Why Choose the ABB OT250KLRR3TZ 250A 3-Pole IP65 Steel Enclosed Safety Switch?
The ABB OT250KLRR3TZ (ABB product ID 1SCA022340R1150) is a heavy-duty 250 A, 3-pole steel enclosed safety switch designed for dependable manual load switching and electrical isolation in industrial low-voltage installations. Part of ABB's OT enclosed switch-disconnector range, this assembly combines a robust grey sheet-steel enclosure, black pistol-type operating handle, IP65 ingress protection and divided top and bottom cable entry arrangements.
Engineered for industrial machinery and high-current distribution applications, the OT250KLRR3TZ offers an AC-23A motor-load switching rating of 132 kW at 415 V AC and a corresponding operational current rating of 250 A. Its three mechanically linked switching poles provide simultaneous disconnection of three phase conductors, making it suitable for machinery isolation, industrial distribution systems and maintenance disconnecting points.
The 600 × 400 × 230 mm steel enclosure provides generous space for electrical connections and cable management. Divided cable entry arrangements at the top and bottom incorporate ring-flange entry provisions, while the assembly includes 2 normally open and 1 normally closed auxiliary contacts, protective earth terminals, a padlockable operating handle and an interlocked enclosure cover. These features make the ABB OT250KLRR3TZ a practical solution for industrial installations requiring robust electrical isolation and accessible cable termination.
Key Advantages
- 250 A three-pole switching and isolation for industrial low-voltage electrical equipment.
- 132 kW AC-23A motor-load switching capability at 415 V AC for compatible machinery applications.
- IP65-rated sheet-steel enclosure provides protection against dust and water jets when correctly installed.
- IK09 enclosure impact resistance supports demanding industrial environments.
- Divided top and bottom cable entries simplify the installation of larger power cables.
- Ring-flange cable entry arrangement provides flexible cable routing and gland installation.
- Black pistol-type operating handle offers straightforward manual ON/OFF switching.
- Padlockable operating mechanism supports controlled maintenance isolation.
- Interlocked enclosure cover helps restrict normal access while the switch is ON.
- 2 NO + 1 NC auxiliary contacts included for switch-position signalling.
- Protective earth terminals included for convenient installation.
- 40.5 kA rated conditional short-circuit current when used under the specified protective-device conditions.
- 600 × 400 × 230 mm enclosure accommodates the switching assembly and cable termination arrangements.
- Suitable for industrial distribution, machinery isolation and high-current maintenance disconnecting points.
Key Features
- ABB OT enclosed safety switch range.
- Three-pole switch-disconnector configuration.
- 250 A conventional enclosed thermal current rating.
- 250 A AC-23A operational current rating at 400–415 V AC.
- 132 kW AC-23A operational power rating at 415 V AC.
- 200 kW AC-23A operational power rating at 690 V AC.
- IP65 ingress protection according to IEC 60529.
- IK09 sheet-steel enclosure.
- Grey enclosure with black pistol-type handle.
- I-O / ON-OFF operating positions.
- Padlocking provision for up to three padlocks.
- Cover interlock with defeatable interlock facility.
- Divided cable entry arrangement at the top and bottom.
- Four ring-flange cable entry positions per side.
- Six cover flanges included.
- 2 normally open auxiliary contacts included.
- 1 normally closed auxiliary contact included.
- Auxiliary contacts wired to terminal blocks.
- Protective earth terminals included.
- No neutral terminal supplied.
- Top-in/bottom-out main terminal arrangement.
- 8 kA rated short-time withstand current.
- 40.5 kA rated conditional short-circuit current.
- Surface-mounted steel enclosure for industrial installations.
