Why Choose the ABB OT630KAUA3T 630A 3-Pole IP54 Steel Enclosed Safety Switch?
The ABB OT630KAUA3T, manufacturer order number 1SCA022277R0570, is a heavy-duty 630 A three-pole steel enclosed safety switch designed for industrial electrical isolation and manual load switching. Part of ABB's metal enclosed load-break switch range, this substantial switch-disconnector assembly combines a high-capacity switching mechanism, protective steel enclosure and dedicated bottom cable-entry arrangement.
The OT630KAUA3T is specified with an IP54 enclosure rating and is designed for industrial installations where machinery and electrical equipment require a robust, accessible means of disconnection. Its three-pole configuration enables the three phase conductors of an appropriately designed circuit to be switched together through one operating mechanism.
ABB's technical information identifies a 570 A AC-23A rated operational current at 380–415 V AC and a 315 kW AC-23A motor switching rating at 400 V AC. Although the product belongs to the 630 A class, the published conventional enclosed thermal current is 460 A. These distinctions are important when selecting the switch for a specific voltage, load and switching duty.
The steel sheet enclosure measures 1000 × 800 × 230 mm and incorporates an open-bottom cable-entry arrangement with a blank top entry plate. The switch is supplied with a black pistol-type operating handle, two normally open and one normally closed auxiliary contacts, and a protective earth terminal. Suitable bottom cable-entry plates and flanges must be selected separately to complete the installation.
Key Advantages
- 630 A-class industrial safety switch for high-capacity electrical installations.
- Three-pole switching provides simultaneous disconnection of three phase conductors.
- 570 A AC-23A operational current rating at 380–415 V AC.
- 315 kW AC-23A motor switching capacity at 400 V AC.
- IP54 steel sheet enclosure protects against dust and water splashes.
- Bottom cable-entry design suits installations where cables approach from below.
- Open-bottom enclosure arrangement allows compatible cable-entry plates and flanges to be selected for the installation.
- Blank top entry plate supports a bottom-entry cable-routing layout.
- Black pistol-type operating handle provides clear external ON/OFF operation.
- Two normally open auxiliary contacts for supplementary control and indication.
- One normally closed auxiliary contact for additional control circuit functions.
- Protective earth terminal included for the enclosure's earthing arrangement.
- Robust steel construction suited to demanding industrial environments.
- ABB OT630 switching technology for manual load-break and isolation applications.
- High-power motor switching capability when correctly selected for the applicable voltage and utilisation category.
Key Features
- Manufacturer: ABB.
- Model: OT630KAUA3T.
- Manufacturer order number: 1SCA022277R0570.
- ABB product group: 311019 – Metal Enclosed (Loadbreak).
- Product type: Steel enclosed safety switch / load-break switch disconnector.
- Product family: ABB OT630.
- Current classification: 630 A.
- Number of switched poles: 3.
- Conventional enclosed thermal current: 460 A.
- Rated operational current, AC-23A at 380–415 V: 570 A.
- Rated operational current, AC-23A at 500 V: 570 A.
- Rated operational current, AC-23A at 690 V: 570 A.
- Motor switching power, AC-23A at 230 V: 180 kW.
- Motor switching power, AC-23A at 400 V: 315 kW.
- Motor switching power, AC-23A at 500 V: 400 kW.
- Motor switching power, AC-23A at 690 V: 560 kW.
- Rated operational voltage: Up to 1000 V, subject to the applicable switching ratings.
- Ingress protection: IP54.
- Enclosure material: Steel sheet.
- Cable-entry position: Bottom.
- Cable-entry configuration: Open bottom with blank top entry plate.
- Operating handle: Black pistol-type handle.
- Handle indication: I–0 / ON–OFF.
- Auxiliary contacts supplied: 2 NO + 1 NC.
- Protective earth terminal: Included.
- Enclosure dimensions: 1000 × 800 × 230 mm.
- Product net weight: 46 kg.
