Answer / infodoss

Induction motor air gap is less:
To avoide the noise.
To improve the power factor.
To avoide the leakage flux.
Induction motor is operated in induction principal so
distance between rotor and stator is less.

Answer / ujjal das

1)Lesser air gap of I.M. result in less magnetising current
(which is lagging reactive component of current)causing
better p.f.
2)Lesser air gap of I.M. result in less noise.
3)Better utilisation of stator flux.
In S.M.AIR GAP IS NOT A GOVERNING FACTOR OF P.F.

Answer / arunkumar

as the stability critera is main in the synchronous m/c
the air gap length is more even though size and weight
increases with redused power factor ,where as there is no
stability criteria to be satisfied in I/M more
concentration is taken for power factor inprovement by
providing less air gap

Answer / rahul

In induction motor power factor depends on air gap ,if air
gap more then power losses occured due inductive reactance
which lag power factor, power absorb by motor interms heat
increases. but in case of sych motor power factor depends on
stator exiatation,E>V POWER FACTOR LEAD.E<v then power factor
lag,so we have to maitain stator exiatation rather than the
air gap

what is safety measures of transformers.

16 Answers   Amtek, Hotel Jobs, HP, RMU, SKFM, Taj Group,

---

How calculate the Transformer Impedence With Example

3 Answers  

---

what is the use of providing earthing for tanks? i know for lightning we use earthing ? Here one of my ONGC project there is no need of lightning protection and there is no power connection near by tank in that situation also ONGC asking earthing for tanks but we didn't understanding why they asking earthing? is anybody tell exact answer?

4 Answers  

---

I am selected in OCL(Orissa cement Limited), but they have a Tech PI round their at their plant.Anybody has any idea that what kind of questions they are going to ask??Please guies help me. I am in serious headache.I have heard that huge elimination is done at there.

0 Answers  

---

why +24 v and -48 v give to BTS? If -48v protect from surge then why we not use -24 v?

0 Answers  

---

---

if neutral earthing is weak of a system then how can we improve it ? Technically explanation ??

1 Answers   CS, L&T,

---

sir what is the purpose of SF6 in HT breaker and what is the pressure should be maintain in the breaker?

2 Answers   Kirloskar,

---

1. What are the tests to be carried out for CBCT? 2. can measure the secondary resistances? 3. with respect to secondary maximum how much voltage can be applied for IR test.

0 Answers  

---

can we apply kirchhoff's laws to circuits containing non linear elements?

3 Answers   Metro,

---

wat is the function of an inductor? examples.....

4 Answers  

---

how does it help for selection of a transformer.

0 Answers  

---

what is doid

0 Answers  

---