Answer / ajay

follwing resion to use servo motor insted of induction motor
but only some cases where more accurate speed want
ex.positioning system,printing m/c,robotics m/c,etc

1>speed accuracy.
2>high torque at low speed
3>do not speed drop at high load.

The potential difference between a phase and neutral is 230v , but the potential difference between two phases is 400v. why?

4 Answers   HCL,

---

WHAT IS DEGREE OF COMPOUNDING IN D.C MACHINE MEANS? HOW TO READ THE OPERATING CHART FOR ANY ELECTRICAL MACHINES?

0 Answers   Coal India, Ghana Grid Company,

---

if i conncet ct with ct ratio of 600/5 to an energy meter having ct ratio of 100/5, the reading show by the meter will correct, if wrong is there any method to calculate correct value with shown value, if yes please state it.....

2 Answers  

---

wheather the size of windings in motor and generator are the same

0 Answers  

---

how much Hp motor is required for water suction pump in home uses ?

1 Answers  

---

---

What happen if transformer neutral path get removed ?

1 Answers  

---

how much excitation voltage required to generate 1mw power?

0 Answers   Saudi Oger,

---

Motor also having losses, we call KW rating. In transformer and generator having losses but we call KVA Rating why?

9 Answers  

---

A dc motor running on dc drive whose input is 3ph AC what will happen if we change the phase sequence of dc drive for e.g (R Y B) is connect as R B Y, will the motor run as same as previously running before changing phase without any effect

4 Answers  

---

if main CT is of ratio 50/5, and meter CT is -/5 what will be overall multiplying factor of meter.PT is 11000/110 .

0 Answers   BSNL,

---

A power transformer 4MVA/11KV/0.415Kv has been out of use in 12years. what maintenance actions/test need to be carried out before energizing.

0 Answers  

---

what is %impedanece

3 Answers   KSEB, Steel Plant,

---