Why Choose the ABB OT630KLUU3AZ 315kW 3-Pole Steel Enclosed Safety Switch?
The ABB OT630KLUU3AZ (1SCA022549R2510) is a heavy-duty three-pole steel enclosed safety switch-disconnector designed for reliable manual isolation and load switching in demanding industrial electrical installations. Featuring a highly visible red and yellow pistol-grip operating handle, an IP65-rated steel enclosure and factory-fitted auxiliary contacts, it provides a robust isolation solution for industrial machinery and high-power motor applications.
Part of ABB's established OT enclosed safety switch range, the OT630KLUU3AZ is rated for a maximum 315 kW AC-23A motor output at 415 V AC, with a corresponding 570 A operational switching current. At 690 V AC, ABB specifies a motor switching capability of 560 kW at 570 A.
Although the product belongs to ABB's 630 A frame range, the published operational current for this enclosed configuration is 570 A under the specified AC-23A conditions. The applicable operational rating should be used when selecting the switch for an electrical installation.
The OT630KLUU3AZ is housed in a grey sheet-steel enclosure with IP65 ingress protection. It features a red/yellow ON/OFF handle, a cover interlock with defeatable interlock facility, protective earth terminal and two normally open plus one normally closed auxiliary contacts wired to terminal blocks.
With blank cable-entry positions at the top and bottom, the enclosure can be configured using separately selected compression glands or flanges. Its substantial 1000 × 400 × 230 mm construction makes it suitable for high-current industrial electrical installations requiring dependable manual switching and controlled isolation.
Key Advantages
- 315 kW motor switching capability at 415 V AC under AC-23A conditions.
- 570 A operational current rating for the specified enclosed switching duty.
- 630 A frame designation within ABB's high-current OT range.
- Three-pole switching configuration for coordinated operation of three main conductors.
- IP65 steel enclosure provides protection against dust ingress and water jets when correctly installed.
- Red/yellow pistol-grip handle provides a highly visible industrial isolation point.
- Clear I–O / ON–OFF position indication supports straightforward manual operation.
- Two normally open and one normally closed auxiliary contacts included as standard.
- Auxiliary contacts wired to terminal blocks for convenient control circuit connections.
- Cover interlock supports controlled access to internal components.
- Defeatable interlock facility allows authorised access under appropriate procedures.
- Protective earth terminal included for suitable electrical connection arrangements.
- Blank top and bottom cable entries allow flexible cable routing.
- Compatible compression glands and flanges can be selected separately.
- Robust grey steel enclosure provides mechanical protection in industrial environments.
- 560 kW AC-23A motor switching capability at 690 V AC for suitable applications.
- Genuine ABB safety switching equipment with traceable manufacturer identification.
Key Features
- Manufacturer: ABB.
- Model: OT630KLUU3AZ.
- ABB order code: OT630KLUU3AZ.
- Manufacturer part number: 1SCA022549R2510.
- Product family: ABB OT.
- Product type: Steel enclosed safety switch-disconnector.
- Frame designation: 630 A.
- Rated operational current: 570 A under the specified AC-23A conditions.
- Number of poles: 3.
- Maximum motor output at 415 V AC: 315 kW.
- Maximum motor output at 690 V AC: 560 kW.
- Enclosure material: Sheet steel.
- Enclosure colour: Grey.
- Ingress protection: IP65.
- Operating handle: Red/yellow pistol grip.
- Operating positions: I–O / ON–OFF.
- Auxiliary contacts: 2 NO + 1 NC.
- Auxiliary contact connections: Wired to terminal blocks.
- Cover interlock: Included.
- Defeatable interlock: Included.
- Protective earth terminal: Included.
- Cable-entry positions: Top and bottom.
- Cable-entry configuration: Blank entry plates.
- Cable-entry glands and flanges: Ordered separately.
- Enclosure dimensions: 1000 × 400 × 230 mm.
- Approximate unit weight: 31 kg.
- EAN: 6417019174402.
