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 Ladies (Put a Ring on It) Single Ladies (Put a Ring on It) "Single Ladies (Put a Ring on It)" is a song from Beyoncé's third studio album, "I Am... Sasha Fierce" (2008). Columbia Records released "Single Ladies" as a single on October 13, 2008 as a Double A-side alongside "If I Were a Boy", showcasing the contrast between Beyoncé and her aggressive onstage alter ego Sasha Fierce. It explores men's unwillingness to propose or commit. In the song, the female protagonist is in a club to celebrate her single status. "Single Ladies" won three Grammy Awards in 2010, including Song of the Year, among other