Dear All, Can anybody please tell me which value(saturated or unsaturated) of sub-transient reactance(Xd") we take for the calculation of fault current of the system?

2 Answers  

---

I NEED RRB CHENNAI (JE ELECTRICAL) QUESTION PAPER FOR LAST 5 YEAR AND I NEED RRB (JE ELECTRICAL) SYLLABUS.PLEASE SEND MY E-MAIL joo28_eee@yahoo.co.in

12 Answers   DFM, Hindustan Unilever Limited, JE, Pace, RRB,

---

why core of transformer in square or rectangular why not in circle or ellipse if this what happens

2 Answers  

---

What is Cement

11 Answers   ACC, L&T, Reliance Cement,

---

What is gain margin?

0 Answers  

---

what will be the breaking capacity of MCCB of 1000kVA (6% Impedence) transformer? Voltage being 415V, Power Factor 0.8.

2 Answers   BPC,

---

Give me the calculation steps to design an electromagnet to be work in 230V 50 Hz AC Supply. Also give force that is created by that electromagnet when it gets energized.

0 Answers   GE,

---

why ELCB's are not useful for operation theater equipments ?

4 Answers   Reliance,

---

Why we are use 11KV / 22KV / 33KV / 66KV / 110KV / 230KV / 440KV this type of ratio. why cant we use other voltage ratio like 54KV / 99KV et.,

8 Answers   College School Exams Tests, Hino, ITC Infotech, Reliance, UPRVUNL,

---

what is the difference b/w neutral and earth?what is the need of earthing and what are the different methods for earthing?

4 Answers   NTPC,

---

why in electric train we can't feel current & generally we have get socked in our normal electricity ?

3 Answers  

---

why we use Test Terminal Block in 11 KV and 33 KV electrical panels.

0 Answers   EMC,

---