Why is 11kV 22kV 33kV 66kV 132kV in India?

This is all the electrical engineer must know, why in India 11kV, 22kV, 33kV, 66kV, 132kV like that we have different level of voltages. Normally people say it is due to the sinusoidal form factor, the form factor is equal to 1.11, but thats wrong let see….

Why all voltage levels are the multiples of 11kV?

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*.

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 transmission is 11kV or 33kv 66KV?

What is 11kV cable?

6.35/11kV Cables Their aluminium wire armour (AWA) for single core cables and steel wire armour (SWA) for multicore cables provide robust mechanical protection making these 11kV cables suitable for direct burial in the ground.

Which of the following voltages are multiple of 11kV in India?

In India we have AC transmission voltages of 11kv, 33kv, 66kv, 110kv, 220kv, 400kv and 765kv. Of this 400kv and 765kv are not multiple of 11kv. But 11kv, 33kv, 66kv and 110kv are multiple of 11.

Why do we use 11kV instead of 33kV in power generation?

But 11kv, 33kv, 66kv and 110kv are multiple of 11. Reason is to simplify the engineering design. You should know that, designers/engineers thought 11kv is best suited for designing a generater for size of conductor and insulation. Hence, all generation was at 11kv.

Why is the voltage generated at 11 kV?

The voltage is generated at 11 KV because it requires less insulation in comparison to the generation of voltage at above 11 KV. The high voltage rotating machine may not be so reliable as compared to the low voltage rotating machine.

Is 400kV and 765kv multiple of 11kV?

Of this 400kv and 765kv are not multiple of 11kv. But 11kv, 33kv, 66kv and 110kv are multiple of 11. Reason is to simplify the engineering design. You should know that, designers/engineers thought 11kv is best suited for designing a generater for size of conductor and insulation.

https://www.youtube.com/watch?v=K_OMDI1im5c