The national grid Flashcards
- What happens at the furnace?
The furnace is where fossil fuels are burnt to heat water
- What happens at the turbine?
The high pressure steam is forced through a turbine making it turn
- What happens at the generator?
Turns to generate electricity at around 25,000V
- What happens at a step up transformer?
The voltage is raised up to 400,000V but the current is kept to low to avoid heat loss
- What happens in the national grid network?
Electricity is transported across the country via a series of cable and transformers
- What happens at a step down transformer?
Voltage is decreased to 33,000V
- What happens at a local transformer substation?
Voltage is stepped down to 230V to use in homes
- What happens at buildings and houses?
Electricity comes into the building through the meter to all plug sockets
What is the order for the national grid?
- Furnace
- Turbine
- Generator
- Step up transformer
- National grid network
- Step down transformer
- Local transformer substation
- Houses and buildings
What does direct current do?
Direct current flows in ONE DIRECTION
What does alternating current do?
Alternating current repeatedly reverses direction
What does frequency mean?
What is AC frequency?
- Frequency is how many times a current changes direction per second
- AC frequency is 50 hertz (it changes direction 50 times per second)
What is the average voltage in the mains in the UK?
230 volts
What is the maximum and minimum voltage in the alternating current?
+325 and -325
What does P stand for?
Power (W)
