The ABB OTM40F4C12T380C is a 4‑pole automatic transfer switch (ATS) / motorized change‑over switch designed to automatically transfer electrical loads between two independent three‑phase AC power sources — for example, between the utility mains and a backup generator — with minimal interruption. It is part of ABB’s Compact Automatic Transfer Switches (OTM_C_D) family, which provides reliable and safe switching for critical power continuity applications in industrial and commercial electrical distribution systems. These switches offer both automatic (motorized) operation and manual operation via a direct handle in emergencies.
