In Railway,why we are used HT Line 25KV ?.why we are not
used 11KV,33KV and others for This?
- 37 Answers
- 37658 Views
- Airtel, BSNL, RRB, I also Faced
- E-Mail Answers
Answer Posted / salah
The choice of 25 kV was not based on a neat and tidy ratio
of the supply voltage, but rather related to the efficiency
of power transmission as a function of voltage and cost.
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 25kV was
an optimal point, where an even 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 ? | 39 Yes | 7 No |
Post New Answer View All Answers
what about GD square and its important for motor design?
why all the feeders are designed in a particular manner ... is there any reason for that???
What is the universal motor?
what are the main faults that occur in stabilizers? How they corrected and resolved ? Types of stabilizers ?
what is the id1 & id2 setting in differential protection relay of CSPC?
How can we measure earthing resistance test (Earth meggar) of Transformer neutral pit while in live condition?.
Why auxiliary transformers are not connected in parallel in primary stations?
when it is possible kvrah lead & fundamental kwh be equal in electonic trivector meters (3 ph)
explain the process of commutation in a dc machine. Explain what are inter-poles and why they are required in a dc machine.
what maximum range of star & delta in hp or kw ?
Can any one provide the inspection procedure of MIMIC for VFD panel? Details: If someone wants to have a mimic in the VFD panel what are inputs considered for the mimic(like on,off,trip) whether we are able to add speed variation in the mimic(if so how can we get) and what are the parameters to be checked in the MIMIC during inspection?
how invertor convert the dc into ac give brif detail
where is the need for short circuit test for 3 see is required and why? can you explain in brief with application
Why is back emf used for a DC motor? Highlight its significance.
what does mean of RCT and STR in diffrential CT?
