Why Choose the ABB OT400DLUU4C 400 A 4-Pole Enclosed Changeover Switch?
The ABB OT400DLUU4C is a 400 A, 4-pole steel enclosed manual changeover switch designed for switching between two electrical supply sources in industrial and commercial low-voltage distribution systems. Part of the ABB OT enclosed switch-disconnector range, it provides a practical solution for applications requiring controlled power source selection, manual load switching and electrical isolation.
Featuring a 400 A AC-22A and AC-23A rating at 415 V AC, the OT400DLUU4C combines a robust galvanised steel enclosure with a black I-0-II operating handle. Its IP54 protection rating and four-pole configuration make it suitable for appropriately designed electrical installations where reliable manual changeover between normal and alternative power supplies is required.
The enclosure incorporates blank cable entry provisions, neutral and protective earth terminals, a padlockable operating handle and an interlocked cover. Identified by ABB manufacturer product ID 1SCA022474R8120 and order code OT400DLUU4C, the unit measures 800 × 400 × 330 mm and provides a durable enclosed switching solution for industrial power distribution.
Key Advantages
- 400 A rated current for compatible industrial and commercial power distribution applications.
- 4-pole changeover configuration supports coordinated switching between two electrical supply sources.
- I-0-II operating arrangement provides two supply selection positions and a central OFF position.
- 400 A AC-22A rating at 415 V AC for compatible mixed-load switching.
- 400 A AC-23A rating at 415 V AC for appropriately rated motor and inductive-load switching.
- IP54-rated steel enclosure provides protection against limited dust ingress and splashing water.
- Galvanised steel construction with protective polyester coating.
- Black padlockable operating handle supports controlled isolation during maintenance.
- Interlocked enclosure cover helps control access to internal switching components.
- Defeatable cover interlock supports authorised inspection procedures.
- Blank cable entry provisions allow cable entry arrangements to be configured for the installation.
- Neutral and protective earth terminals support electrical installation.
- Auxiliary contact expansion capability supports compatible status indication and control circuits.
- Suitable for manual mains-to-generator and alternative power source changeover applications.
Key Features
- ABB OT400DLUU4C enclosed changeover switch.
- 400 A rated operational current.
- 4-pole switching configuration.
- Manual I-0-II changeover operation.
- 400 A AC-22A at 415 V AC.
- 400 A AC-23A at 415 V AC.
- IP54 enclosure protection rating.
- Galvanised steel enclosure with polyester coating.
- Black manual operating handle.
- Padlockable handle accommodating up to three padlocks.
- Interlocked enclosure cover with defeatable interlock function.
- Blank cable entry arrangement.
- Neutral and protective earth terminals included.
- No auxiliary contacts fitted as standard.
- Maximum auxiliary contact configuration: 4 NO + 4 NC.
- 800 × 400 × 330 mm enclosure dimensions.
- 36 kg catalogue weight.
- Designed for manual electrical source selection and isolation.
Technical Specifications
- Manufacturer: ABB
- Series: OT Enclosed Changeover Switches
- Model: OT400DLUU4C
- ABB order code: OT400DLUU4C
- ABB manufacturer product ID: 1SCA022474R8120
- Product group: 311019 – Metal Enclosed (Loadbreak)
- Product type: Steel enclosed manual changeover switch-disconnector
- Rated current: 400 A
- Number of poles: 4
- Switching arrangement: Four-pole changeover
- Operating positions: I-0-II
- Operating method: Manual
- Rated operational current AC-22A at 415 V AC: 400 A
- Rated operational current AC-23A at 415 V AC: 400 A
- Rated operational voltage: Up to 1000 V
- Enclosure protection rating: IP54
- Enclosure material: Galvanised steel
- Enclosure coating: Protective polyester coating
- Operating handle colour: Black
- Handle locking: Padlockable
- Maximum handle padlocks: 3
- Enclosure cover: Interlocked
- Interlock override: Defeatable interlock function
- Cable entry arrangement: Blank / Blank
- Neutral terminal: Included
- Protective earth terminal: Included
- Auxiliary contacts included: None
- Maximum auxiliary contacts: 4 NO + 4 NC
- Enclosure height: 800 mm
- Enclosure width: 400 mm
- Enclosure depth: 330 mm
- Dimensions (H × W × D): 800 × 400 × 330 mm
- Catalogue weight: 36 kg
- Primary function: Manual electrical source changeover and isolation
Manual Power Source Changeover for Industrial Electrical Distribution
The ABB OT400DLUU4C provides a manually operated means of transferring compatible electrical loads between two supply sources. Its I-0-II switching arrangement allows an operator to select source I, disconnect both sources in the central OFF position or select source II.
This arrangement is particularly relevant to installations incorporating a normal mains supply and an alternative power source, such as a standby generator. The four-pole configuration supports electrical systems requiring coordinated changeover of four conductors, subject to the installation's neutral switching, earthing and electrical distribution requirements.
With 400 A AC-22A and AC-23A ratings at 415 V AC, the OT400DLUU4C is suitable for appropriately rated industrial distribution loads. Final selection must consider operating voltage, load current, switching duty, prospective short-circuit current and the requirements of the complete electrical installation.
The galvanised steel enclosure incorporates a protective polyester coating and an IP54 protection rating. Its black padlockable operating handle supports controlled switching and maintenance isolation, while the interlocked cover helps manage access to internal components.
The blank cable entry arrangement allows suitable cable entry plates and associated components to be selected for the installation. Cable entry components must be installed correctly to maintain the required enclosure protection. Compatible auxiliary contacts may also be fitted where switching status indication or electrical interlocking is required.
The OT400DLUU4C is a manual changeover switch, not an automatic transfer switch. Automatic supply monitoring, generator starting and automatic transfer functionality require additional appropriately designed equipment.
Typical Applications
- Manual mains-to-generator changeover installations.
- Industrial electrical supply source selection.
- Commercial building power distribution systems.
- Manufacturing and production facilities.
- Industrial plant and machinery supply systems.
- Standby generator distribution arrangements.
- Alternative electrical supply selection.
- Industrial control and automation power distribution.
- Electrical installations requiring four-pole changeover.
- Maintenance and servicing isolation arrangements.
- OEM electrical distribution assemblies.
- Industrial facilities requiring enclosed manual transfer switching.
- Electrical installations requiring a 400 A changeover switch.
