Why Choose the ABB OT250KLUU4C 250 A 4-Pole Enclosed Changeover Switch?
The ABB OT250KLUU4C is a 250 A, 4-pole enclosed changeover switch designed for manual switching between two electrical supply sources in industrial and commercial low-voltage installations. Part of the ABB OT enclosed switch-disconnector range, it provides a robust solution for applications requiring controlled source selection, electrical isolation and dependable load switching.
Featuring a galvanised steel enclosure, a black I-0-II operating handle and a 250 A AC-22A and AC-23A rating at 415 V AC, the OT250KLUU4C is suitable for appropriately rated electrical distribution and power changeover applications. Its four-pole arrangement supports installations requiring simultaneous changeover of four conductors.
Identified by ABB manufacturer product ID 1SCA022474R7660 and order code OT250KLUU4C, this model features an IP54 enclosure, blank cable entry provisions and a padlockable operating handle. Its 800 × 400 × 230 mm enclosure provides a substantial housing for industrial electrical switching installations.
Key Advantages
- 250 A rated current for compatible industrial electrical distribution applications.
- 4-pole changeover configuration supports controlled switching between two electrical sources.
- I-0-II operating positions provide source selection with a central OFF position.
- 250 A AC-22A rating at 415 V AC for appropriately rated mixed-load switching.
- 250 A AC-23A rating at 415 V AC for compatible motor and inductive-load switching duties.
- IP54-rated steel enclosure provides protection against dust and splashing water.
- Black padlockable operating handle supports controlled electrical isolation.
- Cover interlock helps restrict access to internal components during normal operation.
- Neutral and protective earth terminals support electrical installation.
- Blank cable entry provisions allow suitable cable entry arrangements to be selected.
- Galvanised steel enclosure with protective coating provides a durable housing.
- Auxiliary contact expansion capability supports compatible indication and control arrangements.
- Suitable for manual changeover between mains, generator and alternative electrical supplies.
Key Features
- ABB OT250KLUU4C enclosed changeover switch.
- 250 A rated operational current.
- 4-pole switching arrangement.
- Manual I-0-II changeover operation.
- 250 A AC-22A at 415 V AC.
- 250 A AC-23A at 415 V AC.
- IP54 enclosure protection rating.
- Galvanised steel enclosure.
- Black operating handle.
- Padlockable handle for controlled isolation.
- 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 arrangement: 4 NO + 4 NC.
- 800 × 400 × 230 mm enclosure dimensions.
- 25 kg catalogue weight.
Technical Specifications
- Manufacturer: ABB
- Series: OT Enclosed Changeover Switches
- Model: OT250KLUU4C
- ABB order code: OT250KLUU4C
- ABB manufacturer product ID: 1SCA022474R7660
- Product group: 311019 – Metal Enclosed (Loadbreak)
- Product type: Enclosed manual changeover switch-disconnector
- Rated current: 250 A
- Number of poles: 4
- Switching positions: I-0-II
- Operating method: Manual changeover
- Rated operational current AC-22A at 415 V AC: 250 A
- Rated operational current AC-23A at 415 V AC: 250 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
- 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: 230 mm
- Dimensions (H × W × D): 800 × 400 × 230 mm
- Catalogue weight: 25 kg
- Primary function: Manual electrical source changeover and isolation
Manual Power Source Changeover for Industrial Electrical Distribution
The ABB OT250KLUU4C provides a manually operated means of transferring compatible electrical loads between two supply sources. Its I-0-II switching arrangement allows the operator to select the first source, disconnect both sources in the central OFF position or select the second source.
This arrangement is relevant to installations incorporating a normal mains supply and an alternative supply, such as a generator. The four-pole configuration can support applications where four conductors require coordinated switching, subject to the installation's earthing, neutral and electrical distribution requirements.
The 250 A AC-22A and AC-23A ratings at 415 V AC make the switch suitable for appropriately selected mixed, inductive and motor loads. Final equipment selection must consider the operating voltage, load current, switching duty, prospective fault current and applicable electrical standards.
The IP54 galvanised steel enclosure provides protection against limited dust ingress and splashing water. Its padlockable handle and interlocked cover support controlled operation and maintenance access. The blank cable entry arrangement requires suitable cable entry components and installation practices to maintain the required enclosure protection.
The OT250KLUU4C is a manual changeover device, not an automatic transfer switch. Automatic supply monitoring, generator starting and automatic source transfer require additional appropriately designed equipment.
Typical Applications
- Manual mains-to-generator changeover installations.
- Industrial electrical supply source selection.
- Commercial building power distribution.
- Manufacturing and production facilities.
- Industrial plant and machinery supply systems.
- Backup power distribution arrangements.
- Alternative electrical supply selection.
- Industrial control and automation power supplies.
- Electrical installations requiring four-pole changeover.
- Maintenance and servicing isolation arrangements.
- OEM electrical distribution assemblies.
- Industrial facilities requiring enclosed manual transfer switching.
