# High Voltage Electrical Transmission

Electrical energy generated, generally produces a voltage of 10 kV. Before distributing electric power, a trafo or transformers in generating stations will raise the voltage to 66 kV, 132 kV, or even 400 kV. Electric power in Indonesia are distributed through the grid at this voltage level.

Before delivery to the customer, local transformer will reduce the voltage (gradually) to 220 V. The final phase of the voltage transformer will be 220 V for use by a group of users, can be performed by a transformer mounted on the poles.

The transformer plays a vital role in the process of distribution of power. Transformer can only work with AC power. This is one reason why the electricity supplied in the form of alternating current.

Power losses

The power loss that occurs during the transmission process can be calculated as follows. Suppose that the resistance power cord that connects the station to a house is 1 Ω. Suppose that a variety of electrical devices in that house, using a 6 kW power rating. Assume that the current is distributed with source voltage of 220 V.

First calculate the electric currents

I = P / V = 6 kW / 220 V = 6000 W / 220 V = 27.3 A

Then calculate the power loss that occurs on the cable

P = I

Percentage power loss of all power supplied to the house, becomes

745.29 W / 6000 W x 100% = 12%

Now, consider what happens when the voltage is raised to 132 kV.

At higher voltages, the magnitude of electric current is

I = P / V = 6 kW / 132 kV = 6000 W / 132000 V = 0.045 A

The power loss that occurs on the cable

P = I

Percentage power loss of all power supplied to the house, becomes

0.002 W / 6000 W x 100% = 0.00003%

The amount of power loss 132 kV transmission voltage is 0.00003% of the total power delivered to the house. So that we can ignore the losses that occur in a relatively short distance after the voltage is lowered to 220 V. This is the main reason

Before delivery to the customer, local transformer will reduce the voltage (gradually) to 220 V. The final phase of the voltage transformer will be 220 V for use by a group of users, can be performed by a transformer mounted on the poles.

The transformer plays a vital role in the process of distribution of power. Transformer can only work with AC power. This is one reason why the electricity supplied in the form of alternating current.

Power losses

The power loss that occurs during the transmission process can be calculated as follows. Suppose that the resistance power cord that connects the station to a house is 1 Ω. Suppose that a variety of electrical devices in that house, using a 6 kW power rating. Assume that the current is distributed with source voltage of 220 V.

First calculate the electric currents

I = P / V = 6 kW / 220 V = 6000 W / 220 V = 27.3 A

Then calculate the power loss that occurs on the cable

P = I

^{2}x R = (27.32 A)^{2}x 1 Ω = 745.29 WPercentage power loss of all power supplied to the house, becomes

745.29 W / 6000 W x 100% = 12%

Now, consider what happens when the voltage is raised to 132 kV.

At higher voltages, the magnitude of electric current is

I = P / V = 6 kW / 132 kV = 6000 W / 132000 V = 0.045 A

The power loss that occurs on the cable

P = I

^{2}x R = (0.045 A)^{2}x 1 Ω = 0.002 WPercentage power loss of all power supplied to the house, becomes

0.002 W / 6000 W x 100% = 0.00003%

The amount of power loss 132 kV transmission voltage is 0.00003% of the total power delivered to the house. So that we can ignore the losses that occur in a relatively short distance after the voltage is lowered to 220 V. This is the main reason

**why electric energy distributed at high voltage**.
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ReplyDeleteElectrical Wholesalers

A low voltage card's key detail is its contact potential or thermoelectric counterbalance voltage. Thermoelectric voltage is the voltage produced by warm contrasts at the intersection of different metals, for example, between the nickel-iron reed transfers and the copper conveyor to which they are associated. high voltage ceramic capacitor

ReplyDeleteIn an equal mix the possible contrast across every capacitor is something very similar and equivalent to the source voltage, V and every capacitor stores a charge. The all out put away charge, (QT) will be equivalent to the amount of the relative multitude of individual charges. MOSFET

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