Why armature rheostat is kept in maximum position?

0 Answers  

---

If a fan get trip and run in reverse direction due to system flow. Now in this condition during starting how can a VFD bring this negative speed to zero and later run in forward direction?

2 Answers   Aditya Birla, Siemens,

---

How to work E.L.C.B and how to connect in circuit.

0 Answers  

---

why alternator is used instead of dc generator and induction generator

1 Answers  

---

At which time Synchronous generator act as a Synchronous Condenser?

4 Answers  

---

we can use airconditioner for cooling the winding of transformer ,if not why?

3 Answers  

---

pls define kvarh

2 Answers  

---

What is primary distribution and secondary distribution of ac power?

3 Answers  

---

Which factor decide the colour of the light emitted from a Led?

3 Answers  

---

A distribution transformer giving afrequency of 200HZ, where it is rated for 50HZ. when it will occure?

2 Answers  

---

in the directional overcurrent and earthfault protection,normally we are setting the angle 45 deg lead for phase fault overcurrent and -45 deg lead for earthfault fro forward direction.but both the fault are operating on the same angle region only.why?how the relay will response?

0 Answers  

---

If an electrical component has a positive temperature coefficient, how come such components have high power losses due to heat if current decreases when resistance increases? assuming power given by I^2*R whereby the Resistance is infinite.

0 Answers  

---