In Railway,why we are used HT Line 25KV ?.why we are not
used 11KV,33KV and others for This?
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 is the problem of internal failure in ship engine telegraph system norcontrol?
wat is d diffr btw shunt coil and trip coil in VCB?
How Can I calculate for the photometrics requirements for a street lighting? Data given are: 45 units of 6 meter light pole with 150 watts metal halide lamp, 220 volts and installed in a promenade area.
Can an inverter be used as a converter? How?
what is motor capacity of 80TR chiller? and also say what is the formula related temperature, motor capacity, TR?
what is the difference between rectifier and converter and commudator?
What is super thermal power plant? and how it will differ from normal thermal power plant
State Maximum Power Transfer theorem.
What is effect on in zone and out zone fault if CT chosen for phase side is Vk/2<5mA and Neutral side is Vk/2<15mA on REF protection of Transformer
Why strting torqe high in inducation motor?
what is th basic difference between a d latch time line and a d flip flop time line???
What are gain margin and phase margin?
State the formula for overall efficiency of thermal power station
Define what is the function of anti-pumping in circuit breaker?
Can anybody just suggest about the scope of Electrical design with ETAP software?Just guide me?