Answer / salahudeen

itis the ratio of for a given supply voltage the full load
current flowing though the secondary wdg when secondary is
short circuited.

EXAMPLE Given 100v the current is 5 A then 100/5=20

then pERcent=0.02

why this value?

it ios a crucial factor determining the current carrying
capacity of the protection/switch gear of the transformer
N/w

ie suppose rated current is 7 A then switvh gear capacity
=7+0.02(7)=7.15 A

Answer / y.vidya sagar

IT IS THE RATIO OF THE VOLTAGE DROP IN AN IMPEDANCE WHEN
FULL LOAD CURRENT IS FLOWING IN IT TO THE BASE VOLTAGE OF
THE SYSTEM.

Answer / somnath sharma

I think there is no difference in percentage impedance and p.u impedance except the basic one that is % impedance in calculated in per 100 while the p.u is calculated in per unit.
So if u simply multiply the value of p.u impedance with the 100, u will % impedance. I hope u must be knowing how to calculate p.u.

how you taken aotitude test

0 Answers  

---

CONTACTORS ARE MADE UP OF WHICH MATERIAL?

6 Answers   IOCL,

---

What is reverse power relay?

0 Answers  

---

what is use of governer in diesle engine

1 Answers   Aricent,

---

Why 9KV surge arrester having 7.65KV of MCOV?

0 Answers  

---

What is meant by shunt current?

1 Answers   ABC,

---

What happens when the polarity changes in CT? Explain briefly?

8 Answers  

---

if we convert kva into Ampers,which one formula use by us,pls tell me?

7 Answers   ABB,

---

how can we change the phase angle b/w two phase?

2 Answers  

---

Name of Hydrocarbon gases.

1 Answers  

---

How the Oil Surge Relay works? How it protect the OLTC?

3 Answers   JSL,

---

SMPS (Switch Mode Power Supply) unit is denoted by KW or KVA?

6 Answers  

---