Why we are use 11KV / 22KV / 33KV / 66KV / 110KV / 230KV /
440KV this type of ratio. why cant we use other voltage
ratio like 54KV / 99KV et.,
- 8 Answers
- 29613 Views
- College School Exams Tests, Hino, ITC Infotech, Reliance, UPRVUNL, I also Faced
- E-Mail Answers
Answer Posted / sagar khandey
When an alternator generates voltage, we always use a
multiple of 1.11 because for a pure sine wave the FORM
FACTOR is the ratio of rms value of voltage or current with
the avg. value of voltage or current and for pure sine wave
rms value of current is Imax/root '2' and avg. value is
2Imax/pie and which comes out to be 1.1;
We can't have a combination of other then a multiple of 1.11*.
So we can see all the voltages are made inevitably multiple
of this value (1.1, which is the form factor of ac wave).
Also it provides us the best economic construction of step
up and step down transformers.
In the case of a Square Wave ie. a digital wave, the RMS and
the average value are equal; therefore, the form factor is 1.
| Is This Answer Correct ? | 10 Yes | 6 No |
Post New Answer View All Answers
Please tell me the power flow from pmg to main rotor of an alternator (Including AVR unit)?
v/f drive basic princeple
how mass curve differs from hydrograph.
What are m circles?
what is the formula for computing cable tray size & capacity
what is the purpose of high speed earth switch in gas insulated substat
why the voltage and current in a long transmission line are called travelling wave?
Earth is a conductor or load?then ammeter connect to 3- phase supply,it shows the measurents or not?
Determine the BTU size of an aircon for 20 sq metre room
what is strip power factor?
explain supply side and demand side energy management with advantages & disadvantages
nwhat are the main Components of servo motor?
234 MVA Generator 3 phase Short circuit current Values required? Gen set Rating-234 MVA, Gen Voltage-18kv, PF;0.8, Xdv:23.5 %, Transformer Rating-18/380KV, 680MVA,Yndd1 two winding, Step up TR, ZT:35.50 %,X/R 4.33 Gen CB Position, CB open ,Disconnected open, Generator Running Voltage 18 Kv, Bi mistakes generator side earth switch Closed during that time short circuit current level in 3 Phase required, and how to test on site 234MVA Generator Short circuit current,
List of equipments required foe industrial repair lab.
What is the function of a neutral reactor.
