Why Choose the ABB OT400DLRR3TZ 400A 3-Pole IP65 Steel Enclosed Safety Switch?
The ABB OT400DLRR3TZ (1SCA022340R1910) is a heavy-duty 400 A three-pole steel enclosed safety switch-disconnector designed for dependable manual switching and electrical isolation in demanding industrial and commercial installations. Part of ABB's established OT enclosed switch-disconnector range, it combines high-current switching capability with a durable metal enclosure and a practical divided cable entry arrangement.
Rated at 400 A for AC-23A operation at 415 V AC, the OT400DLRR3TZ is suitable for appropriately designed three-phase electrical systems, including industrial machinery supplies, motor feeders and power distribution circuits. Its 220 kW AC-23A motor switching capability at 415 V AC supports applications where reliable load switching and a clearly identifiable local isolation point are essential.
The switch is housed in a galvanised steel enclosure with a protective polyester coating and an IP65 ingress protection rating. A black pistol-grip operating handle provides clear ON/OFF operation and can be secured with up to three padlocks in the OFF position. The enclosure incorporates a mechanically interlocked cover with an authorised interlock defeat facility, helping support controlled inspection and maintenance procedures.
A distinguishing feature of the OT400DLRR3TZ is its divided top and bottom cable entry arrangement with ring-flange openings. ABB specifies four ring-flange cable outlets at each entry side, with five cover flanges included. The enclosure measures 800 × 400 × 230 mm and is supplied with 2NO + 1NC auxiliary contacts, making it a practical solution for high-current electrical isolation with associated control and indication requirements.
Key Advantages
- 400 A rated switching capability for demanding industrial electrical installations.
- Three-pole switching mechanism provides simultaneous disconnection of three phase conductors.
- 220 kW AC-23A motor switching capability at 415 V AC for suitable motor and inductive loads.
- IP65-rated steel enclosure provides protection against dust ingress and water jets when correctly installed.
- Galvanised steel construction with a protective polyester coating for industrial durability.
- Black pistol-grip operating handle provides straightforward manual ON/OFF operation.
- Padlockable OFF position accommodates up to three padlocks for controlled maintenance isolation.
- Mechanically interlocked enclosure cover helps control access to internal switching components.
- Authorised cover interlock defeat facility supports specified inspection procedures.
- Divided cable entry arrangement provides flexibility for power cable routing.
- Top and bottom ring-flange entries accommodate suitable cable entry accessories.
- Four ring-flange outlets per entry side support appropriately designed single and parallel cable installations.
- Five cover flanges included for the specified enclosure configuration.
- Integrated 2NO + 1NC auxiliary contacts support switch-position signalling and control circuit interlocking.
- Protective earth terminal facilities support correct enclosure bonding.
- Surface-mounted construction provides an accessible local isolation point.
- ABB OT switch-disconnector technology designed for dependable industrial switching.
Key Features
- ABB OT enclosed safety switch-disconnector series.
- 400 A AC-23A operational current at 415 V AC.
- 400 A AC-23A operational current at 690 V AC.
- 220 kW AC-23A motor switching power at 415 V AC.
- 355 kW AC-23A motor switching power at 690 V AC.
- Three-pole (3P) switching configuration.
- Manual I-O / ON-OFF operation.
- Black pistol-grip operating handle.
- OFF-position padlocking for up to three padlocks.
- Mechanically interlocked enclosure cover.
- Defeatable cover interlock for authorised procedures.
- IP65 enclosure protection rating.
- Galvanised steel enclosure with polyester coating.
- Integrated enclosure pressure relief design.
- Enclosure door earthing through the hinge arrangement.
- Divided top and bottom cable entry system.
- Four ring-flange cable outlets per entry side.
- Five cover flanges included.
- Ring-flange knockouts for suitable cable entry accessories.
- 2NO + 1NC auxiliary contacts included.
- Auxiliary contacts wired to terminal blocks.
- Surface-mounted, front-operated construction.
- 800 × 400 × 230 mm enclosure dimensions.
- Approximately 27 kg catalogue weight.
