Ronk offers quality manual transfer switches, phase converters, and disconnect switches. Ronk manual transfer switches are a fast, dependable, safe way to transfer 100-1200A single loads between commercial power and auxiliary power sources for your entire home or business. Ronk static and rotary phase converters are ideal for converting single phase to three phase for a wide variety of applications. Ronk manual disconnect switches are available at 240VAC in single phase models of 100-400A and three phase models of 200-400A.