Why Choose the ABB OT400DLUU4BZ 400A 4-Pole IP65 Steel Enclosed Safety Switch?
The ABB OT400DLUU4BZ (ABB product ID 1SCA022801R0660) is a heavy-duty 400 A, 4-pole steel enclosed switch disconnector designed for dependable manual load switching and electrical isolation in industrial low-voltage installations. Part of ABB's OT enclosed switch-disconnector range, it combines a robust steel enclosure, a black operating handle, blank cable entry provisions and IP65 ingress protection.
Designed for demanding industrial electrical applications, the OT400DLUU4BZ provides a 400 A AC-23A operational current rating at 380–415 V AC and a corresponding 230 kW AC-23A motor-load switching rating at 415 V AC. Its four mechanically linked switching poles allow simultaneous disconnection of four conductors, making it suitable for compatible three-phase installations requiring four-pole isolation, including switched-neutral arrangements.
The assembly is supplied in a substantial 800 × 400 × 230 mm steel enclosure with blank top and bottom cable entry areas. This arrangement allows installers to prepare cable openings to suit the required cable glands, conductor sizes and routing. The switch includes a black pistol-type handle, cover interlock, defeatable interlock function, neutral and protective earth terminals. With a catalogue unit weight of 24 kg, the OT400DLUU4BZ provides a robust enclosed switching solution for industrial machinery, electrical distribution and maintenance isolation.
Key Advantages
- 400 A four-pole switching capability for demanding industrial electrical installations.
- 230 kW AC-23A motor-load rating at 415 V AC for compatible industrial equipment.
- Four mechanically linked switching poles enable simultaneous disconnection of four conductors.
- IP65-rated steel enclosure provides dust-tight protection and resistance to water jets when correctly installed.
- Blank top and bottom cable entries allow customised cable gland and conduit positioning.
- 400 A AC-23A operational current rating at 380–415 V AC, 500 V AC and 690 V AC.
- Black pistol-type operating handle provides clear manual ON/OFF control.
- Padlockable isolation arrangement supports maintenance safety procedures.
- Interlocked enclosure cover helps restrict normal access to internal connections while the switch is ON.
- Defeatable cover interlock allows controlled access by authorised personnel.
- Neutral and protective earth terminals included for compatible electrical installations.
- Optional auxiliary contacts allow switch-position indication and monitoring.
- 800 × 400 × 230 mm enclosure provides space for power cable termination.
- ABB OT switch-disconnector technology supports dependable manual load switching and isolation.
Key Features
- ABB OT400 enclosed switch-disconnector series.
- Four-pole switching configuration.
- 400 A rated continuous current.
- 400 A AC-22A operational current rating at 380–415 V AC.
- 400 A AC-23A operational current rating at 380–415 V AC.
- 400 A AC-23A operational current rating at 500 V AC and 690 V AC.
- 230 kW AC-23A operational power rating at 415 V AC.
- 400 kW AC-23A operational power rating at 690 V AC.
- IP65 ingress protection.
- Steel-sheet enclosure construction.
- Black pistol-type operating handle.
- I-O / ON-OFF position indication.
- Padlockable operating handle for controlled isolation.
- Cover interlock with defeatable interlock function.
- Blank cable entry arrangement at the top and bottom.
- Installer-prepared cable openings for application-specific connections.
- Neutral and protective earth terminals included.
- No auxiliary contacts fitted as standard.
- Provision for compatible auxiliary contacts.
- Surface-mounted enclosed construction.
- 800 mm enclosure height for high-current industrial applications.
- 24 kg catalogue unit weight.