Technical Specifications
- Manufacturer: ABB
- Series: OT Enclosed Switch-Disconnectors
- Model: OT400DLRR3TZ
- ABB order code: OT400DLRR3TZ
- ABB product ID: 1SCA022340R1910
- ABB product group: 311019-Metal Enclosed (Loadbreak)
- Product type: Steel enclosed safety switch-disconnector
- Rated current: 400 A
- Number of poles: 3
- Rated operational current AC-23A at 415 V AC: 400 A
- Rated operational current AC-23A at 690 V AC: 400 A
- Rated motor switching power AC-23A at 230 V AC: 110 kW
- Rated motor switching power AC-23A at 415 V AC: 220 kW
- Rated motor switching power AC-23A at 500 V AC: 280 kW
- Rated motor switching power AC-23A at 690 V AC: 355 kW
- Rated operational voltage: Up to 750 V AC, subject to the applicable utilisation category
- Switching positions: I-O / ON-OFF
- Operating mechanism: Manual pistol-grip handle
- Handle colour: Black
- Handle padlocking: Up to three padlocks in the OFF position
- Cover interlock: Mechanically interlocked
- Defeatable cover interlock: Yes, for authorised procedures
- Enclosure material: Galvanised steel
- Enclosure coating: Protective polyester coating
- Enclosure protection rating: IP65
- Enclosure pressure relief: Integrated pressure relief design
- Door earthing: Through enclosure hinges
- Mounting type: Surface mounting
- Operating direction: Front operation
- Cable entry arrangement: Divided top and bottom cable entries
- Cable entry type: Ring-flange openings
- Ring-flange outlets per side: 4
- Total ring-flange outlet positions: 8
- Cover flanges included: 5
- Ring-flange knockout diameters: 10, 12.5, 20.5, 25.5 and 32.5 mm
- Auxiliary contacts included: 2NO + 1NC
- Maximum auxiliary contact configuration: 2NO + 1NC
- Auxiliary contact termination: Wired to terminal blocks
- Protective earth terminal: Included
- Main circuit terminal type: Screw clamp
- Enclosure height: 800 mm
- Enclosure width: 400 mm
- Enclosure depth: 230 mm
- Dimensions (H × W × D): 800 × 400 × 230 mm
- Catalogue weight: Approximately 27 kg
- EAN / GTIN: 6417019116402
- Country of origin: Finland
- Applicable product standard: IEC 60947-3
- ABB catalogue reference: 1SCC340015C0201
High-Current Three-Phase Isolation with Divided Ring-Flange Cable Entries
The ABB OT400DLRR3TZ provides a clearly identifiable local isolation point for industrial electrical systems operating at substantial current levels. Its three-pole switch-disconnector mechanism allows all three phase conductors to be disconnected together, making it suitable for machinery maintenance, electrical servicing and planned isolation of industrial distribution circuits.
The black pistol-grip handle offers straightforward manual switching between the ON and OFF positions. Its OFF-position padlocking facility accommodates up to three padlocks, helping prevent unintended operation while maintenance is being carried out. The enclosure cover is mechanically interlocked with the switch mechanism and incorporates a defeatable interlock facility intended for authorised procedures.
The IP65 galvanised steel enclosure is designed for demanding industrial environments. Its polyester coating provides additional surface protection, while the enclosed construction helps prevent dust and water jets from reaching internal switching components when correctly installed. ABB also identifies an integrated pressure relief function and door earthing through the hinge arrangement. These features complement, but do not replace, suitable upstream circuit protection and safe working procedures.
A distinguishing installation feature is the divided ring-flange cable entry system. The OT400DLRR3TZ provides four ring-flange outlet positions at the top and four at the bottom, allowing cable routing to be adapted to the electrical installation. The supplied cover flanges incorporate knockouts for smaller cable entry fittings, while compatible additional accessories can be selected to suit the required cable arrangement.
Compared with the ABB OT400DLCC3TZ, which uses C-flange cable entry openings, the OT400DLRR3TZ uses divided ring-flange entries. This distinction is important when selecting an enclosed switch for an installation with specific cable gland, cable routing or enclosure entry requirements.
The switch is supplied with 2NO + 1NC auxiliary contacts, wired to terminal blocks for integration into suitable control and indication circuits. These contacts can be used to monitor switch position or support electrical interlocking functions, subject to their rated electrical characteristics and the overall control system design.
As a switch-disconnector rather than an automatic protective device, the OT400DLRR3TZ does not independently provide overload or short-circuit protection. Suitable fuses, circuit breakers or other protective devices must be installed separately. The switch must also be selected according to the relevant utilisation category, operating voltage and load characteristics.
Typical Applications
- 400 A three-phase industrial electrical isolation.
- High-current machinery supply disconnection.
- Industrial motor feeder isolation.
- Manufacturing and production plant installations.
- Electrical distribution and sub-distribution systems.
- Industrial conveyor and material handling equipment.
- Large pumping stations and water treatment facilities.
- Industrial ventilation and extraction systems.
- Heating, ventilation and air conditioning plant.
- Commercial and industrial building services.
- Industrial plant rooms and electrical switchrooms.
- Process control and automation installations.
- OEM machinery and electrical equipment assemblies.
- Installations requiring divided top and bottom ring-flange cable entries.
- Appropriately designed indoor and outdoor electrical installations.
