Why Choose the ABB OTA80S4YX 80A ATEX EMC Enclosed Safety Switch?
The ABB OTA80S4YX (ABB product ID 1SCA152741R1001) is an 80 A ATEX-rated enclosed safety switch designed for reliable manual load switching and electrical isolation in industrial environments where combustible dust may create a potentially explosive atmosphere. Part of ABB's specialist OTA enclosed safety switch range, this assembly combines a robust aluminium enclosure, red/yellow operating handle, IP65 ingress protection and an integrated normally open auxiliary contact.
Designed for demanding industrial machinery applications, the OTA80S4YX provides an 80 A conventional thermal current rating, a 75 A AC-23A operational current rating at 380–415 V AC and a corresponding 37 kW motor-load switching rating. Its three-phase switching arrangement incorporates a switchable neutral, giving the assembly four main switching poles. The included 1 NO auxiliary contact provides an additional signalling connection for compatible monitoring and control circuits.
The OTA80S4YX is designed for ATEX Zone 22 combustible-dust environments, with an equipment classification of Ex tc III T70°C Dc. Its aluminium enclosure is suitable for EMC-sensitive applications when used with appropriate EMC cable glands. Supplied with ATEX cable glands, the switch offers a practical enclosed isolation solution for mills, conveyors, industrial processing equipment and other appropriately classified hazardous-area installations.
Key Advantages
- ATEX hazardous-area suitability: Designed for compatible Zone 22 combustible-dust environments.
- 80 A rated thermal current: Supports industrial machinery and electrical isolation applications.
- 37 kW AC-23A motor-load switching capability: Suitable for compatible three-phase motor circuits at 380–415 V AC.
- 75 A AC-23A operational current: Provides reliable switching of compatible inductive and motor loads.
- Four-pole switching arrangement: Three phase poles and a switchable neutral provide simultaneous conductor isolation.
- IP65 aluminium enclosure: Provides dust-tight protection and resistance to water jets when correctly installed.
- ATEX Ex tc III T70°C Dc classification: Supports use in appropriately assessed combustible-dust atmospheres.
- EMC-compatible installation: Suitable for electromagnetic compatibility applications when used with appropriate EMC cable glands.
- Red/yellow operating handle: Provides highly visible manual switching and isolation control.
- Integrated 1 NO auxiliary contact: Supports switch-position signalling and control-system monitoring.
- ATEX cable glands supplied: Facilitates installation in compatible hazardous-area electrical systems.
- Top and bottom cable entry provisions: Support practical industrial cable routing.
- Compact enclosure dimensions: Provides a space-efficient solution for local machinery isolation.
- ABB industrial switchgear technology: Supports dependable switching and isolation in demanding applications.
Key Features
- ABB OTA ATEX enclosed safety switch series.
- 80 A conventional thermal current rating.
- 75 A AC-23A operational current at 380–415 V AC.
- 37 kW AC-23A operational power at 380–415 V AC.
- Three-phase switching with switchable neutral.
- Four main switching poles.
- ATEX Zone 22 combustible-dust application.
- Ex tc III T70°C Dc classification.
- IP65 ingress protection.
- Aluminium enclosure construction.
- ABB Frontex2 enclosure design.
- Red/yellow rotary operating handle.
- Manual ON/OFF switching.
- Integrated 1 NO auxiliary contact.
- Maximum auxiliary contact arrangement of 2 NO + 2 NC.
- ATEX cable glands included.
- EMC-compatible installation with suitable EMC cable glands.
- Top and bottom cable entry arrangement.
- Screw-clamp main circuit terminals.
- 1.5–35 mm² main circuit conductor connection range.
- 230 × 160 × 118 mm enclosure dimensions.
- IK08 enclosure impact resistance.
- 20,000-operation mechanical durability rating.
