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-wing formation all levels of modern football. They include pulling guards, double teams, play action passes, laterals, wedge blocking, trap blocking, the sweep, the reverse and the quick kick. Many current offenses, such as the spread option, use single-wing tendencies for running plays, while using wide receivers instead of wingbacks. Once a strong running formation, the single wing has been replaced by formations that facilitate passing, while minimizing the running aspect of the game. Today the single-wing has evolved into what coaches call the spread offense or shotgun, with the emphasis on passing. The most noticeable feature that remains of the powerful