How is electricity transmitted from a power supply to the respected household?

Answer 1

electricity transmitted from a power supply to the respected consumers by means of Transformers dat we used in several places. by means of step down transfomers used in several areas that stepped down the voltage to its required one from the transmission area...eg: first of alla electricity/current is coming from the generating stations and its remodified in further transmission stations commonly known as substations.there are several kv s/s situated here...220 kv ,110 kv,66 kv,33 kv are commonly one.....in every s/s generating current is reduced to 220 kv .or 110 kv, or either to the respective ones by means of transformers..from this out gonig feeers are connected and respective 11 kv lines we get from this transmission area by means of respective kv/11kv transformers....and after that we use small step down transformers for consumer use..

The Multiple Earth Neutral System is used to transmit power in most countries.

When power is generated at the power station it is AC, three phases (red, blue, yellow) are produced. Each phase is 120 degrees out from the other.

A copper or aluminum wire is used to carry the electricity for each phase.

A wire for the neutral, or return path often also leave the power station.

The wires go to a nearby substation, which uses a large step-up transformer, to bring the voltage up to 220 kV, 110 kV, 66 kV or 33 kV.

A large transformer is used for each phase (three transformers)

At the substation the neutral is earthed. This is done by placing a long solid metal spike deep into the ground.

While rock and soil (earth) is not particularly good as a conductor of electricity, the effectiveness of a conductor increases with its cross-sectional area.

The planet earth has a huge cross-sectional area.

From the substation the power is transmitted by wires to wherever it is needed in the country. (One wire for each of the three phases, red, blue, yellow.)

The ground, or earth is used for the return wire.

Hi voltage is used, as this reduces the amount of power lost in the transmission wires.

Power loss is based on current, not voltage.

Once the wires reach the town or suburb where the power is needed, another substation uses three transformers to drop the voltage down to 110 V or 230 V.

Again this substation has a large metal spike in the ground to use the earth as a return wire.

From the local substation a wire is sent out to each house in the neighbourhood.

Each house gets one of the three phases. (and only one wire goes to it.)

Many factories and businesses need more power, they often get all three phases.

Throughout this system, the Earth (ground) is used as a return wire, to save the expense of additional wiring.

Because of this, touching a phase wire, while standing on the earth (or anything touching the earth) can give you a serious electric shock.

(This answer is a very simplified description of a very complicated network)