following subheadings:
Synchronous Motor
When the driving power from the prime mover is lost, the alternator will behave as a synchronous motor. It means that the alternator will continue to rotate in the same direction as it was rotating during the generator action. The direction of rotation will not be reversed.
Same Direction
The synchronously rotating alternator will rotate in the same direction as the rotating magnetic field in the stator. Therefore, the direction of rotation of the alternator will be the same as that of the rotating magnetic field in the stator.
No Burnout
The alternator will not get burnt as the field supply is still on, and the alternator is connected to the supply network. The field supply will maintain the magnetic field in the rotor, which will continue to rotate synchronously with the stator magnetic field.
Conclusion
When the driving power from the prime mover driving the alternator is lost, but the alternator remains connected to the supply network and the field supply also remains on, the alternator will behave as a synchronous motor and will rotate in the same direction as it was rotating during the generator action. The alternator will not get burnt as the field supply is still on, and the alternator is connected to the supply network.
Behavior of Alternator When Driving Power is Lost
When the driving power from the prime mover driving the alternator is lost, but the alternator remains connected to the supply network, and the field supply also remains on, the alternator will behave in a particular manner.
The behavior of the alternator can be explained under the following subheadings:
Synchronous Motor
When the driving power from the prime mover is lost, the alternator will behave as a synchronous motor. It means that the alternator will continue to rotate in the same direction as it was rotating during the generator action. The direction of rotation will not be reversed.
Same Direction
The synchronously rotating alternator will rotate in the same direction as the rotating magnetic field in the stator. Therefore, the direction of rotation of the alternator will be the same as that of the rotating magnetic field in the stator.
No Burnout
The alternator will not get burnt as the field supply is still on, and the alternator is connected to the supply network. The field supply will maintain the magnetic field in the rotor, which will continue to rotate synchronously with the stator magnetic field.
Conclusion
When the driving power from the prime mover driving the alternator is lost, but the alternator remains connected to the supply network and the field supply also remains on, the alternator will behave as a synchronous motor and will rotate in the same direction as it was rotating during the generator action. The alternator will not get burnt as the field supply is still on, and the alternator is connected to the supply network.
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The driving power from the prime mover driving the alternator is lost but the alternator remainsconnected to the supply network and the field supply also remains on. The alternator willa)get burntb)behave as an induction motor but will rotate in opposite directionc)behave as synchronous motor and will rotate in same directiond)behave as a synchronous motor but will rotate in a reverse direction to that corresponding to generator actionCorrect answer is option 'C'. Can you explain this answer?
Question Description
The driving power from the prime mover driving the alternator is lost but the alternator remainsconnected to the supply network and the field supply also remains on. The alternator willa)get burntb)behave as an induction motor but will rotate in opposite directionc)behave as synchronous motor and will rotate in same directiond)behave as a synchronous motor but will rotate in a reverse direction to that corresponding to generator actionCorrect answer is option 'C'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about The driving power from the prime mover driving the alternator is lost but the alternator remainsconnected to the supply network and the field supply also remains on. The alternator willa)get burntb)behave as an induction motor but will rotate in opposite directionc)behave as synchronous motor and will rotate in same directiond)behave as a synchronous motor but will rotate in a reverse direction to that corresponding to generator actionCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The driving power from the prime mover driving the alternator is lost but the alternator remainsconnected to the supply network and the field supply also remains on. The alternator willa)get burntb)behave as an induction motor but will rotate in opposite directionc)behave as synchronous motor and will rotate in same directiond)behave as a synchronous motor but will rotate in a reverse direction to that corresponding to generator actionCorrect answer is option 'C'. Can you explain this answer?.
The driving power from the prime mover driving the alternator is lost but the alternator remainsconnected to the supply network and the field supply also remains on. The alternator willa)get burntb)behave as an induction motor but will rotate in opposite directionc)behave as synchronous motor and will rotate in same directiond)behave as a synchronous motor but will rotate in a reverse direction to that corresponding to generator actionCorrect answer is option 'C'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about The driving power from the prime mover driving the alternator is lost but the alternator remainsconnected to the supply network and the field supply also remains on. The alternator willa)get burntb)behave as an induction motor but will rotate in opposite directionc)behave as synchronous motor and will rotate in same directiond)behave as a synchronous motor but will rotate in a reverse direction to that corresponding to generator actionCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The driving power from the prime mover driving the alternator is lost but the alternator remainsconnected to the supply network and the field supply also remains on. The alternator willa)get burntb)behave as an induction motor but will rotate in opposite directionc)behave as synchronous motor and will rotate in same directiond)behave as a synchronous motor but will rotate in a reverse direction to that corresponding to generator actionCorrect answer is option 'C'. Can you explain this answer?.
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