The National grid Flashcards
1
Q
What are the 4 parts to the national grid in order?
A
1) Power stations
2) Step up transformer
3) Pylons
4) Step down transformer
Then sent to homes
2
Q
What is the point in a step up transformer?
A
Increases the voltage from about 11000-132000v but decreases the current
3
Q
What does a step down transformer do?
A
It decreases the voltage from 132000 to 11000
4
Q
What is the advantage for under ground cables?
A
They are hidden
5
Q
What are the disadvantages for under ground cables?
A
Expensive to lay and expensive to repair
6
Q
What are the disadvantages for overhead cabling name 2?
A
1) Spoil the landscape
2) Health issues
