ABB OT630KAUR3TZ 630A 3-Pole IP65 Steel Enclosed Safety Switch with Bottom Cable Entries
The ABB OT630KAUR3TZ is a heavy-duty 630 A, three-pole steel enclosed safety switch-disconnector designed for dependable electrical isolation in industrial and commercial low-voltage installations. Featuring an IP65-rated galvanised steel enclosure, bottom cable-entry arrangement and padlockable operating handle, this ABB industrial isolator provides a robust solution for machinery, motors and electrical distribution systems.
Identified by ABB manufacturer reference 1SCA022281R7630, the OT630KAUR3TZ belongs to ABB's established OT enclosed safety switch family and is classified within the 311019-Metal Enclosed (Loadbreak) product group. Its three-pole configuration enables coordinated disconnection of three-phase electrical circuits, supporting safe maintenance and operational isolation.
The switch is specified as a 630 A class safety switch, with a manufacturer-listed 570 A operational current under AC-23A conditions. It provides a maximum AC-23A motor switching capacity of 315 kW at 415 V AC and 560 kW at 690 V AC, making it suitable for appropriately rated industrial motor and machinery applications.
The 1000 × 800 × 230 mm galvanised steel enclosure features a protective polyester coating and UV-resistant construction. Its bottom cable-entry arrangement provides eight ring-flange positions, while the top entry plate remains blank for the specified configuration.
Additional features include a black padlockable operating handle, interlocked enclosure cover, 2 normally open and 1 normally closed auxiliary contacts, and an integrated pressure-relief design intended to help protect personnel in the event of an internal arc.
Key Advantages
- 630 A product rating for heavy-duty industrial electrical isolation applications.
- 570 A AC-23A operational current for appropriately rated switching duties.
- Three-pole (3P) configuration for coordinated isolation of three-phase circuits.
- 315 kW motor switching capacity at 415 V AC.
- 560 kW motor switching capacity at 690 V AC.
- IP65 galvanised steel enclosure providing dust-tight protection and resistance to water jets.
- Bottom cable-entry arrangement with eight ring-flange positions.
- Blank top entry plate for the specified enclosure configuration.
- UV-resistant polyester-coated enclosure suitable for appropriately designed outdoor installations.
- Black padlockable handle supporting controlled maintenance isolation.
- Handle accommodates up to three padlocks.
- Interlocked enclosure cover with an authorised bypass facility.
- 2 NO + 1 NC auxiliary contacts for compatible control and indication circuits.
- Auxiliary contacts wired to terminal blocks.
- Integrated gas-pressure relief function to help manage pressure during an internal arc event.
- Enclosure door earthed through its hinges.
- Suitable for single and parallel cable installation arrangements.
- ABB industrial switch-disconnector technology for demanding operating environments.
Key Features
- ABB OT enclosed safety switch-disconnector.
- OT630KAUR3TZ model designation.
- 630 A product current class.
- 570 A listed operational current under AC-23A conditions.
- Three main switching poles.
- Manual ON/OFF switching and isolation.
- Galvanised steel enclosure.
- Protective polyester coating.
- IP65 ingress protection.
- UV-resistant construction.
- Black pistol-type operating handle.
- Padlockable handle for up to three padlocks.
- Interlocked enclosure cover.
- Interlock bypass provision for authorised thermographic inspection.
- Bottom ring-flange cable-entry positions.
- Blank top cable-entry plate.
- Eight ring-flange positions at the bottom.
- Four ring-flange covers included.
- 2 NO + 1 NC auxiliary contacts.
- Auxiliary contacts wired to terminal blocks.
- Internal pressure-relief function.
- Door earthing through the hinges.
- 1000 × 800 × 230 mm enclosure dimensions.
- 50 kg listed product weight.
Technical Specifications
- Manufacturer: ABB
- Product series: OT Enclosed Safety Switches
- Model: OT630KAUR3TZ
- ABB order code: OT630KAUR3TZ
- ABB manufacturer reference: 1SCA022281R7630
- Product group: 311019-Metal Enclosed (Loadbreak)
- Product type: Steel enclosed safety switch-disconnector
- Product current class: 630 A
- Rated continuous current (Iu): 570 A
- Rated operational current AC-23A at 415 V AC: 570 A
- Rated operational current AC-23A at 690 V AC: 570 A
- Rated operational voltage: Up to 1000 V AC
- Rated operational power AC-23A at 230 V AC: 180 kW
- Rated operational power AC-23A at 415 V AC: 315 kW
- Rated operational power AC-23A at 500 V AC: 400 kW
- Rated operational power AC-23A at 690 V AC: 560 kW
- Rated short-time withstand current (Icw): 20 kA
- Number of poles: 3
- Pole configuration: 3P
- Utilisation category: AC-23A
- Switching function: Manual loadbreak switching and isolation
- Operating positions: ON/OFF
- Enclosure material: Galvanised steel
- Enclosure finish: Polyester coating
- Ingress protection: IP65
- UV resistance: UV-resistant enclosed construction
- Operating handle: Black pistol-type handle
- Handle locking: Padlockable for up to three padlocks
- Cover interlocking: Interlocked with authorised bypass facility
- Pressure-relief function: Integrated gas-pressure relief
- Door earthing: Through enclosure hinges
- Cable-entry configuration: Blank top / ring-flange bottom
- Bottom cable-entry positions: 8 ring-flange positions
- Ring-flange covers included: 4
- Auxiliary contacts: 2 NO + 1 NC
- Auxiliary contact wiring: Wired to terminal blocks
- Cable arrangement: Prepared for single and parallel cables
- Enclosure height: 1000 mm
- Enclosure width: 800 mm
- Enclosure depth: 230 mm
- Dimensions (H × W × D): 1000 × 800 × 230 mm
- Listed product weight: 50 kg
- EAN / GTIN: 6417019070438
- Country of origin: Finland
- Relevant switch-disconnector standard: IEC/EN 60947-3
Heavy-Duty Three-Phase Electrical Isolation
The ABB OT630KAUR3TZ provides a dedicated electrical isolation point for high-current industrial machinery and distribution equipment. Its three-pole switching mechanism enables simultaneous disconnection of the three phase conductors in an appropriately designed electrical circuit.
