why a pilot exciter is used in combination with the main exciter? why not only a main exciter is used for excitation to an alternator?

1 Answers   Electrical,

---

what is mean by current? and voltage?

4 Answers  

---

What shall be the secondary output voltage if the primary winding of a 220/6V, 50 Hz transformer is energized by an 110V, 60 Hz supply?

0 Answers   HPCL,

---

what is percentage impedance of transformer? explain its significance

2 Answers   ABC, Bosch,

---

why -48 volts dc used in telecommucation

0 Answers  

---

---

What will be the output voltage of a transformer if it is primarily energized from a square wave voltage source?

0 Answers   HPCL,

---

what is the differance between MC61C and MC61A relay of L &T make.

1 Answers   BARC,

---

Why alternators are designed at 0.8 pf lag?

3 Answers  

---

What is the reasonable voltage between Neutral & Earth of an electrical system for good earthing?

6 Answers   HAL,

---

How can ignition voltage of light increased with the help of a ballast

1 Answers  

---

what is meant by VFD ?where its useful ?

7 Answers  

---

How to Calculate The sag of OPGW in Transmission Line???

0 Answers   Zenco Systems,

---