ABB OT400DLRR4TZ 400A 4-Pole IP65 Steel Enclosed Safety Switch with Divided Top and Bottom Cable Entries
The ABB OT400DLRR4TZ is a heavy-duty 400 A, four-pole steel enclosed safety switch-disconnector designed for reliable electrical isolation in industrial and commercial low-voltage installations. Featuring a robust IP65-rated galvanised steel enclosure, a black padlockable operating handle and divided cable-entry arrangements at the top and bottom, this industrial isolator provides dependable switching for demanding electrical applications.
Identified by ABB manufacturer reference 1SCA022461R6050, the OT400DLRR4TZ belongs to ABB's established OT enclosed switch-disconnector family and is classified within the Metal Enclosed (Loadbreak) product group. Its four-pole switching configuration is particularly useful in three-phase electrical systems requiring simultaneous disconnection of three phase conductors and a fourth conductor, such as a switched neutral.
The switch offers a 400 A rated operational current and an AC-23A motor switching capacity of 220 kW at 415 V AC. Its enclosed construction, interlocked cover, auxiliary contacts and cable-entry facilities make it suitable for industrial machinery, electrical distribution systems, motor installations and maintenance isolation points.
The 800 × 400 × 230 mm steel enclosure is designed for industrial durability, with a protective coating and UV-resistant construction suitable for appropriately designed outdoor installations. Its divided top and bottom cable entries provide flexibility for routing power cables into the switching assembly.
Key Advantages
- 400 A current rating for heavy-duty industrial electrical switching and isolation.
- Four-pole (4P) switching for suitable three-phase and switched-neutral applications.
- 220 kW AC-23A motor switching capacity at 415 V AC.
- IP65 galvanised steel enclosure providing protection against dust and water jets.
- Divided cable entries at the top and bottom for practical cable installation.
- Four ring-flange entry positions per side for flexible cable routing.
- Black padlockable operating handle supporting controlled maintenance isolation.
- Interlocked enclosure cover to help prevent unauthorised access during operation.
- Defeatable cover interlock for authorised inspection and servicing.
- 2 normally open and 1 normally closed auxiliary contacts included.
- Auxiliary contacts wired to terminal blocks for convenient integration.
- Protective earth terminal included.
- UV-resistant steel enclosure with protective coating.
- Suitable for demanding industrial and commercial installations.
- ABB industrial switch-disconnector technology for reliable electrical isolation.
Key Features
- ABB OT enclosed safety switch-disconnector.
- OT400DLRR4TZ model designation.
- 400 A rated current.
- Four main switching poles.
- Manual ON/OFF switching operation.
- IP65 ingress protection.
- Galvanised steel enclosure with protective polyester coating.
- Grey enclosure finish.
- Black pistol-type operating handle.
- Handle padlockable with up to three padlocks.
- Cover interlocking mechanism.
- Defeatable interlock for authorised access.
- Divided cable-entry plates at the top and bottom.
- Four ring-flange cable-entry positions per side.
- Ring-flange covers supplied for the applicable entry arrangement.
- 2 NO + 1 NC auxiliary contacts included.
- Auxiliary contacts wired to terminal blocks.
- Protective earth terminal included.
- 800 × 400 × 230 mm enclosure dimensions.
- Suitable for fixed mounting in industrial electrical installations.
