A 3-phase IM is supplied from 50 Hz system. It runs at speed
of 1440 rpm and slip equal to 4 %. Calculate rotor
frequency.
A 50 Hz B 0 Hz
C 4 Hz D 6 Hz
- 3 Answers
- 3721 Views
- I also Faced
- E-Mail Answers
Answer Posted / varaprasad
ANS: 2Hz
Rotorfrequency = s×frequency of applied voltage to stator = sf
SO,
ROTOR F = 0.04*50=2Hz
| Is This Answer Correct ? | 7 Yes | 0 No |
Post New Answer View All Answers
Q: How to calculate Transformer losses , tell us by Formula.
in my working site. momentary jerck in electrical supply ocurred frequently which cause of multiple losses in our electrical equipements. how can we protect our electrical machines and equipements in this situation.
What are the types of windings present in the ceiling fan? What winding will be effective first when we started the fan?What are the resistance and inductance ratios comparatively at the initial speed and full speed of the fan?
Why auxiliary transformers are not connected in parallel in primary stations?
What is the need for a controller?
List the power rating of any 5 important electrical appliances used in houses.
Phase control and integral control are used for?
how the synchronizing is obtained at bus couplers in grid substation? (because there we cannot change the frequency in one of transmission lines like in generator synchronization)
what is sevice settings for mccb?How can be it setted?
State kirchoff current law?
please give some hindalco placement papers for written exam
On what principle electric motor works?
In parallel operation time both NGR’s close or not close if both close what will happen
What is the magnetic field (coil DC ) of Turbo Expander?
which is the most advanced form of SF6 BREAKER?Can we use other gases to quench the arc?
