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  #1  
Old August 26th, 2015, 10:31 AM
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Default National Power Grid PPT

Hello sir would you please provide me PPT of National Power Grid??? This PPT title is To know why we need the National Grid.
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  #2  
Old August 26th, 2015, 12:31 PM
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Join Date: Jun 2013
Default Re: National Power Grid PPT

Hello friend, here I am attaching Zip file of PPT of National Power Grid that title is To know why we need the National Grid…….

(PPT of National Power Grid that title is To know why we need the National Grid)


Here I am putting some content out side from the file……..

1. The National Grid
  • Lesson Objectives:
    To know why we need the National Grid

    To know how electricity is transferred via the National Grid

    KEYWORDS: NATIONAL GRID, TRANSFORMER, VOLTAGE

    2. How Does Electricity Reach Us?

    Electricity reaches out homes by the National Grid.

    The national grid is a network of cables which connect power stations to our homes and other buildings.

    The network also contains TRANSFORMERS .

    Two types of transformer are used; step-up transformers and step-down transformers.

    3. How Does Electricity Reach Us? Power is generated at power stations at around 25kV. It passes to a step-up transformer where it is transformed to 132kV. The electricity is transferred via thick, insulated cables, (aluminium covered with a ceramic insulator) held up by pylons to electricity sub-stations which are step-down transformers. At the sub-station, the 132kV voltage is transformed again to the 240V which we use in our homes. From the sub-station, the electricity travels via underground cables rather than overhead cables. 04/04/10

    4. Why Do We Use Transformers?
    Why is electricity not transferred through the national grid at the 240V we use in our homes? Efficiency! Less energy is lost when transferring electricity at high voltages. In fact, by making the grid voltage 132kV or higher, the energy losses are reduced to almost zero! How is the energy lost at low-voltages? Why do we need to convert the voltage down to 240V?
Attached Files Available for Download
File Type: zip PPT of National Power Grid that title is To know why we need the National Grid.zip (580.1 KB, 22 views)
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