12-pulse rectifier is extensively used in high power rectification. and the delta-connected autotransformer and wye-connected autotransformer are its two most popular phase-shift transformers. This paper compares the 12-pulse rectifiers using the two transformers via calculating the input line current. load voltage. http://www.diegojavierfares.com/best-price-Electro-Mech-LX174-Ten-Inning-Baseball-Scoreboards-special-buy/