Answer / vivek

in a synchronous machine , there are three kinds of impedences

1. Xd - synchronous reactance ; (used in steady state
modelling )
a special case is salient pole machines where sync impedence
is split into direct axis impedence and quadrature axis
impedence , ie Xd and Xq . see double reactance theory for
more details
2. Xd' - transient reactance ;(used in transient modeling)
3. Xd'' - subtransient reactance .

all other machines have three kinds of impedences which are
used in power system modelling
1. positive sequence impedence
2. negative sequence impedence
3. zero sequence impedence

Answer / r

for a syn machine - syn impedance
fictious impedance
load impedance
normal case - input impedance
output impedance
transmission lines- surge impedance
load impedance

Why in DC drive u r using in Klin operation in Cement Plant?

7 Answers  

---

Are Refrigerators & Deep Freezers the Inductive load ? How to calculate the Power Factor & hence the Output Power for them ?

0 Answers  

---

What is the universal motor?

0 Answers  

---

if we going for high voltage usages what are the considering factors, why those factors are effected.... please give me an answer related motor factors like wnidnig, frame, temp etc

1 Answers   ABB,

---

Is it possible to measure the voltage of a battery from a single terminal?

0 Answers  

---

what is principle operation of transformer?

9 Answers  

---

what is the differnce between vector and phasor? are both same or there is difference between two term.?

6 Answers  

---

When we giving the 3 phase supply to ups system how to coming netural?

0 Answers   Juniper Networks, Tata Motors,

---

Does induction motor start with dc power supply????

4 Answers   Essar,

---

What is the meaning of BREAKING and MAKING CAPACITY in case of CIRCUIT BREAKERS.

2 Answers  

---

Write the programming software name for LG, SIEMENS,Messung,AB

0 Answers  

---

hi friends can u tell me name of the sites where i can get animation of electrical machines......

1 Answers  

---