Answer / sunil. g

As the name itself suggest us in a DC gear motor the
position is predefined ie a cogwheel has a equidistant
teeth, but a stepper motor is one which can be controlled
very precisely. It all dependes on the position you ermark
if you know the exact position you can use DC Gear motor if
it is different angle which is not uniform you can use
Stepper motor.

In CDG type IDMTL realy O/L , E/F, O/C which are used for out going feedrs,on R-phase o/c element, Y-phase , e/f elecment and on b -phase o/c element will be connected . Why the earth fault on center phase only, why not on other two phases?

2 Answers  

---

How to Calculate Stc Rating of an indoor type VCB Panel? What is a full form of STC?

1 Answers   ABB,

---

is high voltage or high current is danger

16 Answers   L&T,

---

please tell me how a surge protector work on a DC 48Volt.? please describe briefly.

0 Answers  

---

How will you explain transformer action in case of 3-phase induction motor?

4 Answers  

---

Why -48V dc power supply using in telecom field?

7 Answers   APC, Cisco,

---

why the power cut problems occur in tamil nadu? may i know the exact reason.plz

17 Answers  

---

What shall be the minimum distance to be maintained between two power cable in a common trench?

3 Answers  

---

Slow acting fuses are most often used for which application a) Lighting circuit b) heating circuit c) Motor D) Radar circuit

1 Answers  

---

what is the difference between the following 2 situations ? 1)Line & Neutral=240V Line & Earth=230V Neutral & Earth=10V 2)Line & Neutral=230V Line & Earth=240V Neutral & Earth=10V

2 Answers   Reliance,

---

why aggregate is placed all around substation ground.

1 Answers  

---

all interview questions with answers of ntpc (2000-2009

0 Answers   Hetero, NTPC,

---