a 3 phase slip ring induction motor is wound for 4 poles on
stator and 6 poles on rotor; when 3 phase balanced voltage
source at 50 hz is applied to motor it will run at
a)1500rpm b)1000rpm c)750 rpm d)zero rpm
Answer Posted / bhautik patel
its bcoz Ns=120f/p
where Ns is the stator sychronous speed
f= supply frequency
p= no of supply poles i.e. stator poles
substituting values f=50 hz , p=4 ,
we obtain Ns=1500 r.p.m
Is This Answer Correct ? | 9 Yes | 4 No |
Post New Answer View All Answers
11 kg trivevter meter has rating of -/5amps. And pt ratio11000/110v and is connected with 11kv ct/pt unit of cr ratio 75/5amps. And pt ratio of 11000/110v while checking accuracy of meter with HT Accuchek meter what value of PT ratio and CT ratio to be filled in Accuchek meter
If the Brush of DC motor is shifted by 90 deg, then what happens to voltage and torque? Both voltage and torque are zero. how to justify the answer?
hi, could someone help me to find a control design for syncronising panel .
Transmission voltage is kept 11KV,33KV,66KV,132KV,220KV due to form factor. What happen to 400KV and 765KV transmission voltage?
hi plz send me reliance placement papers..i.e electrical technical papers that have been asked in reliance test.
what is saturation kit?which use above 15 kw motors panel side.
What is the difference between diesel generator engine with and without turbo charger with the same capacity?
what is counter poise conductors
Can we use BS 6651 and BS EN 62305 standards for computer room lightning ptotection in substation?
what is the reason the main breaker is trip during the motor is running? (some time the breaker is not trip)
What willbe change in programming when we use 5/3 solenoid inplace of 5/2 in operating of a cylinder?
what precautions to be taken while desigining a LT,HT panel. Eg-LT panel PCC panel with ACB installed. HT panel VCB panel with VCB installed. & what is main diffrence betwn IP54 & IP55 construction of panel.
Don't you have similar question banks related to Oral Certification Examination conducted by Mercantile Marine Departments / Directorate of Shipping, Ministry of Shipping for Electro Technical Officer?
WHY EARTHING NOT NEEDED IN BATTERY IN SUBSTATION
Why we make earth connection with Transformer Body and What will be the minimum size of copper wire as per code with respect to KVA rating of Transformer?