Large generators (coal, gas, hydro) produce power at around 8-20kV. The reason for this is:

Question

Large generators (coal, gas, hydro) produce power at around 8-20kV.  The reason for this is:

Accepted Answer

it is proportional to their size - they would need to be bigger to produce higher voltages

Answer

they spin at between 8 and 20 rpm (revolutions per minute)

Answer

this is the optimal voltage for transmitting over long distances

Answer

their typical capacity is 8-20kW

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