Technical Specifications
- Manufacturer: ABB
- Series: OTA ATEX Enclosed Safety Switches
- Model: OTA80S4YX
- ABB order code: OTA80S4YX
- ABB product ID: 1SCA152741R1001
- Product group: 311019 – Metal Enclosed (Loadbreak)
- Product type: ATEX enclosed safety switch / switch disconnector
- Conventional thermal current (Ithe): 80 A
- Rated permanent current (Iu): 80 A
- Number of main switching poles: 4
- Phase switching arrangement: 3-phase
- Neutral arrangement: Switchable neutral
- Operating mechanism: Manual rotary operation
- Handle type: Rotary handle
- Handle colour: Red/yellow
- Operating positions: ON/OFF
- Enclosure type: Frontex2
- Enclosure material: Aluminium
- Ingress protection: IP65
- Impact resistance: IK08
- ATEX classification: Ex tc III T70°C Dc
- Hazardous-area application: Zone 22 combustible-dust atmospheres
- ATEX directive: 2014/34/EU
- Special function: EMC-compatible installation
- Rated operational current AC-22A at 380–415 V AC: 80 A
- Rated operational current AC-22A at 500 V AC: 80 A
- Rated operational current AC-22A at 690 V AC: 80 A
- Rated operational current AC-23A at 380–415 V AC: 75 A
- Rated operational current AC-23A at 500 V AC: 58 A
- Rated operational current AC-23A at 690 V AC: 20 A
- Rated operational power AC-23A at 380–415 V AC: 37 kW
- Rated operational power AC-23A at 500 V AC: 37 kW
- Rated operational power AC-23A at 690 V AC: 18.5 kW
- Rated operational voltage: 750 V AC
- Rated insulation voltage (Ui): 750 V
- Rated conditional short-circuit current: 13 kA
- Rated short-circuit making capacity at 690 V AC: 2.1 kA
- Auxiliary contacts included: 1 NO + 0 NC
- Maximum auxiliary contacts: 2 NO + 2 NC
- Cable entry positions: Top and bottom
- Cable entry outlets: 2 × M40 / 2 × M40 + M16
- Cable glands: ATEX cable glands supplied
- EMC cable glands: Required separately for EMC-compatible installations
- Main circuit terminal type: Screw clamp
- Main circuit conductor cross-section: 1.5–35 mm²
- Protective earth terminal conductor range: 6–35 mm²
- Main circuit tightening torque: 2 N·m
- Recommended screwdriver: Pozidriv 2
- Wire stripping length: 13 mm
- Terminal arrangement: Top in / bottom out
- Power loss per pole at rated operating conditions: 2.8 W
- Mechanical durability: 20,000 operations
- Pollution degree: 3
- Enclosure height: 230 mm
- Enclosure width: 160 mm
- Enclosure depth: 118 mm
- Product net weight: 2.15 kg
- Country of origin: Bulgaria
- Applicable standards: IEC 60947-1 and IEC 60947-3
- Ingress protection standard: IEC 60529
- ATEX certificate reference: 1SCC340068D0201
- Manufacturer technical information: 1SCC340015C0201
- Replacement product reference: OTA63GS4YX
Reliable ATEX Electrical Isolation for Hazardous Dust Environments
The ABB OTA80S4YX is designed for industrial electrical installations where safe manual switching and isolation must be combined with equipment suitability for potentially explosive dust atmospheres. Its ATEX Ex tc III T70°C Dc classification identifies the product as suitable for appropriately assessed Zone 22 applications, subject to the manufacturer's installation requirements and the site's hazardous-area classification.
ATEX Zone 22 environments are locations where an explosive atmosphere in the form of combustible dust is not likely to occur during normal operation and, if it does occur, persists only for a short period. Typical industrial applications include grain processing, milling, conveying, material handling and other processes where combustible dust may be present.
The OTA80S4YX provides an 80 A rated permanent current and a 75 A AC-23A operational current rating at 380–415 V AC. Its 37 kW AC-23A operational power rating supports compatible three-phase motor switching applications. These electrical ratings must be considered alongside the motor's full-load current, starting characteristics and required switching duty.
Although the product is commonly described as a three-phase enclosed safety switch, its actual main circuit configuration comprises four switching poles, including a switchable neutral. This arrangement enables simultaneous switching of the three phase conductors and neutral in compatible electrical systems. The neutral switching arrangement must be assessed against the installation's earthing and supply configuration.
The IP65 aluminium enclosure provides dust-tight protection and resistance to water jets when correctly installed. Its IK08 impact resistance rating offers additional mechanical protection, while the compact enclosure dimensions make the switch suitable for mounting near industrial machinery and processing equipment.
The OTA80S4YX also supports electromagnetic compatibility applications. ABB specifies that the switch can be used in EMC environments when installed with suitable EMC cable glands. These glands help maintain the intended electromagnetic shielding arrangement for screened power cables. Standard ATEX cable glands and EMC cable glands are not interchangeable without confirming their suitability for the hazardous-area and EMC requirements.
The switch is supplied with ATEX cable glands and provides top and bottom cable entry positions. Its main circuit uses screw-clamp terminals suitable for conductors within the specified 1.5–35 mm² connection range. Cable gland selection, protective bonding, conductor termination and enclosure sealing must follow the manufacturer's instructions and the relevant hazardous-area installation standards.
A red/yellow operating handle provides a highly visible means of manual switching. The integrated 1 NO auxiliary contact can be used for compatible indication or control circuits, while the maximum supported auxiliary contact configuration is 2 normally open and 2 normally closed contacts.
As a switch disconnector, the OTA80S4YX provides manual load switching and electrical isolation rather than automatic overload or short-circuit protection. Suitable protective devices must be installed separately, and the complete electrical installation must comply with the applicable ATEX, electrical safety and hazardous-area requirements.
Typical Applications
- ATEX Zone 22 industrial electrical installations.
- Combustible-dust processing environments.
- Grain mills and flour milling equipment.
- Industrial conveyor systems in hazardous dust areas.
- Material handling and bulk solids processing equipment.
- Food processing and powder handling machinery.
- Industrial dust extraction and filtration systems.
- Local motor isolation in appropriately classified hazardous areas.
- Industrial machinery requiring EMC-compatible cable installations.
- Three-phase motor circuits requiring switched-neutral isolation.
- Industrial mixing and blending equipment.
- Packaging and processing machinery.
- Refineries and processing facilities with suitable Zone 22 classifications.
- OEM machinery for combustible-dust environments.
- Industrial maintenance and safety isolation applications.
