Why Choose the ABB OT400DLAA6B 400A 6-Pole IP54 Steel Enclosed Switch-Disconnector?
The ABB OT400DLAA6B (1SCA022559R7610) is a heavy-duty 400 A, 6-pole steel enclosed switch-disconnector designed for reliable manual switching and electrical isolation in industrial machinery, power distribution and high-current low-voltage installations. Part of ABB's OT enclosed switch range, it combines six mechanically operated switching poles, a durable steel enclosure and a highly practical black pistol-grip operating handle.
Rated at 400 A under AC-22A conditions at 500 V AC and 400 A under AC-23A conditions at 380–415 V AC, the OT400DLAA6B is designed for demanding electrical switching duties. Its six-pole configuration provides additional flexibility where more than three or four conductors must be switched together.
The switch is supplied in a sheet-steel enclosure with IP54 protection and open top and bottom cable-entry arrangements. Suitable cable-entry flanges and accessories are selected separately, allowing the installation to accommodate appropriately sized power cables and connection arrangements.
Featuring a black pistol-grip rotary handle with I–O / ON–OFF indication, the ABB OT400DLAA6B provides a clearly identifiable external operating point. Its robust enclosed construction makes it suitable for industrial electrical contractors, machine builders, maintenance engineers and power distribution specialists who require dependable manual isolation of high-current circuits.
Key Advantages
- 400 A enclosed switch-disconnector for industrial low-voltage switching and isolation.
- Six-pole switching configuration for simultaneous manual operation of six main conductors.
- 400 A AC-22A rating at 500 V AC for suitable mixed resistive and inductive loads.
- 400 A AC-23A rating at 380–415 V AC for appropriately rated motor and highly inductive switching duties.
- IP54 steel enclosure provides protection against limited dust ingress and splashing water when correctly completed and installed.
- Durable sheet-steel construction provides robust mechanical protection.
- Black pistol-grip operating handle enables practical manual ON/OFF switching.
- Six mechanically linked poles support coordinated disconnection of multiple conductors.
- Open top and bottom cable-entry sides allow flexible cable-entry configuration.
- Compatible with separately selected ABB cable-entry accessories for professional enclosure assembly.
- Suitable for high-current industrial distribution where the electrical design requires a six-pole isolator.
- Enclosed construction reduces the need to separately specify a switch mechanism and steel housing.
- Genuine ABB OT equipment with clear manufacturer identification and product traceability.
- Manual switching function provides a defined isolation point for properly designed maintenance procedures.
Key Features
- Manufacturer: ABB.
- Model: OT400DLAA6B.
- ABB order code: OT400DLAA6B.
- Manufacturer part number: 1SCA022559R7610.
- Product series: ABB OT.
- Product type: Steel enclosed switch-disconnector.
- Rated operational current: 400 A.
- Number of poles: 6.
- AC-22A operational current at 500 V AC: 400 A.
- AC-23A operational current at 380–415 V AC: 400 A.
- Rated operational voltage: Up to 1000 V, subject to the applicable switching ratings.
- Conventional enclosed thermal current: 320 A.
- Operating positions: I–O / ON–OFF.
- Handle type: Pistol grip.
- Handle colour: Black.
- Enclosure material: Steel.
- Enclosure protection: IP54.
- Cable-entry arrangement: Open top and bottom.
- Maximum listed cable cross-section: 300 mm², subject to the terminal arrangement.
- Enclosure dimensions: 800 × 800 × 230 mm.
- Net weight: Approximately 31 kg.
- EAN: 6417019179131.
Technical Specifications
- Manufacturer: ABB
- Brand: ABB
- Product family: OT Enclosed Switch-Disconnectors
- Model: OT400DLAA6B
- ABB order code: OT400DLAA6B
- Manufacturer part number: 1SCA022559R7610
- ABB product group: 311019 – Metal Enclosed (Loadbreak)
- Product description: 400A 6P Steel Enclosed Switch-Disconnector, Open Entries, IP54
- Product type: Enclosed switch-disconnector
- Switching function: Manual ON/OFF switching and isolation
- Number of main poles: 6
- Rated operational current AC-22A at 500 V AC: 400 A
- Rated operational current AC-23A at 380–415 V AC: 400 A
- Rated operational voltage: 1000 V
- Conventional thermal current, fully enclosed: 320 A
- Maximum listed conductor cross-section: 300 mm²
- Pollution degree: 3
- Power loss at rated operating conditions: 10 W per pole
- Enclosure material: Steel sheet
- Enclosure protection rating: IP54
- Operating handle: Black pistol grip
- Operating position indication: I–O / ON–OFF
- Operating method: Manual, front operated
- Cable-entry positions: Top and bottom
- Cable-entry configuration: Open entries
- Cable-entry accessories: Selected separately
- Enclosure width: 800 mm
- Enclosure height: 800 mm
- Enclosure depth: 230 mm
- Dimensions (W × H × D): 800 × 800 × 230 mm
- Net weight: 31 kg
- EAN: 6417019179131
- Automatic overload protection: Not provided
- Automatic short-circuit tripping: Not provided
- Changeover function: Not provided; ON/OFF switch-disconnector
Reliable Six-Pole Switching for High-Current Electrical Installations
The ABB OT400DLAA6B is designed for electrical installations where six main conductors need to be switched through a single manual operating mechanism. Unlike standard three-pole or four-pole enclosed isolators, its six-pole configuration provides additional switching capacity for specialised multi-conductor applications.
