Why Choose the ABB OT400ESUR3TZ 400A 3-Pole IP65 Stainless Steel Enclosed Safety Switch?
The ABB OT400ESUR3TZ (1SCA102323R1001) is a heavy-duty 400 A three-pole stainless steel enclosed safety switch-disconnector designed for dependable electrical isolation and manual load switching in demanding industrial environments. Part of ABB's OT enclosed safety switch range, it combines high-current switching capability with a corrosion-resistant, acid-proof stainless steel enclosure and a bottom cable entry arrangement.
Rated for 400 A AC-23A operation at 415 V AC, the OT400ESUR3TZ offers a corresponding 220 kW motor switching capability at this voltage. Its three-pole switching mechanism allows the three phase conductors to be disconnected simultaneously, providing a clearly identifiable local isolation point for industrial machinery, motor feeders and electrical distribution equipment.
The switch is housed in an IP65-rated stainless steel enclosure with a hinged cover and a stainless steel pistol-grip operating handle. Its corrosion-resistant construction makes it particularly suitable for appropriately designed installations in environments where moisture, cleaning processes or corrosive atmospheric conditions may make conventional painted steel enclosures less desirable.
A key feature of the OT400ESUR3TZ is its bottom-only main cable entry arrangement, incorporating four ring-flange openings and a separate 25.5 mm control cable knockout. The top cable entry area is blanked, allowing incoming and outgoing cable routing to be concentrated at the bottom of the enclosure. The switch is supplied with 2NO + 1NC auxiliary contacts, a protective earth terminal and an enclosure measuring 800 × 400 × 230 mm.
Key Advantages
- 400 A rated switching capability for high-current industrial electrical installations.
- Three-pole switching configuration provides simultaneous isolation of three phase conductors.
- 220 kW AC-23A motor switching capability at 415 V AC for suitable industrial motor loads.
- Acid-proof stainless steel enclosure offers enhanced resistance to corrosion in demanding environments.
- IP65 ingress protection provides protection against dust and water jets when correctly installed.
- Stainless steel pistol-grip operating handle provides robust manual ON/OFF operation.
- Padlockable OFF position supports controlled maintenance isolation procedures.
- Hinged enclosure cover allows access for authorised inspection and servicing.
- Bottom-only cable entry arrangement supports installations requiring cables to enter from below.
- Four ring-flange openings provide flexible main cable entry options.
- Separate 25.5 mm control cable knockout supports auxiliary wiring.
- Blanked top cable entry area helps avoid unnecessary upper enclosure penetrations.
- Integrated 2NO + 1NC auxiliary contacts support switch-position signalling and control interlocking.
- Protective earth terminal included for correct electrical bonding.
- Surface-mounted construction provides a durable local isolation point.
- ABB industrial switching technology designed for dependable high-current operation.
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) main switching configuration.
- Manual I-O / ON-OFF operation.
- Stainless steel pistol-grip operating handle.
- OFF-position padlocking facility.
- Hinged stainless steel enclosure cover.
- IP65 enclosure protection rating.
- Acid-proof stainless steel sheet enclosure.
- Bottom-only main cable entry configuration.
- Four ring-flange cable entry openings.
- 25.5 mm control cable knockout.
- Top cable entry area supplied blanked.
- 2NO + 1NC auxiliary contacts included.
- Maximum auxiliary contact configuration of 2NO + 1NC.
- Protective earth terminal included.
- Surface-mounted, front-operated construction.
- 800 × 400 × 230 mm enclosure dimensions.
- Approximately 34 kg catalogue weight.
