Answer / s c budhiraja

because starting torque requirement of fan is more than the
motor can supply.when we push the fan by hand the torque
requirement for running the fan is supplied by the fan
motor.

Answer / jay krishna

It is occurred by magnetic locking

Answer / tomboi

Is because of the accumulated dirt inside the fan shaft.
Clean it and apply some oil lubricant on the shafts an it
would rotate again as normally as how it was before when it
was clean.

Answer / mohit midha

Coz Railway fan runs through Dc
So There is no capacitor in that so that if there is any
jam by some mean then we can can rotate slightly manual.

Why positive terminal of DC 48V was earthed?

1 Answers  

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Please brief me about number of pole in alternator.In single phase alternator coils are connected in star or series. How to calculate frequency for the same.

0 Answers  

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where connected OLTC for transformers?

3 Answers   Apollo, CBRE,

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why transformer rating in KVA ?

8 Answers   Bhel, TATA, Voltage,

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we have 2.2kw,Y,3000rpm motor but 6leads found in TB what happen if we connect in delta?

0 Answers  

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how we can select MCB ratings according to Voltages, Curves.

2 Answers  

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There is two transformers of 2MVA & 3MVA, which transformer is located at the sending end & which is at receiving end. why?

3 Answers  

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what is the function of anti-pumping in circuit breaker?

20 Answers   Aditya Birla, INEL, NCC,

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what is surge impedance loading?

1 Answers  

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When electric field is parallel to the plane of incidence, the electromagnetic wave is said to be a.Linearly polarized b.circularly polarized c. Elliptically polarized d. Hyperbolically polarized

1 Answers  

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what is rotatng magnetic field in case of three or multiple phase alternating current machines???

1 Answers   NHPC,

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how much UPS neutral erath leakage current.

0 Answers   HP,

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