Why Choose the ABB OT400DLUU3BZ 400A 3-Pole IP65 Steel Enclosed Safety Switch?
The ABB OT400DLUU3BZ (ABB product ID 1SCA022602R0800) is a heavy-duty 400 A, 3-pole steel enclosed switch disconnector designed for reliable manual load switching and electrical isolation in demanding industrial installations. Part of the ABB OT enclosed switch-disconnector range, this assembly combines a galvanised sheet-steel enclosure, black pistol-type operating handle, blank cable entry arrangement and IP65 ingress protection.
Designed for high-current industrial equipment, the OT400DLUU3BZ 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 three mechanically linked switching poles enable simultaneous disconnection of three-phase conductors, making it suitable for industrial machinery, motor circuits and low-voltage power distribution applications.
The switch is supplied in a substantial 800 × 400 × 230 mm steel enclosure with a polyester-coated finish and blank top and bottom cable entry areas. This configuration enables installers to prepare cable openings according to the required gland sizes and cable routing arrangements. The black padlockable pistol handle, interlocked cover, neutral and protective earth terminals, and provision for optional auxiliary contacts complete a practical high-current electrical isolation solution.
Key Advantages
- 400 A three-pole switching and isolation for demanding industrial electrical installations.
- 230 kW AC-23A motor-load switching capability at 415 V AC for compatible machinery and equipment.
- 400 A AC-23A operational current rating across the specified 380–415 V AC, 500 V AC and 690 V AC operating conditions.
- IP65-rated steel enclosure provides dust-tight protection and resistance to water jets when correctly installed.
- Galvanised sheet-steel construction with a protective polyester coating.
- Blank top and bottom cable entries allow customised cable gland and conduit positioning.
- Prepared for single and parallel cable arrangements to accommodate suitable high-current installations.
- Black pistol-type operating handle provides clear ON/OFF operation.
- Padlocking provision for up to three padlocks supports controlled maintenance isolation.
- Interlocked enclosure cover helps prevent normal access while the switch is ON.
- Defeatable interlock facility permits controlled access by authorised personnel.
- Integrated enclosure pressure-relief design supports personnel protection in the event of an internal arc.
- Door earthing through the hinges forms part of the enclosure's protective bonding arrangement.
- Neutral and protective earth terminals included for convenient electrical installation.
- Optional auxiliary contacts support switch-position indication and control-system integration.
Key Features
- ABB OT400 enclosed switch-disconnector series.
- Three mechanically linked switching poles.
- 400 A rated operational current for specified AC-22A and AC-23A applications.
- 230 kW AC-23A operational power at 415 V AC.
- IP65 ingress protection for demanding industrial environments.
- Galvanised sheet-steel enclosure with polyester-coated finish.
- Black pistol-type rotary operating handle.
- I-O / ON-OFF position indication.
- Padlockable OFF position accommodating up to three padlocks.
- Mechanically interlocked enclosure cover.
- Defeatable cover interlock for authorised inspection procedures.
- Blank top and bottom cable entry configuration.
- Installer-prepared cable openings for application-specific cable glands.
- Enclosure suitable for single and parallel cable arrangements.
- Integrated pressure-relief function within the steel enclosure.
- Enclosure door earthed through its hinges.
- Neutral terminal included.
- Protective earth terminals included.
- No auxiliary contacts fitted as standard.
- Optional auxiliary contact configuration up to 2 NO + 2 NC.
- 800 × 400 × 230 mm enclosure for industrial power cable termination.
- Surface-mounted construction for industrial electrical installations.
