Higher voltages allow for lower currents; electric power is measured in watts, which are calculated by volts multiplied by amps. The higher the voltage, the lower the amperage. This is important as a higher amperage requires a thicker cable; compare the cable on a car battery (12 volts at say, 50 amps, equalling 600 watts) to that on a vacuum cleaner (120 volts at 10 amps, or 1200 watts). The vacuum uses more power, but that power is transmitted through thinner wires, because the voltage is higher. It is the same with long-distance power transmission. Thinner wires are less expensive (they are made of aluminum braided over a steel cable for strength) and also weigh less, allowing the poles/pylons to be of lower strength. Also the losses would be reduced in high voltage transmission.
400KV
Transformers transform low vvoltages to hivh and vice versa. This is important in transmitting electrical power form the high voltage power plant to the low voltage home voltage. Using high voltage transmission reduces transmission power losses, I2R.
For a given amount of power, the higher the voltage the lower the current. This is necessary to minimise the voltage drop along the transmission line, and to reduce energy losses which are proportional to current squared. The advantage of transmiting electrical power at high(er) voltages is that you can use smaller conductors, since the current flow would be less for the same amount of watts. Watts = Volts times Amperes
For a given amount of power, the higher the voltage the lower the current. This is necessary to minimise the voltage drop along the transmission line, and to reduce energy losses which are proportional to current squared. The advantage of transmiting electrical power at high(er) voltages is that you can use smaller conductors, since the current flow would be less for the same amount of watts. Watts = Volts times Amperes
electrical power from the power plant to consumer goes through the transmission & distribution system, first we transmit the high voltage power from the power plant to sub station in sub station we step down the voltage according to need & distribute it to the demand.
Electrical engineering is low voltage, logic circuits, communications etc. Power engineering is electrical transmission and the like.You want EE.
Changes in load causes the load current to change, resulting in changes in voltage drop along conductors. This means that the 'receiving end' voltage will vary.
it is basically the transportation of electrical power from the power generation plant (eskom) via step up voltage transformers to the substation (step down transformers. to the distribution of the consumers.
Because it's cheaper for the power companies to distribute power through the electrical grid at high voltage. Between generation and arrival at a house, it's gradually 'stepped down' through the use of transformers from 25,000 volts to the standard 230 volts used in houses.
Power consumed by an electrical appliance will increase with a reduction of applied voltage.
Transmission power cables are designed by current carrying capacity.
Transmitting 12 volts of power.