Single-phase generator The early generators for those single-phase traction networks are single-phase generators. Even with newer three-phase motors which were introduced to some modern trains, the single-phases transmission for traction networks survive their time and are still in use in many railways today. However, many traction power stations have replaced their generators over time to use three-phase generators and convert into single-phase for transmission. In the early development of hydroelectricity, single-phase generators played an important role in demonstrating the benefits of alternating current. In 1891, a 3,000 volts and 133 Hz single-phase generator of 100 horsepower was installed at Ames Hydroelectric Generating
Single combat single combat could also take place within a larger battle. Both ancient and medieval warfare did not always rely on the line or phalanx formation. The "Iliad" notably describes the battles of the Trojan war as a series of single encounters on the field, and the medieval code of chivalry, partly inspired by this, encouraged the single combat between individual knights on the battlefield, in which the loser was not usually killed but taken captive for ransom. This tradition ended in the 14th century due to the use of the longbow and the pike square against mounted knights (Battle of