6110-00-557-8309 (R680126-1)
NSN 6110-00-557-8309 (NIIN 00-557-8309) is a power transfer switching unit in Federal Supply Class 6110, Electrical Control Equipment — an item that is electrically operated to transfer automatically the load from one power source to an alternate power source. Manufacturer part number R680126-1 (Raytheon Company, CAGE 06845); also referenced as D9986 (William Spencer).
Key specs: manual operation; AC current type; 60 hertz nominal frequency; full characteristics table below. NIIN assigned January 1963; DEMIL A (none required); unit of issue EA (each); export Schedule B 8543.90.9000.