Technical Specifications
- Manufacturer: ABB
- ABB order code: OT630KAUA3T
- Manufacturer article number: 1SCA022277R0570
- ABB product group: 311019 – Metal Enclosed (Loadbreak)
- Product description: 630 A, 3-pole, IP54 steel enclosed safety switch with bottom cable entry
- Product series: ABB OT630
- Product category: Metal enclosed safety switches and load-break switch disconnectors
- Number of switched poles: 3
- Current classification: 630 A
- Conventional enclosed thermal current (Ithe): 460 A
- Rated operational current (AC-22A, 500 V): 570 A
- Rated operational current (AC-22A, 690 V): 570 A
- Rated operational current (AC-23A, 380–415 V): 570 A
- Rated operational current (AC-23A, 500 V): 570 A
- Rated operational current (AC-23A, 690 V): 570 A
- Rated operational power (AC-23A, 220–240 V): 180 kW
- Rated operational power (AC-23A, 400 V): 315 kW
- Rated operational power (AC-23A, 500 V): 400 kW
- Rated operational power (AC-23A, 690 V): 560 kW
- Rated operational voltage: 1000 V
- Pollution degree: 3
- Degree of protection: IP54 to IEC 60529
- Enclosure material: Steel sheet
- Cable-entry position: Bottom
- Bottom cable-entry arrangement: Open bottom
- Top cable-entry arrangement: Blank entry plate
- Cable-entry accessories: Compatible bottom entry plates and flanges ordered separately
- Line terminal arrangement: Bottom in – bottom out
- Protective earth terminal arrangement: Bottom in – bottom out
- Operating handle: Black pistol-type handle
- Handle marking: I–0 / ON–OFF
- Normally open auxiliary contacts: 2
- Normally closed auxiliary contacts: 1
- Total included auxiliary contacts: 2 NO + 1 NC
- Protective earth terminal: Included
- Enclosure height: 1000 mm
- Enclosure width: 800 mm
- Enclosure depth: 230 mm
- Product net weight: 46 kg
- EAN: 6417019063645
- Relevant switch-disconnector standard: IEC 60947-3
- ABB safety switch catalogue reference: 1SCC340006C0201
630A-Class Three-Phase Isolation with IP54 Steel Enclosure and Bottom Cable Entry
The ABB OT630KAUA3T is designed for industrial installations where high-capacity three-phase equipment requires a dependable means of manual switching and isolation. Its three-pole switching mechanism operates the three phase conductors together, allowing appropriately designed machinery and distribution circuits to be disconnected using a single external operating handle.
Although identified as a 630 A-class safety switch, the product's electrical ratings must be considered individually. ABB specifies a 460 A conventional enclosed thermal current and 570 A AC-23A operational current at 380–415 V AC. The AC-23A motor switching power is 315 kW at 400 V, increasing to 400 kW at 500 V and 560 kW at 690 V. The correct rating for any installation depends on the operating voltage, load characteristics and required switching duty.
The IP54 steel sheet enclosure provides protection against limited dust ingress and water splashes from any direction. This makes it appropriate for many industrial environments where equipment needs protection from ordinary workshop or plant-room conditions. However, IP54 is not equivalent to IP65 and should not be specified where dust-tight protection or resistance to water jets is required without additional engineering measures.
The OT630KAUA3T features an open-bottom cable-entry arrangement with a blank top entry plate. This configuration is particularly useful for installations where large power cables approach from below. ABB specifies that the appropriate bottom cable-entry plates and flanges must be ordered separately. These accessories also form part of the enclosure mounting arrangement, so the correct selection is important for both mechanical installation and environmental protection.
The supplied black pistol-type operating handle provides clear I–0 / ON–OFF switching. The unit also includes two normally open and one normally closed auxiliary contacts, allowing supplementary indication or control functions to be incorporated into the electrical design. A protective earth terminal is provided for the required earthing arrangement.
The OT630KAUA3T is a manual load-break switch disconnector, not an automatic circuit breaker or overload protective device. Appropriate upstream or associated protective devices must be selected for the installation. Maintenance personnel should follow approved safe-isolation procedures, including preventing unintended reconnection and verifying the absence of voltage before work begins.
Typical Applications
- 630 A-class industrial electrical isolation.
- Three-phase machinery supply disconnection.
- 315 kW AC-23A motor switching applications at 400 V, subject to correct electrical selection.
- Industrial manufacturing and production facilities.
- High-capacity motor control and machinery installations.
- Industrial pumps, fans and compressors.
- Conveyor and material handling systems.
- Processing plants and heavy industrial machinery.
- Industrial electrical distribution circuits.
- Bottom-fed equipment and electrical enclosures.
- Installations using floor-level cable trays, ducts or trenches.
- Maintenance isolation points requiring an IP54 steel enclosed safety switch.
