why only 11kv level is used for transmission purpose? why
not 230v?

Answers were Sorted based on User's Feedback



why only 11kv level is used for transmission purpose? why not 230v?..

Answer / thowsif_emerson

One of the key concerns in the transmission of electricity
is the power loss in transmission lines, dissipated as heat
due to the resistance of the conductors.

High-voltage transmission lines are used to transmit
electric power over long distances. Normally, high voltage
(HV) transmission power lines are made of high voltage
(between 11 and 765 kilovolts) conducting lines of copper
and/or aluminum.

Assume the power to be transmitted is P, and the resistance
of the transmission line is r.
If the power is transmitted with voltage V, then the
current flow through the transmission line is I=P/V.

The power loss Ploss=I2*r=(P/V)2*r
Since P and r are fixed conditions, less power will be lost
if high voltages V are used.

Is This Answer Correct ?    12 Yes 2 No

why only 11kv level is used for transmission purpose? why not 230v?..

Answer / nazeer

if voltage increase current decrease.in this way if we use
high voltage for transmission flow current can be reduced so
cable size and current loss can also be reduced.

Is This Answer Correct ?    6 Yes 1 No

why only 11kv level is used for transmission purpose? why not 230v?..

Answer / sunil guru

As we move on to high voltages the current rating reduces(HV,EHV,UHV)AT ultra high voltages the current is very less (1150 kv and above)so the conductor size is less and thus the losses are less...... so high efficiency ........

R=(P*L)/A

FROM ABOVE EQ. IF AREA OF CONDUCTOR REDUCES SO RESISTANCE ALSO REDUCES AND AREA REDUCES ONLY IF CURRENT RATING IS REDUCED AND THAT IS POSSIBLE BY TRANSMITTING THE POWER AT HIGH VOLTAGES.

IF WE TRANSFER POWER AT SAY 230V THEN RECEIVING V WILL BE VERY LESS . REASON IS ALL POWER WILL BE DISSIPATED TO LOSSES..

FOR ANY DISAGREEMENT MAIL ME AT parmar20072008@yahoo.com

Is This Answer Correct ?    3 Yes 0 No

why only 11kv level is used for transmission purpose? why not 230v?..

Answer / amarjeet sinha

230 V Supply is very low for transmission and this isn't
acceptable to transmission range. minimum value of
transmission of high tension line is 11Kv.

Is This Answer Correct ?    3 Yes 5 No

why only 11kv level is used for transmission purpose? why not 230v?..

Answer / guest

Medium Voltage (11KV) is used for transmittion purpose
cause it reduce the size of cable. V=IR. The cable would be
large if 230V is used for transmittion since current would
be large. Basically, reduce the cost of transmission.

Is This Answer Correct ?    3 Yes 6 No

why only 11kv level is used for transmission purpose? why not 230v?..

Answer / raja

Main pupuose is Core loss

Is This Answer Correct ?    0 Yes 3 No

why only 11kv level is used for transmission purpose? why not 230v?..

Answer / dev

Min vol. for transmission is 33 kv not 11 kv
11 kv is max. distribution voltage

Is This Answer Correct ?    2 Yes 5 No

Post New Answer

More Electrical Engineering Interview Questions

What is the difference between MCB & MCCB, Where it can be used,

22 Answers   ACB Group, Badve, Bajaj Electricals, Hensel, Siemens, SR,


in DG synchronization system can i short R,Y,B- phase(DG-1) to R,Y,B Phase (DG-2), HOW IT WORK . WHAY WE NEED TO SYNCHRONIZATION.

1 Answers  


What is the unit of charge and current?

0 Answers  


we have require a Motor (1500kW, 6.6kV, 50Hz) which shall operate at 1500rpm during 30min and after it shall run on 500rpm during 15min. The same cycle shall be repetitive during the whole working days. Which method is best and economic to achieve such type of task. VFD, VVFD, Pole changing motor etc.

0 Answers   MTN,


Does RCCB do the job of MCB? Lets take 16A RCCB. it trips when residual current exceeds 30mA. does it trip in an over current situation, i.e when current exceeds 16A ??

2 Answers  






Why voltage regulation of an alternator is negative for a leading power factor?

3 Answers  


Why Transformer in KVA?

41 Answers   APCPDCL, Apollo Power, College School Exams Tests, Electrical Tech, Hitech, HP, L&T, MDL, Oil and Gas Jobs, TATA,


List some examples of renewable energy?

0 Answers  


plz send me the placement interview question and answers of whizchip(technical and apttitude)..i have an interview in next.

0 Answers  


how to choose the cable rating for load (KW)? EXAMPLE.50KW load

14 Answers   ACC, NCUI, Polycab, PowerSol, Siemens, SW,


What is effect of low pf on HT supply.

6 Answers  


What is the formula to calculate the no load current of a single & three phase induction motor

0 Answers   HCL, Nokia,


Categories
  • Civil Engineering Interview Questions Civil Engineering (5084)
  • Mechanical Engineering Interview Questions Mechanical Engineering (4451)
  • Electrical Engineering Interview Questions Electrical Engineering (16631)
  • Electronics Communications Interview Questions Electronics Communications (3918)
  • Chemical Engineering Interview Questions Chemical Engineering (1094)
  • Aeronautical Engineering Interview Questions Aeronautical Engineering (239)
  • Bio Engineering Interview Questions Bio Engineering (96)
  • Metallurgy Interview Questions Metallurgy (361)
  • Industrial Engineering Interview Questions Industrial Engineering (259)
  • Instrumentation Interview Questions Instrumentation (3014)
  • Automobile Engineering Interview Questions Automobile Engineering (332)
  • Mechatronics Engineering Interview Questions Mechatronics Engineering (97)
  • Marine Engineering Interview Questions Marine Engineering (124)
  • Power Plant Engineering Interview Questions Power Plant Engineering (172)
  • Textile Engineering Interview Questions Textile Engineering (575)
  • Production Engineering Interview Questions Production Engineering (25)
  • Satellite Systems Engineering Interview Questions Satellite Systems Engineering (106)
  • Engineering AllOther Interview Questions Engineering AllOther (1379)