The ABB OT Series is a three-pole screw-mount switch disconnector rated for 400A at 355kW, designed for industrial power distribution and motor control in harsh environments (IP65-rated enclosures). Typically installed in electrical cabinets, motor starters, and distribution boards requiring manual isolation capability. Critical verification: confirm voltage rating (230V, 400V, 690V) matches your system specification, as this detail is essential for safe application.