Answer / shanmuganathan prathap

WE CANT CARRY HIGH CURRENT IN TRANSMITION LINE BCOZ NEED
BIG SIZE CONDUCTOR.THATS USING HIGH VOLAGE ACCORDING TO
P=VI SO V=1/I*P

Answer / lakshmi

at constant power for higher voltages the current is
reduced according to the equation P = V I cos (phi)
then I = P/V cos (phi)
reduced current means less losses and incresed efficiency.
and also the size of the conductor is less due low current.
hence it is economical to transmitt higher voltages.
thats why the generated voltages are stepped up to higher
voltages.

Answer / pandeyrahul

high current means more i*i*r losses which decreases the
efficiency

Answer / arunraj

Because to minimise power loss while transmitting.
For example: If power of 1000watts has to be transmitted to
certain distance through transmission line having a
resistance R ohm.If it was transmitted at 200volt, the total
power loss in transmission is

power=VI=1000watts

current=power/voltage=(1000/200)=5 Amps

power loss=(I*I*R)=5*5*R=25R watts
If it was transmitted at 2000 volts,

I=1000/2000=0.5 Amps
power loss=(0.5*0.5*R)=0.25R watts
now we can see that at high voltage transmission line
current is small. so we can use conductors with small
thickness instead large bars.

Answer / shahbaz shaikh

as we know that power transmission is depends on vtg and
current if we want to transmit high current then (as
current increases area and size ,cost incraeses) hence
transmission should be in high voltage

best manufacturer for busbar for outdoor switchyard having double bus bar scheme, can any one share technical specification of busbar. 132kv voltage ?

0 Answers  

What is different between hypo test and megger test

2 Answers   ABB,

What is a charge.?

4 Answers  

WHAT IS SHORT CIRCUIT STRENGTH OF 100 AMPS MCCB?

0 Answers   ACC,

what are upstream faults and downstream faults in power system

2 Answers   Sreetech,

Batteries used for electrical energy storage are a. Laclanche cells b. Edison cells c. Lead acid cells d.any of the above

0 Answers  

Why oil preferred over the air as a cooling medium for high rated transformer?

1 Answers  

why we maintain 50hz ,220volts,20Amp,ratings fixed every where in india,,electricity

1 Answers  

how i prepare for the written test in mahagenco?

2 Answers   MahaDiscom, MahaGenco, Wipro,

aternator every parts and its working

0 Answers   adag,

Why is remote backup preferred to local backup?

0 Answers  

What is a Servo Stabliser.

2 Answers