Table of Contents
Why do we generate 11kV?
It is cheaper to generate at a relative lower voltage and then step it up for transmission. Hence, most power generating plants are designed to operate at 11KV. Therefore in order to compensate for this, the primary generation voltage would be; the required nominal voltage + transmission losses.
Why transmission is 11kV or 33kV 66kV?
But we already know that there are some voltage drop due to the resistance of the transmission lines. For this reason, they transmit 10% extra voltage. Sending Voltage = 10kV x 10% = 11kV. While the receiving end voltage are 10kV due to voltage drop.
Why all voltage levels are multiples of 11?
Answer: 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 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*.
Which type of cable is used for 11kV?
The cable is suitable for rated voltage 6/11kV according to IEC 60502-2….Technical Specification.
| Cable type | Cu/XLPE/SC/SWA/PVC | |
|---|---|---|
| According to regulation | BS 6622 | |
| Rated voltage (U) | (kV) | 11kV |
| Voltage to neutral (Uo) | (kV) | 6.35kV |
| Material of conductor | Copper |
What is the difference between 11kV and 33kV?
The 11kV lines are used in residential areas and is what feeds the local transformers, which then distributes power to the buildings in the area. 33kV lines on the other hand involve much higher voltages and are used to distribute power from one small sub-station to another.
What is the difference between 11kV and 22kV?
RE: 11kV vs 22kV distribution voltage …22kV can carry twice the load of 22kV. For two reasons for choosing 11kV over 22kV, one is that protection systems would be cheaper and smaller. The other is power correction of an 11kV system would require smaller devices as well.
Why 11kV 22kV 33kV 66kv?
Due to the form factor=1.11, so output voltage must be multiply of form factor, so we get 11,22,33. In case of a sinusoidal wave, the form factor is approximately 1.11. The reason is something historical.
Is 11kV medium voltage?
11kV Cables | Single core Medium Voltage. Complete range of Cold Shrink cable accessories from stock are available for the jointing and terminating of 11kV cables into electrical equipment including switchgear, transformers and overhead lines.
Why are there different voltages in India 11kV and 33KV?
Why in India 11kV, 22kV, 33kV, 66kV, 132kV …. This is all the electrical engineer must know, why in India 11kV, 22kV, 33kV, 66kV, 132kV like that we have different level of voltages.
Why are electric power cords multiple of 11kV?
For this reason, they transmit 10% extra voltage. For example: Sending Voltage = 10kV x 10% = 11kV. While the receiving end voltage are 10kV due to voltage drop. More examples are given in below table. Related Post: What are the Tiny Cylinder in Power Cords & Cable?
Why is 60kV multiple of 11 i.e 11kV?
60kV x 1.11 = 66.6kV The above calculation clearly shows that the results are different then the general values i.e. in case of 132kV, with the from factor multiplication, it is 133.2kV. In addition, We use 230V instead of 220V (Single Phase) and 400V instead of 440V (Three Phase).
Which is higher 11 kV or 13.8 kV?
E.g. 3000v + 300v = 3.3kVetc. and hence the off load generated voltages became 3, 6, 11 + 10%. 11 kV (50 Hz) is the dominant generator voltage in Europe, while 13.8 kV (60 Hz) is the dominant generator voltage in America.