Technical Specifications
- Manufacturer: ABB
- Series: OT Enclosed Safety Switches
- Model: OT400ESUR3TZ
- ABB order code: OT400ESUR3TZ
- ABB product ID: 1SCA102323R1001
- ABB product group: 311019-Metal Enclosed (Loadbreak)
- Product type: Stainless 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 400–415 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
- Switching positions: I-O / ON-OFF
- Operating mechanism: Manual pistol-grip handle
- Handle material: Stainless steel
- Handle padlocking: OFF-position padlocking facility
- Enclosure material: Acid-proof stainless steel sheet
- Enclosure protection rating: IP65
- Enclosure cover: Hinged
- Mounting type: Surface mounting
- Operating direction: Front operation
- Main cable entry arrangement: Bottom only
- Top cable entry arrangement: Blanked
- Bottom cable entry type: Ring-flange openings
- Bottom ring-flange openings: 4
- Control cable knockout: 25.5 mm diameter
- Compatible cable flanges and compression glands: Ordered separately
- Auxiliary contacts included: 2NO + 1NC
- Maximum auxiliary contact configuration: 2NO + 1NC
- Protective earth terminal: Included
- Enclosure height: 800 mm
- Enclosure width: 400 mm
- Enclosure depth: 230 mm
- Dimensions (H × W × D): 800 × 400 × 230 mm
- Catalogue weight: Approximately 34 kg
- Applicable product standard: IEC 60947-3
- ABB catalogue reference: 1SCC340015C0201
High-Current Electrical Isolation with Corrosion-Resistant Stainless Steel Construction
The ABB OT400ESUR3TZ is designed to provide a clearly identifiable isolation point for three-phase electrical systems operating at substantial current levels. Its three-pole switch-disconnector mechanism allows all three phase conductors to be opened together, supporting planned maintenance, inspection and servicing of industrial machinery and electrical distribution equipment.
The stainless steel enclosure is a significant advantage in demanding environments. ABB describes this enclosed safety switch range as using acid-proof stainless steel sheet, making it suitable for appropriately specified applications where corrosion resistance is important. Such environments may include food processing facilities, water treatment plants, industrial washdown areas and other installations exposed to moisture or corrosive atmospheres.
The enclosure provides an IP65 protection rating, meaning it is designed to prevent dust ingress and resist water jets under the applicable test conditions. Maintaining this rating requires correct installation, suitable cable glands, effective sealing and appropriate treatment of all cable entry openings. The actual environmental suitability must be assessed against the chemicals, cleaning processes and operating conditions present at the installation site.
The stainless steel pistol-grip operating handle provides manual ON/OFF switching and supports OFF-position padlocking. This helps prevent unintended operation during maintenance when used as part of an appropriate isolation and lockout procedure. Personnel must still verify that the electrical circuit is de-energised before commencing work.
A key installation feature is the bottom-only cable entry arrangement. The OT400ESUR3TZ provides four ring-flange openings for main cables and a separate 25.5 mm control cable knockout at the bottom of the enclosure. The top entry area is blanked, helping installers route cables from below without creating unnecessary openings in the upper enclosure surface.
The 2NO + 1NC auxiliary contacts can be integrated into appropriately designed control and indication circuits. They may be used to provide switch-position feedback or support interlocking functions, subject to their electrical ratings and the overall control system design.
As a switch-disconnector rather than an automatic protective device, the OT400ESUR3TZ does not independently provide overload or short-circuit protection. Suitable upstream circuit breakers, fuses or other protective devices must be incorporated into the installation, and the switch must be selected according to the applicable operational current, voltage and utilisation-category ratings.
Typical Applications
- 400 A three-phase industrial electrical isolation.
- High-current machinery supply disconnection.
- Industrial motor feeder isolation.
- Food and beverage processing facilities.
- Water treatment and wastewater processing plants.
- Industrial washdown environments.
- Manufacturing and production machinery.
- Chemical processing installations, subject to material compatibility.
- Industrial pumping stations.
- Commercial and industrial building services.
- Industrial plant rooms and electrical switchrooms.
- Process control and automation systems.
- OEM machinery and electrical equipment assemblies.
- Installations requiring corrosion-resistant stainless steel enclosures.
- Applications requiring bottom-only cable entry arrangements.
