To gain the buck/Raise element, all of that is necessary is 2 separate switches so which the AC enter could be linked to one of many two Key faucets, although the load is connected to the opposite, Consequently using the major transformer's Main windings as an autotransformer. From Java 11 https://byd-atto-3-extended-range16158.blogdemls.com/33690020/uninterruptible-power-supply-cyberpower-an-overview