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A 7.46 kW, 230 V 3-phase, 6-pole squirrel -cage induction motor operates at a full-load slip of 4% when rated voltage and rated frequency are applied. The speed of rotation of the stator m.m.f. is
- a)960 r.p.m.
- b)1000 r.p.m.
- c)1200 r.p.m.
- d)1120 r.p.m.
Correct answer is option 'B'. Can you explain this answer?
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A 7.46 kW, 230 V 3-phase, 6-pole squirrel -cage induction motor operat...
The stator m.m.f. revolves at synchronous speed.
Synchronous speed,
Synchronous speed,
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A 7.46 kW, 230 V 3-phase, 6-pole squirrel -cage induction motor operat...
Calculation of Synchronous Speed:
The synchronous speed of a three-phase induction motor can be calculated using the formula:
Ns = (120*f)/P
where,
Ns = synchronous speed in revolutions per minute (r.p.m)
f = supply frequency in Hertz (Hz)
P = number of poles
Substituting the given values, we get:
Ns = (120*50)/6
Ns = 1000 r.p.m
Calculation of Full-load Speed:
The full-load speed of an induction motor is given by:
N = Ns(1 - s)
where,
N = speed of the motor in r.p.m
s = slip of the motor
Substituting the given values, we get:
N = 1000(1 - 0.04)
N = 960 r.p.m
Therefore, the speed of rotation of the stator m.m.f. is 1000 r.p.m, which is option B.
The synchronous speed of a three-phase induction motor can be calculated using the formula:
Ns = (120*f)/P
where,
Ns = synchronous speed in revolutions per minute (r.p.m)
f = supply frequency in Hertz (Hz)
P = number of poles
Substituting the given values, we get:
Ns = (120*50)/6
Ns = 1000 r.p.m
Calculation of Full-load Speed:
The full-load speed of an induction motor is given by:
N = Ns(1 - s)
where,
N = speed of the motor in r.p.m
s = slip of the motor
Substituting the given values, we get:
N = 1000(1 - 0.04)
N = 960 r.p.m
Therefore, the speed of rotation of the stator m.m.f. is 1000 r.p.m, which is option B.
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A 7.46 kW, 230 V 3-phase, 6-pole squirrel -cage induction motor operates at a full-load slip of 4% when rated voltage and rated frequency are applied. The speed of rotation of the stator m.m.f. isa)960 r.p.m.b)1000 r.p.m.c)1200 r.p.m.d)1120 r.p.m.Correct answer is option 'B'. Can you explain this answer?
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A 7.46 kW, 230 V 3-phase, 6-pole squirrel -cage induction motor operates at a full-load slip of 4% when rated voltage and rated frequency are applied. The speed of rotation of the stator m.m.f. isa)960 r.p.m.b)1000 r.p.m.c)1200 r.p.m.d)1120 r.p.m.Correct answer is option 'B'. Can you explain this answer? for SSC 2024 is part of SSC preparation. The Question and answers have been prepared according to the SSC exam syllabus. Information about A 7.46 kW, 230 V 3-phase, 6-pole squirrel -cage induction motor operates at a full-load slip of 4% when rated voltage and rated frequency are applied. The speed of rotation of the stator m.m.f. isa)960 r.p.m.b)1000 r.p.m.c)1200 r.p.m.d)1120 r.p.m.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for SSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A 7.46 kW, 230 V 3-phase, 6-pole squirrel -cage induction motor operates at a full-load slip of 4% when rated voltage and rated frequency are applied. The speed of rotation of the stator m.m.f. isa)960 r.p.m.b)1000 r.p.m.c)1200 r.p.m.d)1120 r.p.m.Correct answer is option 'B'. Can you explain this answer?.
A 7.46 kW, 230 V 3-phase, 6-pole squirrel -cage induction motor operates at a full-load slip of 4% when rated voltage and rated frequency are applied. The speed of rotation of the stator m.m.f. isa)960 r.p.m.b)1000 r.p.m.c)1200 r.p.m.d)1120 r.p.m.Correct answer is option 'B'. Can you explain this answer? for SSC 2024 is part of SSC preparation. The Question and answers have been prepared according to the SSC exam syllabus. Information about A 7.46 kW, 230 V 3-phase, 6-pole squirrel -cage induction motor operates at a full-load slip of 4% when rated voltage and rated frequency are applied. The speed of rotation of the stator m.m.f. isa)960 r.p.m.b)1000 r.p.m.c)1200 r.p.m.d)1120 r.p.m.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for SSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A 7.46 kW, 230 V 3-phase, 6-pole squirrel -cage induction motor operates at a full-load slip of 4% when rated voltage and rated frequency are applied. The speed of rotation of the stator m.m.f. isa)960 r.p.m.b)1000 r.p.m.c)1200 r.p.m.d)1120 r.p.m.Correct answer is option 'B'. Can you explain this answer?.
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