Answer Posted / roysayan01

well let me answer my own question-

I'll let you know,measuring Corona loss is no child's
play.Even if you are well equipped in the field of power
transmission, errors would creep in.

The expression for corona loss is given by

Peek's equation

Pcl = (244/q)*(f+25)*(Sqrt(r/D))*(Vph -Vd0)^2 * 10^ -5
Kw/Kw/phase
You think that's complicated? There is more to come.

In the above expression r is the radius of the wire in
meters and D is the effective distance between the wires in
meters,f is the frequency of transmission voltage,Vph is the
voltage to neutral or the phase voltage and Vdo is the
Disruptive critical voltage.

q = Air density factor which is given by expression
((273)/760)* p/(273+t)

All the calculations for q are done by converting
temperature into Kelvin scale
273 K in the Standard temperature and 760 mm of mercury is
the standard pressure and they are taken into consideration
in the above expression.
p is the atmospheric pressure when measurement is to be done
and t is the temperature in degree celcius at that time

The expression reduces to q = 0.359p/(273+t)
Hold this tight we'll get back to it later on

Now we need only Vdo or the disruptive critical voltage(The
voltage at which corona effect occurs) to calculate the
corona loss

Vdo=go x m x q x rx ln(D/r)
go is the breakdown strength of air.It's about 30KV at
normal temperature.
m is the irregularity or roughness factor of the condutor
which is a given thing.
q is Air density factor which as discussed above
and D and r are the effcetive distance between conductors
and the conductor radius.

No we have all the required things to measure corona loss.
Putting all the values in right place in the Peek's
equation, we get the corona loss.

hope i explained the whole process vividly.

How do i right a ladder diagram that has 1 actuator that performs a full stroke followed by a half stroke

2075

---

diff.between servo motor and ac motor

2029

---

draw 3 phase rectifier diagram

2184

---

Which type of motor is used in trains, what is the rating of supply used explain working principal?

1268

---

Which contains in POLE ASSEMBLY of a 11KV Kirloskar-make SF6 (Model No-FP620A12)? Will u clarify with drawing?

2151

---

please give some hindalco placement papers for written exam

1793

---

what happen if the parallel generator phase angle shift by 1 degree in manual mode

2031

---

What is frantic effect?

1237

---

although ckt breakers have taken the place of old fuse. But instead of it , these older ones are still used in the industries and homes ? why .... what are their advantages and disadvantages ? which one is leading and winning the race and competition ?

1976

---

What will happen if the d.c. Machine is operated below rated speed?

1214

---

what is motor capacity of 80TR chiller? and also say what is the formula related temperature, motor capacity, TR?

2258

---

ow can i get certificate of competency as electrical supervisor and my diploma in electrical engineering from jalgaon.

2341

---

what is size of 3phase 4wire cable to be used for 11 ton ductable A.C and how to calculate cable size for different load

4002

---

working principle of AC Servo Motor with its construction

8863

---

What is industrial plc

1786

---