The ABB OTM200E4CM230C is a motorized change‑over and transfer switch designed for automatic or remote switching of electrical loads between two independent AC power sources (such as utility mains and a backup generator) in three‑phase electrical distribution systems. It supports automatic operation when combined with control logic (e.g., ABB automatic transfer controllers) and also manual operation via an attached handle. This type of switch provides safe load transfer with mechanical interlocking to prevent simultaneous connection of both sources, making it suitable for industrial and commercial applications requiring reliable power continuity. OTM series switches are compliant with international IEC/EN standards for transfer and change‑over functionality
