Automatic Transfer Switch, Dual Power Auto Transfer, Transfer Switch Dual Power Automatic Transfer SwitchShunhengxin® offers a broad range of transfer switch products that are positioned to support virtually any type ... of switches. The SHX-A series is designed for residential and light commercial applications. The SHX-B series for ... 1, 3R, 4, 4X, and 12 enclosures 40-3200a Automatic Transfer Switch