In Railway,why we are used HT Line 25KV ?.why we are not
used 11KV,33KV and others for This?
Answer Posted / sandeep simhan
The choice of 25 kV was related to the efficiency of power transmission as a function of voltage and cost, not based on a neat and tidy ratio of the supply voltage. For a given power level, a higher voltage allows for a lower current and usually better efficiency at the greater cost for high-voltage equipment. It was found that 25 kV was an optimal point, where a higher voltage would still improve efficiency but not by a significant amount in relation to the higher costs incurred by the need for greater clearance and larger insulators.
Is This Answer Correct ? | 1 Yes | 0 No |
Post New Answer View All Answers
Why to keep capacitor bank off while generator running.
why various test are performed on electrical panels & power cables before commissioning on site & what are these test???
what are the effects when a salient pole alternator is run at high speed like 3000 r.p.m?
Why do we apply both Differential and REF (HV and LV) protection schemes on YNyn configuration of a transformer?
explain different losses in a transformer.
A jet of fluid strikes a plate What was the force required to counter it?
Safety of dry type transformer
Is there a standard depth of gravel fill in Substation Switchyard? Please give a design/drawing. Thank you.
Explain the difference between verilog task and verilog function?
what are the different sizes of U.G. cable & where these cabl;es are used according to voltage ..
Can any body tell gulf interview question for experienced electrical engineer ?
how to calculate the change over time for star delta starter for different KW motor?
What is the use of bundle conductors?
what is acceptable leakage current for 33kv cable while doing high voltage test for cable? how to calaulate the leakage current for 33kv or any rated cable?
I WANT TO INSTALL LIGHTING ARRESTOR ABOVE 20 FEET HEIGHT INDUSTRIAL BUILDING. NOW IT WAS 15 FEET HEIGHT HOW MUCH DISTANCE IT WILL COVER & HOW TO CALCULAT THE DISTANCE COVER BY THE ARRESTOR