In electrical locomotive engines, the DC series motors is being used as traction motor. But in new engines like in WAP7 & WAG9 the 3-phase squiral cage induction motors has replaced them. So can someone tell me the advantages of induction motor over dc seris motor in engines points of view....???

0 Answers   RRB,

---

how the speed of the gets motor regulated. does it draw the same current on the all speed level.

0 Answers   Danko,

---

my question is that....few days ago i had installed a three phase motor starter for an electric saw.the motor will run and make the hydraulic pressure which will be goes to pressure cylender by up and down lever.two number of limitswitches are also installed on cylinder for safety of motor.now when the arm of cylinder reaches to the upper or lower limit it will cut the motor's line.and motor will be stop.now wana know that what will i do that motor runs continue after the limitswitch cut it down but it shold not be made any pressure.pls answer me in brief.

3 Answers  

---

Where earth point should provided in Ships or Submirines.

2 Answers   SSC,

---

what is F.A.P in fire alarming system?

3 Answers  

---

Why are transmission lines multiples of 11? Is it because of some historic reason ? Or is there a scientific base to it?

5 Answers  

---

why bucholtz relay placed inclined in transformer?

1 Answers  

---

why is the number of turns different in current and potential coils of wattmeter..?

1 Answers  

---

11KW Delta motor is taking about 44Amps in star and goes upto 70Amps in delta and trips OFF. The rated current is 26Amps. Application is for the blower. The motor takes ( no load without coupling impller ) only 2.5A and 5Amps in star & delta starter test.Need to know why its taking high current.

10 Answers   Pfizer,

---

What is difference between Sample test and Routine test in safety standard?

0 Answers   Chicony Electronics,

---

Why electric traction is used ??

3 Answers   IOCL,

---

In a 132KV Grid Station where voltage level is 132KV, here,  why the rating of Surge arrests installed 120KV ? 

1 Answers  

---