Follow Our FB Page << CircleMedia.in >> for Daily Laughter. We Post Funny, Viral, Comedy Videos, Memes, Vines...

why we use 25 kv in railway .not 11kv, or 33 kv

Answers were Sorted based on User's Feedback

why we use 25 kv in railway .not 11kv, or 33 kv..

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 1 No

why we use 25 kv in railway .not 11kv, or 33 kv..

as per load requirement(TRACTION MOTOR, DC SERIES WOUND
MOTOR 782V, 250AMPS) They have selected this 25kv. because
using transformer power can not be varied voltage or
current may vary but power remains same.

 Is This Answer Correct ? 9 Yes 11 No

More Electrical Engineering Interview Questions

i want to know that what is the eligibility critaria for ongc exam?

what is power system transient condition

What is the intent of short circuit studies?

What is battery Limit ?

will the turbogenerator operate on leading power factor with out modification in the stator winding.

what is a bus post insulator? explain its application in a substation.

A group of machines (wind turbines) connected with 33KV feeder and each machines are having individual VCB. The 33KV feeder connected with 110KV/33KV substation. The 33KV feeder tripped by over current at Substation and fault recorded at Substation as OC-R&Y phase. Same time the group of machines VCB tripped by over voltage, the fault recorded voltage was above 66KV by numerical Under/Over voltage relay. While grid drop time, this much of voltage hike is possible?

state basic meaning of 'INDUSTIAL AUTOMATION'?

what is function of INVERTER

Which one is given high energy in same power consumption AC or DC

What is Difference Between Induction Motor & Servo Motor

what are the insulation properties.

Categories
• Civil Engineering (5075)
• Mechanical Engineering (4444)
• Electrical Engineering (16597)
• Electronics Communications (3915)
• Chemical Engineering (1092)
• Aeronautical Engineering (214)
• Bio Engineering (96)
• Metallurgy (361)
• Industrial Engineering (258)
• Instrumentation (2987)
• Automobile Engineering (332)
• Mechatronics Engineering (97)
• Marine Engineering (123)
• Power Plant Engineering (170)
• Textile Engineering (575)
• Production Engineering (0)
• Satellite Systems Engineering (106)
• Engineering AllOther (1377)