Technical Specifications
- Manufacturer: ABB
- Brand: ABB
- Product series: OT Enclosed Safety Switches
- Model: OT630KLUU3AZ
- ABB order code: OT630KLUU3AZ
- Manufacturer part number: 1SCA022549R2510
- ABB product group: 311019 – Metal Enclosed (Loadbreak)
- Product description: 315kW at 400V, 3-Pole Steel Enclosed Safety Switch, Red/Yellow Handle
- Product type: Manual enclosed safety switch-disconnector
- Switching function: ON/OFF load-break switching and isolation
- Number of main poles: 3
- Frame designation: 630 A
- Rated operational current AC-23A at 415 V: 570 A
- Rated operational current AC-23A at 690 V: 570 A
- Maximum motor output AC-23A at 415 V: 315 kW
- Maximum motor output AC-23A at 690 V: 560 kW
- Enclosure material: Sheet steel
- Enclosure colour: Grey
- Ingress protection rating: IP65
- Operating method: Manual, front operated
- Operating handle: Red/yellow pistol grip
- Handle position indication: I–O / ON–OFF
- Auxiliary contacts fitted: 2 NO + 1 NC
- Maximum auxiliary contact configuration: 2 NO + 1 NC
- Auxiliary contact wiring: Pre-wired to terminal blocks
- Cover interlock: Included
- Defeatable cover interlock: Included
- Protective earth terminal: Included
- Main cable-entry arrangement: Blank cable-entry plates
- Cable-entry locations: Top and bottom
- Cable openings per side: Blank / Blank
- Compression glands included: No; ordered separately
- Cable-entry flanges included: No; ordered separately
- Enclosure height: 1000 mm
- Enclosure width: 400 mm
- Enclosure depth: 230 mm
- Dimensions (H × W × D): 1000 × 400 × 230 mm
- Approximate unit weight: 31 kg
- EAN: 6417019174402
- Primary application: High-current industrial electrical isolation
- Automatic overload protection: Not included
- Automatic short-circuit tripping: Not included
- Changeover function: Not included
315kW AC-23A Motor Switching at 415V
The ABB OT630KLUU3AZ is designed for demanding industrial motor switching applications, with a published 315 kW AC-23A motor output rating at 415 V AC.
This rating is particularly relevant when selecting a safety switch for high-power three-phase motors or other highly inductive electrical loads.
The AC-23A utilisation category addresses switching duties involving motor loads and other highly inductive circuits under the applicable standard conditions.
At 690 V AC, ABB specifies a maximum AC-23A motor output of 560 kW.
These figures should not be interpreted as universal motor suitability. Engineers must also consider the motor starting characteristics, load current, switching frequency, operating conditions and the required protective device coordination.
The OT630KLUU3AZ is a manually operated safety switch-disconnector and does not independently provide motor overload protection.
630A Frame Designation and 570A Operational Current
The OT630KLUU3AZ belongs to ABB's 630 A frame range of enclosed switch-disconnectors.
However, ABB's published product table identifies a 570 A operational current for the enclosed assembly under the listed AC-23A conditions.
The difference between the frame designation and the applicable operational current is important for electrical equipment selection.
The 630 A designation identifies the product's frame family, while the 570 A figure is the current associated with its specified enclosed motor-switching duty.
When designing an installation, the operational current rating must be considered alongside the supply voltage, utilisation category, ambient conditions and protective device requirements.
The product should not be assumed suitable for a 630 A continuous operational load solely because its model code begins with OT630.
Three-Pole Switching for Industrial Electrical Isolation
The three-pole switching configuration of the OT630KLUU3AZ provides coordinated manual operation of three main conductors.
In suitable three-phase electrical systems, these poles are typically used to switch the three phase conductors together.
The mechanical switching arrangement provides a defined ON/OFF operating function through the external handle.
The switch is designed for manual electrical isolation and load switching. It is not an automatic transfer switch or a three-position changeover switch.
Where neutral switching is required, a suitable alternative pole configuration must be selected according to the electrical system design.
The protective earth conductor must remain continuous and must not be interrupted by the switch-disconnector.
Highly Visible Red and Yellow Safety Handle
A defining feature of the ABB OT630KLUU3AZ is its red and yellow pistol-grip operating handle.
The high-visibility handle provides a clearly identifiable manual isolation point for industrial machinery and electrical equipment.
Its I–O / ON–OFF position indication allows authorised personnel to identify the switch position without routinely opening the enclosure.
This handle arrangement is particularly useful in industrial installations where clearly identifiable electrical isolation points form part of machinery maintenance and safety procedures.
Any specific padlocking requirements should be checked against the applicable ABB handle and enclosure documentation before installation.
The operating handle must be used as part of a complete safe isolation procedure, including prevention of unintended reconnection and verification that the circuit is de-energised before maintenance begins.
IP65 Grey Steel Enclosure
The OT630KLUU3AZ is supplied in a grey sheet-steel enclosure designed for industrial electrical applications.
