1SCA022718R4520 ABB 32A 3-Pole Steel Enclosed Safety Switch

Why Choose the ABB OTL75T3U 32A Steel Enclosed Safety Switch?

The ABB OTL75T3U, order code 1SCA022718R4520, is a robust 32 A three-pole steel enclosed safety switch designed for dependable load breaking and local electrical isolation of industrial motors, machinery and electrical equipment. As part of ABB's Metal Enclosed (Loadbreak) product group, it combines ABB OTL switching technology with a durable IP65 steel-sheet enclosure for demanding industrial installations.

The OTL75T3U features a black pistol operating handle with I-O / ON-OFF indication, together with a hinged door, door lock and interlocked cover. The interlock prevents normal opening while the switch is ON and can be defeated for authorised procedures such as thermographic inspection. The unit also includes 1 NO auxiliary contact and a PE terminal.

This exact configuration has an authoritative 32 A product rating. The OTL75T3U is a three-pole device, while ABB specifies maximum AC-23A motor outputs of 22 kW at 230 V and 37 kW at 400 V, 500 V and 690 V. Its blank cable-entry arrangement allows cable-entry holes to be drilled to suit the installation.

Key Advantages

• Authoritative 32 A steel enclosed safety switch configuration.
• Three-pole switching suitable for three-phase industrial isolation.
• ABB specifies up to 37 kW AC-23A motor output at 400 V.
• IP65 steel-sheet enclosure provides protection for demanding industrial environments.
• Includes 1 NO auxiliary contact for signalling and associated control functions.
• Black pistol handle provides clear I-O / ON-OFF position indication.
• Interlocked hinged cover with defeatable interlocking supports controlled maintenance access.
• Blank cable-entry plates allow entry holes to be drilled to suit the installation.

Key Features

• ABB OTL enclosed safety switch range.
• 32 A authoritative product rating.
• Three-pole switching configuration.
• 22 kW maximum motor output at 230 V AC-23A.
• 37 kW maximum motor output at 400 V AC-23A.
• 37 kW maximum motor output at 500 V AC-23A.
• 37 kW maximum motor output at 690 V AC-23A.
• IP65 steel-sheet enclosure.
• Rigid alu-zinc coated steel construction with polyester powder coating.
• Black pistol operating handle.
• 1 NO auxiliary contact included.
• Provision for up to 2 NO + 2 NC auxiliary contacts.
• PE terminal included for protective earthing.
• Hinged door with door lock.
• Blank cable-entry plates for installation-specific drilling.

Flexible Three-Pole Isolation for Industrial Equipment

Steel enclosed safety switches such as the ABB OTL75T3U provide a clearly identifiable means of manually disconnecting electrical equipment from its power supply. Its three-pole switching arrangement is suitable for three-phase circuits, making the unit practical for local isolation of motors, production machinery and associated industrial electrical equipment.

The OTL75T3U combines ABB load-break switching technology with an IP65 steel enclosure, black pistol handle and interlocked hinged door. Its included auxiliary contact, PE terminal and blank cable-entry plates provide additional installation flexibility, allowing cable-entry positions to be prepared according to the requirements of the application.

Typical Applications

• Three-phase industrial motor isolation.
• Production and processing machinery.
• Conveyors and material handling systems.
• Pumps and pumping equipment.
• Fans and ventilation systems.
• Machine tools and manufacturing equipment.
• Custom installations requiring drilled cable-entry positions.
• Local maintenance and safety isolation points.