Mell Why transmission line voltages are 11kV 33kV 132 KV etc?
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. For example: Sending Voltage = 10kV x 10% = 11kV.
Why is the voltage so high for transmission lines?
Why High Voltage The primary reason that power is transmitted at high voltages is to increase efficiency. The higher the voltage, the lower the current. The lower the current, the lower the resistance losses in the conductors. And when resistance losses are low, energy losses are low also.
Which of the following is primary transmission voltage?
Primary distribution: The secondary transmission line terminates at the sub-station where voltage is reduced from 33 kV to 11kV, 3-phase, 3-wire….Solution:
| Power carrying system | Voltage level |
|---|---|
| Primary transmission | 66 kV, 132 kV, 220 kV or 400 kV |
| Secondary transmission | 33 kV |
| Primary distribution | 11 kV |
Why is electric power transmission multiple of 11 i.e 11kV?
1. Why the transformer and substation rating are mentioned in 33kV / 11kV , 11kV/440V and so on. In case of no load, there may be negligible voltage drop and we may get 110% (i.e. Sending + 10% extra which is 11kV) voltage at the receiving point. For this reason, transformer and substation should be rated at full 110% which is 11kV, 22kV and so on.
What happens when voltage is stepped down to 11 kV?
As voltage level gets stepped down from 132 kV to 11 kV or 33 kV, current level gets higher valued. But this high valued current distributed among various local distribution stations (distribution transformers) nearby. These distribution transformers again steps down the voltage to 415 V.
How are voltages maintained in power transmission lines?
Voltage in Power Electric Lines. This level of voltage is increased at different suitable levels, it may be at 400 kV or 765 kV or 1000 kV. This high voltage or extra high voltage level is maintained to transmit the power to a long distant substation. It is call primary transmission of power.
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.