Although the product belongs to the 630 A size class, ABB's published specifications identify a 570 A rated continuous current for this exact enclosed assembly. Electrical designers should use the applicable manufacturer-rated current and switching-duty values when assessing installation suitability.
The AC-23A utilisation category makes the switch suitable for switching motor loads and other highly inductive circuits within its specified electrical ratings.
Its published motor power ratings include 180 kW at 230 V AC, 315 kW at 415 V AC, 400 kW at 500 V AC and 560 kW at 690 V AC.
These ratings help electrical engineers select the switch for demanding machinery and industrial motor applications. Final selection must account for the connected load, operating voltage, utilisation category, switching frequency, prospective fault current and protective-device coordination.
The switch-disconnector provides manual switching and isolation rather than automatic overload protection. Appropriate circuit breakers, fuses or other protective devices must be installed where required.
Bottom Cable-Entry Configuration for Industrial Installations
A defining feature of the OT630KAUR3TZ is its bottom-entry cable arrangement, designed to accommodate industrial power cable routing.
The specified enclosure configuration includes a blank top entry plate and eight ring-flange positions at the bottom. This arrangement is particularly useful where power cables approach the isolation switch from below, such as cable trenches, floor ducts or lower-level distribution routes.
The assembly includes four ring-flange covers. Suitable compression glands, cable flanges and other entry accessories must be selected according to the cable arrangement and installation requirements.
ABB identifies the enclosure as being prepared for single and parallel cable arrangements, providing flexibility for suitably engineered high-current electrical connections.
All cable entries must be correctly sealed to maintain the required IP65 ingress protection. Cable termination, bending radius, conductor support and protective earthing must also comply with the manufacturer's instructions.
IP65 Galvanised Steel Enclosure with Pressure Relief
The OT630KAUR3TZ uses a galvanised steel enclosure with a polyester coating, providing robust mechanical protection and environmental resistance for industrial installations.
Its IP65 rating provides dust-tight protection and resistance to water jets when the enclosure and cable entries are correctly installed and sealed.
ABB identifies the enclosure as suitable for outdoor use with respect to UV resistance and ingress protection. Environmental factors such as corrosion exposure, condensation, temperature and mounting location must still be considered during installation.
An important safety feature is the integrated gas-pressure relief function, designed to help manage pressure in the event of an internal arc fault. This feature forms part of the enclosure design but does not eliminate the need for appropriate short-circuit protection or safe electrical working procedures.
The enclosure door is earthed through its hinges, supporting electrical continuity as part of the enclosure's protective earthing arrangement.
With dimensions of 1000 mm high, 800 mm wide and 230 mm deep and a listed weight of 50 kg, the switch requires secure fixed mounting and appropriate structural support.
Padlockable Handle and Interlocked Cover
The black pistol-type operating handle provides manual ON/OFF control and can be secured using up to three padlocks. This supports controlled electrical isolation during machinery maintenance and servicing.
The enclosure cover is interlocked with the switching mechanism, helping restrict normal access to internal electrical components while the switch is in the ON position.
ABB also provides an authorised interlock bypass function for activities such as thermographic inspection. This facility must only be used by suitably qualified personnel following appropriate electrical safety procedures.
The assembly includes 2 normally open and 1 normally closed auxiliary contacts, wired to terminal blocks for compatible control and indication applications.
These auxiliary contacts can support switch-position indication, machinery control interfaces and maintenance monitoring when incorporated into appropriately designed electrical circuits.
Typical Applications
- Heavy-duty industrial electrical isolation.
- Three-phase machinery supply switching.
- High-power industrial motor isolation.
- Manufacturing and processing facilities.
- Industrial pumping and water treatment equipment.
- Large ventilation and extraction systems.
- Conveyor and bulk material handling equipment.
- Industrial electrical distribution systems.
- Commercial and industrial building services.
- Outdoor electrical equipment requiring IP65 protection.
- Maintenance isolation for industrial plant.
- High-current installations with bottom-entry power cables.
- Electrical engineering and OEM machinery projects.
- Applications requiring a 630 A class three-pole steel enclosed safety switch.
