OT1250E12 ABB 1250 A 3-Pole Switch-Disconnector

Why Choose the ABB 1SCA101552R1001 OT1250E12 Switch-Disconnector?

The ABB 1SCA101552R1001, order code OT1250E12, is a heavy-duty 1250 A, 3-pole switch-disconnector designed for dependable high-current switching and electrical isolation in industrial power distribution systems. As part of the ABB 311027-OT Switches product group, it belongs to ABB's OT range of manually operated switch-disconnectors for switchboards, machinery and power distribution equipment.

The OT1250E12 is a front-operated, base-mounted 3-pole switch-disconnector with its operating mechanism positioned between the poles. This specific mechanical model is supplied without an operating handle or shaft, allowing the appropriate ABB operating accessories to be selected separately according to enclosure depth and installation requirements. A terminal bolt kit is included.

With a conventional free-air thermal current of 1250 A and rated operational currents of 1250 A for AC-21A, AC-22A and AC-23A duties at 380–415 V, the OT1250E12 is engineered for demanding industrial loads. It also provides a 50 kA short-time withstand current for 1 s, 110 kA short-circuit making capacity at 690 V and a maximum main-circuit operational voltage of 1000 V.

Key Advantages

• Heavy-duty 1250 A switch-disconnector for high-current industrial applications.
• 3-pole configuration for three-phase switching and electrical isolation.
• 1250 A AC-23A rating at 380–415 V for demanding load-switching duties.
• 50 kA short-time withstand current for 1 s.
• Mechanism positioned between the poles for the OT1250E12 mechanical arrangement.
• Supplied without handle and shaft, allowing operating accessories to be selected for the specific installation.

Key Features

• ABB OT1250 switch-disconnector series.
• 1250 A rated current.
• 3-pole switching configuration.
• 1250 A AC-21A at 380–415 V.
• 1250 A AC-22A at 380–415 V.
• 1250 A AC-23A at 380–415 V.
• 710 kW AC-23A operational power at 400–415 V.
• 900 kW AC-23A operational power at 500 V.
• 1200 kW AC-23A operational power at 690 V.
• 1000 V rated operational and insulation voltage.
• 12 kV rated impulse withstand voltage.
• 50 kA Icw for 1 s.
• 110 kA Icm at 690 V.
• Front-operated, base-mounted construction.
• Operating mechanism positioned between the poles.
• Handle and shaft are not included.
• Terminal bolt kit included.

Mechanism 12 High-Current Isolation

Switch-disconnectors provide a dedicated means of manually switching and isolating electrical circuits from their power source. The ABB OT1250E12 combines a substantial 1250 A current capacity with three-pole switching and a mechanism positioned between the poles, providing a compact mechanical arrangement for high-current three-phase distribution systems.

Because the OT1250E12 is supplied without a handle and shaft, panel builders can select compatible ABB operating accessories according to the switchboard design and required operating depth. Its 50 kA Icw for 1 s, 110 kA Icm at 690 V and strong AC-23A performance make it suitable for demanding industrial switching and isolation duties.

Typical Applications

• High-current industrial power distribution.
• Main and sub-main electrical isolation.
• Industrial switchboards and distribution assemblies.
• Large machinery and production equipment.
• High-power motor and load switching.
• Manufacturing and process installations.
• Power generation and infrastructure systems.