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
A (Big Bang single) A (Big Bang single) "A" is the fifth single album by South Korean band Big Bang, and the second from their "MADE Series". The single could be pre-ordered from May 27 to June 1, consisting of 4 tracks (two new songs and two previous ones) and two instrumental tracks. It was released worldwide through iTunes, and other online music portals on June 1. There are two different versions of the album, one contains only a CD and a booklet (24p) while the other one contains a CD, a booklet (24p) and a special kit (a random puzzle ticket, 5 photo