Answer / pavan kumar

in case of slip ring induction motor harmonics occur due to
rotor conductor slots ie., due to non uniform air gap and
also due to improper design

For a spring controlled governer the relation F = ar+b (F is the controlling force, r is the radius of rotation a and b are constants), indicates that the governer is

0 Answers   Caterpillar,

---

When we use air circuit breaker, it has O/L protection ,time delay SC protection, Instataneous SC protection & ground fault protection. They all have some setting range. But what is the suitable/allowable setting for the above protection which will be safe for the equipment? For example-O/L protection setting have a range of (0.4,0.45,0.5,0.55,0.6,0.65,0.7,0.8,0.9,1.0)xIn Time delay SC protection have a range of (1.25,1.5,2,3,4,6,8,10,12)xIn Time delay setting is 0.02,0.1,0.2,0.3,0.4 Instataneous setting is fixed to 20xIn Gound fault setting is given 100A,300A,600A,900A,1200A This setting are for 2500A ACB. So what will be the basic allowable setting for the above protection? is there any formulae to calculate this<

0 Answers   Lupin,

---

What is the alternate solution for testing of polarity by using polarity tester while its milli ammeter does not works?

0 Answers  

---

What is encoder, how it function

9 Answers   Coca Cola,

---

which type of motor is used in lift ?

7 Answers  

---

Pl.brief me any electrical major fault you have rectified.

0 Answers  

---

I meggared my 2c*70 sq mm AL AR XLPE cable. its one end show 50 M ohm . is my cable is safe for laying. I have only one phase and neutral.

0 Answers  

---

what is electricity

4 Answers  

---

What are the causes of electrical faults?

1 Answers  

---

1.How to calculate backup time from series connected battery of 12v dc with 26Ah for 2battery?

3 Answers  

---

why do we prefer a 3-phase delta connected load rather than star connected?

4 Answers  

---

kindly tell me how the load on generator increase by just increasing the fuel of prime mover, as if for exampple 20 MW gen set is synchronized the load ramps from zero to 20 MW gradully and during this procress only fuel of prime mover increases. Which thing determines the load on generator with respect to fuel

4 Answers   Birla,

---