Technical Specifications
- Manufacturer: ABB
- Series: OT Enclosed Switch Disconnectors
- Model: OT400DLUU4BZ
- ABB order code: OT400DLUU4BZ
- ABB product ID: 1SCA022801R0660
- Product group: 311019 – Metal Enclosed (Loadbreak)
- Product type: Steel enclosed safety switch / load-break switch disconnector
- Number of poles: 4
- Number of switches: 1
- Operating positions: I-O / ON-OFF
- Operating mechanism: Manual rotary operation
- Handle type: Pistol-type handle
- Handle colour: Black
- Enclosure material: Steel sheet
- Ingress protection: IP65
- Rated continuous current (Iu): 400 A
- Rated operational current AC-22A at 380–415 V AC: 400 A
- Rated operational current AC-22A at 690 V AC: 400 A
- Rated operational current AC-23A at 380–415 V AC: 400 A
- Rated operational current AC-23A at 500 V AC: 400 A
- Rated operational current AC-23A at 690 V AC: 400 A
- Maximum motor output AC-23A at 415 V AC: 230 kW
- Maximum motor output AC-23A at 690 V AC: 400 kW
- Maximum rated operational voltage: 1000 V AC
- Rated short-time withstand current (Icw): 15 kA
- Switching function: Manual load-break switching and electrical isolation
- Cable entry configuration: Blank / blank
- Cable entry positions: Top and bottom
- Cable entry preparation: Installer-prepared openings
- Cable glands and flanges: Selected separately to suit the installation
- Neutral terminals: Included
- Protective earth terminals: Included
- Cover arrangement: Interlocked with defeatable interlock
- Padlocking compatibility: Yes
- Auxiliary contacts included: 0 NO + 0 NC
- Maximum auxiliary contact configuration: 2 NO + 2 NC
- Enclosure height: 800 mm
- Enclosure width: 400 mm
- Enclosure depth: 230 mm
- Catalogue unit weight: 24 kg
- Mounting arrangement: Surface-mounted enclosed assembly
- Applicable standards: IEC 60947 series for low-voltage switchgear and switch disconnectors
- Ingress protection classification: IEC 60529
Reliable 400A Four-Pole Electrical Isolation for Industrial Applications
The ABB OT400DLUU4BZ provides a dependable method of manually disconnecting high-current industrial electrical equipment from its power supply. Its four mechanically linked main poles open together when the operating handle is moved to the OFF position, allowing simultaneous disconnection of four conductors. This makes the switch suitable for compatible three-phase installations requiring switched-neutral isolation or other four-pole switching arrangements.
Designed for AC-23A motor-load switching duties, the OT400DLUU4BZ offers a 400 A operational current rating at 380–415 V AC and a maximum motor output of 230 kW at 415 V AC. At 690 V AC, the corresponding catalogue rating is 400 kW. These ratings support the selection of the switch for industrial motors and other inductive loads, provided the operating current, voltage and switching duty remain within the manufacturer's limits.
The IP65 steel enclosure provides robust mechanical construction and environmental protection. When correctly installed and sealed, the enclosure protects against dust ingress and water jets, making it suitable for demanding industrial locations where electrical equipment may be exposed to contamination or moisture.
A distinguishing feature of the OT400DLUU4BZ is its blank top and bottom cable entry arrangement. Unlike variants supplied with predefined cable entry knockouts or ring-flange openings, this model allows installers to prepare suitable openings according to the required cable gland sizes and cable routing arrangements. This provides flexibility for larger power cables and application-specific installation layouts.
The blank cable entry areas are also associated with the enclosure fixing arrangement. Installers should therefore follow ABB's installation instructions when preparing cable openings and mounting the assembly, ensuring that mechanical integrity, electrical clearances and enclosure sealing are maintained. Suitable cable glands and flange accessories must be selected separately.
The black pistol-type operating handle provides clearly identified ON and OFF positions and supports padlocking for maintenance isolation. The enclosure cover is mechanically interlocked with the operating mechanism, helping restrict normal access to internal electrical connections while the switch is ON. A defeatable interlock function permits controlled access for authorised personnel following appropriate electrical safety procedures.
The OT400DLUU4BZ includes neutral and protective earth terminals for compatible four-pole electrical installations. No auxiliary contacts are fitted as standard, although compatible accessories may be installed to provide switch-position indication or feedback to a monitoring system.
As a switch disconnector, the OT400DLUU4BZ performs manual load switching and electrical isolation rather than automatic overload or short-circuit protection. Appropriate protective devices must be selected and installed separately according to the electrical installation requirements and manufacturer's coordination guidance.
Typical Applications
- 400 A industrial electrical isolation.
- Four-pole switching in three-phase electrical systems.
- Electrical installations requiring switched-neutral isolation.
- High-current industrial machinery disconnecting points.
- Industrial motor isolation and maintenance switching.
- Low-voltage power distribution systems.
- Manufacturing plants and production equipment.
- Industrial pumps and pumping stations.
- Large ventilation fans and HVAC plant.
- Compressors and heavy industrial machinery.
- Conveyor and material handling systems.
- Industrial processing and packaging equipment.
- Installations requiring customised cable entry positions.
- Industrial control and power distribution assemblies.
- OEM machinery and electrical equipment manufacturing.
