Why transmission line 11kV or 33kV 66kv not in 10kV 20kv?

Why transmission line 11kV or 33kV 66kv not in 10kV 20kv?

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.

How much power can flow in 11kV lines?

An 11 kV distribution circuit may carry 150 A in each of its three phases, thus transmitting a power of 3 MW. A 400 V final distribution circuit may carry 200 A in each of its three phases, thus transmitting a power of 150 kW.

What are disadvantages of corona effect?

Disadvantages: Ozone gas is produced due to the formation of corona, which chemically reacts with the conductor and causes corrosion. The energy dissipated in the system due to corona effect is called as Corona loss. The power loss due to corona is undesirable and uneconomical.

What is a 3333kv to 11kV transformer?

33kV to 11kV transformers steps down the the voltage to a safe level, which is then distributed via 11kV feeders to homes and businesses. Many people question why the voltage is as high as 33kV in the first place.

What is the difference between 33kV and 11kV power lines?

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 33KV pot insulators?

The 33kv pot insulator is almost 3times bigger in size than that of the 11kv pot insulators. The rated breakdown voltage of any selected insulator must be higher than the rated voltage of the line. For example, an 11kv pot insulator can have breakdown voltage as high as 24kv.

How many discs can I put on a 132kV line?

You can get up to 16 discs per phase for 132kv or 25discs per phase for 330kv line. Each disc has a breakdown value rated in kv. So, when they are strung together, the resultant insulation breakdown value becomes much higher. Disc insulators are either made of glass or porcelain. Either type is good and maybe selected without preference.