Answer / viswakumar

% impedance is the voltage required to circulte full load
current in both HV and LV windings when the terminals of
the LV winding is shorted. This is just the SC test done
in the college lab.

For example if 5 % of 11KV circultes full load current in
the both 11KV side and 415 V side of a 11KV/415 volt
transformer then the % impedance of the transformer is 5%

Answer / abdulsubur

1000kva trasformer

1000/root3*.4=1445A=I flow in secondary current

400*5.75%=23

23/1400=.2 0hms

Answer / abdulsubur

impedence of trasformer = rated kva\root 3 *secondary
voltage

What meant by lagging and leading? When if they are occurred what preventive methods should be taken?

14 Answers   ABB, L&T,

---

Transformer TTR test procedure

2 Answers   Descon,

---

what is hormonics. how it is generated & what are the problem faced by that.

5 Answers   APC,

---

what is the use of CAPACITOR in CFL lamp?

6 Answers   Areva, Autopal,

---

what is the capacitance of a single conductor

6 Answers   Bhel,

---

---

How to know the following data of synchronous generator 1. D-Axis Unsaturated Reactance 2. D-Axis Unsaturated Transient Reactance 3. D-Axis Unsaturated Sub - Transient Reactance

0 Answers  

---

1.stranded resistance values of motors? 2.how to calculate the resistance values of single phase and 3phase motors?

2 Answers   Bell, L&T,

---

opkinson's test

0 Answers   Bhel,

---

what is the difference between changer, converter and transformer?

0 Answers  

---

What is the temperature and cooling aspects of dc motor

1 Answers  

---

whose motors self starting synchronous or Induction motor?give fact reason why not self starting another mother

2 Answers  

---

in 3 phase induction motor resistance value is how much

1 Answers  

---