Six-pole switching can be useful in appropriately engineered installations involving multiple circuits or conductor groups that must be operated together. However, the exact wiring arrangement must be designed and verified by a competent electrical engineer. The presence of six poles does not automatically make the device suitable for parallel conductor connections, multiple independent supplies or any particular neutral-switching arrangement.
The switch provides a clearly defined ON/OFF operating function. Moving the external pistol-grip handle operates the internal switch-disconnector mechanism, allowing the connected conductors to be switched together.
The OT400DLAA6B is not a source-changeover switch. It does not provide the I–O–II positions associated with ABB's enclosed changeover products. Installations requiring manual selection between two incoming supplies should use an appropriately rated changeover device instead.
400A AC-22A and AC-23A Operational Ratings
ABB identifies the OT400DLAA6B with a 400 A AC-22A operational current rating at 500 V AC. The AC-22A utilisation category applies to switching mixed resistive and inductive loads under the conditions defined by the relevant switching standard.
The device also carries a 400 A AC-23A operational current rating at 380–415 V AC. AC-23A relates to switching motor loads or other highly inductive loads, making this rating particularly relevant for industrial electrical installations.
Although the switch has a stated rated operational voltage of 1000 V, this does not mean that the full 400 A AC-23A switching rating applies at every voltage up to that value. The applicable current rating must always be checked for the actual supply voltage and utilisation category.
The specified conventional enclosed thermal current of 320 A is a separate thermal characteristic and should not be confused with the 400 A rated operational switching current. Both values must be considered when evaluating the device for a particular installation.
Correct selection must also take account of the load profile, switching frequency, ambient conditions, conductor arrangements and protective device coordination.
Durable IP54 Steel Enclosure
The OT400DLAA6B is housed in a substantial sheet-steel enclosure intended for demanding industrial electrical installations. Steel construction provides a robust protective housing for the internal switch-disconnector mechanism and high-current conductor connections.
The enclosure is specified as IP54. This indicates protection against harmful dust ingress and splashing water from any direction when the complete assembly is correctly installed.
IP54 is not equivalent to IP65. The OT400DLAA6B should therefore not be described as fully dust-tight or suitable for direct water-jet exposure solely on the basis of its standard enclosure rating.
The enclosure measures 800 mm wide × 800 mm high × 230 mm deep. With a net weight of approximately 31 kg, the product requires suitable structural support and appropriate handling during installation.
Installation clearances should be planned to accommodate the enclosure dimensions, cable bending radii, operating handle access and any separately selected cable-entry accessories.
Open Top and Bottom Cable Entries
A key feature of the ABB OT400DLAA6B is its open cable-entry arrangement. The enclosure is supplied with open entry positions at the top and bottom rather than a fixed selection of pre-punched cable gland openings.
This arrangement provides flexibility when selecting cable-entry accessories for high-current conductors. Depending on the complete ABB enclosure system, compatible flange and entry components can be selected to suit the required cable routing and installation design.
Suitable cable-entry accessories must be obtained separately. The openings should not be left unfinished in an energised installation.
To achieve the required protection and mechanical integrity, the final cable-entry arrangement must be completed using components compatible with the enclosure and installed according to ABB's instructions.
The specified maximum conductor cross-section is 300 mm². Actual cable compatibility depends on the terminal arrangement, conductor type, cable lug requirements, bending space and the selected entry accessories.
Black Pistol-Grip Handle with ON/OFF Indication
The OT400DLAA6B includes a black pistol-grip operating handle with clear I–O and ON–OFF indication. This provides a visible external control point for manual electrical switching.
The handle allows an authorised operator to identify the switch position without routinely opening the steel enclosure. The six main switching poles are operated through the same mechanical switching mechanism.
For maintenance applications, the switch can form part of a controlled electrical isolation procedure when the installation is correctly designed and operated. Any specific padlocking, cover interlocking or auxiliary contact arrangements should be confirmed against the exact ABB product documentation and accessory configuration.
Before maintenance begins, personnel must follow the relevant safe isolation procedures, including appropriate locking arrangements where required and verification that the circuit is de-energised.
Switch-Disconnector Versus Circuit Breaker
The ABB OT400DLAA6B is a switch-disconnector, not an automatic circuit breaker.
Its purpose is to provide manual switching and isolation of appropriately rated electrical circuits. It does not independently detect an overload and trip automatically, nor does it provide automatic short-circuit interruption in the way a suitably rated protective circuit breaker does.
For a complete electrical installation, engineers must select suitable upstream or downstream protective devices and verify the required short-circuit withstand and coordination characteristics.
The 400 A switching rating should therefore not be interpreted as an automatic protective trip setting.
Typical Applications
- Industrial power distribution: Manual switching and isolation of appropriately rated high-current circuits.
- Six-conductor installations: Coordinated switching where six main poles are required by the electrical design.
- Manufacturing facilities: Enclosed electrical isolation for suitable production and processing equipment.
- Industrial machinery: Manual supply switching for appropriately rated equipment.
- Electrical plant rooms: High-current isolation in suitable low-voltage distribution systems.
- Industrial maintenance: Providing a defined ON/OFF switching point for controlled servicing procedures.
- OEM electrical equipment: Integration into engineered industrial power systems.
- Distribution equipment upgrades: Replacement of compatible enclosed switch-disconnectors.
- Specialised multi-pole switching: Applications requiring more than conventional three-pole or four-pole operation.
- Commercial and industrial infrastructure: Manual switching of suitable high-current electrical supplies.
- Industrial electrical contracting: Installation of enclosed load-break switching equipment.
- Panel-building projects: Integration of a complete steel enclosed switch-disconnector into suitable electrical distribution arrangements.
