Answer / sohail

Normally D.C excitation is used for exciting the field wdg
of generator. A.C excitation is also used but through
rectifier and supplied through brushes and sliprings.

Nowadays brushless exciter with field ckt on stator and
armature on rotor with rectifiers are used, directly
connected to the field wdg ,eliminating the use of brushes.

Answer / qasim ali

there are two types of exitation:
rotary
static

rotary:in it , dc generator is used for excitition, that have the combination of sliprings n carbon brushed,this generator has a moving rotor n static stator..sliprings converts the axial motion of current to radial,and then dc frm this generator is given to poles of ac generator..

static:

here ac supply is taken from reserve power distribution center(rpdc) i.e frm 11kv or smthng else trnsmissin lines n then it is stepdown 400v by excitation trnsfrmr n then this ac passes through rectifier bridge .and then it goes to poles of ac genrator....

Answer / lashari

In the small Generators the batteries are used for excitation while in big generators the excitor in built in machine on the rotor of generator which is dc small generator to provide excitation current. so there are two types of excitation i) seperately excited and self excited discussed later..
www.bestarticlez.com

How to choose primany and secondary side MCB

1 Answers  

---

1.What is isolators and bus bars?give answer in details

2 Answers  

---

What is Negative Potential Bias

0 Answers   TATA,

---

Two electronic energy meters are connected to seperate phase wires, but connected to a looped neutral. Are these going to function correctly?

8 Answers   DRDO,

---

why transformer is rated in kva?

2 Answers  

---

---

What is the unit of vaccum?

14 Answers   Manhattan,

---

Can anyone explain how the vector diagram of a transformer which doesn't have name plate be found whether it is Dy11/Dy5/Yd11 and so on?

4 Answers   TATA,

---

An ISP is granted a block of addresses starting with 150.80.0.0/16. The ISP wants to distribute these blocks to 2600 customers as follows. a) 200 medium size businesses; each needs 16 addresses b) 400 small businesses; each needs 8 addresses c) 2000 households; each needs 4 addresses Design the subblocks and give the slash notation for each subblock. Find out how many addresses are still available after these allocations.

0 Answers   UOG,

---

where the protection CT in neutral of transformer be located, before bifurcation or after bifurcation and why.

2 Answers  

---

If our power factor is lagging then who is in profit? I mean consumer or Supplier!

1 Answers   Sail,

---

What is dielectric loss?

0 Answers  

---

what is the function of AVR in generator? how the generator maintain the frequency while varies the load?

1 Answers  

---