Interested to Buy Any Domain ? << Click Here >> for more details...
why the voltage transmission is always in a multiple of 11?
e.g. 110 V, 220 V, 33 kVA, 11 kVA
- 16 Answers
- 45496 Views
- IAF, MahaGenco, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / girish
B'coz Form Factor of AC Sine Wave is 1.1 so Transmission
Voltages will always be the integral multiples of 11
for eg. 220, 440, 660, 1100, 3300, 6600, 11000, 33000,
66000, 110000
Form Factor = RMS Value of Sine Wave / Average Value of Sine
Wave
RMS Value = 0.707
Average Value = 0.683
0.707 / 0.683 = 1.1
| Is This Answer Correct ? | 103 Yes | 28 No |
Answer / anirban dasgupta
The real reason is not form factor. Because now 400kv, 765kv, 1200kv(yet to be commissioned) are transmitted.
The real reason is actually due to a misnomer that started in the olden days. According to them, some voltage was always lost and they accounted it to be 10% of the transmitted voltage. So they always transmitted voltages 10% above what they required. For example if they wanted to transmit 100kv, they used to transmit 110kv, similarly 200kv - 220kv; 10% higher than what is actually required. That is why this multiple of 11 was there.
But now a days with advance protection schemes, people are transmitting voltages of the order 400kv, 765kv etc
| Is This Answer Correct ? | 21 Yes | 5 No |
Answer / engineered
whosoever asked this question first note that,
Transmission line voltages ranges from
33kV, 66kV, 132kV, 220kV, 440kV
& not 110V, 220V, 33kVA, 11kVA...........
& Form factor is the ratio of RMS/Average value which
equals 1.11
if we consider 10kV, then the voltage should come 11111V
but the case is we get 11000V.
Think on it guys, 11kV has nothing to do with form factor.
| Is This Answer Correct ? | 20 Yes | 11 No |
Answer / remo
To maintain foem factor voltage transmission is always in a
multiple of 11.
ex-
Form Factor = RMS Value of Sine Wave / Average Value of Sine
Wave
RMS Value = 0.707
Average Value = 0.683
0.707 / 0.683 = 1.1
| Is This Answer Correct ? | 16 Yes | 12 No |
Answer / prabhat kapoor
b'coz in transformer,the form factor value is multiple of 1.1.that's the reason.so it is always in multiple of 11.
| Is This Answer Correct ? | 23 Yes | 21 No |
Answer / rachel
Still i can't understand what the people actually saying about the form factor...so what if form factor is 1.11?it just an ratio that relates both rms and avg values....and we have learnt that whatever voltage that we are transmitting it is only rms so how avg value comes in picture?someone pls correct...
| Is This Answer Correct ? | 4 Yes | 4 No |
Answer / psingla
It's bcoz of form factor which is.
rms value/AVG.value both values are considered bcoz we can get both half & full cycle of AC current
RMS value=0.707 of max. Value of current transmitted
AVG.value=0.637 of max value of AC current transmitted
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / saket
rather than a technical basis for the values being multiple of 11 it is evolutionary basis.. the initial electrical equipments(bulb)were rated 100v.. and supply generated was 110 v to account for transmission drops. soon ac came and replaced the system with 110v ac generation which evolved with time to generate and transit at even higher multiples eventually coming down to 110 v.. so multiple of 11 continues.
| Is This Answer Correct ? | 1 Yes | 2 No |
Answer / jalapathi
in india standard generated voltage is 11kv. so what ever
be the ratio of transformer 1,2,3... it should be multiple
of 11.
| Is This Answer Correct ? | 4 Yes | 6 No |
Write the difference between OCB,VCB ?
What is meant by impedance? difference between high & low impedance ?
which phase is preferred for connecting 1 phase vt used for synchronizing OHL? WHY?
We have a 12MW power plant & we inject 5-6MW power to Orissa GRID. For this we have a 33KV/11KV switch yard having 12.5MVA power transformer. Some times we draw power during emergency. It is observed that during Export or Import for load less than 500Kw the power factor is decreasing to 0.3 . This is happening only during export or import. During island condition TG power factor OK.Our capacitor bank is provided with our Power plant auxilliary load. Please suggest how I can we improve our power factor during low load (GRID).
how can calculation ate Amps for cabel. Ex-for 1sqmm wire hou many amps we can draw
what is RNG in the DG synchronizing by PLC?
why generaters need four earthings
A cotter joint is generally used to transmit
How to know the following data of synchronous generator 1. D-Axis Unsaturated Reactance 2. D-Axis Unsaturated Transient Reactance 3. D-Axis Unsaturated Sub - Transient Reactance
why 6.6,11,22,33,66kv? what basis they have considered?
Which type of moter is used in trains, what is the ratting of supply used explain Working principal?
what are protective device needed to power a 360W ,50hz,240v,single phase,0.65 pf universal motor
-
Civil Engineering (5086) - Mechanical Engineering (4456)
- Electrical Engineering (16639)
- Electronics Communications (3918)
- Chemical Engineering (1095)
- Aeronautical Engineering (239)
- Bio Engineering (96)
- Metallurgy (361)
- Industrial Engineering (259)
- Instrumentation (3014)
- Automobile Engineering (332)
- Mechatronics Engineering (97)
- Marine Engineering (124)
- Power Plant Engineering (172)
- Textile Engineering (575)
- Production Engineering (25)
- Satellite Systems Engineering (106)
- Engineering AllOther (1379)
