Answer / k.prakashchandra

Percentage impedance is only a percentage as it is
percentage of I x Z / V and the unit of I x Z is V. V/V is 1

Answer / euclid

Transformer impedance is a ratio
of the transformer’s normal full load current
to the current available under short circuit condition.It was stamped on every transformer nameplate. Why did they stamped it because it is a tested value after the transformer has been manufactured.

Answer / afsal

Percentage impedance is the ratio of voltage drop on full load due to winding resistance and leakage reactance to the rated voltage of the transformer.
Z%= Vd/Vr *100

this can varied at the design stage by varying voltage per turns and geometrical size of the windings.

What is power factof?

21 Answers   RRB,

---

why our indian system choose the 230 volt for single phase&415 for 3-phase voltage,in forign side 110 volt is used what is the difference

4 Answers   Jindal,

---

What is Long rod insulator and it's applications..? merits over the disc insulator ..?

0 Answers  

---

Does frequency change with increasing voltage i.e 220v to 11kv? explain if not?

6 Answers  

---

how to select the no. of brushes in a lap winding?

0 Answers  

---

what is static electricity and how it generates?

2 Answers  

---

tell me about sf6 breakers

4 Answers  

---

why protection meter is always connect to star

1 Answers  

---

Why are iron cores in transformers made laminated?

0 Answers  

---

In power plants the reading changes abruptly to give value (MW -25) (MVAR -15) What are the reasons for this? What is the solution?

2 Answers   GE,

---

why farmers are use earthing instead of neutral for their light conec. at field.is it safe

2 Answers   Honeywell,

---

in 132kv substation CRT means

0 Answers  

---