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What are the components of the power transmission system?
A power plant with a generator, a step-up transformer and transmission lines.
What are the components of the power distribution system?
A substation with a distribution bus and circuit breakers and also a step-down transformer, final transfrmer station.
Where is electrical energy generated?
At a power plant.
What does an electrical cable consist of?
It consists of a conductor and insulation
What are the advantages of overhead cables?
They can carry higher voltages over longer distances, are cheaper to construct and maintain, heat dissipates easier,
What are the advantages of underground cables?
not affected by weather coonditions, safe for people, do not spoil the landscape, do not produce corona effect, lower drop in voltage over the same distance
