# Frequent question: Why transmission line 11kv or 33kv 66kv not in 10kV 20kv?

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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 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 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.

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## Why does power stations generate 11 kV and not 220 kV?

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. To generate at 33KV, the size of the motor might be twice as large as the size of 11KV generator.

## Why the voltages are in 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*.

## What is 66KV line?

66 kV lines are not very common in the UK. They are often built using one of the 132 kV line designs, so the magnetic field is the same as for 132 kV. 132 kV overhead lines are usually carried on lattice steel pylons, but smaller than used for 275 kV and 400 kV lines. Sometimes they are carried on wood poles.

## 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.

## What is the difference between 11kV and 33kV transmission line?

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.

## Why is 11kV generated?

Generally, high voltages like 66kv or more than that are generated when the power is transmitted over larger distance. When the power is to be transmitted to shorter distances, power stations use 11kv. The specific reason for that is as the distance to be covered increases, so does the resistance of the wire.

## What is 66KV substation?

66KV Control & Relay Panel

It is intended to provide State-of-Art substation control, protection and metering system and shall be integrated with SCADA system. … The microprocessor based Transformer monitoring relay. All the relays/IED communications shall be on IEC 61850/Modbus protocol.

## 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 do we use 11kV in distribution system?

Normally a primary distribution line or feeder is designed to carry a load of 1-4 MVA depending on the feeder length, so the number of Feeders emanating from a secondary substation at 11 kV is 3 or more. The substation feeders should be able to ferry all electrical power from a source to the designated load areas.

## Why DC is not used in transmission?

DC(Direct Current) is not used over AC(Alternating Current) in transmission because DC goes heavy attenuation while transmission over long distance as we do not transform it from Low Voltage (at which it is being generated) to High voltage (for transmission over long distance(I will explain…)) by some direct mean …

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## What is transmission line voltage?

Transmission Line

Transmission lines carry high voltage electricity, typically at 345,000 volts, over long distances between the power generation plant and customers.

## What does kV mean in electricity?

Definition of kilovolt

: a unit of potential difference equal to 1000 volts.

## Which of the following is not a standard voltage for transmission of electrical power?

The standard voltages of transmission in India are 11 kV, 22 kV, 33 kV, 66 kV, 132 kV, 220 kV, 400 kV, 765 kV. Hence 222 kV is not a standard transmission voltage in India.