Technical Specifications
- Manufacturer: ABB
- Series: OT Enclosed Switch Disconnectors
- Model: OT250KLRR3TZ
- ABB order code: OT250KLRR3TZ
- ABB product ID: 1SCA022340R1150
- Product group: 311019 – Metal Enclosed (Loadbreak)
- Product type: Steel enclosed safety switch / switch disconnector
- Number of poles: 3
- Number of switches: 1
- Operating positions: I-O / ON-OFF
- Operating mechanism: Manual
- Handle type: Pistol handle
- Handle colour: Black
- Enclosure material: Sheet steel
- Enclosure colour: Grey
- Ingress protection: IP65
- Impact resistance: IK09
- Conventional enclosed thermal current (Ithe): 250 A
- Rated continuous current (Iu): 250 A
- Rated operational current AC-23A at 400–415 V AC: 250 A
- Rated operational power AC-23A at 230 V AC: 75 kW
- Rated operational power AC-23A at 415 V AC: 132 kW
- Rated operational power AC-23A at 500 V AC: 160 kW
- Rated operational power AC-23A at 690 V AC: 200 kW
- Maximum rated operational voltage: 1000 V AC
- Rated short-time withstand current (Icw): 8 kA
- Rated conditional short-circuit current (Inc): 40.5 kA
- Power loss at rated operating conditions: 6.5 W per pole
- Pollution degree: 3
- Cable entry arrangement: Divided top and bottom entries
- Cable entry type: Ring-flange
- Cable entry positions: Top and bottom
- Cable outlets per side: 4 ring-flange positions
- Additional knockouts: 3 × 10 mm, 12.5 mm, 20.5 mm, 25.5 mm and 32.5 mm
- Cover flanges included: 6
- Main circuit connection: Bolted connection with 8 mm hole diameter
- Protective earth terminal arrangement: Screw-clamp terminals
- Protective earth terminal capacity: 4 × 10–70 mm² plus 4 × M8 connections
- Neutral terminal: Not included
- Position of line terminals: Top-in/bottom-out
- Position of PE terminals: Top-in/bottom-out
- Auxiliary contacts included: 2 NO + 1 NC
- Auxiliary contact wiring: Prewired to terminal blocks
- Cover arrangement: Interlocked with defeatable interlock
- Padlocking facility: Up to 3 padlocks
- Enclosure height: 600 mm
- Enclosure width: 400 mm
- Enclosure depth: 230 mm
- Approximate product weight: 20–21 kg
- Mounting arrangement: Surface-mounted enclosed assembly
- Country of origin: Finland
- GTIN / EAN: 6417019116112
- Applicable standards: IEC 60947-1 and IEC 60947-3
- Ingress protection standard: IEC 60529
Reliable High-Current Electrical Isolation with Divided Cable Entries
The ABB OT250KLRR3TZ provides a dependable method of manually disconnecting three-phase electrical equipment from its power supply. Its three mechanically linked main poles open together when the operating handle is moved to the OFF position, providing simultaneous disconnection of the phase conductors. This makes the switch suitable for industrial machinery, high-current motor circuits and low-voltage electrical distribution installations requiring a dedicated local isolation point.
Designed for AC-23A motor-load switching duties, the OT250KLRR3TZ offers a 250 A operational current rating and 132 kW operational power rating at 415 V AC. The corresponding AC-23A operational power ratings extend to 160 kW at 500 V AC and 200 kW at 690 V AC. These characteristics support use with compatible motors and other highly inductive loads, subject to correct selection for the operating voltage, current and switching duty.
The IP65 sheet-steel enclosure provides robust mechanical and environmental protection for the switching assembly. Its IK09 impact resistance makes it suitable for demanding industrial locations where electrical equipment may be exposed to incidental mechanical impacts. The grey steel housing provides a durable installation solution for factories, processing plants and industrial electrical distribution areas.
A distinguishing feature of the OT250KLRR3TZ is its divided top and bottom cable entry arrangement. The enclosure provides four ring-flange cable entry positions per side, allowing flexible routing and termination of larger power cables. Six cover flanges are included, while additional knockout provisions support smaller cable connections. Suitable cable glands, flange accessories and sealing components must be selected to maintain the specified IP65 protection.
The black pistol-type operating handle provides clear ON/OFF switching and can be secured with up to three padlocks in the OFF position. The enclosure cover is mechanically interlocked with the switch mechanism, helping restrict normal access while the switch is ON. A defeatable interlock facility is provided for authorised access in accordance with appropriate electrical safety procedures.
The OT250KLRR3TZ is supplied with 2 normally open and 1 normally closed auxiliary contacts, prewired to terminal blocks for convenient connection to compatible indication or monitoring circuits. Protective earth terminals are also included. The assembly does not include a neutral terminal, and its three main poles switch the phase conductors.
As a switch disconnector, the OT250KLRR3TZ provides manual load switching and electrical isolation rather than automatic overload or short-circuit protection. Appropriate upstream protective devices must be selected and installed according to the electrical installation requirements and the manufacturer's specified coordination conditions.
Typical Applications
- Industrial motor isolation and local disconnecting points.
- High-current three-phase machinery isolation.
- Industrial electrical distribution systems.
- Manufacturing plants and production equipment.
- Large pumps and pumping stations.
- Industrial ventilation fans and HVAC plant.
- Compressors and auxiliary machinery.
- Conveyor and material handling systems.
- Packaging and processing machinery.
- Industrial maintenance isolation switches.
- Machine-mounted or wall-mounted safety switches.
- Electrical installations requiring divided cable entries.
- Industrial control panels and distribution assemblies.
- OEM machinery and electrical equipment manufacturing.
- Factories, processing plants and heavy industrial installations.
