Description

ABB OT1200U03 3-Pole 1200A Non-Fused Load Break Disconnect Switch

Technical Specifications

• Product Model: OT1200U03
• Brand: ABB
• Warranty: One Year
• Input Voltage: Max 600V AC (UL/CSA rated), 1000V AC IEC rated
• Operating Temperature: -40°C to +40°C
• Storage Temperature: -45°C to +85°C
• Response Time: Instant mechanical break contact isolation
• Protection Class: Front side IP00, internal live parts insulated
• Accuracy Class: Complete visible double-break isolation for lockout/tagout safety
• Output Frequency: 50/60Hz industrial AC power circuit switching
• Rated Current Range: 1200A continuous rated, 1250A maximum overload short-time current
• Communication Interface: Pure mechanical power switching, no electronic communication port
• Supported Protocols: N/A (low-voltage power isolation component)
• Overload Capacity: Compliant with IEC 60947-3 short-circuit withstand, bolted lug terminals with 56.5N·m tightening torque
• Dimensions: 372mm (H) × 335mm (W) × 127mm (D)
• OEM Part Code: 1SCA022860R6820

Product Overview

The OT1200U03 is a heavy-duty 3-pole non-fusible main disconnect isolator from ABB OT series, designed for full electrical isolation of high-current AC power distribution circuits in industrial control cabinets, variable frequency drive systems and low-voltage power panels. This base-mounted isolator only includes the main switch body and terminal bolt kits; operating handle and extension shaft need to be purchased as separate accessories. It adopts a visible double-break contact structure to create a clear isolation gap when switched OFF, fully meeting LOTO (Lockout-Tagout) safety requirements for equipment maintenance and overhaul.

Widely matched with ABB ACS880 series high-power inverters as the upstream main power isolation switch, it effectively cuts off the total input power of the drive unit to prevent accidental energization during module replacement, wiring inspection and fault repair. The thick copper busbar connection design reduces heat generation under 1200A full-load continuous operation, with total power loss controlled at only 29W under rated working conditions. Electrical panel designers, power system maintenance technicians and VFD service engineers benefit from its UL98, CSA C22.2 and IEC 60947-3 global certifications, robust mechanical lifespan of 6000 switching cycles, and standard panel base mounting structure for seamless integration into large power distribution enclosures.