Technical Specifications
- Manufacturer: ABB
- Series: OT Enclosed Switch Disconnectors
- Model: OT400DLUU3BZ
- ABB order code: OT400DLUU3BZ
- ABB product ID: 1SCA022602R0800
- Product group: 311019 – Metal Enclosed (Loadbreak)
- Product type: Steel enclosed safety switch / load-break switch disconnector
- Number of poles: 3
- Operating positions: I-O / ON-OFF
- Operating mechanism: Manual rotary operation
- Handle type: Pistol-type handle
- Handle colour: Black
- Enclosure material: Galvanised sheet steel
- Enclosure finish: Polyester coating
- Ingress protection: IP65
- 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
- Cable entry configuration: Blank / blank
- Cable entry positions: Top and bottom
- Cable entry preparation: Installer-prepared openings
- Cable arrangement: Suitable for single and parallel cable configurations
- Cable glands and entry accessories: Selected separately to suit the installation
- Neutral terminal: Included
- Protective earth terminals: Included
- Door earthing: Through enclosure hinges
- Cover arrangement: Mechanically interlocked
- Defeatable interlock: Yes
- Padlocking facility: Up to 3 padlocks
- Auxiliary contacts included: 0 NO + 0 NC
- Maximum auxiliary contacts: 2 NO + 2 NC
- Enclosure pressure relief: Integrated pressure-relief function
- Enclosure height: 800 mm
- Enclosure width: 400 mm
- Enclosure depth: 230 mm
- Catalogue unit weight: 24 kg
- Mounting arrangement: Enclosed surface-mounted assembly
- Country of origin: Finland
- GTIN / EAN: 6417019195179
- Applicable product standards: IEC 60947 series for low-voltage switchgear and switch disconnectors
- Ingress protection classification: IEC 60529
Reliable 400A Industrial Isolation with Flexible Blank Cable Entries
The ABB OT400DLUU3BZ provides a dependable method of manually disconnecting high-current industrial electrical equipment from its power supply. Its three mechanically linked main poles open together when the black operating handle is moved to the OFF position, allowing simultaneous isolation of three phase conductors. This makes it suitable for machinery, motors and electrical distribution installations requiring a dedicated high-current local disconnecting point.
Designed for AC-23A motor-load switching duties, the OT400DLUU3BZ provides a 400 A operational current rating at 380–415 V AC and a maximum motor output rating of 230 kW at 415 V AC. The corresponding catalogue motor output rating at 690 V AC is 400 kW. Actual equipment suitability must be assessed against the operating current, supply voltage, utilisation category and switching duty.
The galvanised steel enclosure with polyester coating provides robust mechanical construction and environmental protection. Its IP65 rating supports installation in industrial locations where dust, moisture and water jets may be present, provided the enclosure is correctly installed and sealed. The protective coating and enclosure design also support appropriately specified outdoor applications.
A distinguishing feature of the OT400DLUU3BZ is its blank top and bottom cable entry arrangement. Unlike variants supplied with predefined ring-flange or C-flange cable entries, this model allows installers to prepare openings according to the required cable gland dimensions and routing. The enclosure is designed to accommodate suitable single and parallel cable arrangements, providing flexibility for higher-current installations.
The blank entry areas also form part of the enclosure's fixing arrangement. Cable openings and mounting positions must therefore be prepared according to ABB's installation instructions, maintaining the necessary clearances and mechanical integrity. Suitable cable glands and sealing accessories are required to preserve the specified IP65 protection.
The black pistol-type operating handle provides clearly identified ON and OFF positions and can be secured with up to three padlocks. The enclosure cover is interlocked with the operating mechanism, helping restrict normal access to internal electrical connections while the switch is ON. A defeatable interlock facility permits controlled access for authorised procedures such as thermographic inspection, subject to appropriate electrical safety controls.
The enclosure incorporates an internal pressure-relief function intended to help manage pressure arising from an internal arc event. The enclosure door is earthed through its hinges, while neutral and protective earth terminals are provided for compatible electrical installations. These features complement the switch's robust enclosed construction but do not replace appropriate fault protection, arc-risk assessment or safe working procedures.
No auxiliary contacts are fitted as standard, although compatible accessories may be added for switch-position signalling. The OT400DLUU3BZ is a switch disconnector rather than a circuit breaker, so suitable overload and short-circuit protective devices must be provided separately according to the electrical installation and manufacturer's coordination requirements.
Typical Applications
- High-current industrial machinery isolation.
- 400 A three-phase electrical disconnecting points.
- Industrial motor isolation and maintenance switching.
- Low-voltage electrical 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.
- Maintenance isolation for industrial electrical equipment.
- Installations requiring customised cable entry positions.
- Electrical installations using single or parallel power cables.
- Industrial control and power distribution assemblies.
- OEM machinery and industrial electrical equipment manufacturing.
