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 11KV 22kV 33kV 66kV?

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 is transmission voltage multiple 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*.

Why high voltages are used for transmission?

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.

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Is 34.5 kV a transmission?

34.5 kV – Secondary Roads

The lowest tier of the transmission system operates at 34,500 volts (34.5 kV). These lines carry power to smaller distribution substations that may serve part of a city, an entire town, or several rural towns.

Is 33kV a transmission voltage?

Many people question why the voltage is as high as 33kV in the first place. The reason is that the higher the transmission voltage, the lower the transmission losses will be. … 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 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.

How much current is in 11kV line?

Take a 11kV/415v, 500KVA distribution system. Then maximum current on HV side = 500/{sqrt(3) * 11} = 26.24 A. maximum current on LV side = 500/{sqrt(3) * 0.415} = 695.6 A.

Is 11kV RMS?

The voltage we receive in our home is a RMS value. The system voltages like 415V AC, 11kV AC, 36kV AC, etc are also RMS values.

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What is the transmission voltage?

Transmission voltages are defined as any line with voltage greater than 39,000 volts or 39 kV. The metric abbreviation kV for kilovolts is commonly used when talking about transmission line voltages. Commonly used transmission voltages are 69 kV and 138 kV.

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 …

What is the highest transmission voltage in India?

Transmission voltage in India (highest) is 765 kV AC and these lines are erected by Power Grid Corporation for interstate connections throughout India. DC transmission voltage (highest) in India is 800 kV .

Is 69kV high voltage?

Classification of transmission lines

Medium voltage (MV; distribution) – between 1000 volts (1 kV) and 69 kV, used for distribution in urban and rural areas. … Extra high voltage (EHV; transmission) – from 345 kV, up to about 800 kV, used for long distance, very high power transmission.

Is 230 kV high voltage?

In the United States, the American National Standards Institute (ANSI) establishes nominal voltage ratings for 60 Hz electric power systems over 100 V. Specifically, ANSI C84. 1-2020 defines high voltage as 115 kV to 230 kV, extra-high voltage as 345 kV to 765 kV, and ultra-high voltage as 1,100 kV.

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What is a 69 kV line?

Sub-transmission lines carry voltages reduced from the major transmission line system, typically 69kV, to regional distribution substations. Distribution lines are low voltage lines that bring electricity from substations to your home. These carry voltages of 12kV. The lines are smaller and cover shorter distances.