The enclosure provides robust mechanical protection for the internal switch-disconnector mechanism and its power connections.
Its IP65 ingress protection rating indicates protection against dust ingress and water jets when the complete assembly is correctly installed.
This level of protection is useful in industrial environments where dust and moisture exposure must be considered.
However, IP65 does not automatically establish suitability for every outdoor, corrosive or high-pressure cleaning environment. The installation conditions must be evaluated against the complete product specification.
The enclosure measures 1000 mm high × 400 mm wide × 230 mm deep and weighs approximately 31 kg.
Appropriate mounting support, cable bending space and operating clearances should be provided during installation.
Cover Interlock and Defeatable Interlock Arrangement
The ABB OT630KLUU3AZ includes a cover interlock intended to support controlled access to the enclosure.
ABB also specifies a defeatable interlock facility, allowing authorised personnel to bypass the interlock where permitted by the applicable maintenance procedures.
This arrangement is useful in industrial installations where controlled inspection or servicing access may be required.
The interlock does not replace electrical safety procedures. Internal components must only be accessed by competent personnel following the applicable isolation and risk-control requirements.
Factory-Fitted 2 NO + 1 NC Auxiliary Contacts
The OT630KLUU3AZ is supplied with two normally open and one normally closed auxiliary contacts (2 NO + 1 NC).
These contacts support compatible electrical control and indication functions, such as signalling the position of the safety switch to a control circuit or monitoring system.
ABB specifies that the auxiliary contacts are wired to terminal blocks for this product size.
This can simplify the connection of suitable control wiring during installation.
The maximum published auxiliary contact arrangement for this configuration is also 2 NO + 1 NC. Additional contacts should not be assumed available without confirmation from ABB.
Auxiliary contacts must be used within their own electrical ratings and must not be used as substitutes for the main power switching poles.
Blank Top and Bottom Cable Entries
The ABB OT630KLUU3AZ features blank cable-entry plates at both the top and bottom of its steel enclosure.
This arrangement provides flexibility when configuring incoming and outgoing power cable routes.
ABB specifies that suitable compression glands or cable-entry flanges must be ordered separately.
The blank cable-entry plates are also used as part of the enclosure fixing arrangement, so the correct installation method must follow ABB's instructions.
Suitable cable-entry components must be selected according to the cable size, cable type, mechanical requirements and required ingress protection.
Any prepared cable openings must be correctly sealed to maintain the completed enclosure's IP65 protection.
Protective Earth Terminal Included
The OT630KLUU3AZ includes a protective earth terminal for appropriate electrical connection arrangements.
This supports the required earthing and bonding of the enclosed electrical equipment.
The protective earth conductor must remain continuous and must be connected in accordance with the electrical installation design and applicable regulations.
The presence of a protective earth terminal does not mean the switch provides automatic earth-fault or overcurrent protection.
Safety Switch-Disconnector Versus Circuit Breaker
The ABB OT630KLUU3AZ is a manual safety switch-disconnector, not an automatic circuit breaker.
Its purpose is to provide manual switching and electrical isolation of appropriately rated circuits.
It does not independently detect overloads or short circuits and trip automatically.
Suitable overload, short-circuit and motor protection devices must therefore be included elsewhere in the complete electrical installation.
Engineers must verify the prospective fault current, protective device coordination, conductor ratings and switching duty before energising the system.
Typical Applications
- High-power motor isolation: Manual switching of appropriately rated three-phase motor circuits.
- Industrial machinery: Clearly identifiable local electrical isolation for suitable equipment.
- Manufacturing facilities: Isolation of substantial production and processing machinery.
- Industrial power distribution: High-current manual switching in suitable low-voltage systems.
- Motor control installations: Incorporation into appropriately engineered motor supply arrangements.
- Industrial pumping systems: Isolation of compatible high-power pump motors.
- Ventilation and mechanical plant: Manual switching of suitable industrial fan and motor circuits.
- Process plant installations: Electrical isolation in demanding industrial environments.
- Industrial maintenance: Supporting controlled isolation before servicing equipment.
- OEM machinery: Integration into engineered industrial electrical systems.
- Electrical plant rooms: Enclosed switching for substantial electrical supplies.
- Distribution system upgrades: Replacement of compatible high-current enclosed safety switches.
- Industrial electrical contracting: Installation of complete metal enclosed load-break switching assemblies.
