To gain the buck/Increase characteristic, all of that is necessary is 2 different switches so that the AC enter can be linked to one of several two Most important taps, whilst the load is connected to the opposite, Therefore using the most important transformer's Most important windings as an autotransformer. https://pantip94443.blogsvirals.com/32974764/5-simple-statements-about-uninterruptible-power-supply-definition-explained