Why Choose the ABB OT400DTAA3T 400 A 3-Pole IP54 EMC Enclosed Safety Switch?
The ABB OT400DTAA3T (1SCA022398R9620) is a heavy-duty 400 A, three-pole EMC enclosed safety switch-disconnector designed for reliable electrical isolation and load switching in industrial installations. Part of ABB's OT enclosed safety switch range, it combines a robust steel sheet enclosure, IP54 ingress protection and an electromagnetic compatibility (EMC) design suitable for installations where electromagnetic disturbances must be controlled.
Featuring a 220 kW AC-23A motor switching rating at 400 V AC, the OT400DTAA3T is suitable for appropriately rated three-phase motors, machinery and industrial electrical distribution equipment. Its three-pole switching mechanism provides simultaneous disconnection of the three phase conductors, while the black pistol-grip operating handle offers clear manual ON/OFF control.
The switch is supplied with two normally open and one normally closed auxiliary contacts, a protective earth terminal and an interlocked enclosure cover. Its open top and bottom cable entry arrangement allows suitable EMC cable entry accessories to be selected separately, supporting effective installation of screened cables while maintaining the required enclosure protection.
Key Advantages
- 400 A current rating for demanding industrial electrical applications.
- Three-pole switching configuration provides simultaneous disconnection of three phase conductors.
- 220 kW AC-23A motor switching capability at 400 V AC for appropriately rated motor circuits.
- EMC-oriented construction supports electrical installations requiring effective management of electromagnetic disturbances.
- IP54 steel enclosure provides protection against harmful dust ingress and splashing water when correctly installed.
- Black pistol-grip operating handle enables straightforward manual ON/OFF operation.
- Interlocked enclosure cover provides controlled access to the internal switching equipment.
- Defeatable cover interlock supports authorised maintenance procedures.
- Open top and bottom cable entries provide flexibility for screened cable routing.
- Two normally open auxiliary contacts support suitable signalling and control functions.
- One normally closed auxiliary contact provides an additional indication or interlocking option.
- Protective earth terminal included for appropriate electrical earthing.
- Compatible EMC cable entry accessories can be selected to suit the installation.
- Suitable for industrial motor isolation, machinery and electrical distribution systems.
Key Features
- ABB OT400DTAA3T EMC enclosed safety switch.
- 400 A nominal current rating.
- Three-pole switch-disconnector mechanism.
- IP54-rated steel sheet enclosure.
- EMC safety switch construction.
- AC-23A motor switching power at 230 V AC: 110 kW.
- AC-23A motor switching power at 400 V AC: 220 kW.
- AC-23A motor switching power at 500 V AC: 280 kW.
- AC-23A motor switching power at 690 V AC: 355 kW.
- Black pistol-grip operating handle.
- I–0 / ON–OFF manual switching.
- Interlocked cover with defeatable interlock.
- Open top and bottom cable entry arrangement.
- Suitable cable entry opening: 400 × 230 mm.
- Auxiliary contacts included: 2 NO + 1 NC.
- Protective earth terminal included.
- Grey steel enclosure.
- Catalogue weight: Approximately 23 kg.
- EMC cable entry components and flanges: Ordered separately.
- Designed for fixed industrial electrical installations.
Technical Specifications
- Manufacturer: ABB
- Series: OT Enclosed Safety Switches
- Model: OT400DTAA3T
- ABB order code: OT400DTAA3T
- ABB product ID: 1SCA022398R9620
- EAN: 6417019130071
- Product type: EMC enclosed safety switch-disconnector
- Nominal current rating: 400 A
- Number of poles: 3
- Enclosure material: Steel sheet
- Enclosure colour: Grey
- Enclosure protection rating: IP54
- EMC configuration: EMC safety switch for installations using screened cables
- Operating handle: Pistol-grip handle
- Operating handle colour: Black
- Operating positions: I–0 / ON–OFF
- Operating principle: Manual switch-disconnector
- Cover interlocking: Interlocked cover with defeatable interlock
- Top cable entry: Open
- Bottom cable entry: Open
- Suitable cable entry opening: 400 × 230 mm
- Cable entry components: EMC-compatible entry plates and flanges ordered separately
- AC-23A maximum motor output at 230 V AC: 110 kW
- AC-23A maximum motor output at 400 V AC: 220 kW
- AC-23A maximum motor output at 500 V AC: 280 kW
- AC-23A maximum motor output at 690 V AC: 355 kW
- Normally open auxiliary contacts included: 2 NO
- Normally closed auxiliary contacts included: 1 NC
- Maximum auxiliary contact configuration: 2 NO + 1 NC
- Protective earth terminal: Included
- Catalogue weight: Approximately 23 kg
- Installation type: Fixed mounting
- ABB product group: Metal Enclosed (Loadbreak)
- Product category: EMC Metal Enclosed Safety Switches
Reliable 400 A Three-Pole Isolation with EMC Protection and Open Cable Entries
The ABB OT400DTAA3T provides manual electrical switching and isolation for appropriately rated three-phase industrial circuits. Its three-pole mechanism disconnects the three switched conductors together, making it suitable for local isolation of machinery, motor supplies and electrical distribution equipment. With a 220 kW AC-23A motor switching rating at 400 V AC, it supports substantial industrial motor loads where the complete electrical design satisfies the relevant switching requirements.
The EMC steel enclosure is intended for applications where electromagnetic disturbance control is important. Effective EMC performance depends on the complete installation, including the use of suitably screened cables, compatible cable entry components, correct shield termination and appropriate earthing arrangements. ABB specifies that cables used with disturbance-protected safety switches must be shielded.
The enclosure features open top and bottom cable entry areas with a suitable entry opening of 400 × 230 mm. Compatible EMC cable entry plates, flanges and fixing profiles must be selected separately. Correct installation of these components is important for preserving both the intended EMC performance and the IP54 enclosure protection rating.
The included 2 NO + 1 NC auxiliary contacts can be incorporated into suitable indication or electrical interlocking circuits. The black pistol-grip operating handle and interlocked cover provide convenient manual operation and controlled access. As a non-fused switch-disconnector, the OT400DTAA3T requires appropriately coordinated overload and short-circuit protection elsewhere in the electrical installation.
Typical Applications
- Industrial three-phase motor isolation.
- Machinery installations requiring EMC-conscious electrical design.
- Variable speed drive and motor supply installations.
- Industrial electrical distribution systems.
- Manufacturing and production machinery.
- Industrial pumps, fans and ventilation equipment.
- Conveyor and material handling systems.
- Electrical installations using screened power cables.
- Industrial automation and process equipment.
- Local maintenance isolation points.
- Electrical systems requiring auxiliary switch-position signalling.
- Fixed steel enclosed switchgear installations.
- Projects requiring open top and bottom EMC cable entry arrangements.
