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

Is it possible we are step down 11 kv to 230v ?

2 Answers   Fedco,

what is meant by negative half cycle

2 Answers  

what is bus pt and what is the function of it

2 Answers  

What type of bulb used in small size cross symbol boder and original flame type(Deepam)?

1 Answers  

what is the type of pilot wire in pilot relay?

1 Answers  

how to check 3phase motor winding with help of multimeter?

2 Answers  

explain supply side and demand side energy management with advantages & disadvantages

0 Answers  

Why grounding is generally done in supply end?

1 Answers   ISRO, OFBL,

Why LVDT have secondary windings connected in differential 1. Higher out put 2. Based on the out put voltage-/+, helps to identify the direction of displacement 3. To establish a null/ reference point

1 Answers   GATE, PSPCL,

Witch do depand of Power factor and theory of power factor?

0 Answers  

what are the importance of earthing?list different types of earthing.

1 Answers  

what is power

6 Answers   ABB,