Transmission of Power: Polyphase System (Classic Reprint)
Tesla, Nikola Excerpt from Transmission of Power: Polyphase SystemThere are to-day thousands of waterfalls with millions of horse power of energy going to waste for lack of economical means of transporting such power to places of use.Each horse power of work for ten hours for each working day requires, through a steam engine, about six tons of coal per annum, so that the development and utilization of these inexhaustible sources of power will be equivalent ...