Technical Specifications
- Manufacturer: ABB
- Series: OT Enclosed Switch-Disconnectors
- Model: OT400DLRR4TZ
- ABB order code: OT400DLRR4TZ
- ABB manufacturer reference: 1SCA022461R6050
- Product group: 311019-Metal Enclosed (Loadbreak)
- Product type: Steel enclosed safety switch-disconnector
- Rated current: 400 A
- Rated operational current AC-23A at 415 V AC: 400 A
- Rated operational current AC-23A at 690 V AC: 400 A
- Rated operational voltage: Up to 1000 V AC
- Rated operational power AC-23A at 230 V AC: 110 kW
- Rated operational power AC-23A at 400–415 V AC: 220 kW
- Rated operational power AC-23A at 500 V AC: 280 kW
- Rated operational power AC-23A at 690 V AC: 355 kW
- Number of poles: 4
- Pole configuration: 4P
- Switching function: Manual loadbreak switching and isolation
- Operating positions: ON/OFF
- Handle type: Pistol-type handle
- Handle colour: Black
- Handle locking: Padlockable with up to three padlocks
- Enclosure material: Galvanised steel
- Enclosure finish: Protective polyester coating
- Enclosure colour: Grey
- Ingress protection: IP65
- UV resistance: Suitable for appropriately designed outdoor installations
- Cover interlocking: Interlocked with defeatable interlock
- Cable-entry arrangement: Divided top and bottom entries
- Cable-entry type: Ring-flange entries
- Ring-flange entry positions: 4 per side
- Ring-flange cover knockouts: 25.5 mm and 40.5 mm
- Factory-mounted auxiliary contacts: 2 NO + 1 NC
- Auxiliary contact connection: Wired to terminal blocks
- Protective earth terminal: Included
- Enclosure height: 800 mm
- Enclosure width: 400 mm
- Enclosure depth: 230 mm
- Dimensions (H × W × D): 800 × 400 × 230 mm
- Approximate weight: 29 kg
- Relevant product standard: IEC/EN 60947-3
Heavy-Duty 400A Four-Pole Electrical Isolation
The ABB OT400DLRR4TZ provides a dedicated switching and isolation point for high-current industrial electrical equipment. Its four-pole mechanism enables simultaneous switching of four conductors, making it suitable for appropriately designed three-phase installations where neutral switching is required.
With a 400 A rated current, the switch can be incorporated into industrial electrical distribution systems, machinery supplies and motor installations where its voltage-dependent switching ratings meet the application requirements.
Its AC-23A utilisation rating makes it suitable for switching motor loads and other highly inductive circuits within the manufacturer's specified limits. At 415 V AC, the maximum AC-23A motor power rating is 220 kW.
The manufacturer also specifies AC-23A motor power ratings of 110 kW at 230 V AC, 280 kW at 500 V AC and 355 kW at 690 V AC. These values help electrical designers assess the switch against the operating conditions of the connected equipment.
The switch-disconnector is intended for manual switching and isolation. It does not replace suitable overload or short-circuit protective devices, which must be selected according to the electrical installation and prospective fault conditions.
IP65 Steel Enclosure and Divided Cable-Entry Design
The OT400DLRR4TZ is supplied in a galvanised steel enclosure with a protective polyester coating. Its IP65 ingress protection rating provides dust-tight protection and resistance to water jets when the enclosure and cable entries are correctly installed and sealed.
The enclosure measures 800 mm high, 400 mm wide and 230 mm deep, providing a substantial industrial housing for the switch-disconnector and associated cable connections.
A key feature is the divided cable-entry arrangement at the top and bottom. The enclosure provides four ring-flange entry positions per side, allowing installers to configure suitable cable-entry arrangements for the installation.
Ring-flange covers with knockout openings are included in the relevant supplied arrangement. Suitable ring flanges, compression glands and other cable-entry accessories must be selected according to cable dimensions, environmental requirements and the manufacturer's installation instructions.
The enclosure's UV-resistant construction makes it suitable for consideration in outdoor applications, subject to correct mounting, environmental assessment and preservation of the required IP rating.
Padlockable Handle and Interlocked Cover
The black pistol-type operating handle provides clear manual ON/OFF operation. It can be secured using up to three padlocks, supporting controlled electrical isolation during maintenance and servicing.
The enclosure incorporates an interlocked cover, helping prevent normal access to internal switching components while the switch is in the ON position. A defeatable interlock is provided for authorised servicing and inspection, subject to safe working procedures.
The OT400DLRR4TZ includes 2 normally open and 1 normally closed auxiliary contacts, wired to terminal blocks. These contacts can be incorporated into compatible control, monitoring and indication circuits to provide switching-status information.
A protective earth terminal is also included to support correct earthing of the metal enclosure and associated installation components.
Typical Applications
- Industrial three-phase electrical isolation.
- High-current machinery supply switching.
- Three-phase distribution circuits requiring switched-neutral isolation.
- Industrial motor isolation within applicable AC-23A ratings.
- Manufacturing and processing facilities.
- Industrial pumping systems.
- Ventilation and extraction equipment.
- Conveyor and material handling installations.
- Commercial and industrial building services.
- Electrical distribution and sub-distribution systems.
- Outdoor electrical installations requiring IP65 protection.
- Industrial maintenance isolation points.
- OEM machinery and industrial equipment installations.
- Applications requiring a 400 A four-pole steel enclosed safety switch.
