why we use 25 kv in railway .not 11kv, or 33 kv
Answer Posted / pravin borkar
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 ? | 2 Yes | 2 No |
Post New Answer View All Answers
Hi friends, i m electrical engineer i want a cdr for migration purpose so anybody have information about this then send me on jayesh_ee88@yahoo.com.please try to me
What is the role of Dedicated earthing in UPS System?
Hi,I am working in abroad for more than 3 years in a company operating with 11kv and 6.4 MW power. I need c licence in India,can I? some other says only i can get if i work for 2 years in india only! anybody kindly clarify by doubt.Thanks
hi can any body send me syllabus of rrb electrical section engg... and past pepar also of any board...
Why back emf used for a dc motor? Highlight its significance.
Formulae for calculating the transmission line losses for different voltage levels
HOE WE CAN IMPROOVE BY USE OF CAPACITOR
The windings of a transformer are divided into several coils, because?
What are the section criteria for cables. Now everywhere XLPE power cable is used or PVC is also used?.
what happens when series resonance occurs?
A 3-phase IM is supplied from 50 Hz system. It runs at speed of 1440 rpm and slip equal to 4 %. Calculate number of pole pairs. A 1 B 6 C 2 D 3
what is destructive and non-destructive testing of welding
2. What are the parameters of EHT sub-station?
Will an earth leakage trip be activated if the component or wiring is faulty on low voltage equipment.Example An electrical Cat Scarer placed in the garden and water gets into the wiring.
he compression ratio for a petrol engine generally lies between