Why we need transformers...

251

03:25:58

The left circuit s ymbolizes a high-voltage cable without transformers. The right circuit symbolizes a normal high voltage line. With the transformers the energy loss is minimized and the electricity comes in the socket ... I hope this was understandable. Have a nice day ^^

published 8 years ago

LeButch

8 years ago

Really cool.

thebugger

8 years ago

Losses are generated by the current, not the voltage. Basically high tension power lines use higher voltages to carry the electricity at bigger distan, because the current is considerably small. Then transformers step down the voltage and increase the current at places where the cable run is shorter. You can estimate this with ohms law.

hurz

8 years ago

Buggzy, The root cause for high losses is resistance.

jpoulin0901

8 years ago

Makes sense.. but the line resistance is very exaggerated of course.

hurz

8 years ago

Yes, 2MOhm is quite a long cabel 😉

BillyT

8 years ago

The root cause for high losses is resistance, this is correct, but not to overlook how the power losses are minimized, to do this, the power is distributed at a higher voltage. This helps in two ways, higher voltages = lower current for the same wattage, thus lower IR losses, also because of the lower current, smaller conductors can be used, also saving on power conductor cost..

hurz

8 years ago

The costs for transformation (BTW plus its losses) are still lower then the costs for better conductors!

BillyT

8 years ago

This is correct.

zorgrian

8 years ago

Tesla demonstrated transmission of electric current at very high voltage with no wires

zorgrian

8 years ago

A laser can assist in ionising air enough to provide a line of sight conductor for super high voltage

WTFCircuit

8 years ago

Actually Tesla demonstrated that it is possible to transmit useful amount of energy through electromagnetic waves, the very high voltage produced was more a downside than an advantage. Infact it desperse a lot of the energy released through the sorrounding air and ground.

thebugger

8 years ago

Zorgrian has a point here. An ionized path is much more efficient carrier for electricity than free air EM propagation. Only problem is, I don't see a permanent ionized path at greater distances forming. You'll need a hell of a laser, and a continuous current flow to maintaining the conductive path. For shorter distances, the phenomenon is well known and is used daily, but larger runs might be impossible for our current technological state

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