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.

earth also having a gravitational force (magnetic field of north and south)but it attracts any object compare to this theartifical magnetic cant perform same as earth why?

0 Answers  

---

do you have some of interview Questions in power and genrator section in general whith answers

0 Answers  

---

capacitor applied voltage is 1100VDC & capacitance value is 82uF how to calculate current of capacitor.

2 Answers  

---

How to convert from HP to BHP please explain????????

1 Answers  

---

why nearly all the voltage levels are in the multiples of 11 like 3.3 ,6.6 ,33 ,11 kv.....

8 Answers   Suzlon,

---

my 10 hp submersible pump is tripping when connected through ELCB.I have checked the megger value of the coil's with body.It was found to be 0.2mega ohm.that is leakage is there.But when connected to mccb it is not tripping.no leakage current in the motor.Is it safe to connect to mccb? what are the problem's will arise if future?also tell me in ELCB no neutral is connected to motor.than how ELCB was working?

1 Answers  

---

what is difference between KW,KVA,KVAR? also give me the formula for all the three...

3 Answers  

---

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

2 Answers  

---

choose the non-switch device (A) transformer (B) diode (C) transistor (D) IC

3 Answers  

---

what is the relation between knowing of the distance between power transformer and the capacitor feeder in case of parallel operation

0 Answers  

---

how can findout cable fault Location only useing MEGGER

3 Answers  

---

wath is this mining of dg

2 Answers   Nokia,

---